From fd958870018b0d614278c67dd4d9697099f67b09 Mon Sep 17 00:00:00 2001 From: Ingvar Stepanyan Date: Fri, 20 Feb 2015 16:32:54 +0200 Subject: [PATCH 01/78] Rename `AwaitExpression.delegate` -> `.all` --- escodegen.js | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/escodegen.js b/escodegen.js index 5172c21f..7c272eb9 100644 --- a/escodegen.js +++ b/escodegen.js @@ -1978,7 +1978,7 @@ AwaitExpression: function (expr, precedence, flags) { var result = join( - expr.delegate ? 'await*' : 'await', + expr.all ? 'await*' : 'await', this.generateExpression(expr.argument, Precedence.Await, E_TTT) ); return parenthesize(result, Precedence.Await, precedence); From 1b3d9bca0347800c142553086ff91dde236a40d3 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Tue, 28 Apr 2015 09:16:49 -0700 Subject: [PATCH 02/78] fixes #231: generate strings with fewer escape sequences by default --- escodegen.js | 2 +- test/options.js | 12 ++++++------ 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/escodegen.js b/escodegen.js index 7c272eb9..30132a80 100644 --- a/escodegen.js +++ b/escodegen.js @@ -469,7 +469,7 @@ } else if (esutils.code.isLineTerminator(code) || code === 0x5C /* \ */) { result += escapeDisallowedCharacter(code); continue; - } else if ((json && code < 0x20 /* SP */) || !(json || escapeless || (code >= 0x20 /* SP */ && code <= 0x7E /* ~ */))) { + } else if (!esutils.code.isIdentifierPart(code) && (json && code < 0x20 /* SP */ || !json && !escapeless && (code < 0x20 /* SP */ || code > 0x7E /* ~ */))) { result += escapeAllowedCharacter(code, str.charCodeAt(i + 1)); continue; } diff --git a/test/options.js b/test/options.js index 0026f1c6..874133dd 100644 --- a/test/options.js +++ b/test/options.js @@ -325,7 +325,7 @@ data = [{ '+\' !"#$%&\\\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\';', '+\'\\x7F\'': '+\'\\x7F\';', '+\'\\x80\'': '+\'\\x80\';', - '+\'\\u0100\'': '+\'\\u0100\';', + '+\'\\u0100\'': '+\'\u0100\';', '+\'hello, world\\n\'': '+\'hello, world\\n\';', '+"hello, world\\n"': '+\'hello, world\\n\';' } @@ -362,7 +362,7 @@ data = [{ '+" !\\"#$%&\'()*+,-.\\/0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\\\]^_`abcdefghijklmnopqrstuvwxyz{|}~";', '+\'\\x7F\'': '+"\x7F";', '+\'\\x80\'': '+"\x80";', - '+\'\\u0100\'': '+"\u0100";', + '+\'\\u0101\'': '+"\u0101";', '+\'hello, world\\n\'': '+"hello, world\\n";', '+"hello, world\\n"': '+"hello, world\\n";' } @@ -399,7 +399,7 @@ data = [{ '+" !\\"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\\\]^_`abcdefghijklmnopqrstuvwxyz{|}~";', '+\'\\x7F\'': '+"\\x7F";', '+\'\\x80\'': '+"\\x80";', - '+\'\\u0100\'': '+"\\u0100";', + '+\'\\u0102\'': '+"\u0102";', '+\'hello, world\\n\'': '+"hello, world\\n";', '+"hello, world\\n"': '+"hello, world\\n";' } @@ -436,7 +436,7 @@ data = [{ '+\' !"#$%&\\\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\';', '+\'\\x7F\'': '+\'\\x7F\';', '+\'\\x80\'': '+\'\\x80\';', - '+\'\\u0100\'': '+\'\\u0100\';', + '+\'\\u0103\'': '+\'\u0103\';', '+\'hello, world\\n\'': '+\'hello, world\\n\';', '+"hello, world\\n"': '+\'hello, world\\n\';' } @@ -473,7 +473,7 @@ data = [{ '+\' !"#$%&\\\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\';', '+\'\\x7F\'': '+\'\x7F\';', '+\'\\x80\'': '+\'\x80\';', - '+\'\\u0100\'': '+\'\u0100\';', + '+\'\\u0104\'': '+\'\u0104\';', '+\'hello, world\\n\'': '+\'hello, world\\n\';', '+"hello, world\\n"': '+\'hello, world\\n\';' } @@ -510,7 +510,7 @@ data = [{ '+\' !"#$%&\\\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\';', '+\'\\x7F\'': '+\'\\x7F\';', '+\'\\x80\'': '+\'\\x80\';', - '+\'\\u0100\'': '+\'\\u0100\';', + '+\'\\u0105\'': '+\'\\u0105\';', '+\'hello, world\\n\'': '+\'hello, world\\n\';', '+"hello, world\\n"': '+"hello, world\\n";' } From a01f6703c0bbf5900cf77ace219eeb5fd3cdb547 Mon Sep 17 00:00:00 2001 From: Yusuke Suzuki Date: Thu, 14 May 2015 00:54:09 +0900 Subject: [PATCH 03/78] Update esutils version --- escodegen.js | 8 ++++---- package.json | 2 +- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/escodegen.js b/escodegen.js index 30132a80..45b63289 100644 --- a/escodegen.js +++ b/escodegen.js @@ -469,7 +469,7 @@ } else if (esutils.code.isLineTerminator(code) || code === 0x5C /* \ */) { result += escapeDisallowedCharacter(code); continue; - } else if (!esutils.code.isIdentifierPart(code) && (json && code < 0x20 /* SP */ || !json && !escapeless && (code < 0x20 /* SP */ || code > 0x7E /* ~ */))) { + } else if (!esutils.code.isIdentifierPartES5(code) && (json && code < 0x20 /* SP */ || !json && !escapeless && (code < 0x20 /* SP */ || code > 0x7E /* ~ */))) { result += escapeAllowedCharacter(code, str.charCodeAt(i + 1)); continue; } @@ -561,7 +561,7 @@ rightCharCode = rightSource.charCodeAt(0); if ((leftCharCode === 0x2B /* + */ || leftCharCode === 0x2D /* - */) && leftCharCode === rightCharCode || - esutils.code.isIdentifierPart(leftCharCode) && esutils.code.isIdentifierPart(rightCharCode) || + esutils.code.isIdentifierPartES5(leftCharCode) && esutils.code.isIdentifierPartES5(rightCharCode) || leftCharCode === 0x2F /* / */ && rightCharCode === 0x69 /* i */) { // infix word operators all start with `i` return [left, noEmptySpace(), right]; } else if (esutils.code.isWhiteSpace(leftCharCode) || esutils.code.isLineTerminator(leftCharCode) || @@ -1825,7 +1825,7 @@ leftSource = fragment.toString(); - if (leftSource.charCodeAt(leftSource.length - 1) === 0x2F /* / */ && esutils.code.isIdentifierPart(expr.operator.charCodeAt(0))) { + if (leftSource.charCodeAt(leftSource.length - 1) === 0x2F /* / */ && esutils.code.isIdentifierPartES5(expr.operator.charCodeAt(0))) { result = [fragment, noEmptySpace(), expr.operator]; } else { result = join(fragment, expr.operator); @@ -1949,7 +1949,7 @@ rightCharCode = fragment.toString().charCodeAt(0); if (((leftCharCode === 0x2B /* + */ || leftCharCode === 0x2D /* - */) && leftCharCode === rightCharCode) || - (esutils.code.isIdentifierPart(leftCharCode) && esutils.code.isIdentifierPart(rightCharCode))) { + (esutils.code.isIdentifierPartES5(leftCharCode) && esutils.code.isIdentifierPartES5(rightCharCode))) { result.push(noEmptySpace()); result.push(fragment); } else { diff --git a/package.json b/package.json index 7c0522ac..9ec7ebbf 100644 --- a/package.json +++ b/package.json @@ -32,7 +32,7 @@ }, "dependencies": { "estraverse": "^1.9.1", - "esutils": "^1.1.6", + "esutils": "^2.0.2", "esprima": "^1.2.2", "optionator": "^0.5.0" }, From 02d47fee6e9822173d408123a9ea2583aa16cb38 Mon Sep 17 00:00:00 2001 From: Gilad Peleg Date: Tue, 19 May 2015 12:57:23 +0300 Subject: [PATCH 04/78] update license attribute specifying the type and URL is deprecated: https://docs.npmjs.com/files/package.json#license http://npm1k.org/ --- package.json | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/package.json b/package.json index 9ec7ebbf..39b72169 100644 --- a/package.json +++ b/package.json @@ -51,12 +51,7 @@ "gulp-mocha": "^2.0.0", "semver": "^4.1.0" }, - "licenses": [ - { - "type": "BSD", - "url": "http://github.com/estools/escodegen/raw/master/LICENSE.BSD" - } - ], + "license": "BSD-2-Clause", "scripts": { "test": "gulp travis", "unit-test": "gulp test", From f8bc1d5d0455a91a079943a3282dd4571d952e88 Mon Sep 17 00:00:00 2001 From: Edward Faulkner Date: Wed, 27 May 2015 14:26:36 -0400 Subject: [PATCH 05/78] Support RestElement Closes #225 --- escodegen.js | 4 ++++ test/harmony.js | 35 +++++++++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+) diff --git a/escodegen.js b/escodegen.js index 45b63289..3f1c330a 100644 --- a/escodegen.js +++ b/escodegen.js @@ -2062,6 +2062,10 @@ return result; }, + RestElement: function(expr, precedence, flags) { + return '...' + generateIdentifier(expr.argument); + }, + ClassExpression: function (expr, precedence, flags) { var result, fragment; result = ['class']; diff --git a/test/harmony.js b/test/harmony.js index 625cb5f1..68f94b32 100644 --- a/test/harmony.js +++ b/test/harmony.js @@ -1459,6 +1459,41 @@ data = { expression: false }] } + }, + + '[\n x,\n ...y\n] = list;': { + generateFrom: { + "type": "Program", + "body": [ + { + "type": "ExpressionStatement", + "expression": { + "type": "AssignmentExpression", + "operator": "=", + "left": { + "type": "ArrayPattern", + "elements": [ + { + "type": "Identifier", + "name": "x" + }, + { + "type": "RestElement", + "argument": { + "type": "Identifier", + "name": "y" + } + } + ] + }, + "right": { + "type": "Identifier", + "name": "list" + } + } + } + ] + } } }, From ed529d5d32a2f74d0abf3033b5ffa341e0ebd24e Mon Sep 17 00:00:00 2001 From: Yusuke Suzuki Date: Thu, 28 May 2015 03:40:12 +0900 Subject: [PATCH 06/78] Update node.js versions of travis --- .travis.yml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/.travis.yml b/.travis.yml index 4b59f8df..72500ec2 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,7 +1,7 @@ language: node_js node_js: - - "0.10" - "0.11" + - "0.12" matrix: allow_failures: From 5070077d838c7f098dcab9c701331af37db1e763 Mon Sep 17 00:00:00 2001 From: Edward Faulkner Date: Wed, 27 May 2015 14:46:27 -0400 Subject: [PATCH 07/78] Improved ArrayPattern formatting --- escodegen.js | 6 ++--- .../spread-element.expected.js | 24 ++++--------------- .../destructuring-assignment.expected.js | 21 ++++------------ .../spread-element.expected.js | 12 ++-------- test/harmony.js | 6 ++--- 5 files changed, 16 insertions(+), 53 deletions(-) diff --git a/escodegen.js b/escodegen.js index 3f1c330a..84edc1a2 100644 --- a/escodegen.js +++ b/escodegen.js @@ -2025,15 +2025,15 @@ }, ArrayPattern: function (expr, precedence, flags) { - return this.ArrayExpression(expr, precedence, flags); + return this.ArrayExpression(expr, precedence, flags, true); }, - ArrayExpression: function (expr, precedence, flags) { + ArrayExpression: function (expr, precedence, flags, isPattern) { var result, multiline, that = this; if (!expr.elements.length) { return '[]'; } - multiline = expr.elements.length > 1; + multiline = isPattern ? false : expr.elements.length > 1; result = ['[', multiline ? newline : '']; withIndent(function (indent) { var i, iz; diff --git a/test/compare-fixed-harmony/spread-element.expected.js b/test/compare-fixed-harmony/spread-element.expected.js index 48a01abd..80bf18b6 100644 --- a/test/compare-fixed-harmony/spread-element.expected.js +++ b/test/compare-fixed-harmony/spread-element.expected.js @@ -1,22 +1,6 @@ -var [ - a, - b, - ...rest -] = array; -const [ - a, - b, - ...rest -] = array; -function a([ - a, - b, - ...rest -]) { +var [a, b, ...rest] = array; +const [a, b, ...rest] = array; +function a([a, b, ...rest]) { } -([ - a, - b, - ...rest -]) => { +([a, b, ...rest]) => { }; diff --git a/test/compare-harmony/destructuring-assignment.expected.js b/test/compare-harmony/destructuring-assignment.expected.js index 227c366b..6d4a1bb0 100644 --- a/test/compare-harmony/destructuring-assignment.expected.js +++ b/test/compare-harmony/destructuring-assignment.expected.js @@ -2,27 +2,14 @@ function t1({responseText: responseText}) { } function t2({responseText}) { } -function t3([ - a, - b -]) { +function t3([a, b]) { } -var [ - i, - j, - k -] = array; +var [i, j, k] = array; var {i, j, k} = obj; let {i, j, k} = obj; const {i, j, k} = obj; var {value} = obj; var {value} = obj; var [obj.hello] = prop; -var [ - obj.hello, - ...obj.ok -] = prop; -var [ - obj.hello, - ...obj['hello'] -] = prop; +var [obj.hello, ...obj.ok] = prop; +var [obj.hello, ...obj['hello']] = prop; diff --git a/test/compare-harmony/spread-element.expected.js b/test/compare-harmony/spread-element.expected.js index 2533b3c2..9de0bf33 100644 --- a/test/compare-harmony/spread-element.expected.js +++ b/test/compare-harmony/spread-element.expected.js @@ -1,10 +1,2 @@ -var [ - a, - b, - ...rest -] = array; -const [ - a, - b, - ...rest -] = array; +var [a, b, ...rest] = array; +const [a, b, ...rest] = array; diff --git a/test/harmony.js b/test/harmony.js index 68f94b32..11102937 100644 --- a/test/harmony.js +++ b/test/harmony.js @@ -1380,7 +1380,7 @@ data = { } }, - 'for (let [\n a,\n b\n ] in obj) {\n}': { + 'for (let [a, b] in obj) {\n}': { generateFrom: { type: 'Program', body: [{ @@ -1421,7 +1421,7 @@ data = { } }, - 'function getIdField([\n a,\n b,\n c\n]) {\n}': { + 'function getIdField([a, b, c]) {\n}': { generateFrom: { type: 'Program', body: [{ @@ -1461,7 +1461,7 @@ data = { } }, - '[\n x,\n ...y\n] = list;': { + '[x, ...y] = list;': { generateFrom: { "type": "Program", "body": [ From 7f5a86d14def7c5dc61d88da423576382844b8a2 Mon Sep 17 00:00:00 2001 From: Edward Faulkner Date: Thu, 28 May 2015 10:10:48 -0400 Subject: [PATCH 08/78] expand RestElement to support all patterns This is a followup to #236 that brings RestElement into full spec compliance. --- escodegen.js | 2 +- test/harmony.js | 41 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+), 1 deletion(-) diff --git a/escodegen.js b/escodegen.js index 84edc1a2..f706c054 100644 --- a/escodegen.js +++ b/escodegen.js @@ -2063,7 +2063,7 @@ }, RestElement: function(expr, precedence, flags) { - return '...' + generateIdentifier(expr.argument); + return '...' + this.generatePattern(expr.argument); }, ClassExpression: function (expr, precedence, flags) { diff --git a/test/harmony.js b/test/harmony.js index 11102937..8c40ef1b 100644 --- a/test/harmony.js +++ b/test/harmony.js @@ -1494,6 +1494,47 @@ data = { } ] } + }, + '[x, ...[y,z]] = list;': { + "type": "Program", + "body": [ + { + "type": "ExpressionStatement", + "expression": { + "type": "AssignmentExpression", + "operator": "=", + "left": { + "type": "ArrayPattern", + "elements": [ + { + "type": "Identifier", + "name": "x" + }, + { + "type": "RestElement", + "argument": { + "type": "ArrayPattern", + "elements": [ + { + "type": "Identifier", + "name": "y" + }, + { + "type": "Identifier", + "name": "z" + } + ] + } + } + ] + }, + "right": { + "type": "Identifier", + "name": "list" + } + } + } + ] } }, From a216a16df843a7a634dc2b9f2486685f3290b531 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Sun, 9 Aug 2015 08:09:49 -0700 Subject: [PATCH 09/78] use "sudo: false" in travis config for faster builds --- .travis.yml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/.travis.yml b/.travis.yml index 72500ec2..b5aa9f8c 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,8 +1,8 @@ +sudo: false language: node_js node_js: - "0.11" - "0.12" - matrix: allow_failures: - node_js: "0.11" From 609c9694cb0363194e7dd200375f1322104d1549 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Sun, 9 Aug 2015 08:24:47 -0700 Subject: [PATCH 10/78] replace * version for esprima-moz with actual version --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 39b72169..4f21f69f 100644 --- a/package.json +++ b/package.json @@ -45,7 +45,7 @@ "bower-registry-client": "^0.2.1", "chai": "^1.10.0", "commonjs-everywhere": "^0.9.7", - "esprima-moz": "*", + "esprima-moz": "1.0.0-dev-harmony-moz", "gulp": "^3.8.10", "gulp-eslint": "^0.2.0", "gulp-mocha": "^2.0.0", From 19bf5d0585892561309e482f829c3583f4c840cc Mon Sep 17 00:00:00 2001 From: Sterling Williams Date: Tue, 25 Aug 2015 16:23:17 -0600 Subject: [PATCH 11/78] add support for super() --- escodegen.js | 4 ++++ test/harmony.js | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 40 insertions(+) diff --git a/escodegen.js b/escodegen.js index f706c054..712b4d83 100644 --- a/escodegen.js +++ b/escodegen.js @@ -2227,6 +2227,10 @@ return 'this'; }, + Super: function (expr, precedence, flags) { + return 'super'; + }, + Identifier: function (expr, precedence, flags) { return generateIdentifier(expr); }, diff --git a/test/harmony.js b/test/harmony.js index 8c40ef1b..98cc746c 100644 --- a/test/harmony.js +++ b/test/harmony.js @@ -4381,6 +4381,42 @@ data = { } }, + 'Harmony super': { + 'super.abc();': { + generateFrom: { + type: 'ExpressionStatement', + expression: { + type: 'CallExpression', + callee: { + type: 'MemberExpression', + computed: false, + object: { + type: 'Super' + }, + property: { + type: 'Identifier', + name: 'abc' + } + }, + arguments: [] + } + } + }, + + 'super();': { + generateFrom: { + type: 'ExpressionStatement', + expression: { + type: 'CallExpression', + callee: { + type: 'Super' + }, + arguments: [] + } + } + } + }, + 'Harmony async/await': { 'async function foo(promise) {\n await promise;\n}': { generateFrom: { From f2879cd6f3f95577143b6fbd014b6c9f5fea80d3 Mon Sep 17 00:00:00 2001 From: Adam Mcgrath Date: Wed, 1 Jul 2015 17:14:57 +0100 Subject: [PATCH 12/78] Add support for esprima 2.x import and export statements --- escodegen.js | 18 +- .../{esprima.js => esprima-1.0.0-dev.js} | 0 test/3rdparty/esprima-2.5.0.js | 5658 +++++++++++++++++ test/api.js | 2 +- test/ast.js | 2 +- test/compare-esprima2.js | 106 + .../export-default-declaration.expected.js | 2 + ...export-default-declaration.expected.min.js | 1 + .../export-default-declaration.js | 3 + .../import-with-default.expected.js | 8 + .../import-with-default.expected.min.js | 1 + test/compare-esprima2/import-with-default.js | 8 + test/compare.js | 2 +- test/directive.js | 2 +- test/identity.js | 2 +- test/options.js | 2 +- test/source-map.js | 2 +- test/test.js | 2 +- test/verbatim.js | 2 +- 19 files changed, 5810 insertions(+), 13 deletions(-) rename test/3rdparty/{esprima.js => esprima-1.0.0-dev.js} (100%) create mode 100644 test/3rdparty/esprima-2.5.0.js create mode 100644 test/compare-esprima2.js create mode 100644 test/compare-esprima2/export-default-declaration.expected.js create mode 100644 test/compare-esprima2/export-default-declaration.expected.min.js create mode 100644 test/compare-esprima2/export-default-declaration.js create mode 100644 test/compare-esprima2/import-with-default.expected.js create mode 100644 test/compare-esprima2/import-with-default.expected.min.js create mode 100644 test/compare-esprima2/import-with-default.js diff --git a/escodegen.js b/escodegen.js index 712b4d83..c6957763 100644 --- a/escodegen.js +++ b/escodegen.js @@ -1265,6 +1265,15 @@ return result; }, + ExportDefaultDeclaration: function (stmt, flags) { + stmt.default = true; + return this.ExportDeclaration(stmt, flags); + }, + + ExportNamedDeclaration: function (stmt, flags) { + return this.ExportDeclaration(stmt, flags); + }, + ExpressionStatement: function (stmt, flags) { var result, fragment; @@ -2236,13 +2245,14 @@ }, ImportDefaultSpecifier: function (expr, precedence, flags) { - return generateIdentifier(expr.id); + return generateIdentifier(expr.id || expr.local); }, ImportNamespaceSpecifier: function (expr, precedence, flags) { var result = ['*']; - if (expr.id) { - result.push(space + 'as' + noEmptySpace() + generateIdentifier(expr.id)); + var id = expr.id || expr.local; + if (id) { + result.push(space + 'as' + noEmptySpace() + generateIdentifier(id)); } return result; }, @@ -2252,7 +2262,7 @@ }, ExportSpecifier: function (expr, precedence, flags) { - var result = [ expr.id.name ]; + var result = [ (expr.id || expr.local).name ]; if (expr.name) { result.push(noEmptySpace() + 'as' + noEmptySpace() + generateIdentifier(expr.name)); } diff --git a/test/3rdparty/esprima.js b/test/3rdparty/esprima-1.0.0-dev.js similarity index 100% rename from test/3rdparty/esprima.js rename to test/3rdparty/esprima-1.0.0-dev.js diff --git a/test/3rdparty/esprima-2.5.0.js b/test/3rdparty/esprima-2.5.0.js new file mode 100644 index 00000000..ba07b067 --- /dev/null +++ b/test/3rdparty/esprima-2.5.0.js @@ -0,0 +1,5658 @@ +/* + Copyright (c) jQuery Foundation, Inc. and Contributors, All Rights Reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY + DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +(function (root, factory) { + 'use strict'; + + // Universal Module Definition (UMD) to support AMD, CommonJS/Node.js, + // Rhino, and plain browser loading. + + /* istanbul ignore next */ + if (typeof define === 'function' && define.amd) { + define(['exports'], factory); + } else if (typeof exports !== 'undefined') { + factory(exports); + } else { + factory((root.esprima = {})); + } +}(this, function (exports) { + 'use strict'; + + var Token, + TokenName, + FnExprTokens, + Syntax, + PlaceHolders, + Messages, + Regex, + source, + strict, + index, + lineNumber, + lineStart, + hasLineTerminator, + lastIndex, + lastLineNumber, + lastLineStart, + startIndex, + startLineNumber, + startLineStart, + scanning, + length, + lookahead, + state, + extra, + isBindingElement, + isAssignmentTarget, + firstCoverInitializedNameError; + + Token = { + BooleanLiteral: 1, + EOF: 2, + Identifier: 3, + Keyword: 4, + NullLiteral: 5, + NumericLiteral: 6, + Punctuator: 7, + StringLiteral: 8, + RegularExpression: 9, + Template: 10 + }; + + TokenName = {}; + TokenName[Token.BooleanLiteral] = 'Boolean'; + TokenName[Token.EOF] = ''; + TokenName[Token.Identifier] = 'Identifier'; + TokenName[Token.Keyword] = 'Keyword'; + TokenName[Token.NullLiteral] = 'Null'; + TokenName[Token.NumericLiteral] = 'Numeric'; + TokenName[Token.Punctuator] = 'Punctuator'; + TokenName[Token.StringLiteral] = 'String'; + TokenName[Token.RegularExpression] = 'RegularExpression'; + TokenName[Token.Template] = 'Template'; + + // A function following one of those tokens is an expression. + FnExprTokens = ['(', '{', '[', 'in', 'typeof', 'instanceof', 'new', + 'return', 'case', 'delete', 'throw', 'void', + // assignment operators + '=', '+=', '-=', '*=', '/=', '%=', '<<=', '>>=', '>>>=', + '&=', '|=', '^=', ',', + // binary/unary operators + '+', '-', '*', '/', '%', '++', '--', '<<', '>>', '>>>', '&', + '|', '^', '!', '~', '&&', '||', '?', ':', '===', '==', '>=', + '<=', '<', '>', '!=', '!==']; + + Syntax = { + AssignmentExpression: 'AssignmentExpression', + AssignmentPattern: 'AssignmentPattern', + ArrayExpression: 'ArrayExpression', + ArrayPattern: 'ArrayPattern', + ArrowFunctionExpression: 'ArrowFunctionExpression', + BlockStatement: 'BlockStatement', + BinaryExpression: 'BinaryExpression', + BreakStatement: 'BreakStatement', + CallExpression: 'CallExpression', + CatchClause: 'CatchClause', + ClassBody: 'ClassBody', + ClassDeclaration: 'ClassDeclaration', + ClassExpression: 'ClassExpression', + ConditionalExpression: 'ConditionalExpression', + ContinueStatement: 'ContinueStatement', + DoWhileStatement: 'DoWhileStatement', + DebuggerStatement: 'DebuggerStatement', + EmptyStatement: 'EmptyStatement', + ExportAllDeclaration: 'ExportAllDeclaration', + ExportDefaultDeclaration: 'ExportDefaultDeclaration', + ExportNamedDeclaration: 'ExportNamedDeclaration', + ExportSpecifier: 'ExportSpecifier', + ExpressionStatement: 'ExpressionStatement', + ForStatement: 'ForStatement', + ForOfStatement: 'ForOfStatement', + ForInStatement: 'ForInStatement', + FunctionDeclaration: 'FunctionDeclaration', + FunctionExpression: 'FunctionExpression', + Identifier: 'Identifier', + IfStatement: 'IfStatement', + ImportDeclaration: 'ImportDeclaration', + ImportDefaultSpecifier: 'ImportDefaultSpecifier', + ImportNamespaceSpecifier: 'ImportNamespaceSpecifier', + ImportSpecifier: 'ImportSpecifier', + Literal: 'Literal', + LabeledStatement: 'LabeledStatement', + LogicalExpression: 'LogicalExpression', + MemberExpression: 'MemberExpression', + MetaProperty: 'MetaProperty', + MethodDefinition: 'MethodDefinition', + NewExpression: 'NewExpression', + ObjectExpression: 'ObjectExpression', + ObjectPattern: 'ObjectPattern', + Program: 'Program', + Property: 'Property', + RestElement: 'RestElement', + ReturnStatement: 'ReturnStatement', + SequenceExpression: 'SequenceExpression', + SpreadElement: 'SpreadElement', + Super: 'Super', + SwitchCase: 'SwitchCase', + SwitchStatement: 'SwitchStatement', + TaggedTemplateExpression: 'TaggedTemplateExpression', + TemplateElement: 'TemplateElement', + TemplateLiteral: 'TemplateLiteral', + ThisExpression: 'ThisExpression', + ThrowStatement: 'ThrowStatement', + TryStatement: 'TryStatement', + UnaryExpression: 'UnaryExpression', + UpdateExpression: 'UpdateExpression', + VariableDeclaration: 'VariableDeclaration', + VariableDeclarator: 'VariableDeclarator', + WhileStatement: 'WhileStatement', + WithStatement: 'WithStatement', + YieldExpression: 'YieldExpression' + }; + + PlaceHolders = { + ArrowParameterPlaceHolder: 'ArrowParameterPlaceHolder' + }; + + // Error messages should be identical to V8. + Messages = { + UnexpectedToken: 'Unexpected token %0', + UnexpectedNumber: 'Unexpected number', + UnexpectedString: 'Unexpected string', + UnexpectedIdentifier: 'Unexpected identifier', + UnexpectedReserved: 'Unexpected reserved word', + UnexpectedTemplate: 'Unexpected quasi %0', + UnexpectedEOS: 'Unexpected end of input', + NewlineAfterThrow: 'Illegal newline after throw', + InvalidRegExp: 'Invalid regular expression', + UnterminatedRegExp: 'Invalid regular expression: missing /', + InvalidLHSInAssignment: 'Invalid left-hand side in assignment', + InvalidLHSInForIn: 'Invalid left-hand side in for-in', + InvalidLHSInForLoop: 'Invalid left-hand side in for-loop', + MultipleDefaultsInSwitch: 'More than one default clause in switch statement', + NoCatchOrFinally: 'Missing catch or finally after try', + UnknownLabel: 'Undefined label \'%0\'', + Redeclaration: '%0 \'%1\' has already been declared', + IllegalContinue: 'Illegal continue statement', + IllegalBreak: 'Illegal break statement', + IllegalReturn: 'Illegal return statement', + StrictModeWith: 'Strict mode code may not include a with statement', + StrictCatchVariable: 'Catch variable may not be eval or arguments in strict mode', + StrictVarName: 'Variable name may not be eval or arguments in strict mode', + StrictParamName: 'Parameter name eval or arguments is not allowed in strict mode', + StrictParamDupe: 'Strict mode function may not have duplicate parameter names', + StrictFunctionName: 'Function name may not be eval or arguments in strict mode', + StrictOctalLiteral: 'Octal literals are not allowed in strict mode.', + StrictDelete: 'Delete of an unqualified identifier in strict mode.', + StrictLHSAssignment: 'Assignment to eval or arguments is not allowed in strict mode', + StrictLHSPostfix: 'Postfix increment/decrement may not have eval or arguments operand in strict mode', + StrictLHSPrefix: 'Prefix increment/decrement may not have eval or arguments operand in strict mode', + StrictReservedWord: 'Use of future reserved word in strict mode', + TemplateOctalLiteral: 'Octal literals are not allowed in template strings.', + ParameterAfterRestParameter: 'Rest parameter must be last formal parameter', + DefaultRestParameter: 'Unexpected token =', + ObjectPatternAsRestParameter: 'Unexpected token {', + DuplicateProtoProperty: 'Duplicate __proto__ fields are not allowed in object literals', + ConstructorSpecialMethod: 'Class constructor may not be an accessor', + DuplicateConstructor: 'A class may only have one constructor', + StaticPrototype: 'Classes may not have static property named prototype', + MissingFromClause: 'Unexpected token', + NoAsAfterImportNamespace: 'Unexpected token', + InvalidModuleSpecifier: 'Unexpected token', + IllegalImportDeclaration: 'Unexpected token', + IllegalExportDeclaration: 'Unexpected token', + DuplicateBinding: 'Duplicate binding %0' + }; + + // See also tools/generate-unicode-regex.js. + Regex = { + // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierStart: + NonAsciiIdentifierStart: /[\xAA\xB5\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u052F\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA\u05F0-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u08A0-\u08B2\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09F0\u09F1\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D\u0C58\u0C59\u0C60\u0C61\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D60\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0EDC-\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1380-\u138F\u13A0-\u13F4\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u1820-\u1877\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191E\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19C1-\u19C7\u1A00-\u1A16\u1A20-\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\u1CE9-\u1CEC\u1CEE-\u1CF1\u1CF5\u1CF6\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2071\u207F\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2118-\u211D\u2124\u2126\u2128\u212A-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2160-\u2188\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303C\u3041-\u3096\u309B-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B\uA640-\uA66E\uA67F-\uA69D\uA6A0-\uA6EF\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA7AD\uA7B0\uA7B1\uA7F7-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF\uA9E0-\uA9E4\uA9E6-\uA9EF\uA9FA-\uA9FE\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA7E-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB5F\uAB64\uAB65\uABC0-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD40-\uDD74\uDE80-\uDE9C\uDEA0-\uDED0\uDF00-\uDF1F\uDF30-\uDF4A\uDF50-\uDF75\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDD00-\uDD27\uDD30-\uDD63\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC60-\uDC76\uDC80-\uDC9E\uDD00-\uDD15\uDD20-\uDD39\uDD80-\uDDB7\uDDBE\uDDBF\uDE00\uDE10-\uDE13\uDE15-\uDE17\uDE19-\uDE33\uDE60-\uDE7C\uDE80-\uDE9C\uDEC0-\uDEC7\uDEC9-\uDEE4\uDF00-\uDF35\uDF40-\uDF55\uDF60-\uDF72\uDF80-\uDF91]|\uD803[\uDC00-\uDC48]|\uD804[\uDC03-\uDC37\uDC83-\uDCAF\uDCD0-\uDCE8\uDD03-\uDD26\uDD50-\uDD72\uDD76\uDD83-\uDDB2\uDDC1-\uDDC4\uDDDA\uDE00-\uDE11\uDE13-\uDE2B\uDEB0-\uDEDE\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3D\uDF5D-\uDF61]|\uD805[\uDC80-\uDCAF\uDCC4\uDCC5\uDCC7\uDD80-\uDDAE\uDE00-\uDE2F\uDE44\uDE80-\uDEAA]|\uD806[\uDCA0-\uDCDF\uDCFF\uDEC0-\uDEF8]|\uD808[\uDC00-\uDF98]|\uD809[\uDC00-\uDC6E]|[\uD80C\uD840-\uD868\uD86A-\uD86C][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDED0-\uDEED\uDF00-\uDF2F\uDF40-\uDF43\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDF00-\uDF44\uDF50\uDF93-\uDF9F]|\uD82C[\uDC00\uDC01]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB]|\uD83A[\uDC00-\uDCC4]|\uD83B[\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD869[\uDC00-\uDED6\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D]|\uD87E[\uDC00-\uDE1D]/, + + // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierPart: + NonAsciiIdentifierPart: /[\xAA\xB5\xB7\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0300-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u0483-\u0487\u048A-\u052F\u0531-\u0556\u0559\u0561-\u0587\u0591-\u05BD\u05BF\u05C1\u05C2\u05C4\u05C5\u05C7\u05D0-\u05EA\u05F0-\u05F2\u0610-\u061A\u0620-\u0669\u066E-\u06D3\u06D5-\u06DC\u06DF-\u06E8\u06EA-\u06FC\u06FF\u0710-\u074A\u074D-\u07B1\u07C0-\u07F5\u07FA\u0800-\u082D\u0840-\u085B\u08A0-\u08B2\u08E4-\u0963\u0966-\u096F\u0971-\u0983\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BC-\u09C4\u09C7\u09C8\u09CB-\u09CE\u09D7\u09DC\u09DD\u09DF-\u09E3\u09E6-\u09F1\u0A01-\u0A03\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A3C\u0A3E-\u0A42\u0A47\u0A48\u0A4B-\u0A4D\u0A51\u0A59-\u0A5C\u0A5E\u0A66-\u0A75\u0A81-\u0A83\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABC-\u0AC5\u0AC7-\u0AC9\u0ACB-\u0ACD\u0AD0\u0AE0-\u0AE3\u0AE6-\u0AEF\u0B01-\u0B03\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3C-\u0B44\u0B47\u0B48\u0B4B-\u0B4D\u0B56\u0B57\u0B5C\u0B5D\u0B5F-\u0B63\u0B66-\u0B6F\u0B71\u0B82\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BBE-\u0BC2\u0BC6-\u0BC8\u0BCA-\u0BCD\u0BD0\u0BD7\u0BE6-\u0BEF\u0C00-\u0C03\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D-\u0C44\u0C46-\u0C48\u0C4A-\u0C4D\u0C55\u0C56\u0C58\u0C59\u0C60-\u0C63\u0C66-\u0C6F\u0C81-\u0C83\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBC-\u0CC4\u0CC6-\u0CC8\u0CCA-\u0CCD\u0CD5\u0CD6\u0CDE\u0CE0-\u0CE3\u0CE6-\u0CEF\u0CF1\u0CF2\u0D01-\u0D03\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D-\u0D44\u0D46-\u0D48\u0D4A-\u0D4E\u0D57\u0D60-\u0D63\u0D66-\u0D6F\u0D7A-\u0D7F\u0D82\u0D83\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0DCA\u0DCF-\u0DD4\u0DD6\u0DD8-\u0DDF\u0DE6-\u0DEF\u0DF2\u0DF3\u0E01-\u0E3A\u0E40-\u0E4E\u0E50-\u0E59\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB9\u0EBB-\u0EBD\u0EC0-\u0EC4\u0EC6\u0EC8-\u0ECD\u0ED0-\u0ED9\u0EDC-\u0EDF\u0F00\u0F18\u0F19\u0F20-\u0F29\u0F35\u0F37\u0F39\u0F3E-\u0F47\u0F49-\u0F6C\u0F71-\u0F84\u0F86-\u0F97\u0F99-\u0FBC\u0FC6\u1000-\u1049\u1050-\u109D\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u135D-\u135F\u1369-\u1371\u1380-\u138F\u13A0-\u13F4\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1714\u1720-\u1734\u1740-\u1753\u1760-\u176C\u176E-\u1770\u1772\u1773\u1780-\u17D3\u17D7\u17DC\u17DD\u17E0-\u17E9\u180B-\u180D\u1810-\u1819\u1820-\u1877\u1880-\u18AA\u18B0-\u18F5\u1900-\u191E\u1920-\u192B\u1930-\u193B\u1946-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u19D0-\u19DA\u1A00-\u1A1B\u1A20-\u1A5E\u1A60-\u1A7C\u1A7F-\u1A89\u1A90-\u1A99\u1AA7\u1AB0-\u1ABD\u1B00-\u1B4B\u1B50-\u1B59\u1B6B-\u1B73\u1B80-\u1BF3\u1C00-\u1C37\u1C40-\u1C49\u1C4D-\u1C7D\u1CD0-\u1CD2\u1CD4-\u1CF6\u1CF8\u1CF9\u1D00-\u1DF5\u1DFC-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u200C\u200D\u203F\u2040\u2054\u2071\u207F\u2090-\u209C\u20D0-\u20DC\u20E1\u20E5-\u20F0\u2102\u2107\u210A-\u2113\u2115\u2118-\u211D\u2124\u2126\u2128\u212A-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2160-\u2188\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D7F-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2DE0-\u2DFF\u3005-\u3007\u3021-\u302F\u3031-\u3035\u3038-\u303C\u3041-\u3096\u3099-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66F\uA674-\uA67D\uA67F-\uA69D\uA69F-\uA6F1\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA7AD\uA7B0\uA7B1\uA7F7-\uA827\uA840-\uA873\uA880-\uA8C4\uA8D0-\uA8D9\uA8E0-\uA8F7\uA8FB\uA900-\uA92D\uA930-\uA953\uA960-\uA97C\uA980-\uA9C0\uA9CF-\uA9D9\uA9E0-\uA9FE\uAA00-\uAA36\uAA40-\uAA4D\uAA50-\uAA59\uAA60-\uAA76\uAA7A-\uAAC2\uAADB-\uAADD\uAAE0-\uAAEF\uAAF2-\uAAF6\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB5F\uAB64\uAB65\uABC0-\uABEA\uABEC\uABED\uABF0-\uABF9\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE00-\uFE0F\uFE20-\uFE2D\uFE33\uFE34\uFE4D-\uFE4F\uFE70-\uFE74\uFE76-\uFEFC\uFF10-\uFF19\uFF21-\uFF3A\uFF3F\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD40-\uDD74\uDDFD\uDE80-\uDE9C\uDEA0-\uDED0\uDEE0\uDF00-\uDF1F\uDF30-\uDF4A\uDF50-\uDF7A\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDCA0-\uDCA9\uDD00-\uDD27\uDD30-\uDD63\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC60-\uDC76\uDC80-\uDC9E\uDD00-\uDD15\uDD20-\uDD39\uDD80-\uDDB7\uDDBE\uDDBF\uDE00-\uDE03\uDE05\uDE06\uDE0C-\uDE13\uDE15-\uDE17\uDE19-\uDE33\uDE38-\uDE3A\uDE3F\uDE60-\uDE7C\uDE80-\uDE9C\uDEC0-\uDEC7\uDEC9-\uDEE6\uDF00-\uDF35\uDF40-\uDF55\uDF60-\uDF72\uDF80-\uDF91]|\uD803[\uDC00-\uDC48]|\uD804[\uDC00-\uDC46\uDC66-\uDC6F\uDC7F-\uDCBA\uDCD0-\uDCE8\uDCF0-\uDCF9\uDD00-\uDD34\uDD36-\uDD3F\uDD50-\uDD73\uDD76\uDD80-\uDDC4\uDDD0-\uDDDA\uDE00-\uDE11\uDE13-\uDE37\uDEB0-\uDEEA\uDEF0-\uDEF9\uDF01-\uDF03\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3C-\uDF44\uDF47\uDF48\uDF4B-\uDF4D\uDF57\uDF5D-\uDF63\uDF66-\uDF6C\uDF70-\uDF74]|\uD805[\uDC80-\uDCC5\uDCC7\uDCD0-\uDCD9\uDD80-\uDDB5\uDDB8-\uDDC0\uDE00-\uDE40\uDE44\uDE50-\uDE59\uDE80-\uDEB7\uDEC0-\uDEC9]|\uD806[\uDCA0-\uDCE9\uDCFF\uDEC0-\uDEF8]|\uD808[\uDC00-\uDF98]|\uD809[\uDC00-\uDC6E]|[\uD80C\uD840-\uD868\uD86A-\uD86C][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDE60-\uDE69\uDED0-\uDEED\uDEF0-\uDEF4\uDF00-\uDF36\uDF40-\uDF43\uDF50-\uDF59\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDF00-\uDF44\uDF50-\uDF7E\uDF8F-\uDF9F]|\uD82C[\uDC00\uDC01]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99\uDC9D\uDC9E]|\uD834[\uDD65-\uDD69\uDD6D-\uDD72\uDD7B-\uDD82\uDD85-\uDD8B\uDDAA-\uDDAD\uDE42-\uDE44]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB\uDFCE-\uDFFF]|\uD83A[\uDC00-\uDCC4\uDCD0-\uDCD6]|\uD83B[\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD869[\uDC00-\uDED6\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D]|\uD87E[\uDC00-\uDE1D]|\uDB40[\uDD00-\uDDEF]/ + }; + + // Ensure the condition is true, otherwise throw an error. + // This is only to have a better contract semantic, i.e. another safety net + // to catch a logic error. The condition shall be fulfilled in normal case. + // Do NOT use this to enforce a certain condition on any user input. + + function assert(condition, message) { + /* istanbul ignore if */ + if (!condition) { + throw new Error('ASSERT: ' + message); + } + } + + function isDecimalDigit(ch) { + return (ch >= 0x30 && ch <= 0x39); // 0..9 + } + + function isHexDigit(ch) { + return '0123456789abcdefABCDEF'.indexOf(ch) >= 0; + } + + function isOctalDigit(ch) { + return '01234567'.indexOf(ch) >= 0; + } + + function octalToDecimal(ch) { + // \0 is not octal escape sequence + var octal = (ch !== '0'), code = '01234567'.indexOf(ch); + + if (index < length && isOctalDigit(source[index])) { + octal = true; + code = code * 8 + '01234567'.indexOf(source[index++]); + + // 3 digits are only allowed when string starts + // with 0, 1, 2, 3 + if ('0123'.indexOf(ch) >= 0 && + index < length && + isOctalDigit(source[index])) { + code = code * 8 + '01234567'.indexOf(source[index++]); + } + } + + return { + code: code, + octal: octal + }; + } + + // ECMA-262 11.2 White Space + + function isWhiteSpace(ch) { + return (ch === 0x20) || (ch === 0x09) || (ch === 0x0B) || (ch === 0x0C) || (ch === 0xA0) || + (ch >= 0x1680 && [0x1680, 0x180E, 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200A, 0x202F, 0x205F, 0x3000, 0xFEFF].indexOf(ch) >= 0); + } + + // ECMA-262 11.3 Line Terminators + + function isLineTerminator(ch) { + return (ch === 0x0A) || (ch === 0x0D) || (ch === 0x2028) || (ch === 0x2029); + } + + // ECMA-262 11.6 Identifier Names and Identifiers + + function fromCodePoint(cp) { + return (cp < 0x10000) ? String.fromCharCode(cp) : + String.fromCharCode(0xD800 + ((cp - 0x10000) >> 10)) + + String.fromCharCode(0xDC00 + ((cp - 0x10000) & 1023)); + } + + function isIdentifierStart(ch) { + return (ch === 0x24) || (ch === 0x5F) || // $ (dollar) and _ (underscore) + (ch >= 0x41 && ch <= 0x5A) || // A..Z + (ch >= 0x61 && ch <= 0x7A) || // a..z + (ch === 0x5C) || // \ (backslash) + ((ch >= 0x80) && Regex.NonAsciiIdentifierStart.test(fromCodePoint(ch))); + } + + function isIdentifierPart(ch) { + return (ch === 0x24) || (ch === 0x5F) || // $ (dollar) and _ (underscore) + (ch >= 0x41 && ch <= 0x5A) || // A..Z + (ch >= 0x61 && ch <= 0x7A) || // a..z + (ch >= 0x30 && ch <= 0x39) || // 0..9 + (ch === 0x5C) || // \ (backslash) + ((ch >= 0x80) && Regex.NonAsciiIdentifierPart.test(fromCodePoint(ch))); + } + + // ECMA-262 11.6.2.2 Future Reserved Words + + function isFutureReservedWord(id) { + switch (id) { + case 'enum': + case 'export': + case 'import': + case 'super': + return true; + default: + return false; + } + } + + function isStrictModeReservedWord(id) { + switch (id) { + case 'implements': + case 'interface': + case 'package': + case 'private': + case 'protected': + case 'public': + case 'static': + case 'yield': + case 'let': + return true; + default: + return false; + } + } + + function isRestrictedWord(id) { + return id === 'eval' || id === 'arguments'; + } + + // ECMA-262 11.6.2.1 Keywords + + function isKeyword(id) { + + // 'const' is specialized as Keyword in V8. + // 'yield' and 'let' are for compatibility with SpiderMonkey and ES.next. + // Some others are from future reserved words. + + switch (id.length) { + case 2: + return (id === 'if') || (id === 'in') || (id === 'do'); + case 3: + return (id === 'var') || (id === 'for') || (id === 'new') || + (id === 'try') || (id === 'let'); + case 4: + return (id === 'this') || (id === 'else') || (id === 'case') || + (id === 'void') || (id === 'with') || (id === 'enum'); + case 5: + return (id === 'while') || (id === 'break') || (id === 'catch') || + (id === 'throw') || (id === 'const') || (id === 'yield') || + (id === 'class') || (id === 'super'); + case 6: + return (id === 'return') || (id === 'typeof') || (id === 'delete') || + (id === 'switch') || (id === 'export') || (id === 'import'); + case 7: + return (id === 'default') || (id === 'finally') || (id === 'extends'); + case 8: + return (id === 'function') || (id === 'continue') || (id === 'debugger'); + case 10: + return (id === 'instanceof'); + default: + return false; + } + } + + // ECMA-262 11.4 Comments + + function addComment(type, value, start, end, loc) { + var comment; + + assert(typeof start === 'number', 'Comment must have valid position'); + + state.lastCommentStart = start; + + comment = { + type: type, + value: value + }; + if (extra.range) { + comment.range = [start, end]; + } + if (extra.loc) { + comment.loc = loc; + } + extra.comments.push(comment); + if (extra.attachComment) { + extra.leadingComments.push(comment); + extra.trailingComments.push(comment); + } + } + + function skipSingleLineComment(offset) { + var start, loc, ch, comment; + + start = index - offset; + loc = { + start: { + line: lineNumber, + column: index - lineStart - offset + } + }; + + while (index < length) { + ch = source.charCodeAt(index); + ++index; + if (isLineTerminator(ch)) { + hasLineTerminator = true; + if (extra.comments) { + comment = source.slice(start + offset, index - 1); + loc.end = { + line: lineNumber, + column: index - lineStart - 1 + }; + addComment('Line', comment, start, index - 1, loc); + } + if (ch === 13 && source.charCodeAt(index) === 10) { + ++index; + } + ++lineNumber; + lineStart = index; + return; + } + } + + if (extra.comments) { + comment = source.slice(start + offset, index); + loc.end = { + line: lineNumber, + column: index - lineStart + }; + addComment('Line', comment, start, index, loc); + } + } + + function skipMultiLineComment() { + var start, loc, ch, comment; + + if (extra.comments) { + start = index - 2; + loc = { + start: { + line: lineNumber, + column: index - lineStart - 2 + } + }; + } + + while (index < length) { + ch = source.charCodeAt(index); + if (isLineTerminator(ch)) { + if (ch === 0x0D && source.charCodeAt(index + 1) === 0x0A) { + ++index; + } + hasLineTerminator = true; + ++lineNumber; + ++index; + lineStart = index; + } else if (ch === 0x2A) { + // Block comment ends with '*/'. + if (source.charCodeAt(index + 1) === 0x2F) { + ++index; + ++index; + if (extra.comments) { + comment = source.slice(start + 2, index - 2); + loc.end = { + line: lineNumber, + column: index - lineStart + }; + addComment('Block', comment, start, index, loc); + } + return; + } + ++index; + } else { + ++index; + } + } + + // Ran off the end of the file - the whole thing is a comment + if (extra.comments) { + loc.end = { + line: lineNumber, + column: index - lineStart + }; + comment = source.slice(start + 2, index); + addComment('Block', comment, start, index, loc); + } + tolerateUnexpectedToken(); + } + + function skipComment() { + var ch, start; + hasLineTerminator = false; + + start = (index === 0); + while (index < length) { + ch = source.charCodeAt(index); + + if (isWhiteSpace(ch)) { + ++index; + } else if (isLineTerminator(ch)) { + hasLineTerminator = true; + ++index; + if (ch === 0x0D && source.charCodeAt(index) === 0x0A) { + ++index; + } + ++lineNumber; + lineStart = index; + start = true; + } else if (ch === 0x2F) { // U+002F is '/' + ch = source.charCodeAt(index + 1); + if (ch === 0x2F) { + ++index; + ++index; + skipSingleLineComment(2); + start = true; + } else if (ch === 0x2A) { // U+002A is '*' + ++index; + ++index; + skipMultiLineComment(); + } else { + break; + } + } else if (start && ch === 0x2D) { // U+002D is '-' + // U+003E is '>' + if ((source.charCodeAt(index + 1) === 0x2D) && (source.charCodeAt(index + 2) === 0x3E)) { + // '-->' is a single-line comment + index += 3; + skipSingleLineComment(3); + } else { + break; + } + } else if (ch === 0x3C) { // U+003C is '<' + if (source.slice(index + 1, index + 4) === '!--') { + ++index; // `<` + ++index; // `!` + ++index; // `-` + ++index; // `-` + skipSingleLineComment(4); + } else { + break; + } + } else { + break; + } + } + } + + function scanHexEscape(prefix) { + var i, len, ch, code = 0; + + len = (prefix === 'u') ? 4 : 2; + for (i = 0; i < len; ++i) { + if (index < length && isHexDigit(source[index])) { + ch = source[index++]; + code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase()); + } else { + return ''; + } + } + return String.fromCharCode(code); + } + + function scanUnicodeCodePointEscape() { + var ch, code; + + ch = source[index]; + code = 0; + + // At least, one hex digit is required. + if (ch === '}') { + throwUnexpectedToken(); + } + + while (index < length) { + ch = source[index++]; + if (!isHexDigit(ch)) { + break; + } + code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase()); + } + + if (code > 0x10FFFF || ch !== '}') { + throwUnexpectedToken(); + } + + return fromCodePoint(code); + } + + function codePointAt(i) { + var cp, first, second; + + cp = source.charCodeAt(i); + if (cp >= 0xD800 && cp <= 0xDBFF) { + second = source.charCodeAt(i + 1); + if (second >= 0xDC00 && second <= 0xDFFF) { + first = cp; + cp = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000; + } + } + + return cp; + } + + function getComplexIdentifier() { + var cp, ch, id; + + cp = codePointAt(index); + id = fromCodePoint(cp); + index += id.length; + + // '\u' (U+005C, U+0075) denotes an escaped character. + if (cp === 0x5C) { + if (source.charCodeAt(index) !== 0x75) { + throwUnexpectedToken(); + } + ++index; + if (source[index] === '{') { + ++index; + ch = scanUnicodeCodePointEscape(); + } else { + ch = scanHexEscape('u'); + cp = ch.charCodeAt(0); + if (!ch || ch === '\\' || !isIdentifierStart(cp)) { + throwUnexpectedToken(); + } + } + id = ch; + } + + while (index < length) { + cp = codePointAt(index); + if (!isIdentifierPart(cp)) { + break; + } + ch = fromCodePoint(cp); + id += ch; + index += ch.length; + + // '\u' (U+005C, U+0075) denotes an escaped character. + if (cp === 0x5C) { + id = id.substr(0, id.length - 1); + if (source.charCodeAt(index) !== 0x75) { + throwUnexpectedToken(); + } + ++index; + if (source[index] === '{') { + ++index; + ch = scanUnicodeCodePointEscape(); + } else { + ch = scanHexEscape('u'); + cp = ch.charCodeAt(0); + if (!ch || ch === '\\' || !isIdentifierPart(cp)) { + throwUnexpectedToken(); + } + } + id += ch; + } + } + + return id; + } + + function getIdentifier() { + var start, ch; + + start = index++; + while (index < length) { + ch = source.charCodeAt(index); + if (ch === 0x5C) { + // Blackslash (U+005C) marks Unicode escape sequence. + index = start; + return getComplexIdentifier(); + } else if (ch >= 0xD800 && ch < 0xDFFF) { + // Need to handle surrogate pairs. + index = start; + return getComplexIdentifier(); + } + if (isIdentifierPart(ch)) { + ++index; + } else { + break; + } + } + + return source.slice(start, index); + } + + function scanIdentifier() { + var start, id, type; + + start = index; + + // Backslash (U+005C) starts an escaped character. + id = (source.charCodeAt(index) === 0x5C) ? getComplexIdentifier() : getIdentifier(); + + // There is no keyword or literal with only one character. + // Thus, it must be an identifier. + if (id.length === 1) { + type = Token.Identifier; + } else if (isKeyword(id)) { + type = Token.Keyword; + } else if (id === 'null') { + type = Token.NullLiteral; + } else if (id === 'true' || id === 'false') { + type = Token.BooleanLiteral; + } else { + type = Token.Identifier; + } + + return { + type: type, + value: id, + lineNumber: lineNumber, + lineStart: lineStart, + start: start, + end: index + }; + } + + + // ECMA-262 11.7 Punctuators + + function scanPunctuator() { + var token, str; + + token = { + type: Token.Punctuator, + value: '', + lineNumber: lineNumber, + lineStart: lineStart, + start: index, + end: index + }; + + // Check for most common single-character punctuators. + str = source[index]; + switch (str) { + + case '(': + if (extra.tokenize) { + extra.openParenToken = extra.tokens.length; + } + ++index; + break; + + case '{': + if (extra.tokenize) { + extra.openCurlyToken = extra.tokens.length; + } + state.curlyStack.push('{'); + ++index; + break; + + case '.': + ++index; + if (source[index] === '.' && source[index + 1] === '.') { + // Spread operator: ... + index += 2; + str = '...'; + } + break; + + case '}': + ++index; + state.curlyStack.pop(); + break; + case ')': + case ';': + case ',': + case '[': + case ']': + case ':': + case '?': + case '~': + ++index; + break; + + default: + // 4-character punctuator. + str = source.substr(index, 4); + if (str === '>>>=') { + index += 4; + } else { + + // 3-character punctuators. + str = str.substr(0, 3); + if (str === '===' || str === '!==' || str === '>>>' || + str === '<<=' || str === '>>=') { + index += 3; + } else { + + // 2-character punctuators. + str = str.substr(0, 2); + if (str === '&&' || str === '||' || str === '==' || str === '!=' || + str === '+=' || str === '-=' || str === '*=' || str === '/=' || + str === '++' || str === '--' || str === '<<' || str === '>>' || + str === '&=' || str === '|=' || str === '^=' || str === '%=' || + str === '<=' || str === '>=' || str === '=>') { + index += 2; + } else { + + // 1-character punctuators. + str = source[index]; + if ('<>=!+-*%&|^/'.indexOf(str) >= 0) { + ++index; + } + } + } + } + } + + if (index === token.start) { + throwUnexpectedToken(); + } + + token.end = index; + token.value = str; + return token; + } + + // ECMA-262 11.8.3 Numeric Literals + + function scanHexLiteral(start) { + var number = ''; + + while (index < length) { + if (!isHexDigit(source[index])) { + break; + } + number += source[index++]; + } + + if (number.length === 0) { + throwUnexpectedToken(); + } + + if (isIdentifierStart(source.charCodeAt(index))) { + throwUnexpectedToken(); + } + + return { + type: Token.NumericLiteral, + value: parseInt('0x' + number, 16), + lineNumber: lineNumber, + lineStart: lineStart, + start: start, + end: index + }; + } + + function scanBinaryLiteral(start) { + var ch, number; + + number = ''; + + while (index < length) { + ch = source[index]; + if (ch !== '0' && ch !== '1') { + break; + } + number += source[index++]; + } + + if (number.length === 0) { + // only 0b or 0B + throwUnexpectedToken(); + } + + if (index < length) { + ch = source.charCodeAt(index); + /* istanbul ignore else */ + if (isIdentifierStart(ch) || isDecimalDigit(ch)) { + throwUnexpectedToken(); + } + } + + return { + type: Token.NumericLiteral, + value: parseInt(number, 2), + lineNumber: lineNumber, + lineStart: lineStart, + start: start, + end: index + }; + } + + function scanOctalLiteral(prefix, start) { + var number, octal; + + if (isOctalDigit(prefix)) { + octal = true; + number = '0' + source[index++]; + } else { + octal = false; + ++index; + number = ''; + } + + while (index < length) { + if (!isOctalDigit(source[index])) { + break; + } + number += source[index++]; + } + + if (!octal && number.length === 0) { + // only 0o or 0O + throwUnexpectedToken(); + } + + if (isIdentifierStart(source.charCodeAt(index)) || isDecimalDigit(source.charCodeAt(index))) { + throwUnexpectedToken(); + } + + return { + type: Token.NumericLiteral, + value: parseInt(number, 8), + octal: octal, + lineNumber: lineNumber, + lineStart: lineStart, + start: start, + end: index + }; + } + + function isImplicitOctalLiteral() { + var i, ch; + + // Implicit octal, unless there is a non-octal digit. + // (Annex B.1.1 on Numeric Literals) + for (i = index + 1; i < length; ++i) { + ch = source[i]; + if (ch === '8' || ch === '9') { + return false; + } + if (!isOctalDigit(ch)) { + return true; + } + } + + return true; + } + + function scanNumericLiteral() { + var number, start, ch; + + ch = source[index]; + assert(isDecimalDigit(ch.charCodeAt(0)) || (ch === '.'), + 'Numeric literal must start with a decimal digit or a decimal point'); + + start = index; + number = ''; + if (ch !== '.') { + number = source[index++]; + ch = source[index]; + + // Hex number starts with '0x'. + // Octal number starts with '0'. + // Octal number in ES6 starts with '0o'. + // Binary number in ES6 starts with '0b'. + if (number === '0') { + if (ch === 'x' || ch === 'X') { + ++index; + return scanHexLiteral(start); + } + if (ch === 'b' || ch === 'B') { + ++index; + return scanBinaryLiteral(start); + } + if (ch === 'o' || ch === 'O') { + return scanOctalLiteral(ch, start); + } + + if (isOctalDigit(ch)) { + if (isImplicitOctalLiteral()) { + return scanOctalLiteral(ch, start); + } + } + } + + while (isDecimalDigit(source.charCodeAt(index))) { + number += source[index++]; + } + ch = source[index]; + } + + if (ch === '.') { + number += source[index++]; + while (isDecimalDigit(source.charCodeAt(index))) { + number += source[index++]; + } + ch = source[index]; + } + + if (ch === 'e' || ch === 'E') { + number += source[index++]; + + ch = source[index]; + if (ch === '+' || ch === '-') { + number += source[index++]; + } + if (isDecimalDigit(source.charCodeAt(index))) { + while (isDecimalDigit(source.charCodeAt(index))) { + number += source[index++]; + } + } else { + throwUnexpectedToken(); + } + } + + if (isIdentifierStart(source.charCodeAt(index))) { + throwUnexpectedToken(); + } + + return { + type: Token.NumericLiteral, + value: parseFloat(number), + lineNumber: lineNumber, + lineStart: lineStart, + start: start, + end: index + }; + } + + // ECMA-262 11.8.4 String Literals + + function scanStringLiteral() { + var str = '', quote, start, ch, unescaped, octToDec, octal = false; + + quote = source[index]; + assert((quote === '\'' || quote === '"'), + 'String literal must starts with a quote'); + + start = index; + ++index; + + while (index < length) { + ch = source[index++]; + + if (ch === quote) { + quote = ''; + break; + } else if (ch === '\\') { + ch = source[index++]; + if (!ch || !isLineTerminator(ch.charCodeAt(0))) { + switch (ch) { + case 'u': + case 'x': + if (source[index] === '{') { + ++index; + str += scanUnicodeCodePointEscape(); + } else { + unescaped = scanHexEscape(ch); + if (!unescaped) { + throw throwUnexpectedToken(); + } + str += unescaped; + } + break; + case 'n': + str += '\n'; + break; + case 'r': + str += '\r'; + break; + case 't': + str += '\t'; + break; + case 'b': + str += '\b'; + break; + case 'f': + str += '\f'; + break; + case 'v': + str += '\x0B'; + break; + case '8': + case '9': + str += ch; + tolerateUnexpectedToken(); + break; + + default: + if (isOctalDigit(ch)) { + octToDec = octalToDecimal(ch); + + octal = octToDec.octal || octal; + str += String.fromCharCode(octToDec.code); + } else { + str += ch; + } + break; + } + } else { + ++lineNumber; + if (ch === '\r' && source[index] === '\n') { + ++index; + } + lineStart = index; + } + } else if (isLineTerminator(ch.charCodeAt(0))) { + break; + } else { + str += ch; + } + } + + if (quote !== '') { + throwUnexpectedToken(); + } + + return { + type: Token.StringLiteral, + value: str, + octal: octal, + lineNumber: startLineNumber, + lineStart: startLineStart, + start: start, + end: index + }; + } + + // ECMA-262 11.8.6 Template Literal Lexical Components + + function scanTemplate() { + var cooked = '', ch, start, rawOffset, terminated, head, tail, restore, unescaped; + + terminated = false; + tail = false; + start = index; + head = (source[index] === '`'); + rawOffset = 2; + + ++index; + + while (index < length) { + ch = source[index++]; + if (ch === '`') { + rawOffset = 1; + tail = true; + terminated = true; + break; + } else if (ch === '$') { + if (source[index] === '{') { + state.curlyStack.push('${'); + ++index; + terminated = true; + break; + } + cooked += ch; + } else if (ch === '\\') { + ch = source[index++]; + if (!isLineTerminator(ch.charCodeAt(0))) { + switch (ch) { + case 'n': + cooked += '\n'; + break; + case 'r': + cooked += '\r'; + break; + case 't': + cooked += '\t'; + break; + case 'u': + case 'x': + if (source[index] === '{') { + ++index; + cooked += scanUnicodeCodePointEscape(); + } else { + restore = index; + unescaped = scanHexEscape(ch); + if (unescaped) { + cooked += unescaped; + } else { + index = restore; + cooked += ch; + } + } + break; + case 'b': + cooked += '\b'; + break; + case 'f': + cooked += '\f'; + break; + case 'v': + cooked += '\v'; + break; + + default: + if (ch === '0') { + if (isDecimalDigit(source.charCodeAt(index))) { + // Illegal: \01 \02 and so on + throwError(Messages.TemplateOctalLiteral); + } + cooked += '\0'; + } else if (isOctalDigit(ch)) { + // Illegal: \1 \2 + throwError(Messages.TemplateOctalLiteral); + } else { + cooked += ch; + } + break; + } + } else { + ++lineNumber; + if (ch === '\r' && source[index] === '\n') { + ++index; + } + lineStart = index; + } + } else if (isLineTerminator(ch.charCodeAt(0))) { + ++lineNumber; + if (ch === '\r' && source[index] === '\n') { + ++index; + } + lineStart = index; + cooked += '\n'; + } else { + cooked += ch; + } + } + + if (!terminated) { + throwUnexpectedToken(); + } + + if (!head) { + state.curlyStack.pop(); + } + + return { + type: Token.Template, + value: { + cooked: cooked, + raw: source.slice(start + 1, index - rawOffset) + }, + head: head, + tail: tail, + lineNumber: lineNumber, + lineStart: lineStart, + start: start, + end: index + }; + } + + // ECMA-262 11.8.5 Regular Expression Literals + + function testRegExp(pattern, flags) { + // The BMP character to use as a replacement for astral symbols when + // translating an ES6 "u"-flagged pattern to an ES5-compatible + // approximation. + // Note: replacing with '\uFFFF' enables false positives in unlikely + // scenarios. For example, `[\u{1044f}-\u{10440}]` is an invalid + // pattern that would not be detected by this substitution. + var astralSubstitute = '\uFFFF', + tmp = pattern; + + if (flags.indexOf('u') >= 0) { + tmp = tmp + // Replace every Unicode escape sequence with the equivalent + // BMP character or a constant ASCII code point in the case of + // astral symbols. (See the above note on `astralSubstitute` + // for more information.) + .replace(/\\u\{([0-9a-fA-F]+)\}|\\u([a-fA-F0-9]{4})/g, function ($0, $1, $2) { + var codePoint = parseInt($1 || $2, 16); + if (codePoint > 0x10FFFF) { + throwUnexpectedToken(null, Messages.InvalidRegExp); + } + if (codePoint <= 0xFFFF) { + return String.fromCharCode(codePoint); + } + return astralSubstitute; + }) + // Replace each paired surrogate with a single ASCII symbol to + // avoid throwing on regular expressions that are only valid in + // combination with the "u" flag. + .replace( + /[\uD800-\uDBFF][\uDC00-\uDFFF]/g, + astralSubstitute + ); + } + + // First, detect invalid regular expressions. + try { + RegExp(tmp); + } catch (e) { + throwUnexpectedToken(null, Messages.InvalidRegExp); + } + + // Return a regular expression object for this pattern-flag pair, or + // `null` in case the current environment doesn't support the flags it + // uses. + try { + return new RegExp(pattern, flags); + } catch (exception) { + return null; + } + } + + function scanRegExpBody() { + var ch, str, classMarker, terminated, body; + + ch = source[index]; + assert(ch === '/', 'Regular expression literal must start with a slash'); + str = source[index++]; + + classMarker = false; + terminated = false; + while (index < length) { + ch = source[index++]; + str += ch; + if (ch === '\\') { + ch = source[index++]; + // ECMA-262 7.8.5 + if (isLineTerminator(ch.charCodeAt(0))) { + throwUnexpectedToken(null, Messages.UnterminatedRegExp); + } + str += ch; + } else if (isLineTerminator(ch.charCodeAt(0))) { + throwUnexpectedToken(null, Messages.UnterminatedRegExp); + } else if (classMarker) { + if (ch === ']') { + classMarker = false; + } + } else { + if (ch === '/') { + terminated = true; + break; + } else if (ch === '[') { + classMarker = true; + } + } + } + + if (!terminated) { + throwUnexpectedToken(null, Messages.UnterminatedRegExp); + } + + // Exclude leading and trailing slash. + body = str.substr(1, str.length - 2); + return { + value: body, + literal: str + }; + } + + function scanRegExpFlags() { + var ch, str, flags, restore; + + str = ''; + flags = ''; + while (index < length) { + ch = source[index]; + if (!isIdentifierPart(ch.charCodeAt(0))) { + break; + } + + ++index; + if (ch === '\\' && index < length) { + ch = source[index]; + if (ch === 'u') { + ++index; + restore = index; + ch = scanHexEscape('u'); + if (ch) { + flags += ch; + for (str += '\\u'; restore < index; ++restore) { + str += source[restore]; + } + } else { + index = restore; + flags += 'u'; + str += '\\u'; + } + tolerateUnexpectedToken(); + } else { + str += '\\'; + tolerateUnexpectedToken(); + } + } else { + flags += ch; + str += ch; + } + } + + return { + value: flags, + literal: str + }; + } + + function scanRegExp() { + var start, body, flags, value; + scanning = true; + + lookahead = null; + skipComment(); + start = index; + + body = scanRegExpBody(); + flags = scanRegExpFlags(); + value = testRegExp(body.value, flags.value); + scanning = false; + if (extra.tokenize) { + return { + type: Token.RegularExpression, + value: value, + regex: { + pattern: body.value, + flags: flags.value + }, + lineNumber: lineNumber, + lineStart: lineStart, + start: start, + end: index + }; + } + + return { + literal: body.literal + flags.literal, + value: value, + regex: { + pattern: body.value, + flags: flags.value + }, + start: start, + end: index + }; + } + + function collectRegex() { + var pos, loc, regex, token; + + skipComment(); + + pos = index; + loc = { + start: { + line: lineNumber, + column: index - lineStart + } + }; + + regex = scanRegExp(); + + loc.end = { + line: lineNumber, + column: index - lineStart + }; + + /* istanbul ignore next */ + if (!extra.tokenize) { + // Pop the previous token, which is likely '/' or '/=' + if (extra.tokens.length > 0) { + token = extra.tokens[extra.tokens.length - 1]; + if (token.range[0] === pos && token.type === 'Punctuator') { + if (token.value === '/' || token.value === '/=') { + extra.tokens.pop(); + } + } + } + + extra.tokens.push({ + type: 'RegularExpression', + value: regex.literal, + regex: regex.regex, + range: [pos, index], + loc: loc + }); + } + + return regex; + } + + function isIdentifierName(token) { + return token.type === Token.Identifier || + token.type === Token.Keyword || + token.type === Token.BooleanLiteral || + token.type === Token.NullLiteral; + } + + function advanceSlash() { + var prevToken, + checkToken; + // Using the following algorithm: + // https://github.com/mozilla/sweet.js/wiki/design + prevToken = extra.tokens[extra.tokens.length - 1]; + if (!prevToken) { + // Nothing before that: it cannot be a division. + return collectRegex(); + } + if (prevToken.type === 'Punctuator') { + if (prevToken.value === ']') { + return scanPunctuator(); + } + if (prevToken.value === ')') { + checkToken = extra.tokens[extra.openParenToken - 1]; + if (checkToken && + checkToken.type === 'Keyword' && + (checkToken.value === 'if' || + checkToken.value === 'while' || + checkToken.value === 'for' || + checkToken.value === 'with')) { + return collectRegex(); + } + return scanPunctuator(); + } + if (prevToken.value === '}') { + // Dividing a function by anything makes little sense, + // but we have to check for that. + if (extra.tokens[extra.openCurlyToken - 3] && + extra.tokens[extra.openCurlyToken - 3].type === 'Keyword') { + // Anonymous function. + checkToken = extra.tokens[extra.openCurlyToken - 4]; + if (!checkToken) { + return scanPunctuator(); + } + } else if (extra.tokens[extra.openCurlyToken - 4] && + extra.tokens[extra.openCurlyToken - 4].type === 'Keyword') { + // Named function. + checkToken = extra.tokens[extra.openCurlyToken - 5]; + if (!checkToken) { + return collectRegex(); + } + } else { + return scanPunctuator(); + } + // checkToken determines whether the function is + // a declaration or an expression. + if (FnExprTokens.indexOf(checkToken.value) >= 0) { + // It is an expression. + return scanPunctuator(); + } + // It is a declaration. + return collectRegex(); + } + return collectRegex(); + } + if (prevToken.type === 'Keyword' && prevToken.value !== 'this') { + return collectRegex(); + } + return scanPunctuator(); + } + + function advance() { + var cp, token; + + if (index >= length) { + return { + type: Token.EOF, + lineNumber: lineNumber, + lineStart: lineStart, + start: index, + end: index + }; + } + + cp = source.charCodeAt(index); + + if (isIdentifierStart(cp)) { + token = scanIdentifier(); + if (strict && isStrictModeReservedWord(token.value)) { + token.type = Token.Keyword; + } + return token; + } + + // Very common: ( and ) and ; + if (cp === 0x28 || cp === 0x29 || cp === 0x3B) { + return scanPunctuator(); + } + + // String literal starts with single quote (U+0027) or double quote (U+0022). + if (cp === 0x27 || cp === 0x22) { + return scanStringLiteral(); + } + + // Dot (.) U+002E can also start a floating-point number, hence the need + // to check the next character. + if (cp === 0x2E) { + if (isDecimalDigit(source.charCodeAt(index + 1))) { + return scanNumericLiteral(); + } + return scanPunctuator(); + } + + if (isDecimalDigit(cp)) { + return scanNumericLiteral(); + } + + // Slash (/) U+002F can also start a regex. + if (extra.tokenize && cp === 0x2F) { + return advanceSlash(); + } + + // Template literals start with ` (U+0060) for template head + // or } (U+007D) for template middle or template tail. + if (cp === 0x60 || (cp === 0x7D && state.curlyStack[state.curlyStack.length - 1] === '${')) { + return scanTemplate(); + } + + // Possible identifier start in a surrogate pair. + if (cp >= 0xD800 && cp < 0xDFFF) { + cp = codePointAt(index); + if (isIdentifierStart(cp)) { + return scanIdentifier(); + } + } + + return scanPunctuator(); + } + + function collectToken() { + var loc, token, value, entry; + + loc = { + start: { + line: lineNumber, + column: index - lineStart + } + }; + + token = advance(); + loc.end = { + line: lineNumber, + column: index - lineStart + }; + + if (token.type !== Token.EOF) { + value = source.slice(token.start, token.end); + entry = { + type: TokenName[token.type], + value: value, + range: [token.start, token.end], + loc: loc + }; + if (token.regex) { + entry.regex = { + pattern: token.regex.pattern, + flags: token.regex.flags + }; + } + extra.tokens.push(entry); + } + + return token; + } + + function lex() { + var token; + scanning = true; + + lastIndex = index; + lastLineNumber = lineNumber; + lastLineStart = lineStart; + + skipComment(); + + token = lookahead; + + startIndex = index; + startLineNumber = lineNumber; + startLineStart = lineStart; + + lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance(); + scanning = false; + return token; + } + + function peek() { + scanning = true; + + skipComment(); + + lastIndex = index; + lastLineNumber = lineNumber; + lastLineStart = lineStart; + + startIndex = index; + startLineNumber = lineNumber; + startLineStart = lineStart; + + lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance(); + scanning = false; + } + + function Position() { + this.line = startLineNumber; + this.column = startIndex - startLineStart; + } + + function SourceLocation() { + this.start = new Position(); + this.end = null; + } + + function WrappingSourceLocation(startToken) { + this.start = { + line: startToken.lineNumber, + column: startToken.start - startToken.lineStart + }; + this.end = null; + } + + function Node() { + if (extra.range) { + this.range = [startIndex, 0]; + } + if (extra.loc) { + this.loc = new SourceLocation(); + } + } + + function WrappingNode(startToken) { + if (extra.range) { + this.range = [startToken.start, 0]; + } + if (extra.loc) { + this.loc = new WrappingSourceLocation(startToken); + } + } + + WrappingNode.prototype = Node.prototype = { + + processComment: function () { + var lastChild, + leadingComments, + trailingComments, + bottomRight = extra.bottomRightStack, + i, + comment, + last = bottomRight[bottomRight.length - 1]; + + if (this.type === Syntax.Program) { + if (this.body.length > 0) { + return; + } + } + + if (extra.trailingComments.length > 0) { + trailingComments = []; + for (i = extra.trailingComments.length - 1; i >= 0; --i) { + comment = extra.trailingComments[i]; + if (comment.range[0] >= this.range[1]) { + trailingComments.unshift(comment); + extra.trailingComments.splice(i, 1); + } + } + extra.trailingComments = []; + } else { + if (last && last.trailingComments && last.trailingComments[0].range[0] >= this.range[1]) { + trailingComments = last.trailingComments; + delete last.trailingComments; + } + } + + // Eating the stack. + while (last && last.range[0] >= this.range[0]) { + lastChild = bottomRight.pop(); + last = bottomRight[bottomRight.length - 1]; + } + + if (lastChild) { + if (lastChild.leadingComments) { + leadingComments = []; + for (i = lastChild.leadingComments.length - 1; i >= 0; --i) { + comment = lastChild.leadingComments[i]; + if (comment.range[1] <= this.range[0]) { + leadingComments.unshift(comment); + lastChild.leadingComments.splice(i, 1); + } + } + + if (!lastChild.leadingComments.length) { + lastChild.leadingComments = undefined; + } + } + } else if (extra.leadingComments.length > 0) { + leadingComments = []; + for (i = extra.leadingComments.length - 1; i >= 0; --i) { + comment = extra.leadingComments[i]; + if (comment.range[1] <= this.range[0]) { + leadingComments.unshift(comment); + extra.leadingComments.splice(i, 1); + } + } + } + + + if (leadingComments && leadingComments.length > 0) { + this.leadingComments = leadingComments; + } + if (trailingComments && trailingComments.length > 0) { + this.trailingComments = trailingComments; + } + + bottomRight.push(this); + }, + + finish: function () { + if (extra.range) { + this.range[1] = lastIndex; + } + if (extra.loc) { + this.loc.end = { + line: lastLineNumber, + column: lastIndex - lastLineStart + }; + if (extra.source) { + this.loc.source = extra.source; + } + } + + if (extra.attachComment) { + this.processComment(); + } + }, + + finishArrayExpression: function (elements) { + this.type = Syntax.ArrayExpression; + this.elements = elements; + this.finish(); + return this; + }, + + finishArrayPattern: function (elements) { + this.type = Syntax.ArrayPattern; + this.elements = elements; + this.finish(); + return this; + }, + + finishArrowFunctionExpression: function (params, defaults, body, expression) { + this.type = Syntax.ArrowFunctionExpression; + this.id = null; + this.params = params; + this.defaults = defaults; + this.body = body; + this.generator = false; + this.expression = expression; + this.finish(); + return this; + }, + + finishAssignmentExpression: function (operator, left, right) { + this.type = Syntax.AssignmentExpression; + this.operator = operator; + this.left = left; + this.right = right; + this.finish(); + return this; + }, + + finishAssignmentPattern: function (left, right) { + this.type = Syntax.AssignmentPattern; + this.left = left; + this.right = right; + this.finish(); + return this; + }, + + finishBinaryExpression: function (operator, left, right) { + this.type = (operator === '||' || operator === '&&') ? Syntax.LogicalExpression : Syntax.BinaryExpression; + this.operator = operator; + this.left = left; + this.right = right; + this.finish(); + return this; + }, + + finishBlockStatement: function (body) { + this.type = Syntax.BlockStatement; + this.body = body; + this.finish(); + return this; + }, + + finishBreakStatement: function (label) { + this.type = Syntax.BreakStatement; + this.label = label; + this.finish(); + return this; + }, + + finishCallExpression: function (callee, args) { + this.type = Syntax.CallExpression; + this.callee = callee; + this.arguments = args; + this.finish(); + return this; + }, + + finishCatchClause: function (param, body) { + this.type = Syntax.CatchClause; + this.param = param; + this.body = body; + this.finish(); + return this; + }, + + finishClassBody: function (body) { + this.type = Syntax.ClassBody; + this.body = body; + this.finish(); + return this; + }, + + finishClassDeclaration: function (id, superClass, body) { + this.type = Syntax.ClassDeclaration; + this.id = id; + this.superClass = superClass; + this.body = body; + this.finish(); + return this; + }, + + finishClassExpression: function (id, superClass, body) { + this.type = Syntax.ClassExpression; + this.id = id; + this.superClass = superClass; + this.body = body; + this.finish(); + return this; + }, + + finishConditionalExpression: function (test, consequent, alternate) { + this.type = Syntax.ConditionalExpression; + this.test = test; + this.consequent = consequent; + this.alternate = alternate; + this.finish(); + return this; + }, + + finishContinueStatement: function (label) { + this.type = Syntax.ContinueStatement; + this.label = label; + this.finish(); + return this; + }, + + finishDebuggerStatement: function () { + this.type = Syntax.DebuggerStatement; + this.finish(); + return this; + }, + + finishDoWhileStatement: function (body, test) { + this.type = Syntax.DoWhileStatement; + this.body = body; + this.test = test; + this.finish(); + return this; + }, + + finishEmptyStatement: function () { + this.type = Syntax.EmptyStatement; + this.finish(); + return this; + }, + + finishExpressionStatement: function (expression) { + this.type = Syntax.ExpressionStatement; + this.expression = expression; + this.finish(); + return this; + }, + + finishForStatement: function (init, test, update, body) { + this.type = Syntax.ForStatement; + this.init = init; + this.test = test; + this.update = update; + this.body = body; + this.finish(); + return this; + }, + + finishForOfStatement: function (left, right, body) { + this.type = Syntax.ForOfStatement; + this.left = left; + this.right = right; + this.body = body; + this.finish(); + return this; + }, + + finishForInStatement: function (left, right, body) { + this.type = Syntax.ForInStatement; + this.left = left; + this.right = right; + this.body = body; + this.each = false; + this.finish(); + return this; + }, + + finishFunctionDeclaration: function (id, params, defaults, body, generator) { + this.type = Syntax.FunctionDeclaration; + this.id = id; + this.params = params; + this.defaults = defaults; + this.body = body; + this.generator = generator; + this.expression = false; + this.finish(); + return this; + }, + + finishFunctionExpression: function (id, params, defaults, body, generator) { + this.type = Syntax.FunctionExpression; + this.id = id; + this.params = params; + this.defaults = defaults; + this.body = body; + this.generator = generator; + this.expression = false; + this.finish(); + return this; + }, + + finishIdentifier: function (name) { + this.type = Syntax.Identifier; + this.name = name; + this.finish(); + return this; + }, + + finishIfStatement: function (test, consequent, alternate) { + this.type = Syntax.IfStatement; + this.test = test; + this.consequent = consequent; + this.alternate = alternate; + this.finish(); + return this; + }, + + finishLabeledStatement: function (label, body) { + this.type = Syntax.LabeledStatement; + this.label = label; + this.body = body; + this.finish(); + return this; + }, + + finishLiteral: function (token) { + this.type = Syntax.Literal; + this.value = token.value; + this.raw = source.slice(token.start, token.end); + if (token.regex) { + this.regex = token.regex; + } + this.finish(); + return this; + }, + + finishMemberExpression: function (accessor, object, property) { + this.type = Syntax.MemberExpression; + this.computed = accessor === '['; + this.object = object; + this.property = property; + this.finish(); + return this; + }, + + finishMetaProperty: function (meta, property) { + this.type = Syntax.MetaProperty; + this.meta = meta; + this.property = property; + this.finish(); + return this; + }, + + finishNewExpression: function (callee, args) { + this.type = Syntax.NewExpression; + this.callee = callee; + this.arguments = args; + this.finish(); + return this; + }, + + finishObjectExpression: function (properties) { + this.type = Syntax.ObjectExpression; + this.properties = properties; + this.finish(); + return this; + }, + + finishObjectPattern: function (properties) { + this.type = Syntax.ObjectPattern; + this.properties = properties; + this.finish(); + return this; + }, + + finishPostfixExpression: function (operator, argument) { + this.type = Syntax.UpdateExpression; + this.operator = operator; + this.argument = argument; + this.prefix = false; + this.finish(); + return this; + }, + + finishProgram: function (body, sourceType) { + this.type = Syntax.Program; + this.body = body; + this.sourceType = sourceType; + this.finish(); + return this; + }, + + finishProperty: function (kind, key, computed, value, method, shorthand) { + this.type = Syntax.Property; + this.key = key; + this.computed = computed; + this.value = value; + this.kind = kind; + this.method = method; + this.shorthand = shorthand; + this.finish(); + return this; + }, + + finishRestElement: function (argument) { + this.type = Syntax.RestElement; + this.argument = argument; + this.finish(); + return this; + }, + + finishReturnStatement: function (argument) { + this.type = Syntax.ReturnStatement; + this.argument = argument; + this.finish(); + return this; + }, + + finishSequenceExpression: function (expressions) { + this.type = Syntax.SequenceExpression; + this.expressions = expressions; + this.finish(); + return this; + }, + + finishSpreadElement: function (argument) { + this.type = Syntax.SpreadElement; + this.argument = argument; + this.finish(); + return this; + }, + + finishSwitchCase: function (test, consequent) { + this.type = Syntax.SwitchCase; + this.test = test; + this.consequent = consequent; + this.finish(); + return this; + }, + + finishSuper: function () { + this.type = Syntax.Super; + this.finish(); + return this; + }, + + finishSwitchStatement: function (discriminant, cases) { + this.type = Syntax.SwitchStatement; + this.discriminant = discriminant; + this.cases = cases; + this.finish(); + return this; + }, + + finishTaggedTemplateExpression: function (tag, quasi) { + this.type = Syntax.TaggedTemplateExpression; + this.tag = tag; + this.quasi = quasi; + this.finish(); + return this; + }, + + finishTemplateElement: function (value, tail) { + this.type = Syntax.TemplateElement; + this.value = value; + this.tail = tail; + this.finish(); + return this; + }, + + finishTemplateLiteral: function (quasis, expressions) { + this.type = Syntax.TemplateLiteral; + this.quasis = quasis; + this.expressions = expressions; + this.finish(); + return this; + }, + + finishThisExpression: function () { + this.type = Syntax.ThisExpression; + this.finish(); + return this; + }, + + finishThrowStatement: function (argument) { + this.type = Syntax.ThrowStatement; + this.argument = argument; + this.finish(); + return this; + }, + + finishTryStatement: function (block, handler, finalizer) { + this.type = Syntax.TryStatement; + this.block = block; + this.guardedHandlers = []; + this.handlers = handler ? [handler] : []; + this.handler = handler; + this.finalizer = finalizer; + this.finish(); + return this; + }, + + finishUnaryExpression: function (operator, argument) { + this.type = (operator === '++' || operator === '--') ? Syntax.UpdateExpression : Syntax.UnaryExpression; + this.operator = operator; + this.argument = argument; + this.prefix = true; + this.finish(); + return this; + }, + + finishVariableDeclaration: function (declarations) { + this.type = Syntax.VariableDeclaration; + this.declarations = declarations; + this.kind = 'var'; + this.finish(); + return this; + }, + + finishLexicalDeclaration: function (declarations, kind) { + this.type = Syntax.VariableDeclaration; + this.declarations = declarations; + this.kind = kind; + this.finish(); + return this; + }, + + finishVariableDeclarator: function (id, init) { + this.type = Syntax.VariableDeclarator; + this.id = id; + this.init = init; + this.finish(); + return this; + }, + + finishWhileStatement: function (test, body) { + this.type = Syntax.WhileStatement; + this.test = test; + this.body = body; + this.finish(); + return this; + }, + + finishWithStatement: function (object, body) { + this.type = Syntax.WithStatement; + this.object = object; + this.body = body; + this.finish(); + return this; + }, + + finishExportSpecifier: function (local, exported) { + this.type = Syntax.ExportSpecifier; + this.exported = exported || local; + this.local = local; + this.finish(); + return this; + }, + + finishImportDefaultSpecifier: function (local) { + this.type = Syntax.ImportDefaultSpecifier; + this.local = local; + this.finish(); + return this; + }, + + finishImportNamespaceSpecifier: function (local) { + this.type = Syntax.ImportNamespaceSpecifier; + this.local = local; + this.finish(); + return this; + }, + + finishExportNamedDeclaration: function (declaration, specifiers, src) { + this.type = Syntax.ExportNamedDeclaration; + this.declaration = declaration; + this.specifiers = specifiers; + this.source = src; + this.finish(); + return this; + }, + + finishExportDefaultDeclaration: function (declaration) { + this.type = Syntax.ExportDefaultDeclaration; + this.declaration = declaration; + this.finish(); + return this; + }, + + finishExportAllDeclaration: function (src) { + this.type = Syntax.ExportAllDeclaration; + this.source = src; + this.finish(); + return this; + }, + + finishImportSpecifier: function (local, imported) { + this.type = Syntax.ImportSpecifier; + this.local = local || imported; + this.imported = imported; + this.finish(); + return this; + }, + + finishImportDeclaration: function (specifiers, src) { + this.type = Syntax.ImportDeclaration; + this.specifiers = specifiers; + this.source = src; + this.finish(); + return this; + }, + + finishYieldExpression: function (argument, delegate) { + this.type = Syntax.YieldExpression; + this.argument = argument; + this.delegate = delegate; + this.finish(); + return this; + } + }; + + + function recordError(error) { + var e, existing; + + for (e = 0; e < extra.errors.length; e++) { + existing = extra.errors[e]; + // Prevent duplicated error. + /* istanbul ignore next */ + if (existing.index === error.index && existing.message === error.message) { + return; + } + } + + extra.errors.push(error); + } + + function constructError(msg, column) { + var error = new Error(msg); + try { + throw error; + } catch (base) { + /* istanbul ignore else */ + if (Object.create && Object.defineProperty) { + error = Object.create(base); + Object.defineProperty(error, 'column', { value: column }); + } + } finally { + return error; + } + } + + function createError(line, pos, description) { + var msg, column, error; + + msg = 'Line ' + line + ': ' + description; + column = pos - (scanning ? lineStart : lastLineStart) + 1; + error = constructError(msg, column); + error.lineNumber = line; + error.description = description; + error.index = pos; + return error; + } + + // Throw an exception + + function throwError(messageFormat) { + var args, msg; + + args = Array.prototype.slice.call(arguments, 1); + msg = messageFormat.replace(/%(\d)/g, + function (whole, idx) { + assert(idx < args.length, 'Message reference must be in range'); + return args[idx]; + } + ); + + throw createError(lastLineNumber, lastIndex, msg); + } + + function tolerateError(messageFormat) { + var args, msg, error; + + args = Array.prototype.slice.call(arguments, 1); + /* istanbul ignore next */ + msg = messageFormat.replace(/%(\d)/g, + function (whole, idx) { + assert(idx < args.length, 'Message reference must be in range'); + return args[idx]; + } + ); + + error = createError(lineNumber, lastIndex, msg); + if (extra.errors) { + recordError(error); + } else { + throw error; + } + } + + // Throw an exception because of the token. + + function unexpectedTokenError(token, message) { + var value, msg = message || Messages.UnexpectedToken; + + if (token) { + if (!message) { + msg = (token.type === Token.EOF) ? Messages.UnexpectedEOS : + (token.type === Token.Identifier) ? Messages.UnexpectedIdentifier : + (token.type === Token.NumericLiteral) ? Messages.UnexpectedNumber : + (token.type === Token.StringLiteral) ? Messages.UnexpectedString : + (token.type === Token.Template) ? Messages.UnexpectedTemplate : + Messages.UnexpectedToken; + + if (token.type === Token.Keyword) { + if (isFutureReservedWord(token.value)) { + msg = Messages.UnexpectedReserved; + } else if (strict && isStrictModeReservedWord(token.value)) { + msg = Messages.StrictReservedWord; + } + } + } + + value = (token.type === Token.Template) ? token.value.raw : token.value; + } else { + value = 'ILLEGAL'; + } + + msg = msg.replace('%0', value); + + return (token && typeof token.lineNumber === 'number') ? + createError(token.lineNumber, token.start, msg) : + createError(scanning ? lineNumber : lastLineNumber, scanning ? index : lastIndex, msg); + } + + function throwUnexpectedToken(token, message) { + throw unexpectedTokenError(token, message); + } + + function tolerateUnexpectedToken(token, message) { + var error = unexpectedTokenError(token, message); + if (extra.errors) { + recordError(error); + } else { + throw error; + } + } + + // Expect the next token to match the specified punctuator. + // If not, an exception will be thrown. + + function expect(value) { + var token = lex(); + if (token.type !== Token.Punctuator || token.value !== value) { + throwUnexpectedToken(token); + } + } + + /** + * @name expectCommaSeparator + * @description Quietly expect a comma when in tolerant mode, otherwise delegates + * to expect(value) + * @since 2.0 + */ + function expectCommaSeparator() { + var token; + + if (extra.errors) { + token = lookahead; + if (token.type === Token.Punctuator && token.value === ',') { + lex(); + } else if (token.type === Token.Punctuator && token.value === ';') { + lex(); + tolerateUnexpectedToken(token); + } else { + tolerateUnexpectedToken(token, Messages.UnexpectedToken); + } + } else { + expect(','); + } + } + + // Expect the next token to match the specified keyword. + // If not, an exception will be thrown. + + function expectKeyword(keyword) { + var token = lex(); + if (token.type !== Token.Keyword || token.value !== keyword) { + throwUnexpectedToken(token); + } + } + + // Return true if the next token matches the specified punctuator. + + function match(value) { + return lookahead.type === Token.Punctuator && lookahead.value === value; + } + + // Return true if the next token matches the specified keyword + + function matchKeyword(keyword) { + return lookahead.type === Token.Keyword && lookahead.value === keyword; + } + + // Return true if the next token matches the specified contextual keyword + // (where an identifier is sometimes a keyword depending on the context) + + function matchContextualKeyword(keyword) { + return lookahead.type === Token.Identifier && lookahead.value === keyword; + } + + // Return true if the next token is an assignment operator + + function matchAssign() { + var op; + + if (lookahead.type !== Token.Punctuator) { + return false; + } + op = lookahead.value; + return op === '=' || + op === '*=' || + op === '/=' || + op === '%=' || + op === '+=' || + op === '-=' || + op === '<<=' || + op === '>>=' || + op === '>>>=' || + op === '&=' || + op === '^=' || + op === '|='; + } + + function consumeSemicolon() { + // Catch the very common case first: immediately a semicolon (U+003B). + if (source.charCodeAt(startIndex) === 0x3B || match(';')) { + lex(); + return; + } + + if (hasLineTerminator) { + return; + } + + // FIXME(ikarienator): this is seemingly an issue in the previous location info convention. + lastIndex = startIndex; + lastLineNumber = startLineNumber; + lastLineStart = startLineStart; + + if (lookahead.type !== Token.EOF && !match('}')) { + throwUnexpectedToken(lookahead); + } + } + + // Cover grammar support. + // + // When an assignment expression position starts with an left parenthesis, the determination of the type + // of the syntax is to be deferred arbitrarily long until the end of the parentheses pair (plus a lookahead) + // or the first comma. This situation also defers the determination of all the expressions nested in the pair. + // + // There are three productions that can be parsed in a parentheses pair that needs to be determined + // after the outermost pair is closed. They are: + // + // 1. AssignmentExpression + // 2. BindingElements + // 3. AssignmentTargets + // + // In order to avoid exponential backtracking, we use two flags to denote if the production can be + // binding element or assignment target. + // + // The three productions have the relationship: + // + // BindingElements ⊆ AssignmentTargets ⊆ AssignmentExpression + // + // with a single exception that CoverInitializedName when used directly in an Expression, generates + // an early error. Therefore, we need the third state, firstCoverInitializedNameError, to track the + // first usage of CoverInitializedName and report it when we reached the end of the parentheses pair. + // + // isolateCoverGrammar function runs the given parser function with a new cover grammar context, and it does not + // effect the current flags. This means the production the parser parses is only used as an expression. Therefore + // the CoverInitializedName check is conducted. + // + // inheritCoverGrammar function runs the given parse function with a new cover grammar context, and it propagates + // the flags outside of the parser. This means the production the parser parses is used as a part of a potential + // pattern. The CoverInitializedName check is deferred. + function isolateCoverGrammar(parser) { + var oldIsBindingElement = isBindingElement, + oldIsAssignmentTarget = isAssignmentTarget, + oldFirstCoverInitializedNameError = firstCoverInitializedNameError, + result; + isBindingElement = true; + isAssignmentTarget = true; + firstCoverInitializedNameError = null; + result = parser(); + if (firstCoverInitializedNameError !== null) { + throwUnexpectedToken(firstCoverInitializedNameError); + } + isBindingElement = oldIsBindingElement; + isAssignmentTarget = oldIsAssignmentTarget; + firstCoverInitializedNameError = oldFirstCoverInitializedNameError; + return result; + } + + function inheritCoverGrammar(parser) { + var oldIsBindingElement = isBindingElement, + oldIsAssignmentTarget = isAssignmentTarget, + oldFirstCoverInitializedNameError = firstCoverInitializedNameError, + result; + isBindingElement = true; + isAssignmentTarget = true; + firstCoverInitializedNameError = null; + result = parser(); + isBindingElement = isBindingElement && oldIsBindingElement; + isAssignmentTarget = isAssignmentTarget && oldIsAssignmentTarget; + firstCoverInitializedNameError = oldFirstCoverInitializedNameError || firstCoverInitializedNameError; + return result; + } + + // ECMA-262 13.3.3 Destructuring Binding Patterns + + function parseArrayPattern(params, kind) { + var node = new Node(), elements = [], rest, restNode; + expect('['); + + while (!match(']')) { + if (match(',')) { + lex(); + elements.push(null); + } else { + if (match('...')) { + restNode = new Node(); + lex(); + params.push(lookahead); + rest = parseVariableIdentifier(params, kind); + elements.push(restNode.finishRestElement(rest)); + break; + } else { + elements.push(parsePatternWithDefault(params, kind)); + } + if (!match(']')) { + expect(','); + } + } + + } + + expect(']'); + + return node.finishArrayPattern(elements); + } + + function parsePropertyPattern(params, kind) { + var node = new Node(), key, keyToken, computed = match('['), init; + if (lookahead.type === Token.Identifier) { + keyToken = lookahead; + key = parseVariableIdentifier(); + if (match('=')) { + params.push(keyToken); + lex(); + init = parseAssignmentExpression(); + + return node.finishProperty( + 'init', key, false, + new WrappingNode(keyToken).finishAssignmentPattern(key, init), false, false); + } else if (!match(':')) { + params.push(keyToken); + return node.finishProperty('init', key, false, key, false, true); + } + } else { + key = parseObjectPropertyKey(params, kind); + } + expect(':'); + init = parsePatternWithDefault(params, kind); + return node.finishProperty('init', key, computed, init, false, false); + } + + function parseObjectPattern(params, kind) { + var node = new Node(), properties = []; + + expect('{'); + + while (!match('}')) { + properties.push(parsePropertyPattern(params, kind)); + if (!match('}')) { + expect(','); + } + } + + lex(); + + return node.finishObjectPattern(properties); + } + + function parsePattern(params, kind) { + if (match('[')) { + return parseArrayPattern(params, kind); + } else if (match('{')) { + return parseObjectPattern(params, kind); + } + params.push(lookahead); + return parseVariableIdentifier(kind); + } + + function parsePatternWithDefault(params, kind) { + var startToken = lookahead, pattern, previousAllowYield, right; + pattern = parsePattern(params, kind); + if (match('=')) { + lex(); + previousAllowYield = state.allowYield; + state.allowYield = true; + right = isolateCoverGrammar(parseAssignmentExpression); + state.allowYield = previousAllowYield; + pattern = new WrappingNode(startToken).finishAssignmentPattern(pattern, right); + } + return pattern; + } + + // ECMA-262 12.2.5 Array Initializer + + function parseArrayInitializer() { + var elements = [], node = new Node(), restSpread; + + expect('['); + + while (!match(']')) { + if (match(',')) { + lex(); + elements.push(null); + } else if (match('...')) { + restSpread = new Node(); + lex(); + restSpread.finishSpreadElement(inheritCoverGrammar(parseAssignmentExpression)); + + if (!match(']')) { + isAssignmentTarget = isBindingElement = false; + expect(','); + } + elements.push(restSpread); + } else { + elements.push(inheritCoverGrammar(parseAssignmentExpression)); + + if (!match(']')) { + expect(','); + } + } + } + + lex(); + + return node.finishArrayExpression(elements); + } + + // ECMA-262 12.2.6 Object Initializer + + function parsePropertyFunction(node, paramInfo, isGenerator) { + var previousStrict, body; + + isAssignmentTarget = isBindingElement = false; + + previousStrict = strict; + body = isolateCoverGrammar(parseFunctionSourceElements); + + if (strict && paramInfo.firstRestricted) { + tolerateUnexpectedToken(paramInfo.firstRestricted, paramInfo.message); + } + if (strict && paramInfo.stricted) { + tolerateUnexpectedToken(paramInfo.stricted, paramInfo.message); + } + + strict = previousStrict; + return node.finishFunctionExpression(null, paramInfo.params, paramInfo.defaults, body, isGenerator); + } + + function parsePropertyMethodFunction() { + var params, method, node = new Node(), + previousAllowYield = state.allowYield; + + state.allowYield = false; + params = parseParams(); + state.allowYield = previousAllowYield; + + state.allowYield = false; + method = parsePropertyFunction(node, params, false); + state.allowYield = previousAllowYield; + + return method; + } + + function parseObjectPropertyKey() { + var token, node = new Node(), expr; + + token = lex(); + + // Note: This function is called only from parseObjectProperty(), where + // EOF and Punctuator tokens are already filtered out. + + switch (token.type) { + case Token.StringLiteral: + case Token.NumericLiteral: + if (strict && token.octal) { + tolerateUnexpectedToken(token, Messages.StrictOctalLiteral); + } + return node.finishLiteral(token); + case Token.Identifier: + case Token.BooleanLiteral: + case Token.NullLiteral: + case Token.Keyword: + return node.finishIdentifier(token.value); + case Token.Punctuator: + if (token.value === '[') { + expr = isolateCoverGrammar(parseAssignmentExpression); + expect(']'); + return expr; + } + break; + } + throwUnexpectedToken(token); + } + + function lookaheadPropertyName() { + switch (lookahead.type) { + case Token.Identifier: + case Token.StringLiteral: + case Token.BooleanLiteral: + case Token.NullLiteral: + case Token.NumericLiteral: + case Token.Keyword: + return true; + case Token.Punctuator: + return lookahead.value === '['; + } + return false; + } + + // This function is to try to parse a MethodDefinition as defined in 14.3. But in the case of object literals, + // it might be called at a position where there is in fact a short hand identifier pattern or a data property. + // This can only be determined after we consumed up to the left parentheses. + // + // In order to avoid back tracking, it returns `null` if the position is not a MethodDefinition and the caller + // is responsible to visit other options. + function tryParseMethodDefinition(token, key, computed, node) { + var value, options, methodNode, params, + previousAllowYield = state.allowYield; + + if (token.type === Token.Identifier) { + // check for `get` and `set`; + + if (token.value === 'get' && lookaheadPropertyName()) { + computed = match('['); + key = parseObjectPropertyKey(); + methodNode = new Node(); + expect('('); + expect(')'); + + state.allowYield = false; + value = parsePropertyFunction(methodNode, { + params: [], + defaults: [], + stricted: null, + firstRestricted: null, + message: null + }, false); + state.allowYield = previousAllowYield; + + return node.finishProperty('get', key, computed, value, false, false); + } else if (token.value === 'set' && lookaheadPropertyName()) { + computed = match('['); + key = parseObjectPropertyKey(); + methodNode = new Node(); + expect('('); + + options = { + params: [], + defaultCount: 0, + defaults: [], + firstRestricted: null, + paramSet: {} + }; + if (match(')')) { + tolerateUnexpectedToken(lookahead); + } else { + state.allowYield = false; + parseParam(options); + state.allowYield = previousAllowYield; + if (options.defaultCount === 0) { + options.defaults = []; + } + } + expect(')'); + + state.allowYield = false; + value = parsePropertyFunction(methodNode, options, false); + state.allowYield = previousAllowYield; + + return node.finishProperty('set', key, computed, value, false, false); + } + } else if (token.type === Token.Punctuator && token.value === '*' && lookaheadPropertyName()) { + computed = match('['); + key = parseObjectPropertyKey(); + methodNode = new Node(); + + state.allowYield = true; + params = parseParams(); + state.allowYield = previousAllowYield; + + state.allowYield = false; + value = parsePropertyFunction(methodNode, params, true); + state.allowYield = previousAllowYield; + + return node.finishProperty('init', key, computed, value, true, false); + } + + if (key && match('(')) { + value = parsePropertyMethodFunction(); + return node.finishProperty('init', key, computed, value, true, false); + } + + // Not a MethodDefinition. + return null; + } + + function parseObjectProperty(hasProto) { + var token = lookahead, node = new Node(), computed, key, maybeMethod, proto, value; + + computed = match('['); + if (match('*')) { + lex(); + } else { + key = parseObjectPropertyKey(); + } + maybeMethod = tryParseMethodDefinition(token, key, computed, node); + if (maybeMethod) { + return maybeMethod; + } + + if (!key) { + throwUnexpectedToken(lookahead); + } + + // Check for duplicated __proto__ + if (!computed) { + proto = (key.type === Syntax.Identifier && key.name === '__proto__') || + (key.type === Syntax.Literal && key.value === '__proto__'); + if (hasProto.value && proto) { + tolerateError(Messages.DuplicateProtoProperty); + } + hasProto.value |= proto; + } + + if (match(':')) { + lex(); + value = inheritCoverGrammar(parseAssignmentExpression); + return node.finishProperty('init', key, computed, value, false, false); + } + + if (token.type === Token.Identifier) { + if (match('=')) { + firstCoverInitializedNameError = lookahead; + lex(); + value = isolateCoverGrammar(parseAssignmentExpression); + return node.finishProperty('init', key, computed, + new WrappingNode(token).finishAssignmentPattern(key, value), false, true); + } + return node.finishProperty('init', key, computed, key, false, true); + } + + throwUnexpectedToken(lookahead); + } + + function parseObjectInitializer() { + var properties = [], hasProto = {value: false}, node = new Node(); + + expect('{'); + + while (!match('}')) { + properties.push(parseObjectProperty(hasProto)); + + if (!match('}')) { + expectCommaSeparator(); + } + } + + expect('}'); + + return node.finishObjectExpression(properties); + } + + function reinterpretExpressionAsPattern(expr) { + var i; + switch (expr.type) { + case Syntax.Identifier: + case Syntax.MemberExpression: + case Syntax.RestElement: + case Syntax.AssignmentPattern: + break; + case Syntax.SpreadElement: + expr.type = Syntax.RestElement; + reinterpretExpressionAsPattern(expr.argument); + break; + case Syntax.ArrayExpression: + expr.type = Syntax.ArrayPattern; + for (i = 0; i < expr.elements.length; i++) { + if (expr.elements[i] !== null) { + reinterpretExpressionAsPattern(expr.elements[i]); + } + } + break; + case Syntax.ObjectExpression: + expr.type = Syntax.ObjectPattern; + for (i = 0; i < expr.properties.length; i++) { + reinterpretExpressionAsPattern(expr.properties[i].value); + } + break; + case Syntax.AssignmentExpression: + expr.type = Syntax.AssignmentPattern; + reinterpretExpressionAsPattern(expr.left); + break; + default: + // Allow other node type for tolerant parsing. + break; + } + } + + // ECMA-262 12.2.9 Template Literals + + function parseTemplateElement(option) { + var node, token; + + if (lookahead.type !== Token.Template || (option.head && !lookahead.head)) { + throwUnexpectedToken(); + } + + node = new Node(); + token = lex(); + + return node.finishTemplateElement({ raw: token.value.raw, cooked: token.value.cooked }, token.tail); + } + + function parseTemplateLiteral() { + var quasi, quasis, expressions, node = new Node(); + + quasi = parseTemplateElement({ head: true }); + quasis = [quasi]; + expressions = []; + + while (!quasi.tail) { + expressions.push(parseExpression()); + quasi = parseTemplateElement({ head: false }); + quasis.push(quasi); + } + + return node.finishTemplateLiteral(quasis, expressions); + } + + // ECMA-262 12.2.10 The Grouping Operator + + function parseGroupExpression() { + var expr, expressions, startToken, i, params = []; + + expect('('); + + if (match(')')) { + lex(); + if (!match('=>')) { + expect('=>'); + } + return { + type: PlaceHolders.ArrowParameterPlaceHolder, + params: [], + rawParams: [] + }; + } + + startToken = lookahead; + if (match('...')) { + expr = parseRestElement(params); + expect(')'); + if (!match('=>')) { + expect('=>'); + } + return { + type: PlaceHolders.ArrowParameterPlaceHolder, + params: [expr] + }; + } + + isBindingElement = true; + expr = inheritCoverGrammar(parseAssignmentExpression); + + if (match(',')) { + isAssignmentTarget = false; + expressions = [expr]; + + while (startIndex < length) { + if (!match(',')) { + break; + } + lex(); + + if (match('...')) { + if (!isBindingElement) { + throwUnexpectedToken(lookahead); + } + expressions.push(parseRestElement(params)); + expect(')'); + if (!match('=>')) { + expect('=>'); + } + isBindingElement = false; + for (i = 0; i < expressions.length; i++) { + reinterpretExpressionAsPattern(expressions[i]); + } + return { + type: PlaceHolders.ArrowParameterPlaceHolder, + params: expressions + }; + } + + expressions.push(inheritCoverGrammar(parseAssignmentExpression)); + } + + expr = new WrappingNode(startToken).finishSequenceExpression(expressions); + } + + + expect(')'); + + if (match('=>')) { + if (expr.type === Syntax.Identifier && expr.name === 'yield') { + return { + type: PlaceHolders.ArrowParameterPlaceHolder, + params: [expr] + }; + } + + if (!isBindingElement) { + throwUnexpectedToken(lookahead); + } + + if (expr.type === Syntax.SequenceExpression) { + for (i = 0; i < expr.expressions.length; i++) { + reinterpretExpressionAsPattern(expr.expressions[i]); + } + } else { + reinterpretExpressionAsPattern(expr); + } + + expr = { + type: PlaceHolders.ArrowParameterPlaceHolder, + params: expr.type === Syntax.SequenceExpression ? expr.expressions : [expr] + }; + } + isBindingElement = false; + return expr; + } + + + // ECMA-262 12.2 Primary Expressions + + function parsePrimaryExpression() { + var type, token, expr, node; + + if (match('(')) { + isBindingElement = false; + return inheritCoverGrammar(parseGroupExpression); + } + + if (match('[')) { + return inheritCoverGrammar(parseArrayInitializer); + } + + if (match('{')) { + return inheritCoverGrammar(parseObjectInitializer); + } + + type = lookahead.type; + node = new Node(); + + if (type === Token.Identifier) { + if (state.sourceType === 'module' && lookahead.value === 'await') { + tolerateUnexpectedToken(lookahead); + } + expr = node.finishIdentifier(lex().value); + } else if (type === Token.StringLiteral || type === Token.NumericLiteral) { + isAssignmentTarget = isBindingElement = false; + if (strict && lookahead.octal) { + tolerateUnexpectedToken(lookahead, Messages.StrictOctalLiteral); + } + expr = node.finishLiteral(lex()); + } else if (type === Token.Keyword) { + if (!strict && state.allowYield && matchKeyword('yield')) { + return parseNonComputedProperty(); + } + isAssignmentTarget = isBindingElement = false; + if (matchKeyword('function')) { + return parseFunctionExpression(); + } + if (matchKeyword('this')) { + lex(); + return node.finishThisExpression(); + } + if (matchKeyword('class')) { + return parseClassExpression(); + } + throwUnexpectedToken(lex()); + } else if (type === Token.BooleanLiteral) { + isAssignmentTarget = isBindingElement = false; + token = lex(); + token.value = (token.value === 'true'); + expr = node.finishLiteral(token); + } else if (type === Token.NullLiteral) { + isAssignmentTarget = isBindingElement = false; + token = lex(); + token.value = null; + expr = node.finishLiteral(token); + } else if (match('/') || match('/=')) { + isAssignmentTarget = isBindingElement = false; + index = startIndex; + + if (typeof extra.tokens !== 'undefined') { + token = collectRegex(); + } else { + token = scanRegExp(); + } + lex(); + expr = node.finishLiteral(token); + } else if (type === Token.Template) { + expr = parseTemplateLiteral(); + } else { + throwUnexpectedToken(lex()); + } + + return expr; + } + + // ECMA-262 12.3 Left-Hand-Side Expressions + + function parseArguments() { + var args = [], expr; + + expect('('); + + if (!match(')')) { + while (startIndex < length) { + if (match('...')) { + expr = new Node(); + lex(); + expr.finishSpreadElement(isolateCoverGrammar(parseAssignmentExpression)); + } else { + expr = isolateCoverGrammar(parseAssignmentExpression); + } + args.push(expr); + if (match(')')) { + break; + } + expectCommaSeparator(); + } + } + + expect(')'); + + return args; + } + + function parseNonComputedProperty() { + var token, node = new Node(); + + token = lex(); + + if (!isIdentifierName(token)) { + throwUnexpectedToken(token); + } + + return node.finishIdentifier(token.value); + } + + function parseNonComputedMember() { + expect('.'); + + return parseNonComputedProperty(); + } + + function parseComputedMember() { + var expr; + + expect('['); + + expr = isolateCoverGrammar(parseExpression); + + expect(']'); + + return expr; + } + + // ECMA-262 12.3.3 The new Operator + + function parseNewExpression() { + var callee, args, node = new Node(); + + expectKeyword('new'); + + if (match('.')) { + lex(); + if (lookahead.type === Token.Identifier && lookahead.value === 'target') { + if (state.inFunctionBody) { + lex(); + return node.finishMetaProperty('new', 'target'); + } + } + throwUnexpectedToken(lookahead); + } + + callee = isolateCoverGrammar(parseLeftHandSideExpression); + args = match('(') ? parseArguments() : []; + + isAssignmentTarget = isBindingElement = false; + + return node.finishNewExpression(callee, args); + } + + // ECMA-262 12.3.4 Function Calls + + function parseLeftHandSideExpressionAllowCall() { + var quasi, expr, args, property, startToken, previousAllowIn = state.allowIn; + + startToken = lookahead; + state.allowIn = true; + + if (matchKeyword('super') && state.inFunctionBody) { + expr = new Node(); + lex(); + expr = expr.finishSuper(); + if (!match('(') && !match('.') && !match('[')) { + throwUnexpectedToken(lookahead); + } + } else { + expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression); + } + + for (;;) { + if (match('.')) { + isBindingElement = false; + isAssignmentTarget = true; + property = parseNonComputedMember(); + expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property); + } else if (match('(')) { + isBindingElement = false; + isAssignmentTarget = false; + args = parseArguments(); + expr = new WrappingNode(startToken).finishCallExpression(expr, args); + } else if (match('[')) { + isBindingElement = false; + isAssignmentTarget = true; + property = parseComputedMember(); + expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property); + } else if (lookahead.type === Token.Template && lookahead.head) { + quasi = parseTemplateLiteral(); + expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi); + } else { + break; + } + } + state.allowIn = previousAllowIn; + + return expr; + } + + // ECMA-262 12.3 Left-Hand-Side Expressions + + function parseLeftHandSideExpression() { + var quasi, expr, property, startToken; + assert(state.allowIn, 'callee of new expression always allow in keyword.'); + + startToken = lookahead; + + if (matchKeyword('super') && state.inFunctionBody) { + expr = new Node(); + lex(); + expr = expr.finishSuper(); + if (!match('[') && !match('.')) { + throwUnexpectedToken(lookahead); + } + } else { + expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression); + } + + for (;;) { + if (match('[')) { + isBindingElement = false; + isAssignmentTarget = true; + property = parseComputedMember(); + expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property); + } else if (match('.')) { + isBindingElement = false; + isAssignmentTarget = true; + property = parseNonComputedMember(); + expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property); + } else if (lookahead.type === Token.Template && lookahead.head) { + quasi = parseTemplateLiteral(); + expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi); + } else { + break; + } + } + return expr; + } + + // ECMA-262 12.4 Postfix Expressions + + function parsePostfixExpression() { + var expr, token, startToken = lookahead; + + expr = inheritCoverGrammar(parseLeftHandSideExpressionAllowCall); + + if (!hasLineTerminator && lookahead.type === Token.Punctuator) { + if (match('++') || match('--')) { + // ECMA-262 11.3.1, 11.3.2 + if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) { + tolerateError(Messages.StrictLHSPostfix); + } + + if (!isAssignmentTarget) { + tolerateError(Messages.InvalidLHSInAssignment); + } + + isAssignmentTarget = isBindingElement = false; + + token = lex(); + expr = new WrappingNode(startToken).finishPostfixExpression(token.value, expr); + } + } + + return expr; + } + + // ECMA-262 12.5 Unary Operators + + function parseUnaryExpression() { + var token, expr, startToken; + + if (lookahead.type !== Token.Punctuator && lookahead.type !== Token.Keyword) { + expr = parsePostfixExpression(); + } else if (match('++') || match('--')) { + startToken = lookahead; + token = lex(); + expr = inheritCoverGrammar(parseUnaryExpression); + // ECMA-262 11.4.4, 11.4.5 + if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) { + tolerateError(Messages.StrictLHSPrefix); + } + + if (!isAssignmentTarget) { + tolerateError(Messages.InvalidLHSInAssignment); + } + expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr); + isAssignmentTarget = isBindingElement = false; + } else if (match('+') || match('-') || match('~') || match('!')) { + startToken = lookahead; + token = lex(); + expr = inheritCoverGrammar(parseUnaryExpression); + expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr); + isAssignmentTarget = isBindingElement = false; + } else if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) { + startToken = lookahead; + token = lex(); + expr = inheritCoverGrammar(parseUnaryExpression); + expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr); + if (strict && expr.operator === 'delete' && expr.argument.type === Syntax.Identifier) { + tolerateError(Messages.StrictDelete); + } + isAssignmentTarget = isBindingElement = false; + } else { + expr = parsePostfixExpression(); + } + + return expr; + } + + function binaryPrecedence(token, allowIn) { + var prec = 0; + + if (token.type !== Token.Punctuator && token.type !== Token.Keyword) { + return 0; + } + + switch (token.value) { + case '||': + prec = 1; + break; + + case '&&': + prec = 2; + break; + + case '|': + prec = 3; + break; + + case '^': + prec = 4; + break; + + case '&': + prec = 5; + break; + + case '==': + case '!=': + case '===': + case '!==': + prec = 6; + break; + + case '<': + case '>': + case '<=': + case '>=': + case 'instanceof': + prec = 7; + break; + + case 'in': + prec = allowIn ? 7 : 0; + break; + + case '<<': + case '>>': + case '>>>': + prec = 8; + break; + + case '+': + case '-': + prec = 9; + break; + + case '*': + case '/': + case '%': + prec = 11; + break; + + default: + break; + } + + return prec; + } + + // ECMA-262 12.6 Multiplicative Operators + // ECMA-262 12.7 Additive Operators + // ECMA-262 12.8 Bitwise Shift Operators + // ECMA-262 12.9 Relational Operators + // ECMA-262 12.10 Equality Operators + // ECMA-262 12.11 Binary Bitwise Operators + // ECMA-262 12.12 Binary Logical Operators + + function parseBinaryExpression() { + var marker, markers, expr, token, prec, stack, right, operator, left, i; + + marker = lookahead; + left = inheritCoverGrammar(parseUnaryExpression); + + token = lookahead; + prec = binaryPrecedence(token, state.allowIn); + if (prec === 0) { + return left; + } + isAssignmentTarget = isBindingElement = false; + token.prec = prec; + lex(); + + markers = [marker, lookahead]; + right = isolateCoverGrammar(parseUnaryExpression); + + stack = [left, token, right]; + + while ((prec = binaryPrecedence(lookahead, state.allowIn)) > 0) { + + // Reduce: make a binary expression from the three topmost entries. + while ((stack.length > 2) && (prec <= stack[stack.length - 2].prec)) { + right = stack.pop(); + operator = stack.pop().value; + left = stack.pop(); + markers.pop(); + expr = new WrappingNode(markers[markers.length - 1]).finishBinaryExpression(operator, left, right); + stack.push(expr); + } + + // Shift. + token = lex(); + token.prec = prec; + stack.push(token); + markers.push(lookahead); + expr = isolateCoverGrammar(parseUnaryExpression); + stack.push(expr); + } + + // Final reduce to clean-up the stack. + i = stack.length - 1; + expr = stack[i]; + markers.pop(); + while (i > 1) { + expr = new WrappingNode(markers.pop()).finishBinaryExpression(stack[i - 1].value, stack[i - 2], expr); + i -= 2; + } + + return expr; + } + + + // ECMA-262 12.13 Conditional Operator + + function parseConditionalExpression() { + var expr, previousAllowIn, consequent, alternate, startToken; + + startToken = lookahead; + + expr = inheritCoverGrammar(parseBinaryExpression); + if (match('?')) { + lex(); + previousAllowIn = state.allowIn; + state.allowIn = true; + consequent = isolateCoverGrammar(parseAssignmentExpression); + state.allowIn = previousAllowIn; + expect(':'); + alternate = isolateCoverGrammar(parseAssignmentExpression); + + expr = new WrappingNode(startToken).finishConditionalExpression(expr, consequent, alternate); + isAssignmentTarget = isBindingElement = false; + } + + return expr; + } + + // ECMA-262 14.2 Arrow Function Definitions + + function parseConciseBody() { + if (match('{')) { + return parseFunctionSourceElements(); + } + return isolateCoverGrammar(parseAssignmentExpression); + } + + function checkPatternParam(options, param) { + var i; + switch (param.type) { + case Syntax.Identifier: + validateParam(options, param, param.name); + break; + case Syntax.RestElement: + checkPatternParam(options, param.argument); + break; + case Syntax.AssignmentPattern: + checkPatternParam(options, param.left); + break; + case Syntax.ArrayPattern: + for (i = 0; i < param.elements.length; i++) { + if (param.elements[i] !== null) { + checkPatternParam(options, param.elements[i]); + } + } + break; + case Syntax.YieldExpression: + break; + default: + assert(param.type === Syntax.ObjectPattern, 'Invalid type'); + for (i = 0; i < param.properties.length; i++) { + checkPatternParam(options, param.properties[i].value); + } + break; + } + } + function reinterpretAsCoverFormalsList(expr) { + var i, len, param, params, defaults, defaultCount, options, token; + + defaults = []; + defaultCount = 0; + params = [expr]; + + switch (expr.type) { + case Syntax.Identifier: + break; + case PlaceHolders.ArrowParameterPlaceHolder: + params = expr.params; + break; + default: + return null; + } + + options = { + paramSet: {} + }; + + for (i = 0, len = params.length; i < len; i += 1) { + param = params[i]; + switch (param.type) { + case Syntax.AssignmentPattern: + params[i] = param.left; + if (param.right.type === Syntax.YieldExpression) { + if (param.right.argument) { + throwUnexpectedToken(lookahead); + } + param.right.type = Syntax.Identifier; + param.right.name = 'yield'; + delete param.right.argument; + delete param.right.delegate; + } + defaults.push(param.right); + ++defaultCount; + checkPatternParam(options, param.left); + break; + default: + checkPatternParam(options, param); + params[i] = param; + defaults.push(null); + break; + } + } + + if (strict || !state.allowYield) { + for (i = 0, len = params.length; i < len; i += 1) { + param = params[i]; + if (param.type === Syntax.YieldExpression) { + throwUnexpectedToken(lookahead); + } + } + } + + if (options.message === Messages.StrictParamDupe) { + token = strict ? options.stricted : options.firstRestricted; + throwUnexpectedToken(token, options.message); + } + + if (defaultCount === 0) { + defaults = []; + } + + return { + params: params, + defaults: defaults, + stricted: options.stricted, + firstRestricted: options.firstRestricted, + message: options.message + }; + } + + function parseArrowFunctionExpression(options, node) { + var previousStrict, previousAllowYield, body; + + if (hasLineTerminator) { + tolerateUnexpectedToken(lookahead); + } + expect('=>'); + + previousStrict = strict; + previousAllowYield = state.allowYield; + state.allowYield = true; + + body = parseConciseBody(); + + if (strict && options.firstRestricted) { + throwUnexpectedToken(options.firstRestricted, options.message); + } + if (strict && options.stricted) { + tolerateUnexpectedToken(options.stricted, options.message); + } + + strict = previousStrict; + state.allowYield = previousAllowYield; + + return node.finishArrowFunctionExpression(options.params, options.defaults, body, body.type !== Syntax.BlockStatement); + } + + // ECMA-262 14.4 Yield expression + + function parseYieldExpression() { + var argument, expr, delegate, previousAllowYield; + + argument = null; + expr = new Node(); + + expectKeyword('yield'); + + if (!hasLineTerminator) { + previousAllowYield = state.allowYield; + state.allowYield = false; + delegate = match('*'); + if (delegate) { + lex(); + argument = parseAssignmentExpression(); + } else { + if (!match(';') && !match('}') && !match(')') && lookahead.type !== Token.EOF) { + argument = parseAssignmentExpression(); + } + } + state.allowYield = previousAllowYield; + } + + return expr.finishYieldExpression(argument, delegate); + } + + // ECMA-262 12.14 Assignment Operators + + function parseAssignmentExpression() { + var token, expr, right, list, startToken; + + startToken = lookahead; + token = lookahead; + + if (!state.allowYield && matchKeyword('yield')) { + return parseYieldExpression(); + } + + expr = parseConditionalExpression(); + + if (expr.type === PlaceHolders.ArrowParameterPlaceHolder || match('=>')) { + isAssignmentTarget = isBindingElement = false; + list = reinterpretAsCoverFormalsList(expr); + + if (list) { + firstCoverInitializedNameError = null; + return parseArrowFunctionExpression(list, new WrappingNode(startToken)); + } + + return expr; + } + + if (matchAssign()) { + if (!isAssignmentTarget) { + tolerateError(Messages.InvalidLHSInAssignment); + } + + // ECMA-262 12.1.1 + if (strict && expr.type === Syntax.Identifier) { + if (isRestrictedWord(expr.name)) { + tolerateUnexpectedToken(token, Messages.StrictLHSAssignment); + } + if (isStrictModeReservedWord(expr.name)) { + tolerateUnexpectedToken(token, Messages.StrictReservedWord); + } + } + + if (!match('=')) { + isAssignmentTarget = isBindingElement = false; + } else { + reinterpretExpressionAsPattern(expr); + } + + token = lex(); + right = isolateCoverGrammar(parseAssignmentExpression); + expr = new WrappingNode(startToken).finishAssignmentExpression(token.value, expr, right); + firstCoverInitializedNameError = null; + } + + return expr; + } + + // ECMA-262 12.15 Comma Operator + + function parseExpression() { + var expr, startToken = lookahead, expressions; + + expr = isolateCoverGrammar(parseAssignmentExpression); + + if (match(',')) { + expressions = [expr]; + + while (startIndex < length) { + if (!match(',')) { + break; + } + lex(); + expressions.push(isolateCoverGrammar(parseAssignmentExpression)); + } + + expr = new WrappingNode(startToken).finishSequenceExpression(expressions); + } + + return expr; + } + + // ECMA-262 13.2 Block + + function parseStatementListItem() { + if (lookahead.type === Token.Keyword) { + switch (lookahead.value) { + case 'export': + if (state.sourceType !== 'module') { + tolerateUnexpectedToken(lookahead, Messages.IllegalExportDeclaration); + } + return parseExportDeclaration(); + case 'import': + if (state.sourceType !== 'module') { + tolerateUnexpectedToken(lookahead, Messages.IllegalImportDeclaration); + } + return parseImportDeclaration(); + case 'const': + case 'let': + return parseLexicalDeclaration({inFor: false}); + case 'function': + return parseFunctionDeclaration(new Node()); + case 'class': + return parseClassDeclaration(); + } + } + + return parseStatement(); + } + + function parseStatementList() { + var list = []; + while (startIndex < length) { + if (match('}')) { + break; + } + list.push(parseStatementListItem()); + } + + return list; + } + + function parseBlock() { + var block, node = new Node(); + + expect('{'); + + block = parseStatementList(); + + expect('}'); + + return node.finishBlockStatement(block); + } + + // ECMA-262 13.3.2 Variable Statement + + function parseVariableIdentifier(kind) { + var token, node = new Node(); + + token = lex(); + + if (token.type === Token.Keyword && token.value === 'yield') { + if (strict) { + tolerateUnexpectedToken(token, Messages.StrictReservedWord); + } if (!state.allowYield) { + throwUnexpectedToken(token); + } + } else if (token.type !== Token.Identifier) { + if (strict && token.type === Token.Keyword && isStrictModeReservedWord(token.value)) { + tolerateUnexpectedToken(token, Messages.StrictReservedWord); + } else { + if (strict || token.value !== 'let' || kind !== 'var') { + throwUnexpectedToken(token); + } + } + } else if (state.sourceType === 'module' && token.type === Token.Identifier && token.value === 'await') { + tolerateUnexpectedToken(token); + } + + return node.finishIdentifier(token.value); + } + + function parseVariableDeclaration() { + var init = null, id, node = new Node(), params = []; + + id = parsePattern(params, 'var'); + + // ECMA-262 12.2.1 + if (strict && isRestrictedWord(id.name)) { + tolerateError(Messages.StrictVarName); + } + + if (match('=')) { + lex(); + init = isolateCoverGrammar(parseAssignmentExpression); + } else if (id.type !== Syntax.Identifier) { + expect('='); + } + + return node.finishVariableDeclarator(id, init); + } + + function parseVariableDeclarationList() { + var list = []; + + do { + list.push(parseVariableDeclaration()); + if (!match(',')) { + break; + } + lex(); + } while (startIndex < length); + + return list; + } + + function parseVariableStatement(node) { + var declarations; + + expectKeyword('var'); + + declarations = parseVariableDeclarationList(); + + consumeSemicolon(); + + return node.finishVariableDeclaration(declarations); + } + + // ECMA-262 13.3.1 Let and Const Declarations + + function parseLexicalBinding(kind, options) { + var init = null, id, node = new Node(), params = []; + + id = parsePattern(params, kind); + + // ECMA-262 12.2.1 + if (strict && id.type === Syntax.Identifier && isRestrictedWord(id.name)) { + tolerateError(Messages.StrictVarName); + } + + if (kind === 'const') { + if (!matchKeyword('in') && !matchContextualKeyword('of')) { + expect('='); + init = isolateCoverGrammar(parseAssignmentExpression); + } + } else if ((!options.inFor && id.type !== Syntax.Identifier) || match('=')) { + expect('='); + init = isolateCoverGrammar(parseAssignmentExpression); + } + + return node.finishVariableDeclarator(id, init); + } + + function parseBindingList(kind, options) { + var list = []; + + do { + list.push(parseLexicalBinding(kind, options)); + if (!match(',')) { + break; + } + lex(); + } while (startIndex < length); + + return list; + } + + function parseLexicalDeclaration(options) { + var kind, declarations, node = new Node(); + + kind = lex().value; + assert(kind === 'let' || kind === 'const', 'Lexical declaration must be either let or const'); + + declarations = parseBindingList(kind, options); + + consumeSemicolon(); + + return node.finishLexicalDeclaration(declarations, kind); + } + + function parseRestElement(params) { + var param, node = new Node(); + + lex(); + + if (match('{')) { + throwError(Messages.ObjectPatternAsRestParameter); + } + + params.push(lookahead); + + param = parseVariableIdentifier(); + + if (match('=')) { + throwError(Messages.DefaultRestParameter); + } + + if (!match(')')) { + throwError(Messages.ParameterAfterRestParameter); + } + + return node.finishRestElement(param); + } + + // ECMA-262 13.4 Empty Statement + + function parseEmptyStatement(node) { + expect(';'); + return node.finishEmptyStatement(); + } + + // ECMA-262 12.4 Expression Statement + + function parseExpressionStatement(node) { + var expr = parseExpression(); + consumeSemicolon(); + return node.finishExpressionStatement(expr); + } + + // ECMA-262 13.6 If statement + + function parseIfStatement(node) { + var test, consequent, alternate; + + expectKeyword('if'); + + expect('('); + + test = parseExpression(); + + expect(')'); + + consequent = parseStatement(); + + if (matchKeyword('else')) { + lex(); + alternate = parseStatement(); + } else { + alternate = null; + } + + return node.finishIfStatement(test, consequent, alternate); + } + + // ECMA-262 13.7 Iteration Statements + + function parseDoWhileStatement(node) { + var body, test, oldInIteration; + + expectKeyword('do'); + + oldInIteration = state.inIteration; + state.inIteration = true; + + body = parseStatement(); + + state.inIteration = oldInIteration; + + expectKeyword('while'); + + expect('('); + + test = parseExpression(); + + expect(')'); + + if (match(';')) { + lex(); + } + + return node.finishDoWhileStatement(body, test); + } + + function parseWhileStatement(node) { + var test, body, oldInIteration; + + expectKeyword('while'); + + expect('('); + + test = parseExpression(); + + expect(')'); + + oldInIteration = state.inIteration; + state.inIteration = true; + + body = parseStatement(); + + state.inIteration = oldInIteration; + + return node.finishWhileStatement(test, body); + } + + function parseForStatement(node) { + var init, forIn, initSeq, initStartToken, test, update, left, right, kind, declarations, + body, oldInIteration, previousAllowIn = state.allowIn; + + init = test = update = null; + forIn = true; + + expectKeyword('for'); + + expect('('); + + if (match(';')) { + lex(); + } else { + if (matchKeyword('var')) { + init = new Node(); + lex(); + + state.allowIn = false; + init = init.finishVariableDeclaration(parseVariableDeclarationList()); + state.allowIn = previousAllowIn; + + if (init.declarations.length === 1 && matchKeyword('in')) { + lex(); + left = init; + right = parseExpression(); + init = null; + } else if (init.declarations.length === 1 && init.declarations[0].init === null && matchContextualKeyword('of')) { + lex(); + left = init; + right = parseAssignmentExpression(); + init = null; + forIn = false; + } else { + expect(';'); + } + } else if (matchKeyword('const') || matchKeyword('let')) { + init = new Node(); + kind = lex().value; + + state.allowIn = false; + declarations = parseBindingList(kind, {inFor: true}); + state.allowIn = previousAllowIn; + + if (declarations.length === 1 && declarations[0].init === null && matchKeyword('in')) { + init = init.finishLexicalDeclaration(declarations, kind); + lex(); + left = init; + right = parseExpression(); + init = null; + } else if (declarations.length === 1 && declarations[0].init === null && matchContextualKeyword('of')) { + init = init.finishLexicalDeclaration(declarations, kind); + lex(); + left = init; + right = parseAssignmentExpression(); + init = null; + forIn = false; + } else { + consumeSemicolon(); + init = init.finishLexicalDeclaration(declarations, kind); + } + } else { + initStartToken = lookahead; + state.allowIn = false; + init = inheritCoverGrammar(parseAssignmentExpression); + state.allowIn = previousAllowIn; + + if (matchKeyword('in')) { + if (!isAssignmentTarget) { + tolerateError(Messages.InvalidLHSInForIn); + } + + lex(); + reinterpretExpressionAsPattern(init); + left = init; + right = parseExpression(); + init = null; + } else if (matchContextualKeyword('of')) { + if (!isAssignmentTarget) { + tolerateError(Messages.InvalidLHSInForLoop); + } + + lex(); + reinterpretExpressionAsPattern(init); + left = init; + right = parseAssignmentExpression(); + init = null; + forIn = false; + } else { + if (match(',')) { + initSeq = [init]; + while (match(',')) { + lex(); + initSeq.push(isolateCoverGrammar(parseAssignmentExpression)); + } + init = new WrappingNode(initStartToken).finishSequenceExpression(initSeq); + } + expect(';'); + } + } + } + + if (typeof left === 'undefined') { + + if (!match(';')) { + test = parseExpression(); + } + expect(';'); + + if (!match(')')) { + update = parseExpression(); + } + } + + expect(')'); + + oldInIteration = state.inIteration; + state.inIteration = true; + + body = isolateCoverGrammar(parseStatement); + + state.inIteration = oldInIteration; + + return (typeof left === 'undefined') ? + node.finishForStatement(init, test, update, body) : + forIn ? node.finishForInStatement(left, right, body) : + node.finishForOfStatement(left, right, body); + } + + // ECMA-262 13.8 The continue statement + + function parseContinueStatement(node) { + var label = null, key; + + expectKeyword('continue'); + + // Optimize the most common form: 'continue;'. + if (source.charCodeAt(startIndex) === 0x3B) { + lex(); + + if (!state.inIteration) { + throwError(Messages.IllegalContinue); + } + + return node.finishContinueStatement(null); + } + + if (hasLineTerminator) { + if (!state.inIteration) { + throwError(Messages.IllegalContinue); + } + + return node.finishContinueStatement(null); + } + + if (lookahead.type === Token.Identifier) { + label = parseVariableIdentifier(); + + key = '$' + label.name; + if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) { + throwError(Messages.UnknownLabel, label.name); + } + } + + consumeSemicolon(); + + if (label === null && !state.inIteration) { + throwError(Messages.IllegalContinue); + } + + return node.finishContinueStatement(label); + } + + // ECMA-262 13.9 The break statement + + function parseBreakStatement(node) { + var label = null, key; + + expectKeyword('break'); + + // Catch the very common case first: immediately a semicolon (U+003B). + if (source.charCodeAt(lastIndex) === 0x3B) { + lex(); + + if (!(state.inIteration || state.inSwitch)) { + throwError(Messages.IllegalBreak); + } + + return node.finishBreakStatement(null); + } + + if (hasLineTerminator) { + if (!(state.inIteration || state.inSwitch)) { + throwError(Messages.IllegalBreak); + } + + return node.finishBreakStatement(null); + } + + if (lookahead.type === Token.Identifier) { + label = parseVariableIdentifier(); + + key = '$' + label.name; + if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) { + throwError(Messages.UnknownLabel, label.name); + } + } + + consumeSemicolon(); + + if (label === null && !(state.inIteration || state.inSwitch)) { + throwError(Messages.IllegalBreak); + } + + return node.finishBreakStatement(label); + } + + // ECMA-262 13.10 The return statement + + function parseReturnStatement(node) { + var argument = null; + + expectKeyword('return'); + + if (!state.inFunctionBody) { + tolerateError(Messages.IllegalReturn); + } + + // 'return' followed by a space and an identifier is very common. + if (source.charCodeAt(lastIndex) === 0x20) { + if (isIdentifierStart(source.charCodeAt(lastIndex + 1))) { + argument = parseExpression(); + consumeSemicolon(); + return node.finishReturnStatement(argument); + } + } + + if (hasLineTerminator) { + // HACK + return node.finishReturnStatement(null); + } + + if (!match(';')) { + if (!match('}') && lookahead.type !== Token.EOF) { + argument = parseExpression(); + } + } + + consumeSemicolon(); + + return node.finishReturnStatement(argument); + } + + // ECMA-262 13.11 The with statement + + function parseWithStatement(node) { + var object, body; + + if (strict) { + tolerateError(Messages.StrictModeWith); + } + + expectKeyword('with'); + + expect('('); + + object = parseExpression(); + + expect(')'); + + body = parseStatement(); + + return node.finishWithStatement(object, body); + } + + // ECMA-262 13.12 The switch statement + + function parseSwitchCase() { + var test, consequent = [], statement, node = new Node(); + + if (matchKeyword('default')) { + lex(); + test = null; + } else { + expectKeyword('case'); + test = parseExpression(); + } + expect(':'); + + while (startIndex < length) { + if (match('}') || matchKeyword('default') || matchKeyword('case')) { + break; + } + statement = parseStatementListItem(); + consequent.push(statement); + } + + return node.finishSwitchCase(test, consequent); + } + + function parseSwitchStatement(node) { + var discriminant, cases, clause, oldInSwitch, defaultFound; + + expectKeyword('switch'); + + expect('('); + + discriminant = parseExpression(); + + expect(')'); + + expect('{'); + + cases = []; + + if (match('}')) { + lex(); + return node.finishSwitchStatement(discriminant, cases); + } + + oldInSwitch = state.inSwitch; + state.inSwitch = true; + defaultFound = false; + + while (startIndex < length) { + if (match('}')) { + break; + } + clause = parseSwitchCase(); + if (clause.test === null) { + if (defaultFound) { + throwError(Messages.MultipleDefaultsInSwitch); + } + defaultFound = true; + } + cases.push(clause); + } + + state.inSwitch = oldInSwitch; + + expect('}'); + + return node.finishSwitchStatement(discriminant, cases); + } + + // ECMA-262 13.14 The throw statement + + function parseThrowStatement(node) { + var argument; + + expectKeyword('throw'); + + if (hasLineTerminator) { + throwError(Messages.NewlineAfterThrow); + } + + argument = parseExpression(); + + consumeSemicolon(); + + return node.finishThrowStatement(argument); + } + + // ECMA-262 13.15 The try statement + + function parseCatchClause() { + var param, params = [], paramMap = {}, key, i, body, node = new Node(); + + expectKeyword('catch'); + + expect('('); + if (match(')')) { + throwUnexpectedToken(lookahead); + } + + param = parsePattern(params); + for (i = 0; i < params.length; i++) { + key = '$' + params[i].value; + if (Object.prototype.hasOwnProperty.call(paramMap, key)) { + tolerateError(Messages.DuplicateBinding, params[i].value); + } + paramMap[key] = true; + } + + // ECMA-262 12.14.1 + if (strict && isRestrictedWord(param.name)) { + tolerateError(Messages.StrictCatchVariable); + } + + expect(')'); + body = parseBlock(); + return node.finishCatchClause(param, body); + } + + function parseTryStatement(node) { + var block, handler = null, finalizer = null; + + expectKeyword('try'); + + block = parseBlock(); + + if (matchKeyword('catch')) { + handler = parseCatchClause(); + } + + if (matchKeyword('finally')) { + lex(); + finalizer = parseBlock(); + } + + if (!handler && !finalizer) { + throwError(Messages.NoCatchOrFinally); + } + + return node.finishTryStatement(block, handler, finalizer); + } + + // ECMA-262 13.16 The debugger statement + + function parseDebuggerStatement(node) { + expectKeyword('debugger'); + + consumeSemicolon(); + + return node.finishDebuggerStatement(); + } + + // 13 Statements + + function parseStatement() { + var type = lookahead.type, + expr, + labeledBody, + key, + node; + + if (type === Token.EOF) { + throwUnexpectedToken(lookahead); + } + + if (type === Token.Punctuator && lookahead.value === '{') { + return parseBlock(); + } + isAssignmentTarget = isBindingElement = true; + node = new Node(); + + if (type === Token.Punctuator) { + switch (lookahead.value) { + case ';': + return parseEmptyStatement(node); + case '(': + return parseExpressionStatement(node); + default: + break; + } + } else if (type === Token.Keyword) { + switch (lookahead.value) { + case 'break': + return parseBreakStatement(node); + case 'continue': + return parseContinueStatement(node); + case 'debugger': + return parseDebuggerStatement(node); + case 'do': + return parseDoWhileStatement(node); + case 'for': + return parseForStatement(node); + case 'function': + return parseFunctionDeclaration(node); + case 'if': + return parseIfStatement(node); + case 'return': + return parseReturnStatement(node); + case 'switch': + return parseSwitchStatement(node); + case 'throw': + return parseThrowStatement(node); + case 'try': + return parseTryStatement(node); + case 'var': + return parseVariableStatement(node); + case 'while': + return parseWhileStatement(node); + case 'with': + return parseWithStatement(node); + default: + break; + } + } + + expr = parseExpression(); + + // ECMA-262 12.12 Labelled Statements + if ((expr.type === Syntax.Identifier) && match(':')) { + lex(); + + key = '$' + expr.name; + if (Object.prototype.hasOwnProperty.call(state.labelSet, key)) { + throwError(Messages.Redeclaration, 'Label', expr.name); + } + + state.labelSet[key] = true; + labeledBody = parseStatement(); + delete state.labelSet[key]; + return node.finishLabeledStatement(expr, labeledBody); + } + + consumeSemicolon(); + + return node.finishExpressionStatement(expr); + } + + // ECMA-262 14.1 Function Definition + + function parseFunctionSourceElements() { + var statement, body = [], token, directive, firstRestricted, + oldLabelSet, oldInIteration, oldInSwitch, oldInFunctionBody, oldParenthesisCount, + node = new Node(); + + expect('{'); + + while (startIndex < length) { + if (lookahead.type !== Token.StringLiteral) { + break; + } + token = lookahead; + + statement = parseStatementListItem(); + body.push(statement); + if (statement.expression.type !== Syntax.Literal) { + // this is not directive + break; + } + directive = source.slice(token.start + 1, token.end - 1); + if (directive === 'use strict') { + strict = true; + if (firstRestricted) { + tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral); + } + } else { + if (!firstRestricted && token.octal) { + firstRestricted = token; + } + } + } + + oldLabelSet = state.labelSet; + oldInIteration = state.inIteration; + oldInSwitch = state.inSwitch; + oldInFunctionBody = state.inFunctionBody; + oldParenthesisCount = state.parenthesizedCount; + + state.labelSet = {}; + state.inIteration = false; + state.inSwitch = false; + state.inFunctionBody = true; + state.parenthesizedCount = 0; + + while (startIndex < length) { + if (match('}')) { + break; + } + body.push(parseStatementListItem()); + } + + expect('}'); + + state.labelSet = oldLabelSet; + state.inIteration = oldInIteration; + state.inSwitch = oldInSwitch; + state.inFunctionBody = oldInFunctionBody; + state.parenthesizedCount = oldParenthesisCount; + + return node.finishBlockStatement(body); + } + + function validateParam(options, param, name) { + var key = '$' + name; + if (strict) { + if (isRestrictedWord(name)) { + options.stricted = param; + options.message = Messages.StrictParamName; + } + if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) { + options.stricted = param; + options.message = Messages.StrictParamDupe; + } + } else if (!options.firstRestricted) { + if (isRestrictedWord(name)) { + options.firstRestricted = param; + options.message = Messages.StrictParamName; + } else if (isStrictModeReservedWord(name)) { + options.firstRestricted = param; + options.message = Messages.StrictReservedWord; + } else if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) { + options.stricted = param; + options.message = Messages.StrictParamDupe; + } + } + options.paramSet[key] = true; + } + + function parseParam(options) { + var token, param, params = [], i, def; + + token = lookahead; + if (token.value === '...') { + param = parseRestElement(params); + validateParam(options, param.argument, param.argument.name); + options.params.push(param); + options.defaults.push(null); + return false; + } + + param = parsePatternWithDefault(params); + for (i = 0; i < params.length; i++) { + validateParam(options, params[i], params[i].value); + } + + if (param.type === Syntax.AssignmentPattern) { + def = param.right; + param = param.left; + ++options.defaultCount; + } + + options.params.push(param); + options.defaults.push(def); + + return !match(')'); + } + + function parseParams(firstRestricted) { + var options; + + options = { + params: [], + defaultCount: 0, + defaults: [], + firstRestricted: firstRestricted + }; + + expect('('); + + if (!match(')')) { + options.paramSet = {}; + while (startIndex < length) { + if (!parseParam(options)) { + break; + } + expect(','); + } + } + + expect(')'); + + if (options.defaultCount === 0) { + options.defaults = []; + } + + return { + params: options.params, + defaults: options.defaults, + stricted: options.stricted, + firstRestricted: options.firstRestricted, + message: options.message + }; + } + + function parseFunctionDeclaration(node, identifierIsOptional) { + var id = null, params = [], defaults = [], body, token, stricted, tmp, firstRestricted, message, previousStrict, + isGenerator, previousAllowYield; + + previousAllowYield = state.allowYield; + + expectKeyword('function'); + + isGenerator = match('*'); + if (isGenerator) { + lex(); + } + + if (!identifierIsOptional || !match('(')) { + token = lookahead; + id = parseVariableIdentifier(); + if (strict) { + if (isRestrictedWord(token.value)) { + tolerateUnexpectedToken(token, Messages.StrictFunctionName); + } + } else { + if (isRestrictedWord(token.value)) { + firstRestricted = token; + message = Messages.StrictFunctionName; + } else if (isStrictModeReservedWord(token.value)) { + firstRestricted = token; + message = Messages.StrictReservedWord; + } + } + } + + state.allowYield = !isGenerator; + tmp = parseParams(firstRestricted); + params = tmp.params; + defaults = tmp.defaults; + stricted = tmp.stricted; + firstRestricted = tmp.firstRestricted; + if (tmp.message) { + message = tmp.message; + } + + + previousStrict = strict; + body = parseFunctionSourceElements(); + if (strict && firstRestricted) { + throwUnexpectedToken(firstRestricted, message); + } + if (strict && stricted) { + tolerateUnexpectedToken(stricted, message); + } + + strict = previousStrict; + state.allowYield = previousAllowYield; + + return node.finishFunctionDeclaration(id, params, defaults, body, isGenerator); + } + + function parseFunctionExpression() { + var token, id = null, stricted, firstRestricted, message, tmp, + params = [], defaults = [], body, previousStrict, node = new Node(), + isGenerator, previousAllowYield; + + previousAllowYield = state.allowYield; + + expectKeyword('function'); + + isGenerator = match('*'); + if (isGenerator) { + lex(); + } + + state.allowYield = !isGenerator; + if (!match('(')) { + token = lookahead; + id = (!strict && !isGenerator && matchKeyword('yield')) ? parseNonComputedProperty() : parseVariableIdentifier(); + if (strict) { + if (isRestrictedWord(token.value)) { + tolerateUnexpectedToken(token, Messages.StrictFunctionName); + } + } else { + if (isRestrictedWord(token.value)) { + firstRestricted = token; + message = Messages.StrictFunctionName; + } else if (isStrictModeReservedWord(token.value)) { + firstRestricted = token; + message = Messages.StrictReservedWord; + } + } + } + + tmp = parseParams(firstRestricted); + params = tmp.params; + defaults = tmp.defaults; + stricted = tmp.stricted; + firstRestricted = tmp.firstRestricted; + if (tmp.message) { + message = tmp.message; + } + + previousStrict = strict; + body = parseFunctionSourceElements(); + if (strict && firstRestricted) { + throwUnexpectedToken(firstRestricted, message); + } + if (strict && stricted) { + tolerateUnexpectedToken(stricted, message); + } + strict = previousStrict; + state.allowYield = previousAllowYield; + + return node.finishFunctionExpression(id, params, defaults, body, isGenerator); + } + + // ECMA-262 14.5 Class Definitions + + function parseClassBody() { + var classBody, token, isStatic, hasConstructor = false, body, method, computed, key; + + classBody = new Node(); + + expect('{'); + body = []; + while (!match('}')) { + if (match(';')) { + lex(); + } else { + method = new Node(); + token = lookahead; + isStatic = false; + computed = match('['); + if (match('*')) { + lex(); + } else { + key = parseObjectPropertyKey(); + if (key.name === 'static' && (lookaheadPropertyName() || match('*'))) { + token = lookahead; + isStatic = true; + computed = match('['); + if (match('*')) { + lex(); + } else { + key = parseObjectPropertyKey(); + } + } + } + method = tryParseMethodDefinition(token, key, computed, method); + if (method) { + method['static'] = isStatic; // jscs:ignore requireDotNotation + if (method.kind === 'init') { + method.kind = 'method'; + } + if (!isStatic) { + if (!method.computed && (method.key.name || method.key.value.toString()) === 'constructor') { + if (method.kind !== 'method' || !method.method || method.value.generator) { + throwUnexpectedToken(token, Messages.ConstructorSpecialMethod); + } + if (hasConstructor) { + throwUnexpectedToken(token, Messages.DuplicateConstructor); + } else { + hasConstructor = true; + } + method.kind = 'constructor'; + } + } else { + if (!method.computed && (method.key.name || method.key.value.toString()) === 'prototype') { + throwUnexpectedToken(token, Messages.StaticPrototype); + } + } + method.type = Syntax.MethodDefinition; + delete method.method; + delete method.shorthand; + body.push(method); + } else { + throwUnexpectedToken(lookahead); + } + } + } + lex(); + return classBody.finishClassBody(body); + } + + function parseClassDeclaration(identifierIsOptional) { + var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict; + strict = true; + + expectKeyword('class'); + + if (!identifierIsOptional || lookahead.type === Token.Identifier) { + id = parseVariableIdentifier(); + } + + if (matchKeyword('extends')) { + lex(); + superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall); + } + classBody = parseClassBody(); + strict = previousStrict; + + return classNode.finishClassDeclaration(id, superClass, classBody); + } + + function parseClassExpression() { + var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict; + strict = true; + + expectKeyword('class'); + + if (lookahead.type === Token.Identifier) { + id = parseVariableIdentifier(); + } + + if (matchKeyword('extends')) { + lex(); + superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall); + } + classBody = parseClassBody(); + strict = previousStrict; + + return classNode.finishClassExpression(id, superClass, classBody); + } + + // ECMA-262 15.2 Modules + + function parseModuleSpecifier() { + var node = new Node(); + + if (lookahead.type !== Token.StringLiteral) { + throwError(Messages.InvalidModuleSpecifier); + } + return node.finishLiteral(lex()); + } + + // ECMA-262 15.2.3 Exports + + function parseExportSpecifier() { + var exported, local, node = new Node(), def; + if (matchKeyword('default')) { + // export {default} from 'something'; + def = new Node(); + lex(); + local = def.finishIdentifier('default'); + } else { + local = parseVariableIdentifier(); + } + if (matchContextualKeyword('as')) { + lex(); + exported = parseNonComputedProperty(); + } + return node.finishExportSpecifier(local, exported); + } + + function parseExportNamedDeclaration(node) { + var declaration = null, + isExportFromIdentifier, + src = null, specifiers = []; + + // non-default export + if (lookahead.type === Token.Keyword) { + // covers: + // export var f = 1; + switch (lookahead.value) { + case 'let': + case 'const': + case 'var': + case 'class': + case 'function': + declaration = parseStatementListItem(); + return node.finishExportNamedDeclaration(declaration, specifiers, null); + } + } + + expect('{'); + while (!match('}')) { + isExportFromIdentifier = isExportFromIdentifier || matchKeyword('default'); + specifiers.push(parseExportSpecifier()); + if (!match('}')) { + expect(','); + if (match('}')) { + break; + } + } + } + expect('}'); + + if (matchContextualKeyword('from')) { + // covering: + // export {default} from 'foo'; + // export {foo} from 'foo'; + lex(); + src = parseModuleSpecifier(); + consumeSemicolon(); + } else if (isExportFromIdentifier) { + // covering: + // export {default}; // missing fromClause + throwError(lookahead.value ? + Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value); + } else { + // cover + // export {foo}; + consumeSemicolon(); + } + return node.finishExportNamedDeclaration(declaration, specifiers, src); + } + + function parseExportDefaultDeclaration(node) { + var declaration = null, + expression = null; + + // covers: + // export default ... + expectKeyword('default'); + + if (matchKeyword('function')) { + // covers: + // export default function foo () {} + // export default function () {} + declaration = parseFunctionDeclaration(new Node(), true); + return node.finishExportDefaultDeclaration(declaration); + } + if (matchKeyword('class')) { + declaration = parseClassDeclaration(true); + return node.finishExportDefaultDeclaration(declaration); + } + + if (matchContextualKeyword('from')) { + throwError(Messages.UnexpectedToken, lookahead.value); + } + + // covers: + // export default {}; + // export default []; + // export default (1 + 2); + if (match('{')) { + expression = parseObjectInitializer(); + } else if (match('[')) { + expression = parseArrayInitializer(); + } else { + expression = parseAssignmentExpression(); + } + consumeSemicolon(); + return node.finishExportDefaultDeclaration(expression); + } + + function parseExportAllDeclaration(node) { + var src; + + // covers: + // export * from 'foo'; + expect('*'); + if (!matchContextualKeyword('from')) { + throwError(lookahead.value ? + Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value); + } + lex(); + src = parseModuleSpecifier(); + consumeSemicolon(); + + return node.finishExportAllDeclaration(src); + } + + function parseExportDeclaration() { + var node = new Node(); + if (state.inFunctionBody) { + throwError(Messages.IllegalExportDeclaration); + } + + expectKeyword('export'); + + if (matchKeyword('default')) { + return parseExportDefaultDeclaration(node); + } + if (match('*')) { + return parseExportAllDeclaration(node); + } + return parseExportNamedDeclaration(node); + } + + // ECMA-262 15.2.2 Imports + + function parseImportSpecifier() { + // import {} ...; + var local, imported, node = new Node(); + + imported = parseNonComputedProperty(); + if (matchContextualKeyword('as')) { + lex(); + local = parseVariableIdentifier(); + } + + return node.finishImportSpecifier(local, imported); + } + + function parseNamedImports() { + var specifiers = []; + // {foo, bar as bas} + expect('{'); + while (!match('}')) { + specifiers.push(parseImportSpecifier()); + if (!match('}')) { + expect(','); + if (match('}')) { + break; + } + } + } + expect('}'); + return specifiers; + } + + function parseImportDefaultSpecifier() { + // import ...; + var local, node = new Node(); + + local = parseNonComputedProperty(); + + return node.finishImportDefaultSpecifier(local); + } + + function parseImportNamespaceSpecifier() { + // import <* as foo> ...; + var local, node = new Node(); + + expect('*'); + if (!matchContextualKeyword('as')) { + throwError(Messages.NoAsAfterImportNamespace); + } + lex(); + local = parseNonComputedProperty(); + + return node.finishImportNamespaceSpecifier(local); + } + + function parseImportDeclaration() { + var specifiers = [], src, node = new Node(); + + if (state.inFunctionBody) { + throwError(Messages.IllegalImportDeclaration); + } + + expectKeyword('import'); + + if (lookahead.type === Token.StringLiteral) { + // import 'foo'; + src = parseModuleSpecifier(); + } else { + + if (match('{')) { + // import {bar} + specifiers = specifiers.concat(parseNamedImports()); + } else if (match('*')) { + // import * as foo + specifiers.push(parseImportNamespaceSpecifier()); + } else if (isIdentifierName(lookahead) && !matchKeyword('default')) { + // import foo + specifiers.push(parseImportDefaultSpecifier()); + if (match(',')) { + lex(); + if (match('*')) { + // import foo, * as foo + specifiers.push(parseImportNamespaceSpecifier()); + } else if (match('{')) { + // import foo, {bar} + specifiers = specifiers.concat(parseNamedImports()); + } else { + throwUnexpectedToken(lookahead); + } + } + } else { + throwUnexpectedToken(lex()); + } + + if (!matchContextualKeyword('from')) { + throwError(lookahead.value ? + Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value); + } + lex(); + src = parseModuleSpecifier(); + } + + consumeSemicolon(); + return node.finishImportDeclaration(specifiers, src); + } + + // ECMA-262 15.1 Scripts + + function parseScriptBody() { + var statement, body = [], token, directive, firstRestricted; + + while (startIndex < length) { + token = lookahead; + if (token.type !== Token.StringLiteral) { + break; + } + + statement = parseStatementListItem(); + body.push(statement); + if (statement.expression.type !== Syntax.Literal) { + // this is not directive + break; + } + directive = source.slice(token.start + 1, token.end - 1); + if (directive === 'use strict') { + strict = true; + if (firstRestricted) { + tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral); + } + } else { + if (!firstRestricted && token.octal) { + firstRestricted = token; + } + } + } + + while (startIndex < length) { + statement = parseStatementListItem(); + /* istanbul ignore if */ + if (typeof statement === 'undefined') { + break; + } + body.push(statement); + } + return body; + } + + function parseProgram() { + var body, node; + + peek(); + node = new Node(); + + body = parseScriptBody(); + return node.finishProgram(body, state.sourceType); + } + + function filterTokenLocation() { + var i, entry, token, tokens = []; + + for (i = 0; i < extra.tokens.length; ++i) { + entry = extra.tokens[i]; + token = { + type: entry.type, + value: entry.value + }; + if (entry.regex) { + token.regex = { + pattern: entry.regex.pattern, + flags: entry.regex.flags + }; + } + if (extra.range) { + token.range = entry.range; + } + if (extra.loc) { + token.loc = entry.loc; + } + tokens.push(token); + } + + extra.tokens = tokens; + } + + function tokenize(code, options) { + var toString, + tokens; + + toString = String; + if (typeof code !== 'string' && !(code instanceof String)) { + code = toString(code); + } + + source = code; + index = 0; + lineNumber = (source.length > 0) ? 1 : 0; + lineStart = 0; + startIndex = index; + startLineNumber = lineNumber; + startLineStart = lineStart; + length = source.length; + lookahead = null; + state = { + allowIn: true, + allowYield: true, + labelSet: {}, + inFunctionBody: false, + inIteration: false, + inSwitch: false, + lastCommentStart: -1, + curlyStack: [] + }; + + extra = {}; + + // Options matching. + options = options || {}; + + // Of course we collect tokens here. + options.tokens = true; + extra.tokens = []; + extra.tokenize = true; + // The following two fields are necessary to compute the Regex tokens. + extra.openParenToken = -1; + extra.openCurlyToken = -1; + + extra.range = (typeof options.range === 'boolean') && options.range; + extra.loc = (typeof options.loc === 'boolean') && options.loc; + + if (typeof options.comment === 'boolean' && options.comment) { + extra.comments = []; + } + if (typeof options.tolerant === 'boolean' && options.tolerant) { + extra.errors = []; + } + + try { + peek(); + if (lookahead.type === Token.EOF) { + return extra.tokens; + } + + lex(); + while (lookahead.type !== Token.EOF) { + try { + lex(); + } catch (lexError) { + if (extra.errors) { + recordError(lexError); + // We have to break on the first error + // to avoid infinite loops. + break; + } else { + throw lexError; + } + } + } + + filterTokenLocation(); + tokens = extra.tokens; + if (typeof extra.comments !== 'undefined') { + tokens.comments = extra.comments; + } + if (typeof extra.errors !== 'undefined') { + tokens.errors = extra.errors; + } + } catch (e) { + throw e; + } finally { + extra = {}; + } + return tokens; + } + + function parse(code, options) { + var program, toString; + + toString = String; + if (typeof code !== 'string' && !(code instanceof String)) { + code = toString(code); + } + + source = code; + index = 0; + lineNumber = (source.length > 0) ? 1 : 0; + lineStart = 0; + startIndex = index; + startLineNumber = lineNumber; + startLineStart = lineStart; + length = source.length; + lookahead = null; + state = { + allowIn: true, + allowYield: true, + labelSet: {}, + inFunctionBody: false, + inIteration: false, + inSwitch: false, + lastCommentStart: -1, + curlyStack: [], + sourceType: 'script' + }; + strict = false; + + extra = {}; + if (typeof options !== 'undefined') { + extra.range = (typeof options.range === 'boolean') && options.range; + extra.loc = (typeof options.loc === 'boolean') && options.loc; + extra.attachComment = (typeof options.attachComment === 'boolean') && options.attachComment; + + if (extra.loc && options.source !== null && options.source !== undefined) { + extra.source = toString(options.source); + } + + if (typeof options.tokens === 'boolean' && options.tokens) { + extra.tokens = []; + } + if (typeof options.comment === 'boolean' && options.comment) { + extra.comments = []; + } + if (typeof options.tolerant === 'boolean' && options.tolerant) { + extra.errors = []; + } + if (extra.attachComment) { + extra.range = true; + extra.comments = []; + extra.bottomRightStack = []; + extra.trailingComments = []; + extra.leadingComments = []; + } + if (options.sourceType === 'module') { + // very restrictive condition for now + state.sourceType = options.sourceType; + strict = true; + } + } + + try { + program = parseProgram(); + if (typeof extra.comments !== 'undefined') { + program.comments = extra.comments; + } + if (typeof extra.tokens !== 'undefined') { + filterTokenLocation(); + program.tokens = extra.tokens; + } + if (typeof extra.errors !== 'undefined') { + program.errors = extra.errors; + } + } catch (e) { + throw e; + } finally { + extra = {}; + } + + return program; + } + + // Sync with *.json manifests. + exports.version = '2.5.0'; + + exports.tokenize = tokenize; + + exports.parse = parse; + + // Deep copy. + /* istanbul ignore next */ + exports.Syntax = (function () { + var name, types = {}; + + if (typeof Object.create === 'function') { + types = Object.create(null); + } + + for (name in Syntax) { + if (Syntax.hasOwnProperty(name)) { + types[name] = Syntax[name]; + } + } + + if (typeof Object.freeze === 'function') { + Object.freeze(types); + } + + return types; + }()); + +})); +/* vim: set sw=4 ts=4 et tw=80 : */ \ No newline at end of file diff --git a/test/api.js b/test/api.js index 86c7c786..cefbd4da 100644 --- a/test/api.js +++ b/test/api.js @@ -24,7 +24,7 @@ 'use strict'; -var esprima = require('./3rdparty/esprima'), +var esprima = require('./3rdparty/esprima-1.0.0-dev'), escodegen = require('./loader'), chai = require('chai'), expect = chai.expect, diff --git a/test/ast.js b/test/ast.js index aed43a56..a0f2fc7b 100644 --- a/test/ast.js +++ b/test/ast.js @@ -25,7 +25,7 @@ 'use strict'; var data, - esprima = require('./3rdparty/esprima'), + esprima = require('./3rdparty/esprima-1.0.0-dev'), escodegen = require('./loader'), chai = require('chai'), expect = chai.expect; diff --git a/test/compare-esprima2.js b/test/compare-esprima2.js new file mode 100644 index 00000000..4a965580 --- /dev/null +++ b/test/compare-esprima2.js @@ -0,0 +1,106 @@ +/* + Copyright (C) 2012-2013 Yusuke Suzuki + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY + DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +'use strict'; + +var fs = require('fs'), + esprima = require('./3rdparty/esprima-2.5.0'), + escodegen = require('./loader'), + chai = require('chai'), + expect = chai.expect, + DIR = 'compare-esprima2'; + +function test(code, expected) { + var tree, actual, options, StringObject; + + // alias, so that JSLint does not complain. + StringObject = String; + + options = { + range: true, + loc: false, + tokens: true, + raw: false, + comment: true, + sourceType: 'module' + }; + + tree = esprima.parse(code, options); + + // for UNIX text comment + actual = escodegen.generate(tree).replace(/[\n\r]$/, '') + '\n'; + expect(actual).to.be.equal(expected); +} + +function testMin(code, expected) { + var tree, tree2, actual, actual2, options, StringObject; + + // alias, so that JSLint does not complain. + StringObject = String; + + options = { + range: true, + loc: false, + tokens: true, + raw: false, + sourceType: 'module' + }; + + tree = esprima.parse(code, options); + + // for UNIX text comment + actual = escodegen.generate(tree, { + format: escodegen.FORMAT_MINIFY, + raw: false + }).replace(/[\n\r]$/, '') + '\n'; + expect(actual).to.be.equal(expected); + + // And ensure that minified value is exactly equal. + tree2 = esprima.parse(actual, options); + actual2 = escodegen.generate(tree2, { + format: escodegen.FORMAT_MINIFY, + raw: false + }).replace(/[\n\r]$/, '') + '\n'; + expect(actual2).to.be.equal(actual); +} + +describe('compare esprima 2 test', function () { + fs.readdirSync(__dirname + '/' + DIR).sort().forEach(function(file) { + var code, expected, exp, min; + if (/\.js$/.test(file) && !/expected\.js$/.test(file) && !/expected\.min\.js$/.test(file)) { + it(file, function () { + exp = file.replace(/\.js$/, '.expected.js'); + min = file.replace(/\.js$/, '.expected.min.js'); + code = fs.readFileSync(__dirname + '/' + DIR + '/' + file, 'utf-8'); + expected = fs.readFileSync(__dirname + '/' + DIR + '/' + exp, 'utf-8'); + test(code, expected); + if (fs.existsSync(__dirname + '/' + DIR + '/' + min)) { + expected = fs.readFileSync(__dirname + '/' + DIR + '/' + min, 'utf-8'); + testMin(code, expected); + } + }); + } + }); +}); +/* vim: set sw=4 ts=4 et tw=80 : */ diff --git a/test/compare-esprima2/export-default-declaration.expected.js b/test/compare-esprima2/export-default-declaration.expected.js new file mode 100644 index 00000000..20102028 --- /dev/null +++ b/test/compare-esprima2/export-default-declaration.expected.js @@ -0,0 +1,2 @@ +export default function a() { +} diff --git a/test/compare-esprima2/export-default-declaration.expected.min.js b/test/compare-esprima2/export-default-declaration.expected.min.js new file mode 100644 index 00000000..4c00c1fc --- /dev/null +++ b/test/compare-esprima2/export-default-declaration.expected.min.js @@ -0,0 +1 @@ +export default function a(){} diff --git a/test/compare-esprima2/export-default-declaration.js b/test/compare-esprima2/export-default-declaration.js new file mode 100644 index 00000000..5ef9d4be --- /dev/null +++ b/test/compare-esprima2/export-default-declaration.js @@ -0,0 +1,3 @@ +export default function a () { } +// export default var i = 20; +// export default const K = 20; diff --git a/test/compare-esprima2/import-with-default.expected.js b/test/compare-esprima2/import-with-default.expected.js new file mode 100644 index 00000000..75d9a1fc --- /dev/null +++ b/test/compare-esprima2/import-with-default.expected.js @@ -0,0 +1,8 @@ +import foo from 'foo'; +import foo, * as foo from 'foo'; +import * as foo from 'foo'; +import ok, { + foo, + test, + logging +} from 'foo'; diff --git a/test/compare-esprima2/import-with-default.expected.min.js b/test/compare-esprima2/import-with-default.expected.min.js new file mode 100644 index 00000000..9541f438 --- /dev/null +++ b/test/compare-esprima2/import-with-default.expected.min.js @@ -0,0 +1 @@ +import foo from'foo';import foo,*as foo from'foo';import*as foo from'foo';import ok,{foo,test,logging}from'foo' diff --git a/test/compare-esprima2/import-with-default.js b/test/compare-esprima2/import-with-default.js new file mode 100644 index 00000000..75d9a1fc --- /dev/null +++ b/test/compare-esprima2/import-with-default.js @@ -0,0 +1,8 @@ +import foo from 'foo'; +import foo, * as foo from 'foo'; +import * as foo from 'foo'; +import ok, { + foo, + test, + logging +} from 'foo'; diff --git a/test/compare.js b/test/compare.js index d27199a0..288b280a 100644 --- a/test/compare.js +++ b/test/compare.js @@ -25,7 +25,7 @@ 'use strict'; var fs = require('fs'), - esprima = require('./3rdparty/esprima'), + esprima = require('./3rdparty/esprima-1.0.0-dev'), escodegen = require('./loader'), chai = require('chai'), expect = chai.expect; diff --git a/test/directive.js b/test/directive.js index 8f991b75..b23dcd75 100644 --- a/test/directive.js +++ b/test/directive.js @@ -24,7 +24,7 @@ 'use strict'; -var esprima = require('./3rdparty/esprima'), +var esprima = require('./3rdparty/esprima-1.0.0-dev'), escodegen = require('./loader'), chai = require('chai'), expect = chai.expect, diff --git a/test/identity.js b/test/identity.js index 3aa076e1..0d8fb6d0 100644 --- a/test/identity.js +++ b/test/identity.js @@ -25,7 +25,7 @@ 'use strict'; var fs = require('fs'), - esprima = require('./3rdparty/esprima'), + esprima = require('./3rdparty/esprima-1.0.0-dev'), escodegen = require('./loader'), chai = require('chai'), expect = chai.expect, diff --git a/test/options.js b/test/options.js index 874133dd..1acbced4 100644 --- a/test/options.js +++ b/test/options.js @@ -25,7 +25,7 @@ 'use strict'; -var esprima = require('./3rdparty/esprima'), +var esprima = require('./3rdparty/esprima-1.0.0-dev'), escodegen = require('./loader'), chai = require('chai'), expect = chai.expect, diff --git a/test/source-map.js b/test/source-map.js index 839b22c1..8f6f2150 100644 --- a/test/source-map.js +++ b/test/source-map.js @@ -25,7 +25,7 @@ 'use strict'; -var esprima = require('./3rdparty/esprima'), +var esprima = require('./3rdparty/esprima-1.0.0-dev'), escodegen = require('./loader'), sourcemap = require('source-map'), chai = require('chai'), diff --git a/test/test.js b/test/test.js index b0e87992..a21cd487 100644 --- a/test/test.js +++ b/test/test.js @@ -30,7 +30,7 @@ 'use strict'; -var esprima = require('./3rdparty/esprima'), +var esprima = require('./3rdparty/esprima-1.0.0-dev'), escodegen = require('./loader'), chai = require('chai'), expect = chai.expect, diff --git a/test/verbatim.js b/test/verbatim.js index b1fd95c5..0039fe34 100644 --- a/test/verbatim.js +++ b/test/verbatim.js @@ -24,7 +24,7 @@ 'use strict'; -var esprima = require('./3rdparty/esprima'), +var esprima = require('./3rdparty/esprima-1.0.0-dev'), escodegen = require('./loader'), chai = require('chai'), expect = chai.expect, From c3ecceffc3ba151fd2d48c8ba9c1b84d4c46c4ab Mon Sep 17 00:00:00 2001 From: Francisco Ryan Tolmasky I Date: Fri, 4 Sep 2015 20:48:56 -0700 Subject: [PATCH 13/78] Fix for supporting AssignmentPattern. Closes #229. Reviewed by @tolmasky. --- escodegen.js | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/escodegen.js b/escodegen.js index c6957763..fe555d3f 100644 --- a/escodegen.js +++ b/escodegen.js @@ -2190,6 +2190,10 @@ return result; }, + AssignmentPattern: function(expr, precedence, flags) { + return this.generateAssignment(expr.left, expr.right, expr.operator, precedence, flags); + }, + ObjectPattern: function (expr, precedence, flags) { var result, i, iz, multiline, property, that = this; if (!expr.properties.length) { From 3fde4c3dc677273a3a561b5fcb74934b67249d44 Mon Sep 17 00:00:00 2001 From: Francisco Ryan Tolmasky I Date: Fri, 4 Sep 2015 21:05:36 -0700 Subject: [PATCH 14/78] Add assignment pattern tests. Reviewed by @tolmasky. --- test/compare-acorn-es6/assignment-pattern.expected.js | 2 ++ test/compare-acorn-es6/assignment-pattern.expected.min.js | 1 + test/compare-acorn-es6/assignment-pattern.js | 3 +++ 3 files changed, 6 insertions(+) create mode 100644 test/compare-acorn-es6/assignment-pattern.expected.js create mode 100644 test/compare-acorn-es6/assignment-pattern.expected.min.js create mode 100644 test/compare-acorn-es6/assignment-pattern.js diff --git a/test/compare-acorn-es6/assignment-pattern.expected.js b/test/compare-acorn-es6/assignment-pattern.expected.js new file mode 100644 index 00000000..0503132c --- /dev/null +++ b/test/compare-acorn-es6/assignment-pattern.expected.js @@ -0,0 +1,2 @@ +function x(a = { a: 6 }, b = null, ...d) { +} diff --git a/test/compare-acorn-es6/assignment-pattern.expected.min.js b/test/compare-acorn-es6/assignment-pattern.expected.min.js new file mode 100644 index 00000000..1403c62e --- /dev/null +++ b/test/compare-acorn-es6/assignment-pattern.expected.min.js @@ -0,0 +1 @@ +function x(a={a:6},b=null,...d){} diff --git a/test/compare-acorn-es6/assignment-pattern.js b/test/compare-acorn-es6/assignment-pattern.js new file mode 100644 index 00000000..34e09f9b --- /dev/null +++ b/test/compare-acorn-es6/assignment-pattern.js @@ -0,0 +1,3 @@ +function x(a={a:6}, b=null, ...d) +{ +} From 5dabbc5441b396febd0afb9252a9afdfa7051657 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Sun, 6 Sep 2015 09:35:15 -0700 Subject: [PATCH 15/78] version 1.7.0 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 4f21f69f..852608eb 100644 --- a/package.json +++ b/package.json @@ -15,7 +15,7 @@ "escodegen.js", "package.json" ], - "version": "1.6.1", + "version": "1.7.0", "engines": { "node": ">=0.10.0" }, From b99a20005fcc868c3326408eef6fed0b586f9bec Mon Sep 17 00:00:00 2001 From: adamjmcgrath Date: Thu, 24 Sep 2015 14:29:59 +0100 Subject: [PATCH 16/78] Fix Import variable binding for esprima 2, eg `import {foo as bar} from "baz";` --- escodegen.js | 8 +++++--- test/compare-esprima2/import-with-default.expected.js | 4 ++-- test/compare-esprima2/import-with-default.expected.min.js | 2 +- test/compare-esprima2/import-with-default.js | 4 ++-- 4 files changed, 10 insertions(+), 8 deletions(-) diff --git a/escodegen.js b/escodegen.js index c6957763..8f98fbc6 100644 --- a/escodegen.js +++ b/escodegen.js @@ -2262,9 +2262,11 @@ }, ExportSpecifier: function (expr, precedence, flags) { - var result = [ (expr.id || expr.local).name ]; - if (expr.name) { - result.push(noEmptySpace() + 'as' + noEmptySpace() + generateIdentifier(expr.name)); + var exported = (expr.id || expr.imported).name; + var result = [ exported ]; + var id = expr.name || expr.local; + if (id && id.name !== exported) { + result.push(noEmptySpace() + 'as' + noEmptySpace() + generateIdentifier(id)); } return result; }, diff --git a/test/compare-esprima2/import-with-default.expected.js b/test/compare-esprima2/import-with-default.expected.js index 75d9a1fc..5e55c4ff 100644 --- a/test/compare-esprima2/import-with-default.expected.js +++ b/test/compare-esprima2/import-with-default.expected.js @@ -2,7 +2,7 @@ import foo from 'foo'; import foo, * as foo from 'foo'; import * as foo from 'foo'; import ok, { - foo, - test, + foo as bar, + test as testing, logging } from 'foo'; diff --git a/test/compare-esprima2/import-with-default.expected.min.js b/test/compare-esprima2/import-with-default.expected.min.js index 9541f438..6b6105f4 100644 --- a/test/compare-esprima2/import-with-default.expected.min.js +++ b/test/compare-esprima2/import-with-default.expected.min.js @@ -1 +1 @@ -import foo from'foo';import foo,*as foo from'foo';import*as foo from'foo';import ok,{foo,test,logging}from'foo' +import foo from'foo';import foo,*as foo from'foo';import*as foo from'foo';import ok,{foo as bar,test as testing,logging}from'foo' diff --git a/test/compare-esprima2/import-with-default.js b/test/compare-esprima2/import-with-default.js index 75d9a1fc..5e55c4ff 100644 --- a/test/compare-esprima2/import-with-default.js +++ b/test/compare-esprima2/import-with-default.js @@ -2,7 +2,7 @@ import foo from 'foo'; import foo, * as foo from 'foo'; import * as foo from 'foo'; import ok, { - foo, - test, + foo as bar, + test as testing, logging } from 'foo'; From da47c465c384bbb3745eb7f417a8c13614b4f3ff Mon Sep 17 00:00:00 2001 From: Ariya Hidayat Date: Sat, 21 Nov 2015 07:30:40 -0800 Subject: [PATCH 17/78] Don't test esprima-moz anymore. --- package.json | 1 - test/moz.js | 1276 -------------------------------------------------- 2 files changed, 1277 deletions(-) delete mode 100644 test/moz.js diff --git a/package.json b/package.json index 852608eb..ef4e37f1 100644 --- a/package.json +++ b/package.json @@ -45,7 +45,6 @@ "bower-registry-client": "^0.2.1", "chai": "^1.10.0", "commonjs-everywhere": "^0.9.7", - "esprima-moz": "1.0.0-dev-harmony-moz", "gulp": "^3.8.10", "gulp-eslint": "^0.2.0", "gulp-mocha": "^2.0.0", diff --git a/test/moz.js b/test/moz.js deleted file mode 100644 index 0b8aefff..00000000 --- a/test/moz.js +++ /dev/null @@ -1,1276 +0,0 @@ -/* - Copyright (C) 2011-2013 Yusuke Suzuki - Copyright (C) 2012 Ariya Hidayat - Copyright (C) 2012 Joost-Wim Boekesteijn - Copyright (C) 2012 Yusuke Suzuki - Copyright (C) 2012 Arpad Borsos - Copyright (C) 2011 Ariya Hidayat - Copyright (C) 2011 Arpad Borsos - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in the - documentation and/or other materials provided with the distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY - DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES - (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND - ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -*/ - -'use strict'; - -var esprima = require('esprima-moz'), - escodegen = require('./loader'), - chai = require('chai'), - expect = chai.expect, - data; - -data = { - 'Yield with starless generator': { - 'function a() { yield* test; }': { - type: 'Program', - body: [{ - type: 'FunctionDeclaration', - id: { - type: 'Identifier', - name: 'a', - range: [10, 11], - loc: { - start: { line: 1, column: 10 }, - end: { line: 1, column: 11 } - } - }, - params: [], - defaults: [], - body: { - type: 'BlockStatement', - body: [{ - type: 'ExpressionStatement', - expression: { - type: 'YieldExpression', - argument: { - type: 'Identifier', - name: 'test', - range: [23, 27], - loc: { - start: { line: 1, column: 23 }, - end: { line: 1, column: 27 } - } - }, - delegate: true, - range: [16, 27], - loc: { - start: { line: 1, column: 16 }, - end: { line: 1, column: 27 } - } - }, - range: [16, 28], - loc: { - start: { line: 1, column: 16 }, - end: { line: 1, column: 28 } - } - }], - range: [14, 30], - loc: { - start: { line: 1, column: 14 }, - end: { line: 1, column: 30 } - } - }, - rest: null, - generator: true, - expression: false, - range: [0, 30], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 30 } - } - }], - range: [0, 30], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 30 } - } - }, - - 'function a() { yield* (42,42); }': { - type: 'Program', - body: [{ - type: 'FunctionDeclaration', - id: { - type: 'Identifier', - name: 'a', - range: [10, 11], - loc: { - start: { line: 1, column: 10 }, - end: { line: 1, column: 11 } - } - }, - params: [], - defaults: [], - body: { - type: 'BlockStatement', - body: [{ - type: 'ExpressionStatement', - expression: { - type: 'YieldExpression', - argument: { - type: 'SequenceExpression', - expressions: [{ - type: 'Literal', - value: 42, - raw: '42', - range: [24, 26], - loc: { - start: { line: 1, column: 24 }, - end: { line: 1, column: 26 } - } - }, { - type: 'Literal', - value: 42, - raw: '42', - range: [27, 29], - loc: { - start: { line: 1, column: 27 }, - end: { line: 1, column: 29 } - } - }], - range: [24, 29], - loc: { - start: { line: 1, column: 24 }, - end: { line: 1, column: 29 } - } - }, - delegate: true, - range: [16, 30], - loc: { - start: { line: 1, column: 16 }, - end: { line: 1, column: 30 } - } - }, - range: [16, 31], - loc: { - start: { line: 1, column: 16 }, - end: { line: 1, column: 31 } - } - }], - range: [14, 33], - loc: { - start: { line: 1, column: 14 }, - end: { line: 1, column: 33 } - } - }, - rest: null, - generator: true, - expression: false, - range: [0, 33], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 33 } - } - }], - range: [0, 33], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 33 } - } - }, - - 'function a() {\n yield 1;\n}': { - generateFrom: { - type: 'Program', - body: [{ - type: 'FunctionDeclaration', - id: { - type: 'Identifier', - name: 'a', - range: [10, 11], - loc: { - start: { line: 1, column: 10 }, - end: { line: 1, column: 11 } - } - }, - params: [], - defaults: [], - body: { - type: 'BlockStatement', - body: [{ - type: 'ExpressionStatement', - expression: { - type: 'YieldExpression', - argument: { - type: 'Literal', - value: 1, - raw: '1', - range: [21, 22], - loc: { - start: { line: 1, column: 21 }, - end: { line: 1, column: 22 } - } - }, - delegate: false, - range: [15, 22], - loc: { - start: { line: 1, column: 15 }, - end: { line: 1, column: 22 } - } - }, - range: [15, 22], - loc: { - start: { line: 1, column: 15 }, - end: { line: 1, column: 22 } - } - }], - range: [14, 23], - loc: { - start: { line: 1, column: 14 }, - end: { line: 1, column: 23 } - } - }, - rest: null, - generator: true, - expression: false, - range: [0, 23], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 23 } - } - }], - range: [0, 23], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 23 } - } - } - } - }, - - 'Array Comprehension with parenthesized ComprehensionBlock': { - - '[x for (x in [])];':{ - generateFrom: { - type: 'Program', - body: [{ - type: 'ExpressionStatement', - expression: { - type: 'ComprehensionExpression', - filter: null, - blocks: [{ - type: 'ComprehensionBlock', - left: { - type: 'Identifier', - name: 'x', - range: [8, 9], - loc: { - start: { line: 1, column: 8 }, - end: { line: 1, column: 9 } - } - }, - right: { - type: 'ArrayExpression', - elements: [], - range: [13, 15], - loc: { - start: { line: 1, column: 13 }, - end: { line: 1, column: 15 } - } - }, - each: false, - of: false - }], - body: { - type: 'Identifier', - name: 'x', - range: [1, 2], - loc: { - start: { line: 1, column: 1 }, - end: { line: 1, column: 2 } - } - }, - range: [0, 17], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 17 } - } - }, - range: [0, 17], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 17 } - } - }], - range: [0, 17], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 17 } - } - } - }, - - '[x for (x of [])];': { - generateFrom: { - type: 'Program', - body: [{ - type: 'ExpressionStatement', - expression: { - type: 'ComprehensionExpression', - filter: null, - blocks: [{ - type: 'ComprehensionBlock', - left: { - type: 'Identifier', - name: 'x', - range: [8, 9], - loc: { - start: { line: 1, column: 8 }, - end: { line: 1, column: 9 } - } - }, - right: { - type: 'ArrayExpression', - elements: [], - range: [13, 15], - loc: { - start: { line: 1, column: 13 }, - end: { line: 1, column: 15 } - } - }, - each: false, - of: true - }], - body: { - type: 'Identifier', - name: 'x', - range: [1, 2], - loc: { - start: { line: 1, column: 1 }, - end: { line: 1, column: 2 } - } - }, - range: [0, 17], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 17 } - } - }, - range: [0, 17], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 17 } - } - }], - range: [0, 17], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 17 } - } - } - }, - - '[1 for (x in y) if (f(x))];': { - generateFrom: { - type: 'Program', - body: [{ - type: 'ExpressionStatement', - expression: { - type: 'ComprehensionExpression', - filter: { - type: 'CallExpression', - callee: { - type: 'Identifier', - name: 'f', - range: [20, 21], - loc: { - start: { line: 1, column: 20 }, - end: { line: 1, column: 21 } - } - }, - 'arguments': [{ - type: 'Identifier', - name: 'x', - range: [22, 23], - loc: { - start: { line: 1, column: 22 }, - end: { line: 1, column: 23 } - } - }], - range: [20, 24], - loc: { - start: { line: 1, column: 20 }, - end: { line: 1, column: 24 } - } - }, - blocks: [{ - type: 'ComprehensionBlock', - left: { - type: 'Identifier', - name: 'x', - range: [8, 9], - loc: { - start: { line: 1, column: 8 }, - end: { line: 1, column: 9 } - } - }, - right: { - type: 'Identifier', - name: 'y', - range: [13, 14], - loc: { - start: { line: 1, column: 13 }, - end: { line: 1, column: 14 } - } - }, - each: false, - of: false - }], - body: { - type: 'Literal', - value: 1, - raw: '1', - range: [1, 2], - loc: { - start: { line: 1, column: 1 }, - end: { line: 1, column: 2 } - } - }, - range: [0, 26], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 26 } - } - }, - range: [0, 26], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 26 } - } - }], - range: [0, 26], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 26 } - } - } - }, - - '[1 for (x of y) if (f(x))];': { - generateFrom: { - type: 'Program', - body: [{ - type: 'ExpressionStatement', - expression: { - type: 'ComprehensionExpression', - filter: { - type: 'CallExpression', - callee: { - type: 'Identifier', - name: 'f', - range: [20, 21], - loc: { - start: { line: 1, column: 20 }, - end: { line: 1, column: 21 } - } - }, - 'arguments': [{ - type: 'Identifier', - name: 'x', - range: [22, 23], - loc: { - start: { line: 1, column: 22 }, - end: { line: 1, column: 23 } - } - }], - range: [20, 24], - loc: { - start: { line: 1, column: 20 }, - end: { line: 1, column: 24 } - } - }, - blocks: [{ - type: 'ComprehensionBlock', - left: { - type: 'Identifier', - name: 'x', - range: [8, 9], - loc: { - start: { line: 1, column: 8 }, - end: { line: 1, column: 9 } - } - }, - right: { - type: 'Identifier', - name: 'y', - range: [13, 14], - loc: { - start: { line: 1, column: 13 }, - end: { line: 1, column: 14 } - } - }, - each: false, - of: true - }], - body: { - type: 'Literal', - value: 1, - raw: '1', - range: [1, 2], - loc: { - start: { line: 1, column: 1 }, - end: { line: 1, column: 2 } - } - }, - range: [0, 26], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 26 } - } - }, - range: [0, 26], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 26 } - } - }], - range: [0, 26], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 26 } - } - } - }, - - '[[\n x,\n b,\n c\n] for (x in []) for (b in []) if (b && c)];': { - generateFrom: { - type: 'Program', - body: [{ - type: 'ExpressionStatement', - expression: { - type: 'ComprehensionExpression', - filter: { - type: 'LogicalExpression', - operator: '&&', - left: { - type: 'Identifier', - name: 'b', - range: [41, 42], - loc: { - start: { line: 1, column: 41 }, - end: { line: 1, column: 42 } - } - }, - right: { - type: 'Identifier', - name: 'c', - range: [46, 47], - loc: { - start: { line: 1, column: 46 }, - end: { line: 1, column: 47 } - } - }, - range: [41, 47], - loc: { - start: { line: 1, column: 41 }, - end: { line: 1, column: 47 } - } - }, - blocks: [{ - type: 'ComprehensionBlock', - left: { - type: 'Identifier', - name: 'x', - range: [14, 15], - loc: { - start: { line: 1, column: 14 }, - end: { line: 1, column: 15 } - } - }, - right: { - type: 'ArrayExpression', - elements: [], - range: [19, 21], - loc: { - start: { line: 1, column: 19 }, - end: { line: 1, column: 21 } - } - }, - each: false, - of: false - }, { - type: 'ComprehensionBlock', - left: { - type: 'Identifier', - name: 'b', - range: [28, 29], - loc: { - start: { line: 1, column: 28 }, - end: { line: 1, column: 29 } - } - }, - right: { - type: 'ArrayExpression', - elements: [], - range: [33, 35], - loc: { - start: { line: 1, column: 33 }, - end: { line: 1, column: 35 } - } - }, - each: false, - of: false - }], - body: { - type: 'ArrayExpression', - elements: [{ - type: 'Identifier', - name: 'x', - range: [2, 3], - loc: { - start: { line: 1, column: 2 }, - end: { line: 1, column: 3 } - } - }, { - type: 'Identifier', - name: 'b', - range: [4, 5], - loc: { - start: { line: 1, column: 4 }, - end: { line: 1, column: 5 } - } - }, { - type: 'Identifier', - name: 'c', - range: [6, 7], - loc: { - start: { line: 1, column: 6 }, - end: { line: 1, column: 7 } - } - }], - range: [1, 8], - loc: { - start: { line: 1, column: 1 }, - end: { line: 1, column: 8 } - } - }, - range: [0, 49], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 49 } - } - }, - range: [0, 49], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 49 } - } - }], - range: [0, 49], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 49 } - } - } - }, - - '[[\n x,\n b,\n c\n] for (x of []) for (b of []) if (b && c)];': { - generateFrom: { - type: 'Program', - body: [{ - type: 'ExpressionStatement', - expression: { - type: 'ComprehensionExpression', - filter: { - type: 'LogicalExpression', - operator: '&&', - left: { - type: 'Identifier', - name: 'b', - range: [41, 42], - loc: { - start: { line: 1, column: 41 }, - end: { line: 1, column: 42 } - } - }, - right: { - type: 'Identifier', - name: 'c', - range: [46, 47], - loc: { - start: { line: 1, column: 46 }, - end: { line: 1, column: 47 } - } - }, - range: [41, 47], - loc: { - start: { line: 1, column: 41 }, - end: { line: 1, column: 47 } - } - }, - blocks: [{ - type: 'ComprehensionBlock', - left: { - type: 'Identifier', - name: 'x', - range: [14, 15], - loc: { - start: { line: 1, column: 14 }, - end: { line: 1, column: 15 } - } - }, - right: { - type: 'ArrayExpression', - elements: [], - range: [19, 21], - loc: { - start: { line: 1, column: 19 }, - end: { line: 1, column: 21 } - } - }, - each: false, - of: true - }, { - type: 'ComprehensionBlock', - left: { - type: 'Identifier', - name: 'b', - range: [28, 29], - loc: { - start: { line: 1, column: 28 }, - end: { line: 1, column: 29 } - } - }, - right: { - type: 'ArrayExpression', - elements: [], - range: [33, 35], - loc: { - start: { line: 1, column: 33 }, - end: { line: 1, column: 35 } - } - }, - each: false, - of: true - }], - body: { - type: 'ArrayExpression', - elements: [{ - type: 'Identifier', - name: 'x', - range: [2, 3], - loc: { - start: { line: 1, column: 2 }, - end: { line: 1, column: 3 } - } - }, { - type: 'Identifier', - name: 'b', - range: [4, 5], - loc: { - start: { line: 1, column: 4 }, - end: { line: 1, column: 5 } - } - }, { - type: 'Identifier', - name: 'c', - range: [6, 7], - loc: { - start: { line: 1, column: 6 }, - end: { line: 1, column: 7 } - } - }], - range: [1, 8], - loc: { - start: { line: 1, column: 1 }, - end: { line: 1, column: 8 } - } - }, - range: [0, 49], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 49 } - } - }, - range: [0, 49], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 49 } - } - }], - range: [0, 49], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 49 } - } - } - } - }, - - 'Expression Closures': { - 'function milky() ({})': { - type: 'Program', - body: [{ - type: 'FunctionDeclaration', - id: { - type: 'Identifier', - name: 'milky', - range: [9, 14], - loc: { - start: { line: 1, column: 9 }, - end: { line: 1, column: 14 } - } - }, - params: [], - defaults: [], - body: { - type: 'ObjectExpression', - properties: [], - range: [18, 20], - loc: { - start: { line: 1, column: 18 }, - end: { line: 1, column: 20 } - } - }, - rest: null, - generator: false, - expression: true, - range: [0, 21], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 21 } - } - }], - range: [0, 21], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 21 } - } - }, - - '({ test: function () 42 })': { - type: 'Program', - body: [{ - type: 'ExpressionStatement', - expression: { - type: 'ObjectExpression', - properties: [{ - type: 'Property', - key: { - type: 'Identifier', - name: 'test', - range: [3, 7], - loc: { - start: { line: 1, column: 3 }, - end: { line: 1, column: 7 } - } - }, - value: { - type: 'FunctionExpression', - id: null, - params: [], - defaults: [], - body: { - type: 'Literal', - value: 42, - raw: '42', - range: [21, 23], - loc: { - start: { line: 1, column: 21 }, - end: { line: 1, column: 23 } - } - }, - rest: null, - generator: false, - expression: true, - range: [9, 23], - loc: { - start: { line: 1, column: 9 }, - end: { line: 1, column: 23 } - } - }, - kind: 'init', - range: [3, 23], - loc: { - start: { line: 1, column: 3 }, - end: { line: 1, column: 23 } - } - }], - range: [1, 25], - loc: { - start: { line: 1, column: 1 }, - end: { line: 1, column: 25 } - } - }, - range: [0, 26], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 26 } - } - }], - range: [0, 26], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 26 } - } - }, - - 'function a() 1': { - generateFrom: { - type: 'Program', - body: [{ - type: 'FunctionDeclaration', - id: { - type: 'Identifier', - name: 'a', - range: [9, 10], - loc: { - start: { line: 1, column: 9 }, - end: { line: 1, column: 10 } - } - }, - params: [], - defaults: [], - body: { - type: 'Literal', - value: 1, - raw: '1', - range: [13, 14], - loc: { - start: { line: 1, column: 13 }, - end: { line: 1, column: 14 } - } - }, - rest: null, - generator: false, - expression: true, - range: [0, 14], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 14 } - } - }], - range: [0, 14], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 14 } - } - } - }, - - 'function a() {\n}': { - generateFrom: { - type: 'Program', - body: [{ - type: 'FunctionDeclaration', - id: { - type: 'Identifier', - name: 'a', - range: [9, 10], - loc: { - start: { line: 1, column: 9 }, - end: { line: 1, column: 10 } - } - }, - params: [], - defaults: [], - body: { - type: 'BlockStatement', - body: [], - range: [13, 15], - loc: { - start: { line: 1, column: 13 }, - end: { line: 1, column: 15 } - } - }, - rest: null, - generator: false, - expression: false, - range: [0, 15], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 15 } - } - }], - range: [0, 15], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 15 } - } - } - }, - - 'function a() my()': { - generateFrom: { - type: 'Program', - body: [{ - type: 'FunctionDeclaration', - id: { - type: 'Identifier', - name: 'a', - range: [9, 10], - loc: { - start: { line: 1, column: 9 }, - end: { line: 1, column: 10 } - } - }, - params: [], - defaults: [], - body: { - type: 'CallExpression', - callee: { - type: 'Identifier', - name: 'my', - range: [13, 15], - loc: { - start: { line: 1, column: 13 }, - end: { line: 1, column: 15 } - } - }, - 'arguments': [], - range: [13, 17], - loc: { - start: { line: 1, column: 13 }, - end: { line: 1, column: 17 } - } - }, - rest: null, - generator: false, - expression: true, - range: [0, 17], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 17 } - } - }], - range: [0, 17], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 17 } - } - } - }, - - '[function () 1];': { - generateFrom: { - type: 'Program', - body: [{ - type: 'ExpressionStatement', - expression: { - type: 'ArrayExpression', - elements: [{ - type: 'FunctionExpression', - id: null, - params: [], - defaults: [], - body: { - type: 'Literal', - value: 1, - raw: '1', - range: [13, 14], - loc: { - start: { line: 1, column: 13 }, - end: { line: 1, column: 14 } - } - }, - rest: null, - generator: false, - expression: true, - range: [1, 14], - loc: { - start: { line: 1, column: 1 }, - end: { line: 1, column: 14 } - } - }], - range: [0, 15], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 15 } - } - }, - range: [0, 15], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 15 } - } - }], - range: [0, 15], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 15 } - } - } - }, - - '({test: function () (42,42)})': { - type: 'Program', - body: [{ - type: 'ExpressionStatement', - expression: { - type: 'ObjectExpression', - properties: [{ - type: 'Property', - key: { - type: 'Identifier', - name: 'test', - range: [3, 7], - loc: { - start: { line: 1, column: 3 }, - end: { line: 1, column: 7 } - } - }, - value: { - type: 'FunctionExpression', - id: null, - params: [], - defaults: [], - body: { - type: 'SequenceExpression', - expressions: [{ - type: 'Literal', - value: 42, - raw: '42', - range: [22, 24], - loc: { - start: { line: 1, column: 22 }, - end: { line: 1, column: 24 } - } - }, { - type: 'Literal', - value: 42, - raw: '42', - range: [25, 27], - loc: { - start: { line: 1, column: 25 }, - end: { line: 1, column: 27 } - } - }], - range: [22, 27], - loc: { - start: { line: 1, column: 22 }, - end: { line: 1, column: 27 } - } - }, - rest: null, - generator: false, - expression: true, - range: [9, 28], - loc: { - start: { line: 1, column: 9 }, - end: { line: 1, column: 28 } - } - }, - kind: 'init', - range: [3, 28], - loc: { - start: { line: 1, column: 3 }, - end: { line: 1, column: 28 } - } - }], - range: [1, 30], - loc: { - start: { line: 1, column: 1 }, - end: { line: 1, column: 30 } - } - }, - range: [0, 31], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 31 } - } - }], - range: [0, 31], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 31 } - } - } - } -}; - -// Special handling for regular expression literal since we need to -// convert it to a string literal, otherwise it will be decoded -// as object "{}" and the regular expression would be lost. -function adjustRegexLiteral(key, value) { - 'use strict'; - if (key === 'value' && value instanceof RegExp) { - value = value.toString(); - } - return value; -} - -function testIdentity(code, syntax) { - 'use strict'; - var expected, tree, actual, actual2, options, StringObject; - - // alias, so that JSLint does not complain. - StringObject = String; - - options = { - comment: false, - range: false, - loc: false, - tokens: false, - raw: false - }; - - tree = esprima.parse(code, options); - expected = JSON.stringify(tree, adjustRegexLiteral, 4); - tree = esprima.parse(escodegen.generate(tree), options); - actual = JSON.stringify(tree, adjustRegexLiteral, 4); - tree = esprima.parse(escodegen.generate(syntax), options); - actual2 = JSON.stringify(tree, adjustRegexLiteral, 4); - expect(actual).to.be.equal(expected); - expect(actual2).to.be.equal(expected); -} - -function testGenerate(expected, result) { - 'use strict'; - var actual, options; - - options = { - indent: ' ', - parse: esprima.parse, - moz: { - starlessGenerator: true, - comprehensionExpressionStartsWithAssignment: true - } - }; - - actual = escodegen.generate(result.generateFrom, options); - expect(actual).to.be.equal(expected); -} - -function isGeneratorIdentityFixture(result) { - 'use strict'; - return !result.hasOwnProperty('generateFrom') && - !result.hasOwnProperty('result'); -} - -function runTest(code, result) { - 'use strict'; - if (result.hasOwnProperty('generateFrom')) { - testGenerate(code, result); - } else { - testIdentity(code, result); - } -} - -describe('moz test', function () { - Object.keys(data).forEach(function (category) { - Object.keys(data[category]).forEach(function (source) { - it(category, function () { - var expected = data[category][source]; - runTest(source, expected); - }); - }); - }); -}); -/* vim: set sw=4 ts=4 et tw=80 : */ From ceaa2d65d3026ae5783c8066015ac6cf18e81db6 Mon Sep 17 00:00:00 2001 From: Ariya Hidayat Date: Sat, 21 Nov 2015 08:15:48 -0800 Subject: [PATCH 18/78] Update semver to the latest version 5.1. --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index ef4e37f1..af87897f 100644 --- a/package.json +++ b/package.json @@ -48,7 +48,7 @@ "gulp": "^3.8.10", "gulp-eslint": "^0.2.0", "gulp-mocha": "^2.0.0", - "semver": "^4.1.0" + "semver": "^5.1.0" }, "license": "BSD-2-Clause", "scripts": { From 5b152cf4353cc8b4752aabe6e39d5d98bcd65f71 Mon Sep 17 00:00:00 2001 From: Ariya Hidayat Date: Sun, 22 Nov 2015 10:06:10 -0800 Subject: [PATCH 19/78] Travis CI's Node.js versions: exclude 0.11, add iojs and latest stable 4. 0.11 was considered unstable and superceded already by 0.12. Since >= 0.12 is what is tested, that is the one which should go in the package manifest. --- .travis.yml | 9 ++++----- package.json | 2 +- 2 files changed, 5 insertions(+), 6 deletions(-) diff --git a/.travis.yml b/.travis.yml index b5aa9f8c..9c8593d2 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,8 +1,7 @@ sudo: false language: node_js node_js: - - "0.11" - - "0.12" -matrix: - allow_failures: - - node_js: "0.11" + - "0.10" + - "0.12" + - iojs + - "4" diff --git a/package.json b/package.json index af87897f..7ee6a66b 100644 --- a/package.json +++ b/package.json @@ -17,7 +17,7 @@ ], "version": "1.7.0", "engines": { - "node": ">=0.10.0" + "node": ">=0.12.0" }, "maintainers": [ { From f48fa71ce638ec32943c42c2377a08cefe9d8576 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Tue, 24 Nov 2015 14:08:22 -0800 Subject: [PATCH 20/78] version 1.7.1 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 7ee6a66b..26c603e3 100644 --- a/package.json +++ b/package.json @@ -15,7 +15,7 @@ "escodegen.js", "package.json" ], - "version": "1.7.0", + "version": "1.7.1", "engines": { "node": ">=0.12.0" }, From 9e5f89d2425dc8d04ce8d5b1497f7a1bb53055fd Mon Sep 17 00:00:00 2001 From: Adam Mcgrath Date: Wed, 25 Nov 2015 21:32:17 +0000 Subject: [PATCH 21/78] Add exported identifier to ExportSpecifier for esprima See #271 --- escodegen.js | 6 +++--- .../compare-esprima2/export-default-declaration.expected.js | 3 +++ .../export-default-declaration.expected.min.js | 2 +- test/compare-esprima2/export-default-declaration.js | 1 + 4 files changed, 8 insertions(+), 4 deletions(-) diff --git a/escodegen.js b/escodegen.js index 8f98fbc6..20c5237d 100644 --- a/escodegen.js +++ b/escodegen.js @@ -2262,10 +2262,10 @@ }, ExportSpecifier: function (expr, precedence, flags) { - var exported = (expr.id || expr.imported).name; - var result = [ exported ]; + var name = (expr.id || expr.imported || expr.exported).name; + var result = [ name ]; var id = expr.name || expr.local; - if (id && id.name !== exported) { + if (id && id.name !== name) { result.push(noEmptySpace() + 'as' + noEmptySpace() + generateIdentifier(id)); } return result; diff --git a/test/compare-esprima2/export-default-declaration.expected.js b/test/compare-esprima2/export-default-declaration.expected.js index 20102028..73bd3365 100644 --- a/test/compare-esprima2/export-default-declaration.expected.js +++ b/test/compare-esprima2/export-default-declaration.expected.js @@ -1,2 +1,5 @@ export default function a() { } +export { + foo +}; diff --git a/test/compare-esprima2/export-default-declaration.expected.min.js b/test/compare-esprima2/export-default-declaration.expected.min.js index 4c00c1fc..7d11b956 100644 --- a/test/compare-esprima2/export-default-declaration.expected.min.js +++ b/test/compare-esprima2/export-default-declaration.expected.min.js @@ -1 +1 @@ -export default function a(){} +export default function a(){}export{foo} diff --git a/test/compare-esprima2/export-default-declaration.js b/test/compare-esprima2/export-default-declaration.js index 5ef9d4be..4e8ae6f8 100644 --- a/test/compare-esprima2/export-default-declaration.js +++ b/test/compare-esprima2/export-default-declaration.js @@ -1,3 +1,4 @@ export default function a () { } +export { foo }; // export default var i = 20; // export default const K = 20; From 9ab203a06446fd9f405699297b3015915e0d8779 Mon Sep 17 00:00:00 2001 From: Adam Mcgrath Date: Thu, 26 Nov 2015 20:00:21 +0000 Subject: [PATCH 22/78] Create export-declaration test cases --- test/compare-esprima2/export-declaration.expected.js | 3 +++ test/compare-esprima2/export-declaration.expected.min.js | 1 + test/compare-esprima2/export-declaration.js | 1 + test/compare-esprima2/export-default-declaration.expected.js | 3 --- .../export-default-declaration.expected.min.js | 2 +- test/compare-esprima2/export-default-declaration.js | 1 - 6 files changed, 6 insertions(+), 5 deletions(-) create mode 100644 test/compare-esprima2/export-declaration.expected.js create mode 100644 test/compare-esprima2/export-declaration.expected.min.js create mode 100644 test/compare-esprima2/export-declaration.js diff --git a/test/compare-esprima2/export-declaration.expected.js b/test/compare-esprima2/export-declaration.expected.js new file mode 100644 index 00000000..2bb4bf23 --- /dev/null +++ b/test/compare-esprima2/export-declaration.expected.js @@ -0,0 +1,3 @@ +export { + foo +}; diff --git a/test/compare-esprima2/export-declaration.expected.min.js b/test/compare-esprima2/export-declaration.expected.min.js new file mode 100644 index 00000000..cfbda7c1 --- /dev/null +++ b/test/compare-esprima2/export-declaration.expected.min.js @@ -0,0 +1 @@ +export{foo} diff --git a/test/compare-esprima2/export-declaration.js b/test/compare-esprima2/export-declaration.js new file mode 100644 index 00000000..f40ac5c3 --- /dev/null +++ b/test/compare-esprima2/export-declaration.js @@ -0,0 +1 @@ +export { foo }; diff --git a/test/compare-esprima2/export-default-declaration.expected.js b/test/compare-esprima2/export-default-declaration.expected.js index 73bd3365..20102028 100644 --- a/test/compare-esprima2/export-default-declaration.expected.js +++ b/test/compare-esprima2/export-default-declaration.expected.js @@ -1,5 +1,2 @@ export default function a() { } -export { - foo -}; diff --git a/test/compare-esprima2/export-default-declaration.expected.min.js b/test/compare-esprima2/export-default-declaration.expected.min.js index 7d11b956..4c00c1fc 100644 --- a/test/compare-esprima2/export-default-declaration.expected.min.js +++ b/test/compare-esprima2/export-default-declaration.expected.min.js @@ -1 +1 @@ -export default function a(){}export{foo} +export default function a(){} diff --git a/test/compare-esprima2/export-default-declaration.js b/test/compare-esprima2/export-default-declaration.js index 4e8ae6f8..5ef9d4be 100644 --- a/test/compare-esprima2/export-default-declaration.js +++ b/test/compare-esprima2/export-default-declaration.js @@ -1,4 +1,3 @@ export default function a () { } -export { foo }; // export default var i = 20; // export default const K = 20; From 6420bdaa57a324c07399316e1676f7d9a1866e3a Mon Sep 17 00:00:00 2001 From: steveg Date: Tue, 15 Dec 2015 13:40:10 +1000 Subject: [PATCH 23/78] Added simple support for MetaProperty --- escodegen.js | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/escodegen.js b/escodegen.js index 20c5237d..a44a5e17 100644 --- a/escodegen.js +++ b/escodegen.js @@ -1938,6 +1938,15 @@ return parenthesize(result, Precedence.Member, precedence); }, + MetaProperty: function (expr, precedence, flags) { + var result; + result = []; + result.push(generateIdentifier(expr.meta)); + result.push('.'); + result.push(generateIdentifier(expr.property)); + return parenthesize(result, Precedence.Member, precedence); + }, + UnaryExpression: function (expr, precedence, flags) { var result, fragment, rightCharCode, leftSource, leftCharCode; fragment = this.generateExpression(expr.argument, Precedence.Unary, E_TTT); From 8739f75aec0ecd939ac0d96feb2c08629320df7b Mon Sep 17 00:00:00 2001 From: steveg Date: Tue, 15 Dec 2015 14:44:28 +1000 Subject: [PATCH 24/78] Cleaned up code, added test case for esprima 2.5 enhancement to parse new.target meta-property. --- escodegen.js | 4 +- test/harmony-esprima-2.5.js | 225 ++++++++++++++++++++++++++++++++++++ 2 files changed, 227 insertions(+), 2 deletions(-) create mode 100644 test/harmony-esprima-2.5.js diff --git a/escodegen.js b/escodegen.js index a44a5e17..a33fb86b 100644 --- a/escodegen.js +++ b/escodegen.js @@ -1941,9 +1941,9 @@ MetaProperty: function (expr, precedence, flags) { var result; result = []; - result.push(generateIdentifier(expr.meta)); + result.push(expr.meta); result.push('.'); - result.push(generateIdentifier(expr.property)); + result.push(expr.property); return parenthesize(result, Precedence.Member, precedence); }, diff --git a/test/harmony-esprima-2.5.js b/test/harmony-esprima-2.5.js new file mode 100644 index 00000000..8f8959d2 --- /dev/null +++ b/test/harmony-esprima-2.5.js @@ -0,0 +1,225 @@ +/* + Copyright (C) 2011-2013 Yusuke Suzuki + Copyright (C) 2015 Ingvar Stepanyan + Copyright (C) 2012 Ariya Hidayat + Copyright (C) 2012 Joost-Wim Boekesteijn + Copyright (C) 2012 Yusuke Suzuki + Copyright (C) 2012 Arpad Borsos + Copyright (C) 2011 Ariya Hidayat + Copyright (C) 2011 Arpad Borsos + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY + DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +'use strict'; + +var esprima = require('./3rdparty/esprima-2.5.0'), + escodegen = require('./loader'), + chai = require('chai'), + expect = chai.expect, + data; + +data = { + 'Harmony MetaProperty': { + 'class SomeClass { constructor() { if (new.target === SomeClass) { throw new Error(\'Boom\'); }}}': { + type: 'Program', + body: [ { + type: "ClassDeclaration", + id: { + type: "Identifier", + name: "SomeClass" + }, + superClass: null, + body: { + type: "ClassBody", + body: [ + { + type: "MethodDefinition", + key: { + type: "Identifier", + name: "constructor" + }, + computed: false, + value: { + type: "FunctionExpression", + id: null, + params: [], + defaults: [], + body: { + type: "BlockStatement", + body: [ + { + type: "IfStatement", + test: { + type: "BinaryExpression", + operator: "===", + left: { + type: "MetaProperty", + meta: "new", + property: "target" + }, + right: { + type: "Identifier", + name: "SomeClass" + } + }, + consequent: { + type: "BlockStatement", + body: [ + { + type: "ThrowStatement", + argument: { + type: "NewExpression", + callee: { + type: "Identifier", + name: "Error" + }, + arguments: [ + { + type: "Literal", + value: "Boom", + raw: "'Boom'" + } + ] + } + } + ] + }, + alternate: null + } + ] + }, + generator: false, + expression: false + }, + kind: "constructor", + static: false + } + ], + } + }], + } + }, +}; + +function updateDeeply(target, override) { + var key, val; + + function isHashObject(target) { + return typeof target === 'object' && target instanceof Object && !(target instanceof RegExp); + } + + for (key in override) { + if (override.hasOwnProperty(key)) { + val = override[key]; + if (isHashObject(val)) { + if (isHashObject(target[key])) { + updateDeeply(target[key], val); + } else { + target[key] = updateDeeply({}, val); + } + } else { + target[key] = val; + } + } + } + return target; +} + +// Special handling for regular expression literal since we need to +// convert it to a string literal, otherwise it will be decoded +// as object "{}" and the regular expression would be lost. +function adjustRegexLiteral(key, value) { + 'use strict'; + if (key === 'value' && value instanceof RegExp) { + value = value.toString(); + } + return value; +} + +function testIdentity(code, syntax) { + 'use strict'; + var expected, tree, actual, actual2, options, StringObject; + + // alias, so that JSLint does not complain. + StringObject = String; + + options = { + comment: false, + range: false, + loc: false, + tokens: false, + raw: false + }; + + tree = esprima.parse(code, options); + expected = JSON.stringify(tree, adjustRegexLiteral, 4); + tree = esprima.parse(escodegen.generate(tree), options); + actual = JSON.stringify(tree, adjustRegexLiteral, 4); + tree = esprima.parse(escodegen.generate(syntax), options); + actual2 = JSON.stringify(tree, adjustRegexLiteral, 4); + expect(actual).to.be.equal(expected); + expect(actual2).to.be.equal(expected); +} + +function testGenerate(expected, result) { + 'use strict'; + var actual, options; + + options = { + indent: ' ', + parse: esprima.parse + }; + + if (result.options) { + options = updateDeeply(options, result.options); + } + + actual = escodegen.generate(result.generateFrom, options); + expect(actual).to.be.equal(expected); +} + +function isGeneratorIdentityFixture(result) { + 'use strict'; + return !result.hasOwnProperty('generateFrom') && + !result.hasOwnProperty('result'); +} + +function runTest(code, result) { + 'use strict'; + if (result.hasOwnProperty('generateFrom')) { + testGenerate(code, result); + } else { + testIdentity(code, result); + } +} + +describe('harmony 2.x test', function () { + Object.keys(data).forEach(function (category) { + Object.keys(data[category]).forEach(function (source) { + it(category, function () { + var expected = data[category][source]; + runTest(source, expected); + }); + }); + }); +}); +/* vim: set sw=4 ts=4 et tw=80 : */ From 3abb2716ea1e9d032fca799e43225986f57c5f22 Mon Sep 17 00:00:00 2001 From: Yusuke Suzuki Date: Sun, 3 Jan 2016 08:35:30 +0900 Subject: [PATCH 25/78] Update export declarations to meet the latest estree spec harmony.js's dropped tests are already covered by the compare-esprima2 tests. Close #278 --- escodegen.js | 66 +- test/3rdparty/esprima-2.5.0.js | 5658 ---------------- test/3rdparty/esprima-2.7.1.js | 5741 +++++++++++++++++ .../compare-acorn-es6/exports.expected.min.js | 1 - test/compare-esprima2.js | 2 +- .../exports.expected.js | 1 - test/compare-esprima2/exports.expected.min.js | 1 + .../exports.js | 1 - .../imports.expected.js | 0 .../imports.expected.min.js | 0 .../imports.js | 0 .../export-default-declaration.expected.js | 2 - ...export-default-declaration.expected.min.js | 1 - .../export-default-declaration.js | 3 - .../import-with-default.expected.js | 8 - .../import-with-default.expected.min.js | 1 - test/compare-harmony/import-with-default.js | 8 - ...ony-esprima-2.5.js => harmony-esprima2.js} | 2 +- test/harmony.js | 217 - 19 files changed, 5781 insertions(+), 5932 deletions(-) delete mode 100644 test/3rdparty/esprima-2.5.0.js create mode 100644 test/3rdparty/esprima-2.7.1.js delete mode 100644 test/compare-acorn-es6/exports.expected.min.js rename test/{compare-acorn-es6 => compare-esprima2}/exports.expected.js (90%) create mode 100644 test/compare-esprima2/exports.expected.min.js rename test/{compare-acorn-es6 => compare-esprima2}/exports.js (89%) rename test/{compare-harmony => compare-esprima2}/imports.expected.js (100%) rename test/{compare-harmony => compare-esprima2}/imports.expected.min.js (100%) rename test/{compare-harmony => compare-esprima2}/imports.js (100%) delete mode 100644 test/compare-harmony/export-default-declaration.expected.js delete mode 100644 test/compare-harmony/export-default-declaration.expected.min.js delete mode 100644 test/compare-harmony/export-default-declaration.js delete mode 100644 test/compare-harmony/import-with-default.expected.js delete mode 100644 test/compare-harmony/import-with-default.expected.min.js delete mode 100644 test/compare-harmony/import-with-default.js rename test/{harmony-esprima-2.5.js => harmony-esprima2.js} (99%) diff --git a/escodegen.js b/escodegen.js index a33fb86b..fa899888 100644 --- a/escodegen.js +++ b/escodegen.js @@ -1201,22 +1201,26 @@ return ';'; }, - ExportDeclaration: function (stmt, flags) { - var result = [ 'export' ], bodyFlags, that = this; + ExportDefaultDeclaration: function (stmt, flags) { + var result = [ 'export' ], bodyFlags; bodyFlags = (flags & F_SEMICOLON_OPT) ? S_TFFT : S_TFFF; // export default HoistableDeclaration[Default] // export default AssignmentExpression[In] ; - if (stmt['default']) { - result = join(result, 'default'); - if (isStatement(stmt.declaration)) { - result = join(result, this.generateStatement(stmt.declaration, bodyFlags)); - } else { - result = join(result, this.generateExpression(stmt.declaration, Precedence.Assignment, E_TTT) + this.semicolon(flags)); - } - return result; + result = join(result, 'default'); + if (isStatement(stmt.declaration)) { + result = join(result, this.generateStatement(stmt.declaration, bodyFlags)); + } else { + result = join(result, this.generateExpression(stmt.declaration, Precedence.Assignment, E_TTT) + this.semicolon(flags)); } + return result; + }, + + ExportNamedDeclaration: function (stmt, flags) { + var result = [ 'export' ], bodyFlags, that = this; + + bodyFlags = (flags & F_SEMICOLON_OPT) ? S_TFFT : S_TFFF; // export VariableStatement // export Declaration[Default] @@ -1224,7 +1228,6 @@ return join(result, this.generateStatement(stmt.declaration, bodyFlags)); } - // export * FromClause ; // export ExportClause[NoReference] FromClause ; // export ExportClause ; if (stmt.specifiers) { @@ -1265,13 +1268,16 @@ return result; }, - ExportDefaultDeclaration: function (stmt, flags) { - stmt.default = true; - return this.ExportDeclaration(stmt, flags); - }, - - ExportNamedDeclaration: function (stmt, flags) { - return this.ExportDeclaration(stmt, flags); + ExportAllDeclaration: function (stmt, flags) { + // export * FromClause ; + return [ + 'export' + space, + '*' + space, + 'from' + space, + // ModuleSpecifier + this.generateExpression(stmt.source, Precedence.Sequence, E_TTT), + this.semicolon(flags) + ]; }, ExpressionStatement: function (stmt, flags) { @@ -1729,7 +1735,7 @@ generateAsyncPrefix(stmt, true), 'function', generateStarSuffix(stmt) || noEmptySpace(), - generateIdentifier(stmt.id), + stmt.id ? generateIdentifier(stmt.id) : '', this.generateFunctionBody(stmt) ]; }, @@ -2038,10 +2044,6 @@ return result; }, - ExportBatchSpecifier: function (expr, precedence, flags) { - return '*'; - }, - ArrayPattern: function (expr, precedence, flags) { return this.ArrayExpression(expr, precedence, flags, true); }, @@ -2267,15 +2269,21 @@ }, ImportSpecifier: function (expr, precedence, flags) { - return this.ExportSpecifier(expr, precedence, flags); + var imported = expr.imported; + var result = [ imported.name ]; + var local = expr.local; + if (local && local.name !== imported.name) { + result.push(noEmptySpace() + 'as' + noEmptySpace() + generateIdentifier(local)); + } + return result; }, ExportSpecifier: function (expr, precedence, flags) { - var name = (expr.id || expr.imported || expr.exported).name; - var result = [ name ]; - var id = expr.name || expr.local; - if (id && id.name !== name) { - result.push(noEmptySpace() + 'as' + noEmptySpace() + generateIdentifier(id)); + var local = expr.local; + var result = [ local.name ]; + var exported = expr.exported; + if (exported && exported.name !== local.name) { + result.push(noEmptySpace() + 'as' + noEmptySpace() + generateIdentifier(exported)); } return result; }, diff --git a/test/3rdparty/esprima-2.5.0.js b/test/3rdparty/esprima-2.5.0.js deleted file mode 100644 index ba07b067..00000000 --- a/test/3rdparty/esprima-2.5.0.js +++ /dev/null @@ -1,5658 +0,0 @@ -/* - Copyright (c) jQuery Foundation, Inc. and Contributors, All Rights Reserved. - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in the - documentation and/or other materials provided with the distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY - DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES - (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND - ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -(function (root, factory) { - 'use strict'; - - // Universal Module Definition (UMD) to support AMD, CommonJS/Node.js, - // Rhino, and plain browser loading. - - /* istanbul ignore next */ - if (typeof define === 'function' && define.amd) { - define(['exports'], factory); - } else if (typeof exports !== 'undefined') { - factory(exports); - } else { - factory((root.esprima = {})); - } -}(this, function (exports) { - 'use strict'; - - var Token, - TokenName, - FnExprTokens, - Syntax, - PlaceHolders, - Messages, - Regex, - source, - strict, - index, - lineNumber, - lineStart, - hasLineTerminator, - lastIndex, - lastLineNumber, - lastLineStart, - startIndex, - startLineNumber, - startLineStart, - scanning, - length, - lookahead, - state, - extra, - isBindingElement, - isAssignmentTarget, - firstCoverInitializedNameError; - - Token = { - BooleanLiteral: 1, - EOF: 2, - Identifier: 3, - Keyword: 4, - NullLiteral: 5, - NumericLiteral: 6, - Punctuator: 7, - StringLiteral: 8, - RegularExpression: 9, - Template: 10 - }; - - TokenName = {}; - TokenName[Token.BooleanLiteral] = 'Boolean'; - TokenName[Token.EOF] = ''; - TokenName[Token.Identifier] = 'Identifier'; - TokenName[Token.Keyword] = 'Keyword'; - TokenName[Token.NullLiteral] = 'Null'; - TokenName[Token.NumericLiteral] = 'Numeric'; - TokenName[Token.Punctuator] = 'Punctuator'; - TokenName[Token.StringLiteral] = 'String'; - TokenName[Token.RegularExpression] = 'RegularExpression'; - TokenName[Token.Template] = 'Template'; - - // A function following one of those tokens is an expression. - FnExprTokens = ['(', '{', '[', 'in', 'typeof', 'instanceof', 'new', - 'return', 'case', 'delete', 'throw', 'void', - // assignment operators - '=', '+=', '-=', '*=', '/=', '%=', '<<=', '>>=', '>>>=', - '&=', '|=', '^=', ',', - // binary/unary operators - '+', '-', '*', '/', '%', '++', '--', '<<', '>>', '>>>', '&', - '|', '^', '!', '~', '&&', '||', '?', ':', '===', '==', '>=', - '<=', '<', '>', '!=', '!==']; - - Syntax = { - AssignmentExpression: 'AssignmentExpression', - AssignmentPattern: 'AssignmentPattern', - ArrayExpression: 'ArrayExpression', - ArrayPattern: 'ArrayPattern', - ArrowFunctionExpression: 'ArrowFunctionExpression', - BlockStatement: 'BlockStatement', - BinaryExpression: 'BinaryExpression', - BreakStatement: 'BreakStatement', - CallExpression: 'CallExpression', - CatchClause: 'CatchClause', - ClassBody: 'ClassBody', - ClassDeclaration: 'ClassDeclaration', - ClassExpression: 'ClassExpression', - ConditionalExpression: 'ConditionalExpression', - ContinueStatement: 'ContinueStatement', - DoWhileStatement: 'DoWhileStatement', - DebuggerStatement: 'DebuggerStatement', - EmptyStatement: 'EmptyStatement', - ExportAllDeclaration: 'ExportAllDeclaration', - ExportDefaultDeclaration: 'ExportDefaultDeclaration', - ExportNamedDeclaration: 'ExportNamedDeclaration', - ExportSpecifier: 'ExportSpecifier', - ExpressionStatement: 'ExpressionStatement', - ForStatement: 'ForStatement', - ForOfStatement: 'ForOfStatement', - ForInStatement: 'ForInStatement', - FunctionDeclaration: 'FunctionDeclaration', - FunctionExpression: 'FunctionExpression', - Identifier: 'Identifier', - IfStatement: 'IfStatement', - ImportDeclaration: 'ImportDeclaration', - ImportDefaultSpecifier: 'ImportDefaultSpecifier', - ImportNamespaceSpecifier: 'ImportNamespaceSpecifier', - ImportSpecifier: 'ImportSpecifier', - Literal: 'Literal', - LabeledStatement: 'LabeledStatement', - LogicalExpression: 'LogicalExpression', - MemberExpression: 'MemberExpression', - MetaProperty: 'MetaProperty', - MethodDefinition: 'MethodDefinition', - NewExpression: 'NewExpression', - ObjectExpression: 'ObjectExpression', - ObjectPattern: 'ObjectPattern', - Program: 'Program', - Property: 'Property', - RestElement: 'RestElement', - ReturnStatement: 'ReturnStatement', - SequenceExpression: 'SequenceExpression', - SpreadElement: 'SpreadElement', - Super: 'Super', - SwitchCase: 'SwitchCase', - SwitchStatement: 'SwitchStatement', - TaggedTemplateExpression: 'TaggedTemplateExpression', - TemplateElement: 'TemplateElement', - TemplateLiteral: 'TemplateLiteral', - ThisExpression: 'ThisExpression', - ThrowStatement: 'ThrowStatement', - TryStatement: 'TryStatement', - UnaryExpression: 'UnaryExpression', - UpdateExpression: 'UpdateExpression', - VariableDeclaration: 'VariableDeclaration', - VariableDeclarator: 'VariableDeclarator', - WhileStatement: 'WhileStatement', - WithStatement: 'WithStatement', - YieldExpression: 'YieldExpression' - }; - - PlaceHolders = { - ArrowParameterPlaceHolder: 'ArrowParameterPlaceHolder' - }; - - // Error messages should be identical to V8. - Messages = { - UnexpectedToken: 'Unexpected token %0', - UnexpectedNumber: 'Unexpected number', - UnexpectedString: 'Unexpected string', - UnexpectedIdentifier: 'Unexpected identifier', - UnexpectedReserved: 'Unexpected reserved word', - UnexpectedTemplate: 'Unexpected quasi %0', - UnexpectedEOS: 'Unexpected end of input', - NewlineAfterThrow: 'Illegal newline after throw', - InvalidRegExp: 'Invalid regular expression', - UnterminatedRegExp: 'Invalid regular expression: missing /', - InvalidLHSInAssignment: 'Invalid left-hand side in assignment', - InvalidLHSInForIn: 'Invalid left-hand side in for-in', - InvalidLHSInForLoop: 'Invalid left-hand side in for-loop', - MultipleDefaultsInSwitch: 'More than one default clause in switch statement', - NoCatchOrFinally: 'Missing catch or finally after try', - UnknownLabel: 'Undefined label \'%0\'', - Redeclaration: '%0 \'%1\' has already been declared', - IllegalContinue: 'Illegal continue statement', - IllegalBreak: 'Illegal break statement', - IllegalReturn: 'Illegal return statement', - StrictModeWith: 'Strict mode code may not include a with statement', - StrictCatchVariable: 'Catch variable may not be eval or arguments in strict mode', - StrictVarName: 'Variable name may not be eval or arguments in strict mode', - StrictParamName: 'Parameter name eval or arguments is not allowed in strict mode', - StrictParamDupe: 'Strict mode function may not have duplicate parameter names', - StrictFunctionName: 'Function name may not be eval or arguments in strict mode', - StrictOctalLiteral: 'Octal literals are not allowed in strict mode.', - StrictDelete: 'Delete of an unqualified identifier in strict mode.', - StrictLHSAssignment: 'Assignment to eval or arguments is not allowed in strict mode', - StrictLHSPostfix: 'Postfix increment/decrement may not have eval or arguments operand in strict mode', - StrictLHSPrefix: 'Prefix increment/decrement may not have eval or arguments operand in strict mode', - StrictReservedWord: 'Use of future reserved word in strict mode', - TemplateOctalLiteral: 'Octal literals are not allowed in template strings.', - ParameterAfterRestParameter: 'Rest parameter must be last formal parameter', - DefaultRestParameter: 'Unexpected token =', - ObjectPatternAsRestParameter: 'Unexpected token {', - DuplicateProtoProperty: 'Duplicate __proto__ fields are not allowed in object literals', - ConstructorSpecialMethod: 'Class constructor may not be an accessor', - DuplicateConstructor: 'A class may only have one constructor', - StaticPrototype: 'Classes may not have static property named prototype', - MissingFromClause: 'Unexpected token', - NoAsAfterImportNamespace: 'Unexpected token', - InvalidModuleSpecifier: 'Unexpected token', - IllegalImportDeclaration: 'Unexpected token', - IllegalExportDeclaration: 'Unexpected token', - DuplicateBinding: 'Duplicate binding %0' - }; - - // See also tools/generate-unicode-regex.js. - Regex = { - // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierStart: - NonAsciiIdentifierStart: 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- - // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierPart: - NonAsciiIdentifierPart: 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- }; - - // Ensure the condition is true, otherwise throw an error. - // This is only to have a better contract semantic, i.e. another safety net - // to catch a logic error. The condition shall be fulfilled in normal case. - // Do NOT use this to enforce a certain condition on any user input. - - function assert(condition, message) { - /* istanbul ignore if */ - if (!condition) { - throw new Error('ASSERT: ' + message); - } - } - - function isDecimalDigit(ch) { - return (ch >= 0x30 && ch <= 0x39); // 0..9 - } - - function isHexDigit(ch) { - return '0123456789abcdefABCDEF'.indexOf(ch) >= 0; - } - - function isOctalDigit(ch) { - return '01234567'.indexOf(ch) >= 0; - } - - function octalToDecimal(ch) { - // \0 is not octal escape sequence - var octal = (ch !== '0'), code = '01234567'.indexOf(ch); - - if (index < length && isOctalDigit(source[index])) { - octal = true; - code = code * 8 + '01234567'.indexOf(source[index++]); - - // 3 digits are only allowed when string starts - // with 0, 1, 2, 3 - if ('0123'.indexOf(ch) >= 0 && - index < length && - isOctalDigit(source[index])) { - code = code * 8 + '01234567'.indexOf(source[index++]); - } - } - - return { - code: code, - octal: octal - }; - } - - // ECMA-262 11.2 White Space - - function isWhiteSpace(ch) { - return (ch === 0x20) || (ch === 0x09) || (ch === 0x0B) || (ch === 0x0C) || (ch === 0xA0) || - (ch >= 0x1680 && [0x1680, 0x180E, 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200A, 0x202F, 0x205F, 0x3000, 0xFEFF].indexOf(ch) >= 0); - } - - // ECMA-262 11.3 Line Terminators - - function isLineTerminator(ch) { - return (ch === 0x0A) || (ch === 0x0D) || (ch === 0x2028) || (ch === 0x2029); - } - - // ECMA-262 11.6 Identifier Names and Identifiers - - function fromCodePoint(cp) { - return (cp < 0x10000) ? String.fromCharCode(cp) : - String.fromCharCode(0xD800 + ((cp - 0x10000) >> 10)) + - String.fromCharCode(0xDC00 + ((cp - 0x10000) & 1023)); - } - - function isIdentifierStart(ch) { - return (ch === 0x24) || (ch === 0x5F) || // $ (dollar) and _ (underscore) - (ch >= 0x41 && ch <= 0x5A) || // A..Z - (ch >= 0x61 && ch <= 0x7A) || // a..z - (ch === 0x5C) || // \ (backslash) - ((ch >= 0x80) && Regex.NonAsciiIdentifierStart.test(fromCodePoint(ch))); - } - - function isIdentifierPart(ch) { - return (ch === 0x24) || (ch === 0x5F) || // $ (dollar) and _ (underscore) - (ch >= 0x41 && ch <= 0x5A) || // A..Z - (ch >= 0x61 && ch <= 0x7A) || // a..z - (ch >= 0x30 && ch <= 0x39) || // 0..9 - (ch === 0x5C) || // \ (backslash) - ((ch >= 0x80) && Regex.NonAsciiIdentifierPart.test(fromCodePoint(ch))); - } - - // ECMA-262 11.6.2.2 Future Reserved Words - - function isFutureReservedWord(id) { - switch (id) { - case 'enum': - case 'export': - case 'import': - case 'super': - return true; - default: - return false; - } - } - - function isStrictModeReservedWord(id) { - switch (id) { - case 'implements': - case 'interface': - case 'package': - case 'private': - case 'protected': - case 'public': - case 'static': - case 'yield': - case 'let': - return true; - default: - return false; - } - } - - function isRestrictedWord(id) { - return id === 'eval' || id === 'arguments'; - } - - // ECMA-262 11.6.2.1 Keywords - - function isKeyword(id) { - - // 'const' is specialized as Keyword in V8. - // 'yield' and 'let' are for compatibility with SpiderMonkey and ES.next. - // Some others are from future reserved words. - - switch (id.length) { - case 2: - return (id === 'if') || (id === 'in') || (id === 'do'); - case 3: - return (id === 'var') || (id === 'for') || (id === 'new') || - (id === 'try') || (id === 'let'); - case 4: - return (id === 'this') || (id === 'else') || (id === 'case') || - (id === 'void') || (id === 'with') || (id === 'enum'); - case 5: - return (id === 'while') || (id === 'break') || (id === 'catch') || - (id === 'throw') || (id === 'const') || (id === 'yield') || - (id === 'class') || (id === 'super'); - case 6: - return (id === 'return') || (id === 'typeof') || (id === 'delete') || - (id === 'switch') || (id === 'export') || (id === 'import'); - case 7: - return (id === 'default') || (id === 'finally') || (id === 'extends'); - case 8: - return (id === 'function') || (id === 'continue') || (id === 'debugger'); - case 10: - return (id === 'instanceof'); - default: - return false; - } - } - - // ECMA-262 11.4 Comments - - function addComment(type, value, start, end, loc) { - var comment; - - assert(typeof start === 'number', 'Comment must have valid position'); - - state.lastCommentStart = start; - - comment = { - type: type, - value: value - }; - if (extra.range) { - comment.range = [start, end]; - } - if (extra.loc) { - comment.loc = loc; - } - extra.comments.push(comment); - if (extra.attachComment) { - extra.leadingComments.push(comment); - extra.trailingComments.push(comment); - } - } - - function skipSingleLineComment(offset) { - var start, loc, ch, comment; - - start = index - offset; - loc = { - start: { - line: lineNumber, - column: index - lineStart - offset - } - }; - - while (index < length) { - ch = source.charCodeAt(index); - ++index; - if (isLineTerminator(ch)) { - hasLineTerminator = true; - if (extra.comments) { - comment = source.slice(start + offset, index - 1); - loc.end = { - line: lineNumber, - column: index - lineStart - 1 - }; - addComment('Line', comment, start, index - 1, loc); - } - if (ch === 13 && source.charCodeAt(index) === 10) { - ++index; - } - ++lineNumber; - lineStart = index; - return; - } - } - - if (extra.comments) { - comment = source.slice(start + offset, index); - loc.end = { - line: lineNumber, - column: index - lineStart - }; - addComment('Line', comment, start, index, loc); - } - } - - function skipMultiLineComment() { - var start, loc, ch, comment; - - if (extra.comments) { - start = index - 2; - loc = { - start: { - line: lineNumber, - column: index - lineStart - 2 - } - }; - } - - while (index < length) { - ch = source.charCodeAt(index); - if (isLineTerminator(ch)) { - if (ch === 0x0D && source.charCodeAt(index + 1) === 0x0A) { - ++index; - } - hasLineTerminator = true; - ++lineNumber; - ++index; - lineStart = index; - } else if (ch === 0x2A) { - // Block comment ends with '*/'. - if (source.charCodeAt(index + 1) === 0x2F) { - ++index; - ++index; - if (extra.comments) { - comment = source.slice(start + 2, index - 2); - loc.end = { - line: lineNumber, - column: index - lineStart - }; - addComment('Block', comment, start, index, loc); - } - return; - } - ++index; - } else { - ++index; - } - } - - // Ran off the end of the file - the whole thing is a comment - if (extra.comments) { - loc.end = { - line: lineNumber, - column: index - lineStart - }; - comment = source.slice(start + 2, index); - addComment('Block', comment, start, index, loc); - } - tolerateUnexpectedToken(); - } - - function skipComment() { - var ch, start; - hasLineTerminator = false; - - start = (index === 0); - while (index < length) { - ch = source.charCodeAt(index); - - if (isWhiteSpace(ch)) { - ++index; - } else if (isLineTerminator(ch)) { - hasLineTerminator = true; - ++index; - if (ch === 0x0D && source.charCodeAt(index) === 0x0A) { - ++index; - } - ++lineNumber; - lineStart = index; - start = true; - } else if (ch === 0x2F) { // U+002F is '/' - ch = source.charCodeAt(index + 1); - if (ch === 0x2F) { - ++index; - ++index; - skipSingleLineComment(2); - start = true; - } else if (ch === 0x2A) { // U+002A is '*' - ++index; - ++index; - skipMultiLineComment(); - } else { - break; - } - } else if (start && ch === 0x2D) { // U+002D is '-' - // U+003E is '>' - if ((source.charCodeAt(index + 1) === 0x2D) && (source.charCodeAt(index + 2) === 0x3E)) { - // '-->' is a single-line comment - index += 3; - skipSingleLineComment(3); - } else { - break; - } - } else if (ch === 0x3C) { // U+003C is '<' - if (source.slice(index + 1, index + 4) === '!--') { - ++index; // `<` - ++index; // `!` - ++index; // `-` - ++index; // `-` - skipSingleLineComment(4); - } else { - break; - } - } else { - break; - } - } - } - - function scanHexEscape(prefix) { - var i, len, ch, code = 0; - - len = (prefix === 'u') ? 4 : 2; - for (i = 0; i < len; ++i) { - if (index < length && isHexDigit(source[index])) { - ch = source[index++]; - code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase()); - } else { - return ''; - } - } - return String.fromCharCode(code); - } - - function scanUnicodeCodePointEscape() { - var ch, code; - - ch = source[index]; - code = 0; - - // At least, one hex digit is required. - if (ch === '}') { - throwUnexpectedToken(); - } - - while (index < length) { - ch = source[index++]; - if (!isHexDigit(ch)) { - break; - } - code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase()); - } - - if (code > 0x10FFFF || ch !== '}') { - throwUnexpectedToken(); - } - - return fromCodePoint(code); - } - - function codePointAt(i) { - var cp, first, second; - - cp = source.charCodeAt(i); - if (cp >= 0xD800 && cp <= 0xDBFF) { - second = source.charCodeAt(i + 1); - if (second >= 0xDC00 && second <= 0xDFFF) { - first = cp; - cp = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000; - } - } - - return cp; - } - - function getComplexIdentifier() { - var cp, ch, id; - - cp = codePointAt(index); - id = fromCodePoint(cp); - index += id.length; - - // '\u' (U+005C, U+0075) denotes an escaped character. - if (cp === 0x5C) { - if (source.charCodeAt(index) !== 0x75) { - throwUnexpectedToken(); - } - ++index; - if (source[index] === '{') { - ++index; - ch = scanUnicodeCodePointEscape(); - } else { - ch = scanHexEscape('u'); - cp = ch.charCodeAt(0); - if (!ch || ch === '\\' || !isIdentifierStart(cp)) { - throwUnexpectedToken(); - } - } - id = ch; - } - - while (index < length) { - cp = codePointAt(index); - if (!isIdentifierPart(cp)) { - break; - } - ch = fromCodePoint(cp); - id += ch; - index += ch.length; - - // '\u' (U+005C, U+0075) denotes an escaped character. - if (cp === 0x5C) { - id = id.substr(0, id.length - 1); - if (source.charCodeAt(index) !== 0x75) { - throwUnexpectedToken(); - } - ++index; - if (source[index] === '{') { - ++index; - ch = scanUnicodeCodePointEscape(); - } else { - ch = scanHexEscape('u'); - cp = ch.charCodeAt(0); - if (!ch || ch === '\\' || !isIdentifierPart(cp)) { - throwUnexpectedToken(); - } - } - id += ch; - } - } - - return id; - } - - function getIdentifier() { - var start, ch; - - start = index++; - while (index < length) { - ch = source.charCodeAt(index); - if (ch === 0x5C) { - // Blackslash (U+005C) marks Unicode escape sequence. - index = start; - return getComplexIdentifier(); - } else if (ch >= 0xD800 && ch < 0xDFFF) { - // Need to handle surrogate pairs. - index = start; - return getComplexIdentifier(); - } - if (isIdentifierPart(ch)) { - ++index; - } else { - break; - } - } - - return source.slice(start, index); - } - - function scanIdentifier() { - var start, id, type; - - start = index; - - // Backslash (U+005C) starts an escaped character. - id = (source.charCodeAt(index) === 0x5C) ? getComplexIdentifier() : getIdentifier(); - - // There is no keyword or literal with only one character. - // Thus, it must be an identifier. - if (id.length === 1) { - type = Token.Identifier; - } else if (isKeyword(id)) { - type = Token.Keyword; - } else if (id === 'null') { - type = Token.NullLiteral; - } else if (id === 'true' || id === 'false') { - type = Token.BooleanLiteral; - } else { - type = Token.Identifier; - } - - return { - type: type, - value: id, - lineNumber: lineNumber, - lineStart: lineStart, - start: start, - end: index - }; - } - - - // ECMA-262 11.7 Punctuators - - function scanPunctuator() { - var token, str; - - token = { - type: Token.Punctuator, - value: '', - lineNumber: lineNumber, - lineStart: lineStart, - start: index, - end: index - }; - - // Check for most common single-character punctuators. - str = source[index]; - switch (str) { - - case '(': - if (extra.tokenize) { - extra.openParenToken = extra.tokens.length; - } - ++index; - break; - - case '{': - if (extra.tokenize) { - extra.openCurlyToken = extra.tokens.length; - } - state.curlyStack.push('{'); - ++index; - break; - - case '.': - ++index; - if (source[index] === '.' && source[index + 1] === '.') { - // Spread operator: ... - index += 2; - str = '...'; - } - break; - - case '}': - ++index; - state.curlyStack.pop(); - break; - case ')': - case ';': - case ',': - case '[': - case ']': - case ':': - case '?': - case '~': - ++index; - break; - - default: - // 4-character punctuator. - str = source.substr(index, 4); - if (str === '>>>=') { - index += 4; - } else { - - // 3-character punctuators. - str = str.substr(0, 3); - if (str === '===' || str === '!==' || str === '>>>' || - str === '<<=' || str === '>>=') { - index += 3; - } else { - - // 2-character punctuators. - str = str.substr(0, 2); - if (str === '&&' || str === '||' || str === '==' || str === '!=' || - str === '+=' || str === '-=' || str === '*=' || str === '/=' || - str === '++' || str === '--' || str === '<<' || str === '>>' || - str === '&=' || str === '|=' || str === '^=' || str === '%=' || - str === '<=' || str === '>=' || str === '=>') { - index += 2; - } else { - - // 1-character punctuators. - str = source[index]; - if ('<>=!+-*%&|^/'.indexOf(str) >= 0) { - ++index; - } - } - } - } - } - - if (index === token.start) { - throwUnexpectedToken(); - } - - token.end = index; - token.value = str; - return token; - } - - // ECMA-262 11.8.3 Numeric Literals - - function scanHexLiteral(start) { - var number = ''; - - while (index < length) { - if (!isHexDigit(source[index])) { - break; - } - number += source[index++]; - } - - if (number.length === 0) { - throwUnexpectedToken(); - } - - if (isIdentifierStart(source.charCodeAt(index))) { - throwUnexpectedToken(); - } - - return { - type: Token.NumericLiteral, - value: parseInt('0x' + number, 16), - lineNumber: lineNumber, - lineStart: lineStart, - start: start, - end: index - }; - } - - function scanBinaryLiteral(start) { - var ch, number; - - number = ''; - - while (index < length) { - ch = source[index]; - if (ch !== '0' && ch !== '1') { - break; - } - number += source[index++]; - } - - if (number.length === 0) { - // only 0b or 0B - throwUnexpectedToken(); - } - - if (index < length) { - ch = source.charCodeAt(index); - /* istanbul ignore else */ - if (isIdentifierStart(ch) || isDecimalDigit(ch)) { - throwUnexpectedToken(); - } - } - - return { - type: Token.NumericLiteral, - value: parseInt(number, 2), - lineNumber: lineNumber, - lineStart: lineStart, - start: start, - end: index - }; - } - - function scanOctalLiteral(prefix, start) { - var number, octal; - - if (isOctalDigit(prefix)) { - octal = true; - number = '0' + source[index++]; - } else { - octal = false; - ++index; - number = ''; - } - - while (index < length) { - if (!isOctalDigit(source[index])) { - break; - } - number += source[index++]; - } - - if (!octal && number.length === 0) { - // only 0o or 0O - throwUnexpectedToken(); - } - - if (isIdentifierStart(source.charCodeAt(index)) || isDecimalDigit(source.charCodeAt(index))) { - throwUnexpectedToken(); - } - - return { - type: Token.NumericLiteral, - value: parseInt(number, 8), - octal: octal, - lineNumber: lineNumber, - lineStart: lineStart, - start: start, - end: index - }; - } - - function isImplicitOctalLiteral() { - var i, ch; - - // Implicit octal, unless there is a non-octal digit. - // (Annex B.1.1 on Numeric Literals) - for (i = index + 1; i < length; ++i) { - ch = source[i]; - if (ch === '8' || ch === '9') { - return false; - } - if (!isOctalDigit(ch)) { - return true; - } - } - - return true; - } - - function scanNumericLiteral() { - var number, start, ch; - - ch = source[index]; - assert(isDecimalDigit(ch.charCodeAt(0)) || (ch === '.'), - 'Numeric literal must start with a decimal digit or a decimal point'); - - start = index; - number = ''; - if (ch !== '.') { - number = source[index++]; - ch = source[index]; - - // Hex number starts with '0x'. - // Octal number starts with '0'. - // Octal number in ES6 starts with '0o'. - // Binary number in ES6 starts with '0b'. - if (number === '0') { - if (ch === 'x' || ch === 'X') { - ++index; - return scanHexLiteral(start); - } - if (ch === 'b' || ch === 'B') { - ++index; - return scanBinaryLiteral(start); - } - if (ch === 'o' || ch === 'O') { - return scanOctalLiteral(ch, start); - } - - if (isOctalDigit(ch)) { - if (isImplicitOctalLiteral()) { - return scanOctalLiteral(ch, start); - } - } - } - - while (isDecimalDigit(source.charCodeAt(index))) { - number += source[index++]; - } - ch = source[index]; - } - - if (ch === '.') { - number += source[index++]; - while (isDecimalDigit(source.charCodeAt(index))) { - number += source[index++]; - } - ch = source[index]; - } - - if (ch === 'e' || ch === 'E') { - number += source[index++]; - - ch = source[index]; - if (ch === '+' || ch === '-') { - number += source[index++]; - } - if (isDecimalDigit(source.charCodeAt(index))) { - while (isDecimalDigit(source.charCodeAt(index))) { - number += source[index++]; - } - } else { - throwUnexpectedToken(); - } - } - - if (isIdentifierStart(source.charCodeAt(index))) { - throwUnexpectedToken(); - } - - return { - type: Token.NumericLiteral, - value: parseFloat(number), - lineNumber: lineNumber, - lineStart: lineStart, - start: start, - end: index - }; - } - - // ECMA-262 11.8.4 String Literals - - function scanStringLiteral() { - var str = '', quote, start, ch, unescaped, octToDec, octal = false; - - quote = source[index]; - assert((quote === '\'' || quote === '"'), - 'String literal must starts with a quote'); - - start = index; - ++index; - - while (index < length) { - ch = source[index++]; - - if (ch === quote) { - quote = ''; - break; - } else if (ch === '\\') { - ch = source[index++]; - if (!ch || !isLineTerminator(ch.charCodeAt(0))) { - switch (ch) { - case 'u': - case 'x': - if (source[index] === '{') { - ++index; - str += scanUnicodeCodePointEscape(); - } else { - unescaped = scanHexEscape(ch); - if (!unescaped) { - throw throwUnexpectedToken(); - } - str += unescaped; - } - break; - case 'n': - str += '\n'; - break; - case 'r': - str += '\r'; - break; - case 't': - str += '\t'; - break; - case 'b': - str += '\b'; - break; - case 'f': - str += '\f'; - break; - case 'v': - str += '\x0B'; - break; - case '8': - case '9': - str += ch; - tolerateUnexpectedToken(); - break; - - default: - if (isOctalDigit(ch)) { - octToDec = octalToDecimal(ch); - - octal = octToDec.octal || octal; - str += String.fromCharCode(octToDec.code); - } else { - str += ch; - } - break; - } - } else { - ++lineNumber; - if (ch === '\r' && source[index] === '\n') { - ++index; - } - lineStart = index; - } - } else if (isLineTerminator(ch.charCodeAt(0))) { - break; - } else { - str += ch; - } - } - - if (quote !== '') { - throwUnexpectedToken(); - } - - return { - type: Token.StringLiteral, - value: str, - octal: octal, - lineNumber: startLineNumber, - lineStart: startLineStart, - start: start, - end: index - }; - } - - // ECMA-262 11.8.6 Template Literal Lexical Components - - function scanTemplate() { - var cooked = '', ch, start, rawOffset, terminated, head, tail, restore, unescaped; - - terminated = false; - tail = false; - start = index; - head = (source[index] === '`'); - rawOffset = 2; - - ++index; - - while (index < length) { - ch = source[index++]; - if (ch === '`') { - rawOffset = 1; - tail = true; - terminated = true; - break; - } else if (ch === '$') { - if (source[index] === '{') { - state.curlyStack.push('${'); - ++index; - terminated = true; - break; - } - cooked += ch; - } else if (ch === '\\') { - ch = source[index++]; - if (!isLineTerminator(ch.charCodeAt(0))) { - switch (ch) { - case 'n': - cooked += '\n'; - break; - case 'r': - cooked += '\r'; - break; - case 't': - cooked += '\t'; - break; - case 'u': - case 'x': - if (source[index] === '{') { - ++index; - cooked += scanUnicodeCodePointEscape(); - } else { - restore = index; - unescaped = scanHexEscape(ch); - if (unescaped) { - cooked += unescaped; - } else { - index = restore; - cooked += ch; - } - } - break; - case 'b': - cooked += '\b'; - break; - case 'f': - cooked += '\f'; - break; - case 'v': - cooked += '\v'; - break; - - default: - if (ch === '0') { - if (isDecimalDigit(source.charCodeAt(index))) { - // Illegal: \01 \02 and so on - throwError(Messages.TemplateOctalLiteral); - } - cooked += '\0'; - } else if (isOctalDigit(ch)) { - // Illegal: \1 \2 - throwError(Messages.TemplateOctalLiteral); - } else { - cooked += ch; - } - break; - } - } else { - ++lineNumber; - if (ch === '\r' && source[index] === '\n') { - ++index; - } - lineStart = index; - } - } else if (isLineTerminator(ch.charCodeAt(0))) { - ++lineNumber; - if (ch === '\r' && source[index] === '\n') { - ++index; - } - lineStart = index; - cooked += '\n'; - } else { - cooked += ch; - } - } - - if (!terminated) { - throwUnexpectedToken(); - } - - if (!head) { - state.curlyStack.pop(); - } - - return { - type: Token.Template, - value: { - cooked: cooked, - raw: source.slice(start + 1, index - rawOffset) - }, - head: head, - tail: tail, - lineNumber: lineNumber, - lineStart: lineStart, - start: start, - end: index - }; - } - - // ECMA-262 11.8.5 Regular Expression Literals - - function testRegExp(pattern, flags) { - // The BMP character to use as a replacement for astral symbols when - // translating an ES6 "u"-flagged pattern to an ES5-compatible - // approximation. - // Note: replacing with '\uFFFF' enables false positives in unlikely - // scenarios. For example, `[\u{1044f}-\u{10440}]` is an invalid - // pattern that would not be detected by this substitution. - var astralSubstitute = '\uFFFF', - tmp = pattern; - - if (flags.indexOf('u') >= 0) { - tmp = tmp - // Replace every Unicode escape sequence with the equivalent - // BMP character or a constant ASCII code point in the case of - // astral symbols. (See the above note on `astralSubstitute` - // for more information.) - .replace(/\\u\{([0-9a-fA-F]+)\}|\\u([a-fA-F0-9]{4})/g, function ($0, $1, $2) { - var codePoint = parseInt($1 || $2, 16); - if (codePoint > 0x10FFFF) { - throwUnexpectedToken(null, Messages.InvalidRegExp); - } - if (codePoint <= 0xFFFF) { - return String.fromCharCode(codePoint); - } - return astralSubstitute; - }) - // Replace each paired surrogate with a single ASCII symbol to - // avoid throwing on regular expressions that are only valid in - // combination with the "u" flag. - .replace( - /[\uD800-\uDBFF][\uDC00-\uDFFF]/g, - astralSubstitute - ); - } - - // First, detect invalid regular expressions. - try { - RegExp(tmp); - } catch (e) { - throwUnexpectedToken(null, Messages.InvalidRegExp); - } - - // Return a regular expression object for this pattern-flag pair, or - // `null` in case the current environment doesn't support the flags it - // uses. - try { - return new RegExp(pattern, flags); - } catch (exception) { - return null; - } - } - - function scanRegExpBody() { - var ch, str, classMarker, terminated, body; - - ch = source[index]; - assert(ch === '/', 'Regular expression literal must start with a slash'); - str = source[index++]; - - classMarker = false; - terminated = false; - while (index < length) { - ch = source[index++]; - str += ch; - if (ch === '\\') { - ch = source[index++]; - // ECMA-262 7.8.5 - if (isLineTerminator(ch.charCodeAt(0))) { - throwUnexpectedToken(null, Messages.UnterminatedRegExp); - } - str += ch; - } else if (isLineTerminator(ch.charCodeAt(0))) { - throwUnexpectedToken(null, Messages.UnterminatedRegExp); - } else if (classMarker) { - if (ch === ']') { - classMarker = false; - } - } else { - if (ch === '/') { - terminated = true; - break; - } else if (ch === '[') { - classMarker = true; - } - } - } - - if (!terminated) { - throwUnexpectedToken(null, Messages.UnterminatedRegExp); - } - - // Exclude leading and trailing slash. - body = str.substr(1, str.length - 2); - return { - value: body, - literal: str - }; - } - - function scanRegExpFlags() { - var ch, str, flags, restore; - - str = ''; - flags = ''; - while (index < length) { - ch = source[index]; - if (!isIdentifierPart(ch.charCodeAt(0))) { - break; - } - - ++index; - if (ch === '\\' && index < length) { - ch = source[index]; - if (ch === 'u') { - ++index; - restore = index; - ch = scanHexEscape('u'); - if (ch) { - flags += ch; - for (str += '\\u'; restore < index; ++restore) { - str += source[restore]; - } - } else { - index = restore; - flags += 'u'; - str += '\\u'; - } - tolerateUnexpectedToken(); - } else { - str += '\\'; - tolerateUnexpectedToken(); - } - } else { - flags += ch; - str += ch; - } - } - - return { - value: flags, - literal: str - }; - } - - function scanRegExp() { - var start, body, flags, value; - scanning = true; - - lookahead = null; - skipComment(); - start = index; - - body = scanRegExpBody(); - flags = scanRegExpFlags(); - value = testRegExp(body.value, flags.value); - scanning = false; - if (extra.tokenize) { - return { - type: Token.RegularExpression, - value: value, - regex: { - pattern: body.value, - flags: flags.value - }, - lineNumber: lineNumber, - lineStart: lineStart, - start: start, - end: index - }; - } - - return { - literal: body.literal + flags.literal, - value: value, - regex: { - pattern: body.value, - flags: flags.value - }, - start: start, - end: index - }; - } - - function collectRegex() { - var pos, loc, regex, token; - - skipComment(); - - pos = index; - loc = { - start: { - line: lineNumber, - column: index - lineStart - } - }; - - regex = scanRegExp(); - - loc.end = { - line: lineNumber, - column: index - lineStart - }; - - /* istanbul ignore next */ - if (!extra.tokenize) { - // Pop the previous token, which is likely '/' or '/=' - if (extra.tokens.length > 0) { - token = extra.tokens[extra.tokens.length - 1]; - if (token.range[0] === pos && token.type === 'Punctuator') { - if (token.value === '/' || token.value === '/=') { - extra.tokens.pop(); - } - } - } - - extra.tokens.push({ - type: 'RegularExpression', - value: regex.literal, - regex: regex.regex, - range: [pos, index], - loc: loc - }); - } - - return regex; - } - - function isIdentifierName(token) { - return token.type === Token.Identifier || - token.type === Token.Keyword || - token.type === Token.BooleanLiteral || - token.type === Token.NullLiteral; - } - - function advanceSlash() { - var prevToken, - checkToken; - // Using the following algorithm: - // https://github.com/mozilla/sweet.js/wiki/design - prevToken = extra.tokens[extra.tokens.length - 1]; - if (!prevToken) { - // Nothing before that: it cannot be a division. - return collectRegex(); - } - if (prevToken.type === 'Punctuator') { - if (prevToken.value === ']') { - return scanPunctuator(); - } - if (prevToken.value === ')') { - checkToken = extra.tokens[extra.openParenToken - 1]; - if (checkToken && - checkToken.type === 'Keyword' && - (checkToken.value === 'if' || - checkToken.value === 'while' || - checkToken.value === 'for' || - checkToken.value === 'with')) { - return collectRegex(); - } - return scanPunctuator(); - } - if (prevToken.value === '}') { - // Dividing a function by anything makes little sense, - // but we have to check for that. - if (extra.tokens[extra.openCurlyToken - 3] && - extra.tokens[extra.openCurlyToken - 3].type === 'Keyword') { - // Anonymous function. - checkToken = extra.tokens[extra.openCurlyToken - 4]; - if (!checkToken) { - return scanPunctuator(); - } - } else if (extra.tokens[extra.openCurlyToken - 4] && - extra.tokens[extra.openCurlyToken - 4].type === 'Keyword') { - // Named function. - checkToken = extra.tokens[extra.openCurlyToken - 5]; - if (!checkToken) { - return collectRegex(); - } - } else { - return scanPunctuator(); - } - // checkToken determines whether the function is - // a declaration or an expression. - if (FnExprTokens.indexOf(checkToken.value) >= 0) { - // It is an expression. - return scanPunctuator(); - } - // It is a declaration. - return collectRegex(); - } - return collectRegex(); - } - if (prevToken.type === 'Keyword' && prevToken.value !== 'this') { - return collectRegex(); - } - return scanPunctuator(); - } - - function advance() { - var cp, token; - - if (index >= length) { - return { - type: Token.EOF, - lineNumber: lineNumber, - lineStart: lineStart, - start: index, - end: index - }; - } - - cp = source.charCodeAt(index); - - if (isIdentifierStart(cp)) { - token = scanIdentifier(); - if (strict && isStrictModeReservedWord(token.value)) { - token.type = Token.Keyword; - } - return token; - } - - // Very common: ( and ) and ; - if (cp === 0x28 || cp === 0x29 || cp === 0x3B) { - return scanPunctuator(); - } - - // String literal starts with single quote (U+0027) or double quote (U+0022). - if (cp === 0x27 || cp === 0x22) { - return scanStringLiteral(); - } - - // Dot (.) U+002E can also start a floating-point number, hence the need - // to check the next character. - if (cp === 0x2E) { - if (isDecimalDigit(source.charCodeAt(index + 1))) { - return scanNumericLiteral(); - } - return scanPunctuator(); - } - - if (isDecimalDigit(cp)) { - return scanNumericLiteral(); - } - - // Slash (/) U+002F can also start a regex. - if (extra.tokenize && cp === 0x2F) { - return advanceSlash(); - } - - // Template literals start with ` (U+0060) for template head - // or } (U+007D) for template middle or template tail. - if (cp === 0x60 || (cp === 0x7D && state.curlyStack[state.curlyStack.length - 1] === '${')) { - return scanTemplate(); - } - - // Possible identifier start in a surrogate pair. - if (cp >= 0xD800 && cp < 0xDFFF) { - cp = codePointAt(index); - if (isIdentifierStart(cp)) { - return scanIdentifier(); - } - } - - return scanPunctuator(); - } - - function collectToken() { - var loc, token, value, entry; - - loc = { - start: { - line: lineNumber, - column: index - lineStart - } - }; - - token = advance(); - loc.end = { - line: lineNumber, - column: index - lineStart - }; - - if (token.type !== Token.EOF) { - value = source.slice(token.start, token.end); - entry = { - type: TokenName[token.type], - value: value, - range: [token.start, token.end], - loc: loc - }; - if (token.regex) { - entry.regex = { - pattern: token.regex.pattern, - flags: token.regex.flags - }; - } - extra.tokens.push(entry); - } - - return token; - } - - function lex() { - var token; - scanning = true; - - lastIndex = index; - lastLineNumber = lineNumber; - lastLineStart = lineStart; - - skipComment(); - - token = lookahead; - - startIndex = index; - startLineNumber = lineNumber; - startLineStart = lineStart; - - lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance(); - scanning = false; - return token; - } - - function peek() { - scanning = true; - - skipComment(); - - lastIndex = index; - lastLineNumber = lineNumber; - lastLineStart = lineStart; - - startIndex = index; - startLineNumber = lineNumber; - startLineStart = lineStart; - - lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance(); - scanning = false; - } - - function Position() { - this.line = startLineNumber; - this.column = startIndex - startLineStart; - } - - function SourceLocation() { - this.start = new Position(); - this.end = null; - } - - function WrappingSourceLocation(startToken) { - this.start = { - line: startToken.lineNumber, - column: startToken.start - startToken.lineStart - }; - this.end = null; - } - - function Node() { - if (extra.range) { - this.range = [startIndex, 0]; - } - if (extra.loc) { - this.loc = new SourceLocation(); - } - } - - function WrappingNode(startToken) { - if (extra.range) { - this.range = [startToken.start, 0]; - } - if (extra.loc) { - this.loc = new WrappingSourceLocation(startToken); - } - } - - WrappingNode.prototype = Node.prototype = { - - processComment: function () { - var lastChild, - leadingComments, - trailingComments, - bottomRight = extra.bottomRightStack, - i, - comment, - last = bottomRight[bottomRight.length - 1]; - - if (this.type === Syntax.Program) { - if (this.body.length > 0) { - return; - } - } - - if (extra.trailingComments.length > 0) { - trailingComments = []; - for (i = extra.trailingComments.length - 1; i >= 0; --i) { - comment = extra.trailingComments[i]; - if (comment.range[0] >= this.range[1]) { - trailingComments.unshift(comment); - extra.trailingComments.splice(i, 1); - } - } - extra.trailingComments = []; - } else { - if (last && last.trailingComments && last.trailingComments[0].range[0] >= this.range[1]) { - trailingComments = last.trailingComments; - delete last.trailingComments; - } - } - - // Eating the stack. - while (last && last.range[0] >= this.range[0]) { - lastChild = bottomRight.pop(); - last = bottomRight[bottomRight.length - 1]; - } - - if (lastChild) { - if (lastChild.leadingComments) { - leadingComments = []; - for (i = lastChild.leadingComments.length - 1; i >= 0; --i) { - comment = lastChild.leadingComments[i]; - if (comment.range[1] <= this.range[0]) { - leadingComments.unshift(comment); - lastChild.leadingComments.splice(i, 1); - } - } - - if (!lastChild.leadingComments.length) { - lastChild.leadingComments = undefined; - } - } - } else if (extra.leadingComments.length > 0) { - leadingComments = []; - for (i = extra.leadingComments.length - 1; i >= 0; --i) { - comment = extra.leadingComments[i]; - if (comment.range[1] <= this.range[0]) { - leadingComments.unshift(comment); - extra.leadingComments.splice(i, 1); - } - } - } - - - if (leadingComments && leadingComments.length > 0) { - this.leadingComments = leadingComments; - } - if (trailingComments && trailingComments.length > 0) { - this.trailingComments = trailingComments; - } - - bottomRight.push(this); - }, - - finish: function () { - if (extra.range) { - this.range[1] = lastIndex; - } - if (extra.loc) { - this.loc.end = { - line: lastLineNumber, - column: lastIndex - lastLineStart - }; - if (extra.source) { - this.loc.source = extra.source; - } - } - - if (extra.attachComment) { - this.processComment(); - } - }, - - finishArrayExpression: function (elements) { - this.type = Syntax.ArrayExpression; - this.elements = elements; - this.finish(); - return this; - }, - - finishArrayPattern: function (elements) { - this.type = Syntax.ArrayPattern; - this.elements = elements; - this.finish(); - return this; - }, - - finishArrowFunctionExpression: function (params, defaults, body, expression) { - this.type = Syntax.ArrowFunctionExpression; - this.id = null; - this.params = params; - this.defaults = defaults; - this.body = body; - this.generator = false; - this.expression = expression; - this.finish(); - return this; - }, - - finishAssignmentExpression: function (operator, left, right) { - this.type = Syntax.AssignmentExpression; - this.operator = operator; - this.left = left; - this.right = right; - this.finish(); - return this; - }, - - finishAssignmentPattern: function (left, right) { - this.type = Syntax.AssignmentPattern; - this.left = left; - this.right = right; - this.finish(); - return this; - }, - - finishBinaryExpression: function (operator, left, right) { - this.type = (operator === '||' || operator === '&&') ? Syntax.LogicalExpression : Syntax.BinaryExpression; - this.operator = operator; - this.left = left; - this.right = right; - this.finish(); - return this; - }, - - finishBlockStatement: function (body) { - this.type = Syntax.BlockStatement; - this.body = body; - this.finish(); - return this; - }, - - finishBreakStatement: function (label) { - this.type = Syntax.BreakStatement; - this.label = label; - this.finish(); - return this; - }, - - finishCallExpression: function (callee, args) { - this.type = Syntax.CallExpression; - this.callee = callee; - this.arguments = args; - this.finish(); - return this; - }, - - finishCatchClause: function (param, body) { - this.type = Syntax.CatchClause; - this.param = param; - this.body = body; - this.finish(); - return this; - }, - - finishClassBody: function (body) { - this.type = Syntax.ClassBody; - this.body = body; - this.finish(); - return this; - }, - - finishClassDeclaration: function (id, superClass, body) { - this.type = Syntax.ClassDeclaration; - this.id = id; - this.superClass = superClass; - this.body = body; - this.finish(); - return this; - }, - - finishClassExpression: function (id, superClass, body) { - this.type = Syntax.ClassExpression; - this.id = id; - this.superClass = superClass; - this.body = body; - this.finish(); - return this; - }, - - finishConditionalExpression: function (test, consequent, alternate) { - this.type = Syntax.ConditionalExpression; - this.test = test; - this.consequent = consequent; - this.alternate = alternate; - this.finish(); - return this; - }, - - finishContinueStatement: function (label) { - this.type = Syntax.ContinueStatement; - this.label = label; - this.finish(); - return this; - }, - - finishDebuggerStatement: function () { - this.type = Syntax.DebuggerStatement; - this.finish(); - return this; - }, - - finishDoWhileStatement: function (body, test) { - this.type = Syntax.DoWhileStatement; - this.body = body; - this.test = test; - this.finish(); - return this; - }, - - finishEmptyStatement: function () { - this.type = Syntax.EmptyStatement; - this.finish(); - return this; - }, - - finishExpressionStatement: function (expression) { - this.type = Syntax.ExpressionStatement; - this.expression = expression; - this.finish(); - return this; - }, - - finishForStatement: function (init, test, update, body) { - this.type = Syntax.ForStatement; - this.init = init; - this.test = test; - this.update = update; - this.body = body; - this.finish(); - return this; - }, - - finishForOfStatement: function (left, right, body) { - this.type = Syntax.ForOfStatement; - this.left = left; - this.right = right; - this.body = body; - this.finish(); - return this; - }, - - finishForInStatement: function (left, right, body) { - this.type = Syntax.ForInStatement; - this.left = left; - this.right = right; - this.body = body; - this.each = false; - this.finish(); - return this; - }, - - finishFunctionDeclaration: function (id, params, defaults, body, generator) { - this.type = Syntax.FunctionDeclaration; - this.id = id; - this.params = params; - this.defaults = defaults; - this.body = body; - this.generator = generator; - this.expression = false; - this.finish(); - return this; - }, - - finishFunctionExpression: function (id, params, defaults, body, generator) { - this.type = Syntax.FunctionExpression; - this.id = id; - this.params = params; - this.defaults = defaults; - this.body = body; - this.generator = generator; - this.expression = false; - this.finish(); - return this; - }, - - finishIdentifier: function (name) { - this.type = Syntax.Identifier; - this.name = name; - this.finish(); - return this; - }, - - finishIfStatement: function (test, consequent, alternate) { - this.type = Syntax.IfStatement; - this.test = test; - this.consequent = consequent; - this.alternate = alternate; - this.finish(); - return this; - }, - - finishLabeledStatement: function (label, body) { - this.type = Syntax.LabeledStatement; - this.label = label; - this.body = body; - this.finish(); - return this; - }, - - finishLiteral: function (token) { - this.type = Syntax.Literal; - this.value = token.value; - this.raw = source.slice(token.start, token.end); - if (token.regex) { - this.regex = token.regex; - } - this.finish(); - return this; - }, - - finishMemberExpression: function (accessor, object, property) { - this.type = Syntax.MemberExpression; - this.computed = accessor === '['; - this.object = object; - this.property = property; - this.finish(); - return this; - }, - - finishMetaProperty: function (meta, property) { - this.type = Syntax.MetaProperty; - this.meta = meta; - this.property = property; - this.finish(); - return this; - }, - - finishNewExpression: function (callee, args) { - this.type = Syntax.NewExpression; - this.callee = callee; - this.arguments = args; - this.finish(); - return this; - }, - - finishObjectExpression: function (properties) { - this.type = Syntax.ObjectExpression; - this.properties = properties; - this.finish(); - return this; - }, - - finishObjectPattern: function (properties) { - this.type = Syntax.ObjectPattern; - this.properties = properties; - this.finish(); - return this; - }, - - finishPostfixExpression: function (operator, argument) { - this.type = Syntax.UpdateExpression; - this.operator = operator; - this.argument = argument; - this.prefix = false; - this.finish(); - return this; - }, - - finishProgram: function (body, sourceType) { - this.type = Syntax.Program; - this.body = body; - this.sourceType = sourceType; - this.finish(); - return this; - }, - - finishProperty: function (kind, key, computed, value, method, shorthand) { - this.type = Syntax.Property; - this.key = key; - this.computed = computed; - this.value = value; - this.kind = kind; - this.method = method; - this.shorthand = shorthand; - this.finish(); - return this; - }, - - finishRestElement: function (argument) { - this.type = Syntax.RestElement; - this.argument = argument; - this.finish(); - return this; - }, - - finishReturnStatement: function (argument) { - this.type = Syntax.ReturnStatement; - this.argument = argument; - this.finish(); - return this; - }, - - finishSequenceExpression: function (expressions) { - this.type = Syntax.SequenceExpression; - this.expressions = expressions; - this.finish(); - return this; - }, - - finishSpreadElement: function (argument) { - this.type = Syntax.SpreadElement; - this.argument = argument; - this.finish(); - return this; - }, - - finishSwitchCase: function (test, consequent) { - this.type = Syntax.SwitchCase; - this.test = test; - this.consequent = consequent; - this.finish(); - return this; - }, - - finishSuper: function () { - this.type = Syntax.Super; - this.finish(); - return this; - }, - - finishSwitchStatement: function (discriminant, cases) { - this.type = Syntax.SwitchStatement; - this.discriminant = discriminant; - this.cases = cases; - this.finish(); - return this; - }, - - finishTaggedTemplateExpression: function (tag, quasi) { - this.type = Syntax.TaggedTemplateExpression; - this.tag = tag; - this.quasi = quasi; - this.finish(); - return this; - }, - - finishTemplateElement: function (value, tail) { - this.type = Syntax.TemplateElement; - this.value = value; - this.tail = tail; - this.finish(); - return this; - }, - - finishTemplateLiteral: function (quasis, expressions) { - this.type = Syntax.TemplateLiteral; - this.quasis = quasis; - this.expressions = expressions; - this.finish(); - return this; - }, - - finishThisExpression: function () { - this.type = Syntax.ThisExpression; - this.finish(); - return this; - }, - - finishThrowStatement: function (argument) { - this.type = Syntax.ThrowStatement; - this.argument = argument; - this.finish(); - return this; - }, - - finishTryStatement: function (block, handler, finalizer) { - this.type = Syntax.TryStatement; - this.block = block; - this.guardedHandlers = []; - this.handlers = handler ? [handler] : []; - this.handler = handler; - this.finalizer = finalizer; - this.finish(); - return this; - }, - - finishUnaryExpression: function (operator, argument) { - this.type = (operator === '++' || operator === '--') ? Syntax.UpdateExpression : Syntax.UnaryExpression; - this.operator = operator; - this.argument = argument; - this.prefix = true; - this.finish(); - return this; - }, - - finishVariableDeclaration: function (declarations) { - this.type = Syntax.VariableDeclaration; - this.declarations = declarations; - this.kind = 'var'; - this.finish(); - return this; - }, - - finishLexicalDeclaration: function (declarations, kind) { - this.type = Syntax.VariableDeclaration; - this.declarations = declarations; - this.kind = kind; - this.finish(); - return this; - }, - - finishVariableDeclarator: function (id, init) { - this.type = Syntax.VariableDeclarator; - this.id = id; - this.init = init; - this.finish(); - return this; - }, - - finishWhileStatement: function (test, body) { - this.type = Syntax.WhileStatement; - this.test = test; - this.body = body; - this.finish(); - return this; - }, - - finishWithStatement: function (object, body) { - this.type = Syntax.WithStatement; - this.object = object; - this.body = body; - this.finish(); - return this; - }, - - finishExportSpecifier: function (local, exported) { - this.type = Syntax.ExportSpecifier; - this.exported = exported || local; - this.local = local; - this.finish(); - return this; - }, - - finishImportDefaultSpecifier: function (local) { - this.type = Syntax.ImportDefaultSpecifier; - this.local = local; - this.finish(); - return this; - }, - - finishImportNamespaceSpecifier: function (local) { - this.type = Syntax.ImportNamespaceSpecifier; - this.local = local; - this.finish(); - return this; - }, - - finishExportNamedDeclaration: function (declaration, specifiers, src) { - this.type = Syntax.ExportNamedDeclaration; - this.declaration = declaration; - this.specifiers = specifiers; - this.source = src; - this.finish(); - return this; - }, - - finishExportDefaultDeclaration: function (declaration) { - this.type = Syntax.ExportDefaultDeclaration; - this.declaration = declaration; - this.finish(); - return this; - }, - - finishExportAllDeclaration: function (src) { - this.type = Syntax.ExportAllDeclaration; - this.source = src; - this.finish(); - return this; - }, - - finishImportSpecifier: function (local, imported) { - this.type = Syntax.ImportSpecifier; - this.local = local || imported; - this.imported = imported; - this.finish(); - return this; - }, - - finishImportDeclaration: function (specifiers, src) { - this.type = Syntax.ImportDeclaration; - this.specifiers = specifiers; - this.source = src; - this.finish(); - return this; - }, - - finishYieldExpression: function (argument, delegate) { - this.type = Syntax.YieldExpression; - this.argument = argument; - this.delegate = delegate; - this.finish(); - return this; - } - }; - - - function recordError(error) { - var e, existing; - - for (e = 0; e < extra.errors.length; e++) { - existing = extra.errors[e]; - // Prevent duplicated error. - /* istanbul ignore next */ - if (existing.index === error.index && existing.message === error.message) { - return; - } - } - - extra.errors.push(error); - } - - function constructError(msg, column) { - var error = new Error(msg); - try { - throw error; - } catch (base) { - /* istanbul ignore else */ - if (Object.create && Object.defineProperty) { - error = Object.create(base); - Object.defineProperty(error, 'column', { value: column }); - } - } finally { - return error; - } - } - - function createError(line, pos, description) { - var msg, column, error; - - msg = 'Line ' + line + ': ' + description; - column = pos - (scanning ? lineStart : lastLineStart) + 1; - error = constructError(msg, column); - error.lineNumber = line; - error.description = description; - error.index = pos; - return error; - } - - // Throw an exception - - function throwError(messageFormat) { - var args, msg; - - args = Array.prototype.slice.call(arguments, 1); - msg = messageFormat.replace(/%(\d)/g, - function (whole, idx) { - assert(idx < args.length, 'Message reference must be in range'); - return args[idx]; - } - ); - - throw createError(lastLineNumber, lastIndex, msg); - } - - function tolerateError(messageFormat) { - var args, msg, error; - - args = Array.prototype.slice.call(arguments, 1); - /* istanbul ignore next */ - msg = messageFormat.replace(/%(\d)/g, - function (whole, idx) { - assert(idx < args.length, 'Message reference must be in range'); - return args[idx]; - } - ); - - error = createError(lineNumber, lastIndex, msg); - if (extra.errors) { - recordError(error); - } else { - throw error; - } - } - - // Throw an exception because of the token. - - function unexpectedTokenError(token, message) { - var value, msg = message || Messages.UnexpectedToken; - - if (token) { - if (!message) { - msg = (token.type === Token.EOF) ? Messages.UnexpectedEOS : - (token.type === Token.Identifier) ? Messages.UnexpectedIdentifier : - (token.type === Token.NumericLiteral) ? Messages.UnexpectedNumber : - (token.type === Token.StringLiteral) ? Messages.UnexpectedString : - (token.type === Token.Template) ? Messages.UnexpectedTemplate : - Messages.UnexpectedToken; - - if (token.type === Token.Keyword) { - if (isFutureReservedWord(token.value)) { - msg = Messages.UnexpectedReserved; - } else if (strict && isStrictModeReservedWord(token.value)) { - msg = Messages.StrictReservedWord; - } - } - } - - value = (token.type === Token.Template) ? token.value.raw : token.value; - } else { - value = 'ILLEGAL'; - } - - msg = msg.replace('%0', value); - - return (token && typeof token.lineNumber === 'number') ? - createError(token.lineNumber, token.start, msg) : - createError(scanning ? lineNumber : lastLineNumber, scanning ? index : lastIndex, msg); - } - - function throwUnexpectedToken(token, message) { - throw unexpectedTokenError(token, message); - } - - function tolerateUnexpectedToken(token, message) { - var error = unexpectedTokenError(token, message); - if (extra.errors) { - recordError(error); - } else { - throw error; - } - } - - // Expect the next token to match the specified punctuator. - // If not, an exception will be thrown. - - function expect(value) { - var token = lex(); - if (token.type !== Token.Punctuator || token.value !== value) { - throwUnexpectedToken(token); - } - } - - /** - * @name expectCommaSeparator - * @description Quietly expect a comma when in tolerant mode, otherwise delegates - * to expect(value) - * @since 2.0 - */ - function expectCommaSeparator() { - var token; - - if (extra.errors) { - token = lookahead; - if (token.type === Token.Punctuator && token.value === ',') { - lex(); - } else if (token.type === Token.Punctuator && token.value === ';') { - lex(); - tolerateUnexpectedToken(token); - } else { - tolerateUnexpectedToken(token, Messages.UnexpectedToken); - } - } else { - expect(','); - } - } - - // Expect the next token to match the specified keyword. - // If not, an exception will be thrown. - - function expectKeyword(keyword) { - var token = lex(); - if (token.type !== Token.Keyword || token.value !== keyword) { - throwUnexpectedToken(token); - } - } - - // Return true if the next token matches the specified punctuator. - - function match(value) { - return lookahead.type === Token.Punctuator && lookahead.value === value; - } - - // Return true if the next token matches the specified keyword - - function matchKeyword(keyword) { - return lookahead.type === Token.Keyword && lookahead.value === keyword; - } - - // Return true if the next token matches the specified contextual keyword - // (where an identifier is sometimes a keyword depending on the context) - - function matchContextualKeyword(keyword) { - return lookahead.type === Token.Identifier && lookahead.value === keyword; - } - - // Return true if the next token is an assignment operator - - function matchAssign() { - var op; - - if (lookahead.type !== Token.Punctuator) { - return false; - } - op = lookahead.value; - return op === '=' || - op === '*=' || - op === '/=' || - op === '%=' || - op === '+=' || - op === '-=' || - op === '<<=' || - op === '>>=' || - op === '>>>=' || - op === '&=' || - op === '^=' || - op === '|='; - } - - function consumeSemicolon() { - // Catch the very common case first: immediately a semicolon (U+003B). - if (source.charCodeAt(startIndex) === 0x3B || match(';')) { - lex(); - return; - } - - if (hasLineTerminator) { - return; - } - - // FIXME(ikarienator): this is seemingly an issue in the previous location info convention. - lastIndex = startIndex; - lastLineNumber = startLineNumber; - lastLineStart = startLineStart; - - if (lookahead.type !== Token.EOF && !match('}')) { - throwUnexpectedToken(lookahead); - } - } - - // Cover grammar support. - // - // When an assignment expression position starts with an left parenthesis, the determination of the type - // of the syntax is to be deferred arbitrarily long until the end of the parentheses pair (plus a lookahead) - // or the first comma. This situation also defers the determination of all the expressions nested in the pair. - // - // There are three productions that can be parsed in a parentheses pair that needs to be determined - // after the outermost pair is closed. They are: - // - // 1. AssignmentExpression - // 2. BindingElements - // 3. AssignmentTargets - // - // In order to avoid exponential backtracking, we use two flags to denote if the production can be - // binding element or assignment target. - // - // The three productions have the relationship: - // - // BindingElements ⊆ AssignmentTargets ⊆ AssignmentExpression - // - // with a single exception that CoverInitializedName when used directly in an Expression, generates - // an early error. Therefore, we need the third state, firstCoverInitializedNameError, to track the - // first usage of CoverInitializedName and report it when we reached the end of the parentheses pair. - // - // isolateCoverGrammar function runs the given parser function with a new cover grammar context, and it does not - // effect the current flags. This means the production the parser parses is only used as an expression. Therefore - // the CoverInitializedName check is conducted. - // - // inheritCoverGrammar function runs the given parse function with a new cover grammar context, and it propagates - // the flags outside of the parser. This means the production the parser parses is used as a part of a potential - // pattern. The CoverInitializedName check is deferred. - function isolateCoverGrammar(parser) { - var oldIsBindingElement = isBindingElement, - oldIsAssignmentTarget = isAssignmentTarget, - oldFirstCoverInitializedNameError = firstCoverInitializedNameError, - result; - isBindingElement = true; - isAssignmentTarget = true; - firstCoverInitializedNameError = null; - result = parser(); - if (firstCoverInitializedNameError !== null) { - throwUnexpectedToken(firstCoverInitializedNameError); - } - isBindingElement = oldIsBindingElement; - isAssignmentTarget = oldIsAssignmentTarget; - firstCoverInitializedNameError = oldFirstCoverInitializedNameError; - return result; - } - - function inheritCoverGrammar(parser) { - var oldIsBindingElement = isBindingElement, - oldIsAssignmentTarget = isAssignmentTarget, - oldFirstCoverInitializedNameError = firstCoverInitializedNameError, - result; - isBindingElement = true; - isAssignmentTarget = true; - firstCoverInitializedNameError = null; - result = parser(); - isBindingElement = isBindingElement && oldIsBindingElement; - isAssignmentTarget = isAssignmentTarget && oldIsAssignmentTarget; - firstCoverInitializedNameError = oldFirstCoverInitializedNameError || firstCoverInitializedNameError; - return result; - } - - // ECMA-262 13.3.3 Destructuring Binding Patterns - - function parseArrayPattern(params, kind) { - var node = new Node(), elements = [], rest, restNode; - expect('['); - - while (!match(']')) { - if (match(',')) { - lex(); - elements.push(null); - } else { - if (match('...')) { - restNode = new Node(); - lex(); - params.push(lookahead); - rest = parseVariableIdentifier(params, kind); - elements.push(restNode.finishRestElement(rest)); - break; - } else { - elements.push(parsePatternWithDefault(params, kind)); - } - if (!match(']')) { - expect(','); - } - } - - } - - expect(']'); - - return node.finishArrayPattern(elements); - } - - function parsePropertyPattern(params, kind) { - var node = new Node(), key, keyToken, computed = match('['), init; - if (lookahead.type === Token.Identifier) { - keyToken = lookahead; - key = parseVariableIdentifier(); - if (match('=')) { - params.push(keyToken); - lex(); - init = parseAssignmentExpression(); - - return node.finishProperty( - 'init', key, false, - new WrappingNode(keyToken).finishAssignmentPattern(key, init), false, false); - } else if (!match(':')) { - params.push(keyToken); - return node.finishProperty('init', key, false, key, false, true); - } - } else { - key = parseObjectPropertyKey(params, kind); - } - expect(':'); - init = parsePatternWithDefault(params, kind); - return node.finishProperty('init', key, computed, init, false, false); - } - - function parseObjectPattern(params, kind) { - var node = new Node(), properties = []; - - expect('{'); - - while (!match('}')) { - properties.push(parsePropertyPattern(params, kind)); - if (!match('}')) { - expect(','); - } - } - - lex(); - - return node.finishObjectPattern(properties); - } - - function parsePattern(params, kind) { - if (match('[')) { - return parseArrayPattern(params, kind); - } else if (match('{')) { - return parseObjectPattern(params, kind); - } - params.push(lookahead); - return parseVariableIdentifier(kind); - } - - function parsePatternWithDefault(params, kind) { - var startToken = lookahead, pattern, previousAllowYield, right; - pattern = parsePattern(params, kind); - if (match('=')) { - lex(); - previousAllowYield = state.allowYield; - state.allowYield = true; - right = isolateCoverGrammar(parseAssignmentExpression); - state.allowYield = previousAllowYield; - pattern = new WrappingNode(startToken).finishAssignmentPattern(pattern, right); - } - return pattern; - } - - // ECMA-262 12.2.5 Array Initializer - - function parseArrayInitializer() { - var elements = [], node = new Node(), restSpread; - - expect('['); - - while (!match(']')) { - if (match(',')) { - lex(); - elements.push(null); - } else if (match('...')) { - restSpread = new Node(); - lex(); - restSpread.finishSpreadElement(inheritCoverGrammar(parseAssignmentExpression)); - - if (!match(']')) { - isAssignmentTarget = isBindingElement = false; - expect(','); - } - elements.push(restSpread); - } else { - elements.push(inheritCoverGrammar(parseAssignmentExpression)); - - if (!match(']')) { - expect(','); - } - } - } - - lex(); - - return node.finishArrayExpression(elements); - } - - // ECMA-262 12.2.6 Object Initializer - - function parsePropertyFunction(node, paramInfo, isGenerator) { - var previousStrict, body; - - isAssignmentTarget = isBindingElement = false; - - previousStrict = strict; - body = isolateCoverGrammar(parseFunctionSourceElements); - - if (strict && paramInfo.firstRestricted) { - tolerateUnexpectedToken(paramInfo.firstRestricted, paramInfo.message); - } - if (strict && paramInfo.stricted) { - tolerateUnexpectedToken(paramInfo.stricted, paramInfo.message); - } - - strict = previousStrict; - return node.finishFunctionExpression(null, paramInfo.params, paramInfo.defaults, body, isGenerator); - } - - function parsePropertyMethodFunction() { - var params, method, node = new Node(), - previousAllowYield = state.allowYield; - - state.allowYield = false; - params = parseParams(); - state.allowYield = previousAllowYield; - - state.allowYield = false; - method = parsePropertyFunction(node, params, false); - state.allowYield = previousAllowYield; - - return method; - } - - function parseObjectPropertyKey() { - var token, node = new Node(), expr; - - token = lex(); - - // Note: This function is called only from parseObjectProperty(), where - // EOF and Punctuator tokens are already filtered out. - - switch (token.type) { - case Token.StringLiteral: - case Token.NumericLiteral: - if (strict && token.octal) { - tolerateUnexpectedToken(token, Messages.StrictOctalLiteral); - } - return node.finishLiteral(token); - case Token.Identifier: - case Token.BooleanLiteral: - case Token.NullLiteral: - case Token.Keyword: - return node.finishIdentifier(token.value); - case Token.Punctuator: - if (token.value === '[') { - expr = isolateCoverGrammar(parseAssignmentExpression); - expect(']'); - return expr; - } - break; - } - throwUnexpectedToken(token); - } - - function lookaheadPropertyName() { - switch (lookahead.type) { - case Token.Identifier: - case Token.StringLiteral: - case Token.BooleanLiteral: - case Token.NullLiteral: - case Token.NumericLiteral: - case Token.Keyword: - return true; - case Token.Punctuator: - return lookahead.value === '['; - } - return false; - } - - // This function is to try to parse a MethodDefinition as defined in 14.3. But in the case of object literals, - // it might be called at a position where there is in fact a short hand identifier pattern or a data property. - // This can only be determined after we consumed up to the left parentheses. - // - // In order to avoid back tracking, it returns `null` if the position is not a MethodDefinition and the caller - // is responsible to visit other options. - function tryParseMethodDefinition(token, key, computed, node) { - var value, options, methodNode, params, - previousAllowYield = state.allowYield; - - if (token.type === Token.Identifier) { - // check for `get` and `set`; - - if (token.value === 'get' && lookaheadPropertyName()) { - computed = match('['); - key = parseObjectPropertyKey(); - methodNode = new Node(); - expect('('); - expect(')'); - - state.allowYield = false; - value = parsePropertyFunction(methodNode, { - params: [], - defaults: [], - stricted: null, - firstRestricted: null, - message: null - }, false); - state.allowYield = previousAllowYield; - - return node.finishProperty('get', key, computed, value, false, false); - } else if (token.value === 'set' && lookaheadPropertyName()) { - computed = match('['); - key = parseObjectPropertyKey(); - methodNode = new Node(); - expect('('); - - options = { - params: [], - defaultCount: 0, - defaults: [], - firstRestricted: null, - paramSet: {} - }; - if (match(')')) { - tolerateUnexpectedToken(lookahead); - } else { - state.allowYield = false; - parseParam(options); - state.allowYield = previousAllowYield; - if (options.defaultCount === 0) { - options.defaults = []; - } - } - expect(')'); - - state.allowYield = false; - value = parsePropertyFunction(methodNode, options, false); - state.allowYield = previousAllowYield; - - return node.finishProperty('set', key, computed, value, false, false); - } - } else if (token.type === Token.Punctuator && token.value === '*' && lookaheadPropertyName()) { - computed = match('['); - key = parseObjectPropertyKey(); - methodNode = new Node(); - - state.allowYield = true; - params = parseParams(); - state.allowYield = previousAllowYield; - - state.allowYield = false; - value = parsePropertyFunction(methodNode, params, true); - state.allowYield = previousAllowYield; - - return node.finishProperty('init', key, computed, value, true, false); - } - - if (key && match('(')) { - value = parsePropertyMethodFunction(); - return node.finishProperty('init', key, computed, value, true, false); - } - - // Not a MethodDefinition. - return null; - } - - function parseObjectProperty(hasProto) { - var token = lookahead, node = new Node(), computed, key, maybeMethod, proto, value; - - computed = match('['); - if (match('*')) { - lex(); - } else { - key = parseObjectPropertyKey(); - } - maybeMethod = tryParseMethodDefinition(token, key, computed, node); - if (maybeMethod) { - return maybeMethod; - } - - if (!key) { - throwUnexpectedToken(lookahead); - } - - // Check for duplicated __proto__ - if (!computed) { - proto = (key.type === Syntax.Identifier && key.name === '__proto__') || - (key.type === Syntax.Literal && key.value === '__proto__'); - if (hasProto.value && proto) { - tolerateError(Messages.DuplicateProtoProperty); - } - hasProto.value |= proto; - } - - if (match(':')) { - lex(); - value = inheritCoverGrammar(parseAssignmentExpression); - return node.finishProperty('init', key, computed, value, false, false); - } - - if (token.type === Token.Identifier) { - if (match('=')) { - firstCoverInitializedNameError = lookahead; - lex(); - value = isolateCoverGrammar(parseAssignmentExpression); - return node.finishProperty('init', key, computed, - new WrappingNode(token).finishAssignmentPattern(key, value), false, true); - } - return node.finishProperty('init', key, computed, key, false, true); - } - - throwUnexpectedToken(lookahead); - } - - function parseObjectInitializer() { - var properties = [], hasProto = {value: false}, node = new Node(); - - expect('{'); - - while (!match('}')) { - properties.push(parseObjectProperty(hasProto)); - - if (!match('}')) { - expectCommaSeparator(); - } - } - - expect('}'); - - return node.finishObjectExpression(properties); - } - - function reinterpretExpressionAsPattern(expr) { - var i; - switch (expr.type) { - case Syntax.Identifier: - case Syntax.MemberExpression: - case Syntax.RestElement: - case Syntax.AssignmentPattern: - break; - case Syntax.SpreadElement: - expr.type = Syntax.RestElement; - reinterpretExpressionAsPattern(expr.argument); - break; - case Syntax.ArrayExpression: - expr.type = Syntax.ArrayPattern; - for (i = 0; i < expr.elements.length; i++) { - if (expr.elements[i] !== null) { - reinterpretExpressionAsPattern(expr.elements[i]); - } - } - break; - case Syntax.ObjectExpression: - expr.type = Syntax.ObjectPattern; - for (i = 0; i < expr.properties.length; i++) { - reinterpretExpressionAsPattern(expr.properties[i].value); - } - break; - case Syntax.AssignmentExpression: - expr.type = Syntax.AssignmentPattern; - reinterpretExpressionAsPattern(expr.left); - break; - default: - // Allow other node type for tolerant parsing. - break; - } - } - - // ECMA-262 12.2.9 Template Literals - - function parseTemplateElement(option) { - var node, token; - - if (lookahead.type !== Token.Template || (option.head && !lookahead.head)) { - throwUnexpectedToken(); - } - - node = new Node(); - token = lex(); - - return node.finishTemplateElement({ raw: token.value.raw, cooked: token.value.cooked }, token.tail); - } - - function parseTemplateLiteral() { - var quasi, quasis, expressions, node = new Node(); - - quasi = parseTemplateElement({ head: true }); - quasis = [quasi]; - expressions = []; - - while (!quasi.tail) { - expressions.push(parseExpression()); - quasi = parseTemplateElement({ head: false }); - quasis.push(quasi); - } - - return node.finishTemplateLiteral(quasis, expressions); - } - - // ECMA-262 12.2.10 The Grouping Operator - - function parseGroupExpression() { - var expr, expressions, startToken, i, params = []; - - expect('('); - - if (match(')')) { - lex(); - if (!match('=>')) { - expect('=>'); - } - return { - type: PlaceHolders.ArrowParameterPlaceHolder, - params: [], - rawParams: [] - }; - } - - startToken = lookahead; - if (match('...')) { - expr = parseRestElement(params); - expect(')'); - if (!match('=>')) { - expect('=>'); - } - return { - type: PlaceHolders.ArrowParameterPlaceHolder, - params: [expr] - }; - } - - isBindingElement = true; - expr = inheritCoverGrammar(parseAssignmentExpression); - - if (match(',')) { - isAssignmentTarget = false; - expressions = [expr]; - - while (startIndex < length) { - if (!match(',')) { - break; - } - lex(); - - if (match('...')) { - if (!isBindingElement) { - throwUnexpectedToken(lookahead); - } - expressions.push(parseRestElement(params)); - expect(')'); - if (!match('=>')) { - expect('=>'); - } - isBindingElement = false; - for (i = 0; i < expressions.length; i++) { - reinterpretExpressionAsPattern(expressions[i]); - } - return { - type: PlaceHolders.ArrowParameterPlaceHolder, - params: expressions - }; - } - - expressions.push(inheritCoverGrammar(parseAssignmentExpression)); - } - - expr = new WrappingNode(startToken).finishSequenceExpression(expressions); - } - - - expect(')'); - - if (match('=>')) { - if (expr.type === Syntax.Identifier && expr.name === 'yield') { - return { - type: PlaceHolders.ArrowParameterPlaceHolder, - params: [expr] - }; - } - - if (!isBindingElement) { - throwUnexpectedToken(lookahead); - } - - if (expr.type === Syntax.SequenceExpression) { - for (i = 0; i < expr.expressions.length; i++) { - reinterpretExpressionAsPattern(expr.expressions[i]); - } - } else { - reinterpretExpressionAsPattern(expr); - } - - expr = { - type: PlaceHolders.ArrowParameterPlaceHolder, - params: expr.type === Syntax.SequenceExpression ? expr.expressions : [expr] - }; - } - isBindingElement = false; - return expr; - } - - - // ECMA-262 12.2 Primary Expressions - - function parsePrimaryExpression() { - var type, token, expr, node; - - if (match('(')) { - isBindingElement = false; - return inheritCoverGrammar(parseGroupExpression); - } - - if (match('[')) { - return inheritCoverGrammar(parseArrayInitializer); - } - - if (match('{')) { - return inheritCoverGrammar(parseObjectInitializer); - } - - type = lookahead.type; - node = new Node(); - - if (type === Token.Identifier) { - if (state.sourceType === 'module' && lookahead.value === 'await') { - tolerateUnexpectedToken(lookahead); - } - expr = node.finishIdentifier(lex().value); - } else if (type === Token.StringLiteral || type === Token.NumericLiteral) { - isAssignmentTarget = isBindingElement = false; - if (strict && lookahead.octal) { - tolerateUnexpectedToken(lookahead, Messages.StrictOctalLiteral); - } - expr = node.finishLiteral(lex()); - } else if (type === Token.Keyword) { - if (!strict && state.allowYield && matchKeyword('yield')) { - return parseNonComputedProperty(); - } - isAssignmentTarget = isBindingElement = false; - if (matchKeyword('function')) { - return parseFunctionExpression(); - } - if (matchKeyword('this')) { - lex(); - return node.finishThisExpression(); - } - if (matchKeyword('class')) { - return parseClassExpression(); - } - throwUnexpectedToken(lex()); - } else if (type === Token.BooleanLiteral) { - isAssignmentTarget = isBindingElement = false; - token = lex(); - token.value = (token.value === 'true'); - expr = node.finishLiteral(token); - } else if (type === Token.NullLiteral) { - isAssignmentTarget = isBindingElement = false; - token = lex(); - token.value = null; - expr = node.finishLiteral(token); - } else if (match('/') || match('/=')) { - isAssignmentTarget = isBindingElement = false; - index = startIndex; - - if (typeof extra.tokens !== 'undefined') { - token = collectRegex(); - } else { - token = scanRegExp(); - } - lex(); - expr = node.finishLiteral(token); - } else if (type === Token.Template) { - expr = parseTemplateLiteral(); - } else { - throwUnexpectedToken(lex()); - } - - return expr; - } - - // ECMA-262 12.3 Left-Hand-Side Expressions - - function parseArguments() { - var args = [], expr; - - expect('('); - - if (!match(')')) { - while (startIndex < length) { - if (match('...')) { - expr = new Node(); - lex(); - expr.finishSpreadElement(isolateCoverGrammar(parseAssignmentExpression)); - } else { - expr = isolateCoverGrammar(parseAssignmentExpression); - } - args.push(expr); - if (match(')')) { - break; - } - expectCommaSeparator(); - } - } - - expect(')'); - - return args; - } - - function parseNonComputedProperty() { - var token, node = new Node(); - - token = lex(); - - if (!isIdentifierName(token)) { - throwUnexpectedToken(token); - } - - return node.finishIdentifier(token.value); - } - - function parseNonComputedMember() { - expect('.'); - - return parseNonComputedProperty(); - } - - function parseComputedMember() { - var expr; - - expect('['); - - expr = isolateCoverGrammar(parseExpression); - - expect(']'); - - return expr; - } - - // ECMA-262 12.3.3 The new Operator - - function parseNewExpression() { - var callee, args, node = new Node(); - - expectKeyword('new'); - - if (match('.')) { - lex(); - if (lookahead.type === Token.Identifier && lookahead.value === 'target') { - if (state.inFunctionBody) { - lex(); - return node.finishMetaProperty('new', 'target'); - } - } - throwUnexpectedToken(lookahead); - } - - callee = isolateCoverGrammar(parseLeftHandSideExpression); - args = match('(') ? parseArguments() : []; - - isAssignmentTarget = isBindingElement = false; - - return node.finishNewExpression(callee, args); - } - - // ECMA-262 12.3.4 Function Calls - - function parseLeftHandSideExpressionAllowCall() { - var quasi, expr, args, property, startToken, previousAllowIn = state.allowIn; - - startToken = lookahead; - state.allowIn = true; - - if (matchKeyword('super') && state.inFunctionBody) { - expr = new Node(); - lex(); - expr = expr.finishSuper(); - if (!match('(') && !match('.') && !match('[')) { - throwUnexpectedToken(lookahead); - } - } else { - expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression); - } - - for (;;) { - if (match('.')) { - isBindingElement = false; - isAssignmentTarget = true; - property = parseNonComputedMember(); - expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property); - } else if (match('(')) { - isBindingElement = false; - isAssignmentTarget = false; - args = parseArguments(); - expr = new WrappingNode(startToken).finishCallExpression(expr, args); - } else if (match('[')) { - isBindingElement = false; - isAssignmentTarget = true; - property = parseComputedMember(); - expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property); - } else if (lookahead.type === Token.Template && lookahead.head) { - quasi = parseTemplateLiteral(); - expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi); - } else { - break; - } - } - state.allowIn = previousAllowIn; - - return expr; - } - - // ECMA-262 12.3 Left-Hand-Side Expressions - - function parseLeftHandSideExpression() { - var quasi, expr, property, startToken; - assert(state.allowIn, 'callee of new expression always allow in keyword.'); - - startToken = lookahead; - - if (matchKeyword('super') && state.inFunctionBody) { - expr = new Node(); - lex(); - expr = expr.finishSuper(); - if (!match('[') && !match('.')) { - throwUnexpectedToken(lookahead); - } - } else { - expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression); - } - - for (;;) { - if (match('[')) { - isBindingElement = false; - isAssignmentTarget = true; - property = parseComputedMember(); - expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property); - } else if (match('.')) { - isBindingElement = false; - isAssignmentTarget = true; - property = parseNonComputedMember(); - expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property); - } else if (lookahead.type === Token.Template && lookahead.head) { - quasi = parseTemplateLiteral(); - expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi); - } else { - break; - } - } - return expr; - } - - // ECMA-262 12.4 Postfix Expressions - - function parsePostfixExpression() { - var expr, token, startToken = lookahead; - - expr = inheritCoverGrammar(parseLeftHandSideExpressionAllowCall); - - if (!hasLineTerminator && lookahead.type === Token.Punctuator) { - if (match('++') || match('--')) { - // ECMA-262 11.3.1, 11.3.2 - if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) { - tolerateError(Messages.StrictLHSPostfix); - } - - if (!isAssignmentTarget) { - tolerateError(Messages.InvalidLHSInAssignment); - } - - isAssignmentTarget = isBindingElement = false; - - token = lex(); - expr = new WrappingNode(startToken).finishPostfixExpression(token.value, expr); - } - } - - return expr; - } - - // ECMA-262 12.5 Unary Operators - - function parseUnaryExpression() { - var token, expr, startToken; - - if (lookahead.type !== Token.Punctuator && lookahead.type !== Token.Keyword) { - expr = parsePostfixExpression(); - } else if (match('++') || match('--')) { - startToken = lookahead; - token = lex(); - expr = inheritCoverGrammar(parseUnaryExpression); - // ECMA-262 11.4.4, 11.4.5 - if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) { - tolerateError(Messages.StrictLHSPrefix); - } - - if (!isAssignmentTarget) { - tolerateError(Messages.InvalidLHSInAssignment); - } - expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr); - isAssignmentTarget = isBindingElement = false; - } else if (match('+') || match('-') || match('~') || match('!')) { - startToken = lookahead; - token = lex(); - expr = inheritCoverGrammar(parseUnaryExpression); - expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr); - isAssignmentTarget = isBindingElement = false; - } else if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) { - startToken = lookahead; - token = lex(); - expr = inheritCoverGrammar(parseUnaryExpression); - expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr); - if (strict && expr.operator === 'delete' && expr.argument.type === Syntax.Identifier) { - tolerateError(Messages.StrictDelete); - } - isAssignmentTarget = isBindingElement = false; - } else { - expr = parsePostfixExpression(); - } - - return expr; - } - - function binaryPrecedence(token, allowIn) { - var prec = 0; - - if (token.type !== Token.Punctuator && token.type !== Token.Keyword) { - return 0; - } - - switch (token.value) { - case '||': - prec = 1; - break; - - case '&&': - prec = 2; - break; - - case '|': - prec = 3; - break; - - case '^': - prec = 4; - break; - - case '&': - prec = 5; - break; - - case '==': - case '!=': - case '===': - case '!==': - prec = 6; - break; - - case '<': - case '>': - case '<=': - case '>=': - case 'instanceof': - prec = 7; - break; - - case 'in': - prec = allowIn ? 7 : 0; - break; - - case '<<': - case '>>': - case '>>>': - prec = 8; - break; - - case '+': - case '-': - prec = 9; - break; - - case '*': - case '/': - case '%': - prec = 11; - break; - - default: - break; - } - - return prec; - } - - // ECMA-262 12.6 Multiplicative Operators - // ECMA-262 12.7 Additive Operators - // ECMA-262 12.8 Bitwise Shift Operators - // ECMA-262 12.9 Relational Operators - // ECMA-262 12.10 Equality Operators - // ECMA-262 12.11 Binary Bitwise Operators - // ECMA-262 12.12 Binary Logical Operators - - function parseBinaryExpression() { - var marker, markers, expr, token, prec, stack, right, operator, left, i; - - marker = lookahead; - left = inheritCoverGrammar(parseUnaryExpression); - - token = lookahead; - prec = binaryPrecedence(token, state.allowIn); - if (prec === 0) { - return left; - } - isAssignmentTarget = isBindingElement = false; - token.prec = prec; - lex(); - - markers = [marker, lookahead]; - right = isolateCoverGrammar(parseUnaryExpression); - - stack = [left, token, right]; - - while ((prec = binaryPrecedence(lookahead, state.allowIn)) > 0) { - - // Reduce: make a binary expression from the three topmost entries. - while ((stack.length > 2) && (prec <= stack[stack.length - 2].prec)) { - right = stack.pop(); - operator = stack.pop().value; - left = stack.pop(); - markers.pop(); - expr = new WrappingNode(markers[markers.length - 1]).finishBinaryExpression(operator, left, right); - stack.push(expr); - } - - // Shift. - token = lex(); - token.prec = prec; - stack.push(token); - markers.push(lookahead); - expr = isolateCoverGrammar(parseUnaryExpression); - stack.push(expr); - } - - // Final reduce to clean-up the stack. - i = stack.length - 1; - expr = stack[i]; - markers.pop(); - while (i > 1) { - expr = new WrappingNode(markers.pop()).finishBinaryExpression(stack[i - 1].value, stack[i - 2], expr); - i -= 2; - } - - return expr; - } - - - // ECMA-262 12.13 Conditional Operator - - function parseConditionalExpression() { - var expr, previousAllowIn, consequent, alternate, startToken; - - startToken = lookahead; - - expr = inheritCoverGrammar(parseBinaryExpression); - if (match('?')) { - lex(); - previousAllowIn = state.allowIn; - state.allowIn = true; - consequent = isolateCoverGrammar(parseAssignmentExpression); - state.allowIn = previousAllowIn; - expect(':'); - alternate = isolateCoverGrammar(parseAssignmentExpression); - - expr = new WrappingNode(startToken).finishConditionalExpression(expr, consequent, alternate); - isAssignmentTarget = isBindingElement = false; - } - - return expr; - } - - // ECMA-262 14.2 Arrow Function Definitions - - function parseConciseBody() { - if (match('{')) { - return parseFunctionSourceElements(); - } - return isolateCoverGrammar(parseAssignmentExpression); - } - - function checkPatternParam(options, param) { - var i; - switch (param.type) { - case Syntax.Identifier: - validateParam(options, param, param.name); - break; - case Syntax.RestElement: - checkPatternParam(options, param.argument); - break; - case Syntax.AssignmentPattern: - checkPatternParam(options, param.left); - break; - case Syntax.ArrayPattern: - for (i = 0; i < param.elements.length; i++) { - if (param.elements[i] !== null) { - checkPatternParam(options, param.elements[i]); - } - } - break; - case Syntax.YieldExpression: - break; - default: - assert(param.type === Syntax.ObjectPattern, 'Invalid type'); - for (i = 0; i < param.properties.length; i++) { - checkPatternParam(options, param.properties[i].value); - } - break; - } - } - function reinterpretAsCoverFormalsList(expr) { - var i, len, param, params, defaults, defaultCount, options, token; - - defaults = []; - defaultCount = 0; - params = [expr]; - - switch (expr.type) { - case Syntax.Identifier: - break; - case PlaceHolders.ArrowParameterPlaceHolder: - params = expr.params; - break; - default: - return null; - } - - options = { - paramSet: {} - }; - - for (i = 0, len = params.length; i < len; i += 1) { - param = params[i]; - switch (param.type) { - case Syntax.AssignmentPattern: - params[i] = param.left; - if (param.right.type === Syntax.YieldExpression) { - if (param.right.argument) { - throwUnexpectedToken(lookahead); - } - param.right.type = Syntax.Identifier; - param.right.name = 'yield'; - delete param.right.argument; - delete param.right.delegate; - } - defaults.push(param.right); - ++defaultCount; - checkPatternParam(options, param.left); - break; - default: - checkPatternParam(options, param); - params[i] = param; - defaults.push(null); - break; - } - } - - if (strict || !state.allowYield) { - for (i = 0, len = params.length; i < len; i += 1) { - param = params[i]; - if (param.type === Syntax.YieldExpression) { - throwUnexpectedToken(lookahead); - } - } - } - - if (options.message === Messages.StrictParamDupe) { - token = strict ? options.stricted : options.firstRestricted; - throwUnexpectedToken(token, options.message); - } - - if (defaultCount === 0) { - defaults = []; - } - - return { - params: params, - defaults: defaults, - stricted: options.stricted, - firstRestricted: options.firstRestricted, - message: options.message - }; - } - - function parseArrowFunctionExpression(options, node) { - var previousStrict, previousAllowYield, body; - - if (hasLineTerminator) { - tolerateUnexpectedToken(lookahead); - } - expect('=>'); - - previousStrict = strict; - previousAllowYield = state.allowYield; - state.allowYield = true; - - body = parseConciseBody(); - - if (strict && options.firstRestricted) { - throwUnexpectedToken(options.firstRestricted, options.message); - } - if (strict && options.stricted) { - tolerateUnexpectedToken(options.stricted, options.message); - } - - strict = previousStrict; - state.allowYield = previousAllowYield; - - return node.finishArrowFunctionExpression(options.params, options.defaults, body, body.type !== Syntax.BlockStatement); - } - - // ECMA-262 14.4 Yield expression - - function parseYieldExpression() { - var argument, expr, delegate, previousAllowYield; - - argument = null; - expr = new Node(); - - expectKeyword('yield'); - - if (!hasLineTerminator) { - previousAllowYield = state.allowYield; - state.allowYield = false; - delegate = match('*'); - if (delegate) { - lex(); - argument = parseAssignmentExpression(); - } else { - if (!match(';') && !match('}') && !match(')') && lookahead.type !== Token.EOF) { - argument = parseAssignmentExpression(); - } - } - state.allowYield = previousAllowYield; - } - - return expr.finishYieldExpression(argument, delegate); - } - - // ECMA-262 12.14 Assignment Operators - - function parseAssignmentExpression() { - var token, expr, right, list, startToken; - - startToken = lookahead; - token = lookahead; - - if (!state.allowYield && matchKeyword('yield')) { - return parseYieldExpression(); - } - - expr = parseConditionalExpression(); - - if (expr.type === PlaceHolders.ArrowParameterPlaceHolder || match('=>')) { - isAssignmentTarget = isBindingElement = false; - list = reinterpretAsCoverFormalsList(expr); - - if (list) { - firstCoverInitializedNameError = null; - return parseArrowFunctionExpression(list, new WrappingNode(startToken)); - } - - return expr; - } - - if (matchAssign()) { - if (!isAssignmentTarget) { - tolerateError(Messages.InvalidLHSInAssignment); - } - - // ECMA-262 12.1.1 - if (strict && expr.type === Syntax.Identifier) { - if (isRestrictedWord(expr.name)) { - tolerateUnexpectedToken(token, Messages.StrictLHSAssignment); - } - if (isStrictModeReservedWord(expr.name)) { - tolerateUnexpectedToken(token, Messages.StrictReservedWord); - } - } - - if (!match('=')) { - isAssignmentTarget = isBindingElement = false; - } else { - reinterpretExpressionAsPattern(expr); - } - - token = lex(); - right = isolateCoverGrammar(parseAssignmentExpression); - expr = new WrappingNode(startToken).finishAssignmentExpression(token.value, expr, right); - firstCoverInitializedNameError = null; - } - - return expr; - } - - // ECMA-262 12.15 Comma Operator - - function parseExpression() { - var expr, startToken = lookahead, expressions; - - expr = isolateCoverGrammar(parseAssignmentExpression); - - if (match(',')) { - expressions = [expr]; - - while (startIndex < length) { - if (!match(',')) { - break; - } - lex(); - expressions.push(isolateCoverGrammar(parseAssignmentExpression)); - } - - expr = new WrappingNode(startToken).finishSequenceExpression(expressions); - } - - return expr; - } - - // ECMA-262 13.2 Block - - function parseStatementListItem() { - if (lookahead.type === Token.Keyword) { - switch (lookahead.value) { - case 'export': - if (state.sourceType !== 'module') { - tolerateUnexpectedToken(lookahead, Messages.IllegalExportDeclaration); - } - return parseExportDeclaration(); - case 'import': - if (state.sourceType !== 'module') { - tolerateUnexpectedToken(lookahead, Messages.IllegalImportDeclaration); - } - return parseImportDeclaration(); - case 'const': - case 'let': - return parseLexicalDeclaration({inFor: false}); - case 'function': - return parseFunctionDeclaration(new Node()); - case 'class': - return parseClassDeclaration(); - } - } - - return parseStatement(); - } - - function parseStatementList() { - var list = []; - while (startIndex < length) { - if (match('}')) { - break; - } - list.push(parseStatementListItem()); - } - - return list; - } - - function parseBlock() { - var block, node = new Node(); - - expect('{'); - - block = parseStatementList(); - - expect('}'); - - return node.finishBlockStatement(block); - } - - // ECMA-262 13.3.2 Variable Statement - - function parseVariableIdentifier(kind) { - var token, node = new Node(); - - token = lex(); - - if (token.type === Token.Keyword && token.value === 'yield') { - if (strict) { - tolerateUnexpectedToken(token, Messages.StrictReservedWord); - } if (!state.allowYield) { - throwUnexpectedToken(token); - } - } else if (token.type !== Token.Identifier) { - if (strict && token.type === Token.Keyword && isStrictModeReservedWord(token.value)) { - tolerateUnexpectedToken(token, Messages.StrictReservedWord); - } else { - if (strict || token.value !== 'let' || kind !== 'var') { - throwUnexpectedToken(token); - } - } - } else if (state.sourceType === 'module' && token.type === Token.Identifier && token.value === 'await') { - tolerateUnexpectedToken(token); - } - - return node.finishIdentifier(token.value); - } - - function parseVariableDeclaration() { - var init = null, id, node = new Node(), params = []; - - id = parsePattern(params, 'var'); - - // ECMA-262 12.2.1 - if (strict && isRestrictedWord(id.name)) { - tolerateError(Messages.StrictVarName); - } - - if (match('=')) { - lex(); - init = isolateCoverGrammar(parseAssignmentExpression); - } else if (id.type !== Syntax.Identifier) { - expect('='); - } - - return node.finishVariableDeclarator(id, init); - } - - function parseVariableDeclarationList() { - var list = []; - - do { - list.push(parseVariableDeclaration()); - if (!match(',')) { - break; - } - lex(); - } while (startIndex < length); - - return list; - } - - function parseVariableStatement(node) { - var declarations; - - expectKeyword('var'); - - declarations = parseVariableDeclarationList(); - - consumeSemicolon(); - - return node.finishVariableDeclaration(declarations); - } - - // ECMA-262 13.3.1 Let and Const Declarations - - function parseLexicalBinding(kind, options) { - var init = null, id, node = new Node(), params = []; - - id = parsePattern(params, kind); - - // ECMA-262 12.2.1 - if (strict && id.type === Syntax.Identifier && isRestrictedWord(id.name)) { - tolerateError(Messages.StrictVarName); - } - - if (kind === 'const') { - if (!matchKeyword('in') && !matchContextualKeyword('of')) { - expect('='); - init = isolateCoverGrammar(parseAssignmentExpression); - } - } else if ((!options.inFor && id.type !== Syntax.Identifier) || match('=')) { - expect('='); - init = isolateCoverGrammar(parseAssignmentExpression); - } - - return node.finishVariableDeclarator(id, init); - } - - function parseBindingList(kind, options) { - var list = []; - - do { - list.push(parseLexicalBinding(kind, options)); - if (!match(',')) { - break; - } - lex(); - } while (startIndex < length); - - return list; - } - - function parseLexicalDeclaration(options) { - var kind, declarations, node = new Node(); - - kind = lex().value; - assert(kind === 'let' || kind === 'const', 'Lexical declaration must be either let or const'); - - declarations = parseBindingList(kind, options); - - consumeSemicolon(); - - return node.finishLexicalDeclaration(declarations, kind); - } - - function parseRestElement(params) { - var param, node = new Node(); - - lex(); - - if (match('{')) { - throwError(Messages.ObjectPatternAsRestParameter); - } - - params.push(lookahead); - - param = parseVariableIdentifier(); - - if (match('=')) { - throwError(Messages.DefaultRestParameter); - } - - if (!match(')')) { - throwError(Messages.ParameterAfterRestParameter); - } - - return node.finishRestElement(param); - } - - // ECMA-262 13.4 Empty Statement - - function parseEmptyStatement(node) { - expect(';'); - return node.finishEmptyStatement(); - } - - // ECMA-262 12.4 Expression Statement - - function parseExpressionStatement(node) { - var expr = parseExpression(); - consumeSemicolon(); - return node.finishExpressionStatement(expr); - } - - // ECMA-262 13.6 If statement - - function parseIfStatement(node) { - var test, consequent, alternate; - - expectKeyword('if'); - - expect('('); - - test = parseExpression(); - - expect(')'); - - consequent = parseStatement(); - - if (matchKeyword('else')) { - lex(); - alternate = parseStatement(); - } else { - alternate = null; - } - - return node.finishIfStatement(test, consequent, alternate); - } - - // ECMA-262 13.7 Iteration Statements - - function parseDoWhileStatement(node) { - var body, test, oldInIteration; - - expectKeyword('do'); - - oldInIteration = state.inIteration; - state.inIteration = true; - - body = parseStatement(); - - state.inIteration = oldInIteration; - - expectKeyword('while'); - - expect('('); - - test = parseExpression(); - - expect(')'); - - if (match(';')) { - lex(); - } - - return node.finishDoWhileStatement(body, test); - } - - function parseWhileStatement(node) { - var test, body, oldInIteration; - - expectKeyword('while'); - - expect('('); - - test = parseExpression(); - - expect(')'); - - oldInIteration = state.inIteration; - state.inIteration = true; - - body = parseStatement(); - - state.inIteration = oldInIteration; - - return node.finishWhileStatement(test, body); - } - - function parseForStatement(node) { - var init, forIn, initSeq, initStartToken, test, update, left, right, kind, declarations, - body, oldInIteration, previousAllowIn = state.allowIn; - - init = test = update = null; - forIn = true; - - expectKeyword('for'); - - expect('('); - - if (match(';')) { - lex(); - } else { - if (matchKeyword('var')) { - init = new Node(); - lex(); - - state.allowIn = false; - init = init.finishVariableDeclaration(parseVariableDeclarationList()); - state.allowIn = previousAllowIn; - - if (init.declarations.length === 1 && matchKeyword('in')) { - lex(); - left = init; - right = parseExpression(); - init = null; - } else if (init.declarations.length === 1 && init.declarations[0].init === null && matchContextualKeyword('of')) { - lex(); - left = init; - right = parseAssignmentExpression(); - init = null; - forIn = false; - } else { - expect(';'); - } - } else if (matchKeyword('const') || matchKeyword('let')) { - init = new Node(); - kind = lex().value; - - state.allowIn = false; - declarations = parseBindingList(kind, {inFor: true}); - state.allowIn = previousAllowIn; - - if (declarations.length === 1 && declarations[0].init === null && matchKeyword('in')) { - init = init.finishLexicalDeclaration(declarations, kind); - lex(); - left = init; - right = parseExpression(); - init = null; - } else if (declarations.length === 1 && declarations[0].init === null && matchContextualKeyword('of')) { - init = init.finishLexicalDeclaration(declarations, kind); - lex(); - left = init; - right = parseAssignmentExpression(); - init = null; - forIn = false; - } else { - consumeSemicolon(); - init = init.finishLexicalDeclaration(declarations, kind); - } - } else { - initStartToken = lookahead; - state.allowIn = false; - init = inheritCoverGrammar(parseAssignmentExpression); - state.allowIn = previousAllowIn; - - if (matchKeyword('in')) { - if (!isAssignmentTarget) { - tolerateError(Messages.InvalidLHSInForIn); - } - - lex(); - reinterpretExpressionAsPattern(init); - left = init; - right = parseExpression(); - init = null; - } else if (matchContextualKeyword('of')) { - if (!isAssignmentTarget) { - tolerateError(Messages.InvalidLHSInForLoop); - } - - lex(); - reinterpretExpressionAsPattern(init); - left = init; - right = parseAssignmentExpression(); - init = null; - forIn = false; - } else { - if (match(',')) { - initSeq = [init]; - while (match(',')) { - lex(); - initSeq.push(isolateCoverGrammar(parseAssignmentExpression)); - } - init = new WrappingNode(initStartToken).finishSequenceExpression(initSeq); - } - expect(';'); - } - } - } - - if (typeof left === 'undefined') { - - if (!match(';')) { - test = parseExpression(); - } - expect(';'); - - if (!match(')')) { - update = parseExpression(); - } - } - - expect(')'); - - oldInIteration = state.inIteration; - state.inIteration = true; - - body = isolateCoverGrammar(parseStatement); - - state.inIteration = oldInIteration; - - return (typeof left === 'undefined') ? - node.finishForStatement(init, test, update, body) : - forIn ? node.finishForInStatement(left, right, body) : - node.finishForOfStatement(left, right, body); - } - - // ECMA-262 13.8 The continue statement - - function parseContinueStatement(node) { - var label = null, key; - - expectKeyword('continue'); - - // Optimize the most common form: 'continue;'. - if (source.charCodeAt(startIndex) === 0x3B) { - lex(); - - if (!state.inIteration) { - throwError(Messages.IllegalContinue); - } - - return node.finishContinueStatement(null); - } - - if (hasLineTerminator) { - if (!state.inIteration) { - throwError(Messages.IllegalContinue); - } - - return node.finishContinueStatement(null); - } - - if (lookahead.type === Token.Identifier) { - label = parseVariableIdentifier(); - - key = '$' + label.name; - if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) { - throwError(Messages.UnknownLabel, label.name); - } - } - - consumeSemicolon(); - - if (label === null && !state.inIteration) { - throwError(Messages.IllegalContinue); - } - - return node.finishContinueStatement(label); - } - - // ECMA-262 13.9 The break statement - - function parseBreakStatement(node) { - var label = null, key; - - expectKeyword('break'); - - // Catch the very common case first: immediately a semicolon (U+003B). - if (source.charCodeAt(lastIndex) === 0x3B) { - lex(); - - if (!(state.inIteration || state.inSwitch)) { - throwError(Messages.IllegalBreak); - } - - return node.finishBreakStatement(null); - } - - if (hasLineTerminator) { - if (!(state.inIteration || state.inSwitch)) { - throwError(Messages.IllegalBreak); - } - - return node.finishBreakStatement(null); - } - - if (lookahead.type === Token.Identifier) { - label = parseVariableIdentifier(); - - key = '$' + label.name; - if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) { - throwError(Messages.UnknownLabel, label.name); - } - } - - consumeSemicolon(); - - if (label === null && !(state.inIteration || state.inSwitch)) { - throwError(Messages.IllegalBreak); - } - - return node.finishBreakStatement(label); - } - - // ECMA-262 13.10 The return statement - - function parseReturnStatement(node) { - var argument = null; - - expectKeyword('return'); - - if (!state.inFunctionBody) { - tolerateError(Messages.IllegalReturn); - } - - // 'return' followed by a space and an identifier is very common. - if (source.charCodeAt(lastIndex) === 0x20) { - if (isIdentifierStart(source.charCodeAt(lastIndex + 1))) { - argument = parseExpression(); - consumeSemicolon(); - return node.finishReturnStatement(argument); - } - } - - if (hasLineTerminator) { - // HACK - return node.finishReturnStatement(null); - } - - if (!match(';')) { - if (!match('}') && lookahead.type !== Token.EOF) { - argument = parseExpression(); - } - } - - consumeSemicolon(); - - return node.finishReturnStatement(argument); - } - - // ECMA-262 13.11 The with statement - - function parseWithStatement(node) { - var object, body; - - if (strict) { - tolerateError(Messages.StrictModeWith); - } - - expectKeyword('with'); - - expect('('); - - object = parseExpression(); - - expect(')'); - - body = parseStatement(); - - return node.finishWithStatement(object, body); - } - - // ECMA-262 13.12 The switch statement - - function parseSwitchCase() { - var test, consequent = [], statement, node = new Node(); - - if (matchKeyword('default')) { - lex(); - test = null; - } else { - expectKeyword('case'); - test = parseExpression(); - } - expect(':'); - - while (startIndex < length) { - if (match('}') || matchKeyword('default') || matchKeyword('case')) { - break; - } - statement = parseStatementListItem(); - consequent.push(statement); - } - - return node.finishSwitchCase(test, consequent); - } - - function parseSwitchStatement(node) { - var discriminant, cases, clause, oldInSwitch, defaultFound; - - expectKeyword('switch'); - - expect('('); - - discriminant = parseExpression(); - - expect(')'); - - expect('{'); - - cases = []; - - if (match('}')) { - lex(); - return node.finishSwitchStatement(discriminant, cases); - } - - oldInSwitch = state.inSwitch; - state.inSwitch = true; - defaultFound = false; - - while (startIndex < length) { - if (match('}')) { - break; - } - clause = parseSwitchCase(); - if (clause.test === null) { - if (defaultFound) { - throwError(Messages.MultipleDefaultsInSwitch); - } - defaultFound = true; - } - cases.push(clause); - } - - state.inSwitch = oldInSwitch; - - expect('}'); - - return node.finishSwitchStatement(discriminant, cases); - } - - // ECMA-262 13.14 The throw statement - - function parseThrowStatement(node) { - var argument; - - expectKeyword('throw'); - - if (hasLineTerminator) { - throwError(Messages.NewlineAfterThrow); - } - - argument = parseExpression(); - - consumeSemicolon(); - - return node.finishThrowStatement(argument); - } - - // ECMA-262 13.15 The try statement - - function parseCatchClause() { - var param, params = [], paramMap = {}, key, i, body, node = new Node(); - - expectKeyword('catch'); - - expect('('); - if (match(')')) { - throwUnexpectedToken(lookahead); - } - - param = parsePattern(params); - for (i = 0; i < params.length; i++) { - key = '$' + params[i].value; - if (Object.prototype.hasOwnProperty.call(paramMap, key)) { - tolerateError(Messages.DuplicateBinding, params[i].value); - } - paramMap[key] = true; - } - - // ECMA-262 12.14.1 - if (strict && isRestrictedWord(param.name)) { - tolerateError(Messages.StrictCatchVariable); - } - - expect(')'); - body = parseBlock(); - return node.finishCatchClause(param, body); - } - - function parseTryStatement(node) { - var block, handler = null, finalizer = null; - - expectKeyword('try'); - - block = parseBlock(); - - if (matchKeyword('catch')) { - handler = parseCatchClause(); - } - - if (matchKeyword('finally')) { - lex(); - finalizer = parseBlock(); - } - - if (!handler && !finalizer) { - throwError(Messages.NoCatchOrFinally); - } - - return node.finishTryStatement(block, handler, finalizer); - } - - // ECMA-262 13.16 The debugger statement - - function parseDebuggerStatement(node) { - expectKeyword('debugger'); - - consumeSemicolon(); - - return node.finishDebuggerStatement(); - } - - // 13 Statements - - function parseStatement() { - var type = lookahead.type, - expr, - labeledBody, - key, - node; - - if (type === Token.EOF) { - throwUnexpectedToken(lookahead); - } - - if (type === Token.Punctuator && lookahead.value === '{') { - return parseBlock(); - } - isAssignmentTarget = isBindingElement = true; - node = new Node(); - - if (type === Token.Punctuator) { - switch (lookahead.value) { - case ';': - return parseEmptyStatement(node); - case '(': - return parseExpressionStatement(node); - default: - break; - } - } else if (type === Token.Keyword) { - switch (lookahead.value) { - case 'break': - return parseBreakStatement(node); - case 'continue': - return parseContinueStatement(node); - case 'debugger': - return parseDebuggerStatement(node); - case 'do': - return parseDoWhileStatement(node); - case 'for': - return parseForStatement(node); - case 'function': - return parseFunctionDeclaration(node); - case 'if': - return parseIfStatement(node); - case 'return': - return parseReturnStatement(node); - case 'switch': - return parseSwitchStatement(node); - case 'throw': - return parseThrowStatement(node); - case 'try': - return parseTryStatement(node); - case 'var': - return parseVariableStatement(node); - case 'while': - return parseWhileStatement(node); - case 'with': - return parseWithStatement(node); - default: - break; - } - } - - expr = parseExpression(); - - // ECMA-262 12.12 Labelled Statements - if ((expr.type === Syntax.Identifier) && match(':')) { - lex(); - - key = '$' + expr.name; - if (Object.prototype.hasOwnProperty.call(state.labelSet, key)) { - throwError(Messages.Redeclaration, 'Label', expr.name); - } - - state.labelSet[key] = true; - labeledBody = parseStatement(); - delete state.labelSet[key]; - return node.finishLabeledStatement(expr, labeledBody); - } - - consumeSemicolon(); - - return node.finishExpressionStatement(expr); - } - - // ECMA-262 14.1 Function Definition - - function parseFunctionSourceElements() { - var statement, body = [], token, directive, firstRestricted, - oldLabelSet, oldInIteration, oldInSwitch, oldInFunctionBody, oldParenthesisCount, - node = new Node(); - - expect('{'); - - while (startIndex < length) { - if (lookahead.type !== Token.StringLiteral) { - break; - } - token = lookahead; - - statement = parseStatementListItem(); - body.push(statement); - if (statement.expression.type !== Syntax.Literal) { - // this is not directive - break; - } - directive = source.slice(token.start + 1, token.end - 1); - if (directive === 'use strict') { - strict = true; - if (firstRestricted) { - tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral); - } - } else { - if (!firstRestricted && token.octal) { - firstRestricted = token; - } - } - } - - oldLabelSet = state.labelSet; - oldInIteration = state.inIteration; - oldInSwitch = state.inSwitch; - oldInFunctionBody = state.inFunctionBody; - oldParenthesisCount = state.parenthesizedCount; - - state.labelSet = {}; - state.inIteration = false; - state.inSwitch = false; - state.inFunctionBody = true; - state.parenthesizedCount = 0; - - while (startIndex < length) { - if (match('}')) { - break; - } - body.push(parseStatementListItem()); - } - - expect('}'); - - state.labelSet = oldLabelSet; - state.inIteration = oldInIteration; - state.inSwitch = oldInSwitch; - state.inFunctionBody = oldInFunctionBody; - state.parenthesizedCount = oldParenthesisCount; - - return node.finishBlockStatement(body); - } - - function validateParam(options, param, name) { - var key = '$' + name; - if (strict) { - if (isRestrictedWord(name)) { - options.stricted = param; - options.message = Messages.StrictParamName; - } - if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) { - options.stricted = param; - options.message = Messages.StrictParamDupe; - } - } else if (!options.firstRestricted) { - if (isRestrictedWord(name)) { - options.firstRestricted = param; - options.message = Messages.StrictParamName; - } else if (isStrictModeReservedWord(name)) { - options.firstRestricted = param; - options.message = Messages.StrictReservedWord; - } else if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) { - options.stricted = param; - options.message = Messages.StrictParamDupe; - } - } - options.paramSet[key] = true; - } - - function parseParam(options) { - var token, param, params = [], i, def; - - token = lookahead; - if (token.value === '...') { - param = parseRestElement(params); - validateParam(options, param.argument, param.argument.name); - options.params.push(param); - options.defaults.push(null); - return false; - } - - param = parsePatternWithDefault(params); - for (i = 0; i < params.length; i++) { - validateParam(options, params[i], params[i].value); - } - - if (param.type === Syntax.AssignmentPattern) { - def = param.right; - param = param.left; - ++options.defaultCount; - } - - options.params.push(param); - options.defaults.push(def); - - return !match(')'); - } - - function parseParams(firstRestricted) { - var options; - - options = { - params: [], - defaultCount: 0, - defaults: [], - firstRestricted: firstRestricted - }; - - expect('('); - - if (!match(')')) { - options.paramSet = {}; - while (startIndex < length) { - if (!parseParam(options)) { - break; - } - expect(','); - } - } - - expect(')'); - - if (options.defaultCount === 0) { - options.defaults = []; - } - - return { - params: options.params, - defaults: options.defaults, - stricted: options.stricted, - firstRestricted: options.firstRestricted, - message: options.message - }; - } - - function parseFunctionDeclaration(node, identifierIsOptional) { - var id = null, params = [], defaults = [], body, token, stricted, tmp, firstRestricted, message, previousStrict, - isGenerator, previousAllowYield; - - previousAllowYield = state.allowYield; - - expectKeyword('function'); - - isGenerator = match('*'); - if (isGenerator) { - lex(); - } - - if (!identifierIsOptional || !match('(')) { - token = lookahead; - id = parseVariableIdentifier(); - if (strict) { - if (isRestrictedWord(token.value)) { - tolerateUnexpectedToken(token, Messages.StrictFunctionName); - } - } else { - if (isRestrictedWord(token.value)) { - firstRestricted = token; - message = Messages.StrictFunctionName; - } else if (isStrictModeReservedWord(token.value)) { - firstRestricted = token; - message = Messages.StrictReservedWord; - } - } - } - - state.allowYield = !isGenerator; - tmp = parseParams(firstRestricted); - params = tmp.params; - defaults = tmp.defaults; - stricted = tmp.stricted; - firstRestricted = tmp.firstRestricted; - if (tmp.message) { - message = tmp.message; - } - - - previousStrict = strict; - body = parseFunctionSourceElements(); - if (strict && firstRestricted) { - throwUnexpectedToken(firstRestricted, message); - } - if (strict && stricted) { - tolerateUnexpectedToken(stricted, message); - } - - strict = previousStrict; - state.allowYield = previousAllowYield; - - return node.finishFunctionDeclaration(id, params, defaults, body, isGenerator); - } - - function parseFunctionExpression() { - var token, id = null, stricted, firstRestricted, message, tmp, - params = [], defaults = [], body, previousStrict, node = new Node(), - isGenerator, previousAllowYield; - - previousAllowYield = state.allowYield; - - expectKeyword('function'); - - isGenerator = match('*'); - if (isGenerator) { - lex(); - } - - state.allowYield = !isGenerator; - if (!match('(')) { - token = lookahead; - id = (!strict && !isGenerator && matchKeyword('yield')) ? parseNonComputedProperty() : parseVariableIdentifier(); - if (strict) { - if (isRestrictedWord(token.value)) { - tolerateUnexpectedToken(token, Messages.StrictFunctionName); - } - } else { - if (isRestrictedWord(token.value)) { - firstRestricted = token; - message = Messages.StrictFunctionName; - } else if (isStrictModeReservedWord(token.value)) { - firstRestricted = token; - message = Messages.StrictReservedWord; - } - } - } - - tmp = parseParams(firstRestricted); - params = tmp.params; - defaults = tmp.defaults; - stricted = tmp.stricted; - firstRestricted = tmp.firstRestricted; - if (tmp.message) { - message = tmp.message; - } - - previousStrict = strict; - body = parseFunctionSourceElements(); - if (strict && firstRestricted) { - throwUnexpectedToken(firstRestricted, message); - } - if (strict && stricted) { - tolerateUnexpectedToken(stricted, message); - } - strict = previousStrict; - state.allowYield = previousAllowYield; - - return node.finishFunctionExpression(id, params, defaults, body, isGenerator); - } - - // ECMA-262 14.5 Class Definitions - - function parseClassBody() { - var classBody, token, isStatic, hasConstructor = false, body, method, computed, key; - - classBody = new Node(); - - expect('{'); - body = []; - while (!match('}')) { - if (match(';')) { - lex(); - } else { - method = new Node(); - token = lookahead; - isStatic = false; - computed = match('['); - if (match('*')) { - lex(); - } else { - key = parseObjectPropertyKey(); - if (key.name === 'static' && (lookaheadPropertyName() || match('*'))) { - token = lookahead; - isStatic = true; - computed = match('['); - if (match('*')) { - lex(); - } else { - key = parseObjectPropertyKey(); - } - } - } - method = tryParseMethodDefinition(token, key, computed, method); - if (method) { - method['static'] = isStatic; // jscs:ignore requireDotNotation - if (method.kind === 'init') { - method.kind = 'method'; - } - if (!isStatic) { - if (!method.computed && (method.key.name || method.key.value.toString()) === 'constructor') { - if (method.kind !== 'method' || !method.method || method.value.generator) { - throwUnexpectedToken(token, Messages.ConstructorSpecialMethod); - } - if (hasConstructor) { - throwUnexpectedToken(token, Messages.DuplicateConstructor); - } else { - hasConstructor = true; - } - method.kind = 'constructor'; - } - } else { - if (!method.computed && (method.key.name || method.key.value.toString()) === 'prototype') { - throwUnexpectedToken(token, Messages.StaticPrototype); - } - } - method.type = Syntax.MethodDefinition; - delete method.method; - delete method.shorthand; - body.push(method); - } else { - throwUnexpectedToken(lookahead); - } - } - } - lex(); - return classBody.finishClassBody(body); - } - - function parseClassDeclaration(identifierIsOptional) { - var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict; - strict = true; - - expectKeyword('class'); - - if (!identifierIsOptional || lookahead.type === Token.Identifier) { - id = parseVariableIdentifier(); - } - - if (matchKeyword('extends')) { - lex(); - superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall); - } - classBody = parseClassBody(); - strict = previousStrict; - - return classNode.finishClassDeclaration(id, superClass, classBody); - } - - function parseClassExpression() { - var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict; - strict = true; - - expectKeyword('class'); - - if (lookahead.type === Token.Identifier) { - id = parseVariableIdentifier(); - } - - if (matchKeyword('extends')) { - lex(); - superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall); - } - classBody = parseClassBody(); - strict = previousStrict; - - return classNode.finishClassExpression(id, superClass, classBody); - } - - // ECMA-262 15.2 Modules - - function parseModuleSpecifier() { - var node = new Node(); - - if (lookahead.type !== Token.StringLiteral) { - throwError(Messages.InvalidModuleSpecifier); - } - return node.finishLiteral(lex()); - } - - // ECMA-262 15.2.3 Exports - - function parseExportSpecifier() { - var exported, local, node = new Node(), def; - if (matchKeyword('default')) { - // export {default} from 'something'; - def = new Node(); - lex(); - local = def.finishIdentifier('default'); - } else { - local = parseVariableIdentifier(); - } - if (matchContextualKeyword('as')) { - lex(); - exported = parseNonComputedProperty(); - } - return node.finishExportSpecifier(local, exported); - } - - function parseExportNamedDeclaration(node) { - var declaration = null, - isExportFromIdentifier, - src = null, specifiers = []; - - // non-default export - if (lookahead.type === Token.Keyword) { - // covers: - // export var f = 1; - switch (lookahead.value) { - case 'let': - case 'const': - case 'var': - case 'class': - case 'function': - declaration = parseStatementListItem(); - return node.finishExportNamedDeclaration(declaration, specifiers, null); - } - } - - expect('{'); - while (!match('}')) { - isExportFromIdentifier = isExportFromIdentifier || matchKeyword('default'); - specifiers.push(parseExportSpecifier()); - if (!match('}')) { - expect(','); - if (match('}')) { - break; - } - } - } - expect('}'); - - if (matchContextualKeyword('from')) { - // covering: - // export {default} from 'foo'; - // export {foo} from 'foo'; - lex(); - src = parseModuleSpecifier(); - consumeSemicolon(); - } else if (isExportFromIdentifier) { - // covering: - // export {default}; // missing fromClause - throwError(lookahead.value ? - Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value); - } else { - // cover - // export {foo}; - consumeSemicolon(); - } - return node.finishExportNamedDeclaration(declaration, specifiers, src); - } - - function parseExportDefaultDeclaration(node) { - var declaration = null, - expression = null; - - // covers: - // export default ... - expectKeyword('default'); - - if (matchKeyword('function')) { - // covers: - // export default function foo () {} - // export default function () {} - declaration = parseFunctionDeclaration(new Node(), true); - return node.finishExportDefaultDeclaration(declaration); - } - if (matchKeyword('class')) { - declaration = parseClassDeclaration(true); - return node.finishExportDefaultDeclaration(declaration); - } - - if (matchContextualKeyword('from')) { - throwError(Messages.UnexpectedToken, lookahead.value); - } - - // covers: - // export default {}; - // export default []; - // export default (1 + 2); - if (match('{')) { - expression = parseObjectInitializer(); - } else if (match('[')) { - expression = parseArrayInitializer(); - } else { - expression = parseAssignmentExpression(); - } - consumeSemicolon(); - return node.finishExportDefaultDeclaration(expression); - } - - function parseExportAllDeclaration(node) { - var src; - - // covers: - // export * from 'foo'; - expect('*'); - if (!matchContextualKeyword('from')) { - throwError(lookahead.value ? - Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value); - } - lex(); - src = parseModuleSpecifier(); - consumeSemicolon(); - - return node.finishExportAllDeclaration(src); - } - - function parseExportDeclaration() { - var node = new Node(); - if (state.inFunctionBody) { - throwError(Messages.IllegalExportDeclaration); - } - - expectKeyword('export'); - - if (matchKeyword('default')) { - return parseExportDefaultDeclaration(node); - } - if (match('*')) { - return parseExportAllDeclaration(node); - } - return parseExportNamedDeclaration(node); - } - - // ECMA-262 15.2.2 Imports - - function parseImportSpecifier() { - // import {} ...; - var local, imported, node = new Node(); - - imported = parseNonComputedProperty(); - if (matchContextualKeyword('as')) { - lex(); - local = parseVariableIdentifier(); - } - - return node.finishImportSpecifier(local, imported); - } - - function parseNamedImports() { - var specifiers = []; - // {foo, bar as bas} - expect('{'); - while (!match('}')) { - specifiers.push(parseImportSpecifier()); - if (!match('}')) { - expect(','); - if (match('}')) { - break; - } - } - } - expect('}'); - return specifiers; - } - - function parseImportDefaultSpecifier() { - // import ...; - var local, node = new Node(); - - local = parseNonComputedProperty(); - - return node.finishImportDefaultSpecifier(local); - } - - function parseImportNamespaceSpecifier() { - // import <* as foo> ...; - var local, node = new Node(); - - expect('*'); - if (!matchContextualKeyword('as')) { - throwError(Messages.NoAsAfterImportNamespace); - } - lex(); - local = parseNonComputedProperty(); - - return node.finishImportNamespaceSpecifier(local); - } - - function parseImportDeclaration() { - var specifiers = [], src, node = new Node(); - - if (state.inFunctionBody) { - throwError(Messages.IllegalImportDeclaration); - } - - expectKeyword('import'); - - if (lookahead.type === Token.StringLiteral) { - // import 'foo'; - src = parseModuleSpecifier(); - } else { - - if (match('{')) { - // import {bar} - specifiers = specifiers.concat(parseNamedImports()); - } else if (match('*')) { - // import * as foo - specifiers.push(parseImportNamespaceSpecifier()); - } else if (isIdentifierName(lookahead) && !matchKeyword('default')) { - // import foo - specifiers.push(parseImportDefaultSpecifier()); - if (match(',')) { - lex(); - if (match('*')) { - // import foo, * as foo - specifiers.push(parseImportNamespaceSpecifier()); - } else if (match('{')) { - // import foo, {bar} - specifiers = specifiers.concat(parseNamedImports()); - } else { - throwUnexpectedToken(lookahead); - } - } - } else { - throwUnexpectedToken(lex()); - } - - if (!matchContextualKeyword('from')) { - throwError(lookahead.value ? - Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value); - } - lex(); - src = parseModuleSpecifier(); - } - - consumeSemicolon(); - return node.finishImportDeclaration(specifiers, src); - } - - // ECMA-262 15.1 Scripts - - function parseScriptBody() { - var statement, body = [], token, directive, firstRestricted; - - while (startIndex < length) { - token = lookahead; - if (token.type !== Token.StringLiteral) { - break; - } - - statement = parseStatementListItem(); - body.push(statement); - if (statement.expression.type !== Syntax.Literal) { - // this is not directive - break; - } - directive = source.slice(token.start + 1, token.end - 1); - if (directive === 'use strict') { - strict = true; - if (firstRestricted) { - tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral); - } - } else { - if (!firstRestricted && token.octal) { - firstRestricted = token; - } - } - } - - while (startIndex < length) { - statement = parseStatementListItem(); - /* istanbul ignore if */ - if (typeof statement === 'undefined') { - break; - } - body.push(statement); - } - return body; - } - - function parseProgram() { - var body, node; - - peek(); - node = new Node(); - - body = parseScriptBody(); - return node.finishProgram(body, state.sourceType); - } - - function filterTokenLocation() { - var i, entry, token, tokens = []; - - for (i = 0; i < extra.tokens.length; ++i) { - entry = extra.tokens[i]; - token = { - type: entry.type, - value: entry.value - }; - if (entry.regex) { - token.regex = { - pattern: entry.regex.pattern, - flags: entry.regex.flags - }; - } - if (extra.range) { - token.range = entry.range; - } - if (extra.loc) { - token.loc = entry.loc; - } - tokens.push(token); - } - - extra.tokens = tokens; - } - - function tokenize(code, options) { - var toString, - tokens; - - toString = String; - if (typeof code !== 'string' && !(code instanceof String)) { - code = toString(code); - } - - source = code; - index = 0; - lineNumber = (source.length > 0) ? 1 : 0; - lineStart = 0; - startIndex = index; - startLineNumber = lineNumber; - startLineStart = lineStart; - length = source.length; - lookahead = null; - state = { - allowIn: true, - allowYield: true, - labelSet: {}, - inFunctionBody: false, - inIteration: false, - inSwitch: false, - lastCommentStart: -1, - curlyStack: [] - }; - - extra = {}; - - // Options matching. - options = options || {}; - - // Of course we collect tokens here. - options.tokens = true; - extra.tokens = []; - extra.tokenize = true; - // The following two fields are necessary to compute the Regex tokens. - extra.openParenToken = -1; - extra.openCurlyToken = -1; - - extra.range = (typeof options.range === 'boolean') && options.range; - extra.loc = (typeof options.loc === 'boolean') && options.loc; - - if (typeof options.comment === 'boolean' && options.comment) { - extra.comments = []; - } - if (typeof options.tolerant === 'boolean' && options.tolerant) { - extra.errors = []; - } - - try { - peek(); - if (lookahead.type === Token.EOF) { - return extra.tokens; - } - - lex(); - while (lookahead.type !== Token.EOF) { - try { - lex(); - } catch (lexError) { - if (extra.errors) { - recordError(lexError); - // We have to break on the first error - // to avoid infinite loops. - break; - } else { - throw lexError; - } - } - } - - filterTokenLocation(); - tokens = extra.tokens; - if (typeof extra.comments !== 'undefined') { - tokens.comments = extra.comments; - } - if (typeof extra.errors !== 'undefined') { - tokens.errors = extra.errors; - } - } catch (e) { - throw e; - } finally { - extra = {}; - } - return tokens; - } - - function parse(code, options) { - var program, toString; - - toString = String; - if (typeof code !== 'string' && !(code instanceof String)) { - code = toString(code); - } - - source = code; - index = 0; - lineNumber = (source.length > 0) ? 1 : 0; - lineStart = 0; - startIndex = index; - startLineNumber = lineNumber; - startLineStart = lineStart; - length = source.length; - lookahead = null; - state = { - allowIn: true, - allowYield: true, - labelSet: {}, - inFunctionBody: false, - inIteration: false, - inSwitch: false, - lastCommentStart: -1, - curlyStack: [], - sourceType: 'script' - }; - strict = false; - - extra = {}; - if (typeof options !== 'undefined') { - extra.range = (typeof options.range === 'boolean') && options.range; - extra.loc = (typeof options.loc === 'boolean') && options.loc; - extra.attachComment = (typeof options.attachComment === 'boolean') && options.attachComment; - - if (extra.loc && options.source !== null && options.source !== undefined) { - extra.source = toString(options.source); - } - - if (typeof options.tokens === 'boolean' && options.tokens) { - extra.tokens = []; - } - if (typeof options.comment === 'boolean' && options.comment) { - extra.comments = []; - } - if (typeof options.tolerant === 'boolean' && options.tolerant) { - extra.errors = []; - } - if (extra.attachComment) { - extra.range = true; - extra.comments = []; - extra.bottomRightStack = []; - extra.trailingComments = []; - extra.leadingComments = []; - } - if (options.sourceType === 'module') { - // very restrictive condition for now - state.sourceType = options.sourceType; - strict = true; - } - } - - try { - program = parseProgram(); - if (typeof extra.comments !== 'undefined') { - program.comments = extra.comments; - } - if (typeof extra.tokens !== 'undefined') { - filterTokenLocation(); - program.tokens = extra.tokens; - } - if (typeof extra.errors !== 'undefined') { - program.errors = extra.errors; - } - } catch (e) { - throw e; - } finally { - extra = {}; - } - - return program; - } - - // Sync with *.json manifests. - exports.version = '2.5.0'; - - exports.tokenize = tokenize; - - exports.parse = parse; - - // Deep copy. - /* istanbul ignore next */ - exports.Syntax = (function () { - var name, types = {}; - - if (typeof Object.create === 'function') { - types = Object.create(null); - } - - for (name in Syntax) { - if (Syntax.hasOwnProperty(name)) { - types[name] = Syntax[name]; - } - } - - if (typeof Object.freeze === 'function') { - Object.freeze(types); - } - - return types; - }()); - -})); -/* vim: set sw=4 ts=4 et tw=80 : */ \ No newline at end of file diff --git a/test/3rdparty/esprima-2.7.1.js b/test/3rdparty/esprima-2.7.1.js new file mode 100644 index 00000000..0a21b463 --- /dev/null +++ b/test/3rdparty/esprima-2.7.1.js @@ -0,0 +1,5741 @@ +/* + Copyright (c) jQuery Foundation, Inc. and Contributors, All Rights Reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY + DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +(function (root, factory) { + 'use strict'; + + // Universal Module Definition (UMD) to support AMD, CommonJS/Node.js, + // Rhino, and plain browser loading. + + /* istanbul ignore next */ + if (typeof define === 'function' && define.amd) { + define(['exports'], factory); + } else if (typeof exports !== 'undefined') { + factory(exports); + } else { + factory((root.esprima = {})); + } +}(this, function (exports) { + 'use strict'; + + var Token, + TokenName, + FnExprTokens, + Syntax, + PlaceHolders, + Messages, + Regex, + source, + strict, + index, + lineNumber, + lineStart, + hasLineTerminator, + lastIndex, + lastLineNumber, + lastLineStart, + startIndex, + startLineNumber, + startLineStart, + scanning, + length, + lookahead, + state, + extra, + isBindingElement, + isAssignmentTarget, + firstCoverInitializedNameError; + + Token = { + BooleanLiteral: 1, + EOF: 2, + Identifier: 3, + Keyword: 4, + NullLiteral: 5, + NumericLiteral: 6, + Punctuator: 7, + StringLiteral: 8, + RegularExpression: 9, + Template: 10 + }; + + TokenName = {}; + TokenName[Token.BooleanLiteral] = 'Boolean'; + TokenName[Token.EOF] = ''; + TokenName[Token.Identifier] = 'Identifier'; + TokenName[Token.Keyword] = 'Keyword'; + TokenName[Token.NullLiteral] = 'Null'; + TokenName[Token.NumericLiteral] = 'Numeric'; + TokenName[Token.Punctuator] = 'Punctuator'; + TokenName[Token.StringLiteral] = 'String'; + TokenName[Token.RegularExpression] = 'RegularExpression'; + TokenName[Token.Template] = 'Template'; + + // A function following one of those tokens is an expression. + FnExprTokens = ['(', '{', '[', 'in', 'typeof', 'instanceof', 'new', + 'return', 'case', 'delete', 'throw', 'void', + // assignment operators + '=', '+=', '-=', '*=', '/=', '%=', '<<=', '>>=', '>>>=', + '&=', '|=', '^=', ',', + // binary/unary operators + '+', '-', '*', '/', '%', '++', '--', '<<', '>>', '>>>', '&', + '|', '^', '!', '~', '&&', '||', '?', ':', '===', '==', '>=', + '<=', '<', '>', '!=', '!==']; + + Syntax = { + AssignmentExpression: 'AssignmentExpression', + AssignmentPattern: 'AssignmentPattern', + ArrayExpression: 'ArrayExpression', + ArrayPattern: 'ArrayPattern', + ArrowFunctionExpression: 'ArrowFunctionExpression', + BlockStatement: 'BlockStatement', + BinaryExpression: 'BinaryExpression', + BreakStatement: 'BreakStatement', + CallExpression: 'CallExpression', + CatchClause: 'CatchClause', + ClassBody: 'ClassBody', + ClassDeclaration: 'ClassDeclaration', + ClassExpression: 'ClassExpression', + ConditionalExpression: 'ConditionalExpression', + ContinueStatement: 'ContinueStatement', + DoWhileStatement: 'DoWhileStatement', + DebuggerStatement: 'DebuggerStatement', + EmptyStatement: 'EmptyStatement', + ExportAllDeclaration: 'ExportAllDeclaration', + ExportDefaultDeclaration: 'ExportDefaultDeclaration', + ExportNamedDeclaration: 'ExportNamedDeclaration', + ExportSpecifier: 'ExportSpecifier', + ExpressionStatement: 'ExpressionStatement', + ForStatement: 'ForStatement', + ForOfStatement: 'ForOfStatement', + ForInStatement: 'ForInStatement', + FunctionDeclaration: 'FunctionDeclaration', + FunctionExpression: 'FunctionExpression', + Identifier: 'Identifier', + IfStatement: 'IfStatement', + ImportDeclaration: 'ImportDeclaration', + ImportDefaultSpecifier: 'ImportDefaultSpecifier', + ImportNamespaceSpecifier: 'ImportNamespaceSpecifier', + ImportSpecifier: 'ImportSpecifier', + Literal: 'Literal', + LabeledStatement: 'LabeledStatement', + LogicalExpression: 'LogicalExpression', + MemberExpression: 'MemberExpression', + MetaProperty: 'MetaProperty', + MethodDefinition: 'MethodDefinition', + NewExpression: 'NewExpression', + ObjectExpression: 'ObjectExpression', + ObjectPattern: 'ObjectPattern', + Program: 'Program', + Property: 'Property', + RestElement: 'RestElement', + ReturnStatement: 'ReturnStatement', + SequenceExpression: 'SequenceExpression', + SpreadElement: 'SpreadElement', + Super: 'Super', + SwitchCase: 'SwitchCase', + SwitchStatement: 'SwitchStatement', + TaggedTemplateExpression: 'TaggedTemplateExpression', + TemplateElement: 'TemplateElement', + TemplateLiteral: 'TemplateLiteral', + ThisExpression: 'ThisExpression', + ThrowStatement: 'ThrowStatement', + TryStatement: 'TryStatement', + UnaryExpression: 'UnaryExpression', + UpdateExpression: 'UpdateExpression', + VariableDeclaration: 'VariableDeclaration', + VariableDeclarator: 'VariableDeclarator', + WhileStatement: 'WhileStatement', + WithStatement: 'WithStatement', + YieldExpression: 'YieldExpression' + }; + + PlaceHolders = { + ArrowParameterPlaceHolder: 'ArrowParameterPlaceHolder' + }; + + // Error messages should be identical to V8. + Messages = { + UnexpectedToken: 'Unexpected token %0', + UnexpectedNumber: 'Unexpected number', + UnexpectedString: 'Unexpected string', + UnexpectedIdentifier: 'Unexpected identifier', + UnexpectedReserved: 'Unexpected reserved word', + UnexpectedTemplate: 'Unexpected quasi %0', + UnexpectedEOS: 'Unexpected end of input', + NewlineAfterThrow: 'Illegal newline after throw', + InvalidRegExp: 'Invalid regular expression', + UnterminatedRegExp: 'Invalid regular expression: missing /', + InvalidLHSInAssignment: 'Invalid left-hand side in assignment', + InvalidLHSInForIn: 'Invalid left-hand side in for-in', + InvalidLHSInForLoop: 'Invalid left-hand side in for-loop', + MultipleDefaultsInSwitch: 'More than one default clause in switch statement', + NoCatchOrFinally: 'Missing catch or finally after try', + UnknownLabel: 'Undefined label \'%0\'', + Redeclaration: '%0 \'%1\' has already been declared', + IllegalContinue: 'Illegal continue statement', + IllegalBreak: 'Illegal break statement', + IllegalReturn: 'Illegal return statement', + StrictModeWith: 'Strict mode code may not include a with statement', + StrictCatchVariable: 'Catch variable may not be eval or arguments in strict mode', + StrictVarName: 'Variable name may not be eval or arguments in strict mode', + StrictParamName: 'Parameter name eval or arguments is not allowed in strict mode', + StrictParamDupe: 'Strict mode function may not have duplicate parameter names', + StrictFunctionName: 'Function name may not be eval or arguments in strict mode', + StrictOctalLiteral: 'Octal literals are not allowed in strict mode.', + StrictDelete: 'Delete of an unqualified identifier in strict mode.', + StrictLHSAssignment: 'Assignment to eval or arguments is not allowed in strict mode', + StrictLHSPostfix: 'Postfix increment/decrement may not have eval or arguments operand in strict mode', + StrictLHSPrefix: 'Prefix increment/decrement may not have eval or arguments operand in strict mode', + StrictReservedWord: 'Use of future reserved word in strict mode', + TemplateOctalLiteral: 'Octal literals are not allowed in template strings.', + ParameterAfterRestParameter: 'Rest parameter must be last formal parameter', + DefaultRestParameter: 'Unexpected token =', + ObjectPatternAsRestParameter: 'Unexpected token {', + DuplicateProtoProperty: 'Duplicate __proto__ fields are not allowed in object literals', + ConstructorSpecialMethod: 'Class constructor may not be an accessor', + DuplicateConstructor: 'A class may only have one constructor', + StaticPrototype: 'Classes may not have static property named prototype', + MissingFromClause: 'Unexpected token', + NoAsAfterImportNamespace: 'Unexpected token', + InvalidModuleSpecifier: 'Unexpected token', + IllegalImportDeclaration: 'Unexpected token', + IllegalExportDeclaration: 'Unexpected token', + DuplicateBinding: 'Duplicate binding %0' + }; + + // See also tools/generate-unicode-regex.js. + Regex = { + // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierStart: + NonAsciiIdentifierStart: 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+ + // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierPart: + NonAsciiIdentifierPart: /[\xAA\xB5\xB7\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0300-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u0483-\u0487\u048A-\u052F\u0531-\u0556\u0559\u0561-\u0587\u0591-\u05BD\u05BF\u05C1\u05C2\u05C4\u05C5\u05C7\u05D0-\u05EA\u05F0-\u05F2\u0610-\u061A\u0620-\u0669\u066E-\u06D3\u06D5-\u06DC\u06DF-\u06E8\u06EA-\u06FC\u06FF\u0710-\u074A\u074D-\u07B1\u07C0-\u07F5\u07FA\u0800-\u082D\u0840-\u085B\u08A0-\u08B2\u08E4-\u0963\u0966-\u096F\u0971-\u0983\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BC-\u09C4\u09C7\u09C8\u09CB-\u09CE\u09D7\u09DC\u09DD\u09DF-\u09E3\u09E6-\u09F1\u0A01-\u0A03\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A3C\u0A3E-\u0A42\u0A47\u0A48\u0A4B-\u0A4D\u0A51\u0A59-\u0A5C\u0A5E\u0A66-\u0A75\u0A81-\u0A83\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABC-\u0AC5\u0AC7-\u0AC9\u0ACB-\u0ACD\u0AD0\u0AE0-\u0AE3\u0AE6-\u0AEF\u0B01-\u0B03\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3C-\u0B44\u0B47\u0B48\u0B4B-\u0B4D\u0B56\u0B57\u0B5C\u0B5D\u0B5F-\u0B63\u0B66-\u0B6F\u0B71\u0B82\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BBE-\u0BC2\u0BC6-\u0BC8\u0BCA-\u0BCD\u0BD0\u0BD7\u0BE6-\u0BEF\u0C00-\u0C03\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D-\u0C44\u0C46-\u0C48\u0C4A-\u0C4D\u0C55\u0C56\u0C58\u0C59\u0C60-\u0C63\u0C66-\u0C6F\u0C81-\u0C83\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBC-\u0CC4\u0CC6-\u0CC8\u0CCA-\u0CCD\u0CD5\u0CD6\u0CDE\u0CE0-\u0CE3\u0CE6-\u0CEF\u0CF1\u0CF2\u0D01-\u0D03\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D-\u0D44\u0D46-\u0D48\u0D4A-\u0D4E\u0D57\u0D60-\u0D63\u0D66-\u0D6F\u0D7A-\u0D7F\u0D82\u0D83\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0DCA\u0DCF-\u0DD4\u0DD6\u0DD8-\u0DDF\u0DE6-\u0DEF\u0DF2\u0DF3\u0E01-\u0E3A\u0E40-\u0E4E\u0E50-\u0E59\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB9\u0EBB-\u0EBD\u0EC0-\u0EC4\u0EC6\u0EC8-\u0ECD\u0ED0-\u0ED9\u0EDC-\u0EDF\u0F00\u0F18\u0F19\u0F20-\u0F29\u0F35\u0F37\u0F39\u0F3E-\u0F47\u0F49-\u0F6C\u0F71-\u0F84\u0F86-\u0F97\u0F99-\u0FBC\u0FC6\u1000-\u1049\u1050-\u109D\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u135D-\u135F\u1369-\u1371\u1380-\u138F\u13A0-\u13F4\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1714\u1720-\u1734\u1740-\u1753\u1760-\u176C\u176E-\u1770\u1772\u1773\u1780-\u17D3\u17D7\u17DC\u17DD\u17E0-\u17E9\u180B-\u180D\u1810-\u1819\u1820-\u1877\u1880-\u18AA\u18B0-\u18F5\u1900-\u191E\u1920-\u192B\u1930-\u193B\u1946-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u19D0-\u19DA\u1A00-\u1A1B\u1A20-\u1A5E\u1A60-\u1A7C\u1A7F-\u1A89\u1A90-\u1A99\u1AA7\u1AB0-\u1ABD\u1B00-\u1B4B\u1B50-\u1B59\u1B6B-\u1B73\u1B80-\u1BF3\u1C00-\u1C37\u1C40-\u1C49\u1C4D-\u1C7D\u1CD0-\u1CD2\u1CD4-\u1CF6\u1CF8\u1CF9\u1D00-\u1DF5\u1DFC-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u200C\u200D\u203F\u2040\u2054\u2071\u207F\u2090-\u209C\u20D0-\u20DC\u20E1\u20E5-\u20F0\u2102\u2107\u210A-\u2113\u2115\u2118-\u211D\u2124\u2126\u2128\u212A-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2160-\u2188\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D7F-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2DE0-\u2DFF\u3005-\u3007\u3021-\u302F\u3031-\u3035\u3038-\u303C\u3041-\u3096\u3099-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66F\uA674-\uA67D\uA67F-\uA69D\uA69F-\uA6F1\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA7AD\uA7B0\uA7B1\uA7F7-\uA827\uA840-\uA873\uA880-\uA8C4\uA8D0-\uA8D9\uA8E0-\uA8F7\uA8FB\uA900-\uA92D\uA930-\uA953\uA960-\uA97C\uA980-\uA9C0\uA9CF-\uA9D9\uA9E0-\uA9FE\uAA00-\uAA36\uAA40-\uAA4D\uAA50-\uAA59\uAA60-\uAA76\uAA7A-\uAAC2\uAADB-\uAADD\uAAE0-\uAAEF\uAAF2-\uAAF6\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB5F\uAB64\uAB65\uABC0-\uABEA\uABEC\uABED\uABF0-\uABF9\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE00-\uFE0F\uFE20-\uFE2D\uFE33\uFE34\uFE4D-\uFE4F\uFE70-\uFE74\uFE76-\uFEFC\uFF10-\uFF19\uFF21-\uFF3A\uFF3F\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD40-\uDD74\uDDFD\uDE80-\uDE9C\uDEA0-\uDED0\uDEE0\uDF00-\uDF1F\uDF30-\uDF4A\uDF50-\uDF7A\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDCA0-\uDCA9\uDD00-\uDD27\uDD30-\uDD63\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC60-\uDC76\uDC80-\uDC9E\uDD00-\uDD15\uDD20-\uDD39\uDD80-\uDDB7\uDDBE\uDDBF\uDE00-\uDE03\uDE05\uDE06\uDE0C-\uDE13\uDE15-\uDE17\uDE19-\uDE33\uDE38-\uDE3A\uDE3F\uDE60-\uDE7C\uDE80-\uDE9C\uDEC0-\uDEC7\uDEC9-\uDEE6\uDF00-\uDF35\uDF40-\uDF55\uDF60-\uDF72\uDF80-\uDF91]|\uD803[\uDC00-\uDC48]|\uD804[\uDC00-\uDC46\uDC66-\uDC6F\uDC7F-\uDCBA\uDCD0-\uDCE8\uDCF0-\uDCF9\uDD00-\uDD34\uDD36-\uDD3F\uDD50-\uDD73\uDD76\uDD80-\uDDC4\uDDD0-\uDDDA\uDE00-\uDE11\uDE13-\uDE37\uDEB0-\uDEEA\uDEF0-\uDEF9\uDF01-\uDF03\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3C-\uDF44\uDF47\uDF48\uDF4B-\uDF4D\uDF57\uDF5D-\uDF63\uDF66-\uDF6C\uDF70-\uDF74]|\uD805[\uDC80-\uDCC5\uDCC7\uDCD0-\uDCD9\uDD80-\uDDB5\uDDB8-\uDDC0\uDE00-\uDE40\uDE44\uDE50-\uDE59\uDE80-\uDEB7\uDEC0-\uDEC9]|\uD806[\uDCA0-\uDCE9\uDCFF\uDEC0-\uDEF8]|\uD808[\uDC00-\uDF98]|\uD809[\uDC00-\uDC6E]|[\uD80C\uD840-\uD868\uD86A-\uD86C][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDE60-\uDE69\uDED0-\uDEED\uDEF0-\uDEF4\uDF00-\uDF36\uDF40-\uDF43\uDF50-\uDF59\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDF00-\uDF44\uDF50-\uDF7E\uDF8F-\uDF9F]|\uD82C[\uDC00\uDC01]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99\uDC9D\uDC9E]|\uD834[\uDD65-\uDD69\uDD6D-\uDD72\uDD7B-\uDD82\uDD85-\uDD8B\uDDAA-\uDDAD\uDE42-\uDE44]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB\uDFCE-\uDFFF]|\uD83A[\uDC00-\uDCC4\uDCD0-\uDCD6]|\uD83B[\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD869[\uDC00-\uDED6\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D]|\uD87E[\uDC00-\uDE1D]|\uDB40[\uDD00-\uDDEF]/ + }; + + // Ensure the condition is true, otherwise throw an error. + // This is only to have a better contract semantic, i.e. another safety net + // to catch a logic error. The condition shall be fulfilled in normal case. + // Do NOT use this to enforce a certain condition on any user input. + + function assert(condition, message) { + /* istanbul ignore if */ + if (!condition) { + throw new Error('ASSERT: ' + message); + } + } + + function isDecimalDigit(ch) { + return (ch >= 0x30 && ch <= 0x39); // 0..9 + } + + function isHexDigit(ch) { + return '0123456789abcdefABCDEF'.indexOf(ch) >= 0; + } + + function isOctalDigit(ch) { + return '01234567'.indexOf(ch) >= 0; + } + + function octalToDecimal(ch) { + // \0 is not octal escape sequence + var octal = (ch !== '0'), code = '01234567'.indexOf(ch); + + if (index < length && isOctalDigit(source[index])) { + octal = true; + code = code * 8 + '01234567'.indexOf(source[index++]); + + // 3 digits are only allowed when string starts + // with 0, 1, 2, 3 + if ('0123'.indexOf(ch) >= 0 && + index < length && + isOctalDigit(source[index])) { + code = code * 8 + '01234567'.indexOf(source[index++]); + } + } + + return { + code: code, + octal: octal + }; + } + + // ECMA-262 11.2 White Space + + function isWhiteSpace(ch) { + return (ch === 0x20) || (ch === 0x09) || (ch === 0x0B) || (ch === 0x0C) || (ch === 0xA0) || + (ch >= 0x1680 && [0x1680, 0x180E, 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200A, 0x202F, 0x205F, 0x3000, 0xFEFF].indexOf(ch) >= 0); + } + + // ECMA-262 11.3 Line Terminators + + function isLineTerminator(ch) { + return (ch === 0x0A) || (ch === 0x0D) || (ch === 0x2028) || (ch === 0x2029); + } + + // ECMA-262 11.6 Identifier Names and Identifiers + + function fromCodePoint(cp) { + return (cp < 0x10000) ? String.fromCharCode(cp) : + String.fromCharCode(0xD800 + ((cp - 0x10000) >> 10)) + + String.fromCharCode(0xDC00 + ((cp - 0x10000) & 1023)); + } + + function isIdentifierStart(ch) { + return (ch === 0x24) || (ch === 0x5F) || // $ (dollar) and _ (underscore) + (ch >= 0x41 && ch <= 0x5A) || // A..Z + (ch >= 0x61 && ch <= 0x7A) || // a..z + (ch === 0x5C) || // \ (backslash) + ((ch >= 0x80) && Regex.NonAsciiIdentifierStart.test(fromCodePoint(ch))); + } + + function isIdentifierPart(ch) { + return (ch === 0x24) || (ch === 0x5F) || // $ (dollar) and _ (underscore) + (ch >= 0x41 && ch <= 0x5A) || // A..Z + (ch >= 0x61 && ch <= 0x7A) || // a..z + (ch >= 0x30 && ch <= 0x39) || // 0..9 + (ch === 0x5C) || // \ (backslash) + ((ch >= 0x80) && Regex.NonAsciiIdentifierPart.test(fromCodePoint(ch))); + } + + // ECMA-262 11.6.2.2 Future Reserved Words + + function isFutureReservedWord(id) { + switch (id) { + case 'enum': + case 'export': + case 'import': + case 'super': + return true; + default: + return false; + } + } + + function isStrictModeReservedWord(id) { + switch (id) { + case 'implements': + case 'interface': + case 'package': + case 'private': + case 'protected': + case 'public': + case 'static': + case 'yield': + case 'let': + return true; + default: + return false; + } + } + + function isRestrictedWord(id) { + return id === 'eval' || id === 'arguments'; + } + + // ECMA-262 11.6.2.1 Keywords + + function isKeyword(id) { + switch (id.length) { + case 2: + return (id === 'if') || (id === 'in') || (id === 'do'); + case 3: + return (id === 'var') || (id === 'for') || (id === 'new') || + (id === 'try') || (id === 'let'); + case 4: + return (id === 'this') || (id === 'else') || (id === 'case') || + (id === 'void') || (id === 'with') || (id === 'enum'); + case 5: + return (id === 'while') || (id === 'break') || (id === 'catch') || + (id === 'throw') || (id === 'const') || (id === 'yield') || + (id === 'class') || (id === 'super'); + case 6: + return (id === 'return') || (id === 'typeof') || (id === 'delete') || + (id === 'switch') || (id === 'export') || (id === 'import'); + case 7: + return (id === 'default') || (id === 'finally') || (id === 'extends'); + case 8: + return (id === 'function') || (id === 'continue') || (id === 'debugger'); + case 10: + return (id === 'instanceof'); + default: + return false; + } + } + + // ECMA-262 11.4 Comments + + function addComment(type, value, start, end, loc) { + var comment; + + assert(typeof start === 'number', 'Comment must have valid position'); + + state.lastCommentStart = start; + + comment = { + type: type, + value: value + }; + if (extra.range) { + comment.range = [start, end]; + } + if (extra.loc) { + comment.loc = loc; + } + extra.comments.push(comment); + if (extra.attachComment) { + extra.leadingComments.push(comment); + extra.trailingComments.push(comment); + } + if (extra.tokenize) { + comment.type = comment.type + 'Comment'; + if (extra.delegate) { + comment = extra.delegate(comment); + } + extra.tokens.push(comment); + } + } + + function skipSingleLineComment(offset) { + var start, loc, ch, comment; + + start = index - offset; + loc = { + start: { + line: lineNumber, + column: index - lineStart - offset + } + }; + + while (index < length) { + ch = source.charCodeAt(index); + ++index; + if (isLineTerminator(ch)) { + hasLineTerminator = true; + if (extra.comments) { + comment = source.slice(start + offset, index - 1); + loc.end = { + line: lineNumber, + column: index - lineStart - 1 + }; + addComment('Line', comment, start, index - 1, loc); + } + if (ch === 13 && source.charCodeAt(index) === 10) { + ++index; + } + ++lineNumber; + lineStart = index; + return; + } + } + + if (extra.comments) { + comment = source.slice(start + offset, index); + loc.end = { + line: lineNumber, + column: index - lineStart + }; + addComment('Line', comment, start, index, loc); + } + } + + function skipMultiLineComment() { + var start, loc, ch, comment; + + if (extra.comments) { + start = index - 2; + loc = { + start: { + line: lineNumber, + column: index - lineStart - 2 + } + }; + } + + while (index < length) { + ch = source.charCodeAt(index); + if (isLineTerminator(ch)) { + if (ch === 0x0D && source.charCodeAt(index + 1) === 0x0A) { + ++index; + } + hasLineTerminator = true; + ++lineNumber; + ++index; + lineStart = index; + } else if (ch === 0x2A) { + // Block comment ends with '*/'. + if (source.charCodeAt(index + 1) === 0x2F) { + ++index; + ++index; + if (extra.comments) { + comment = source.slice(start + 2, index - 2); + loc.end = { + line: lineNumber, + column: index - lineStart + }; + addComment('Block', comment, start, index, loc); + } + return; + } + ++index; + } else { + ++index; + } + } + + // Ran off the end of the file - the whole thing is a comment + if (extra.comments) { + loc.end = { + line: lineNumber, + column: index - lineStart + }; + comment = source.slice(start + 2, index); + addComment('Block', comment, start, index, loc); + } + tolerateUnexpectedToken(); + } + + function skipComment() { + var ch, start; + hasLineTerminator = false; + + start = (index === 0); + while (index < length) { + ch = source.charCodeAt(index); + + if (isWhiteSpace(ch)) { + ++index; + } else if (isLineTerminator(ch)) { + hasLineTerminator = true; + ++index; + if (ch === 0x0D && source.charCodeAt(index) === 0x0A) { + ++index; + } + ++lineNumber; + lineStart = index; + start = true; + } else if (ch === 0x2F) { // U+002F is '/' + ch = source.charCodeAt(index + 1); + if (ch === 0x2F) { + ++index; + ++index; + skipSingleLineComment(2); + start = true; + } else if (ch === 0x2A) { // U+002A is '*' + ++index; + ++index; + skipMultiLineComment(); + } else { + break; + } + } else if (start && ch === 0x2D) { // U+002D is '-' + // U+003E is '>' + if ((source.charCodeAt(index + 1) === 0x2D) && (source.charCodeAt(index + 2) === 0x3E)) { + // '-->' is a single-line comment + index += 3; + skipSingleLineComment(3); + } else { + break; + } + } else if (ch === 0x3C) { // U+003C is '<' + if (source.slice(index + 1, index + 4) === '!--') { + ++index; // `<` + ++index; // `!` + ++index; // `-` + ++index; // `-` + skipSingleLineComment(4); + } else { + break; + } + } else { + break; + } + } + } + + function scanHexEscape(prefix) { + var i, len, ch, code = 0; + + len = (prefix === 'u') ? 4 : 2; + for (i = 0; i < len; ++i) { + if (index < length && isHexDigit(source[index])) { + ch = source[index++]; + code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase()); + } else { + return ''; + } + } + return String.fromCharCode(code); + } + + function scanUnicodeCodePointEscape() { + var ch, code; + + ch = source[index]; + code = 0; + + // At least, one hex digit is required. + if (ch === '}') { + throwUnexpectedToken(); + } + + while (index < length) { + ch = source[index++]; + if (!isHexDigit(ch)) { + break; + } + code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase()); + } + + if (code > 0x10FFFF || ch !== '}') { + throwUnexpectedToken(); + } + + return fromCodePoint(code); + } + + function codePointAt(i) { + var cp, first, second; + + cp = source.charCodeAt(i); + if (cp >= 0xD800 && cp <= 0xDBFF) { + second = source.charCodeAt(i + 1); + if (second >= 0xDC00 && second <= 0xDFFF) { + first = cp; + cp = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000; + } + } + + return cp; + } + + function getComplexIdentifier() { + var cp, ch, id; + + cp = codePointAt(index); + id = fromCodePoint(cp); + index += id.length; + + // '\u' (U+005C, U+0075) denotes an escaped character. + if (cp === 0x5C) { + if (source.charCodeAt(index) !== 0x75) { + throwUnexpectedToken(); + } + ++index; + if (source[index] === '{') { + ++index; + ch = scanUnicodeCodePointEscape(); + } else { + ch = scanHexEscape('u'); + cp = ch.charCodeAt(0); + if (!ch || ch === '\\' || !isIdentifierStart(cp)) { + throwUnexpectedToken(); + } + } + id = ch; + } + + while (index < length) { + cp = codePointAt(index); + if (!isIdentifierPart(cp)) { + break; + } + ch = fromCodePoint(cp); + id += ch; + index += ch.length; + + // '\u' (U+005C, U+0075) denotes an escaped character. + if (cp === 0x5C) { + id = id.substr(0, id.length - 1); + if (source.charCodeAt(index) !== 0x75) { + throwUnexpectedToken(); + } + ++index; + if (source[index] === '{') { + ++index; + ch = scanUnicodeCodePointEscape(); + } else { + ch = scanHexEscape('u'); + cp = ch.charCodeAt(0); + if (!ch || ch === '\\' || !isIdentifierPart(cp)) { + throwUnexpectedToken(); + } + } + id += ch; + } + } + + return id; + } + + function getIdentifier() { + var start, ch; + + start = index++; + while (index < length) { + ch = source.charCodeAt(index); + if (ch === 0x5C) { + // Blackslash (U+005C) marks Unicode escape sequence. + index = start; + return getComplexIdentifier(); + } else if (ch >= 0xD800 && ch < 0xDFFF) { + // Need to handle surrogate pairs. + index = start; + return getComplexIdentifier(); + } + if (isIdentifierPart(ch)) { + ++index; + } else { + break; + } + } + + return source.slice(start, index); + } + + function scanIdentifier() { + var start, id, type; + + start = index; + + // Backslash (U+005C) starts an escaped character. + id = (source.charCodeAt(index) === 0x5C) ? getComplexIdentifier() : getIdentifier(); + + // There is no keyword or literal with only one character. + // Thus, it must be an identifier. + if (id.length === 1) { + type = Token.Identifier; + } else if (isKeyword(id)) { + type = Token.Keyword; + } else if (id === 'null') { + type = Token.NullLiteral; + } else if (id === 'true' || id === 'false') { + type = Token.BooleanLiteral; + } else { + type = Token.Identifier; + } + + return { + type: type, + value: id, + lineNumber: lineNumber, + lineStart: lineStart, + start: start, + end: index + }; + } + + + // ECMA-262 11.7 Punctuators + + function scanPunctuator() { + var token, str; + + token = { + type: Token.Punctuator, + value: '', + lineNumber: lineNumber, + lineStart: lineStart, + start: index, + end: index + }; + + // Check for most common single-character punctuators. + str = source[index]; + switch (str) { + + case '(': + if (extra.tokenize) { + extra.openParenToken = extra.tokenValues.length; + } + ++index; + break; + + case '{': + if (extra.tokenize) { + extra.openCurlyToken = extra.tokenValues.length; + } + state.curlyStack.push('{'); + ++index; + break; + + case '.': + ++index; + if (source[index] === '.' && source[index + 1] === '.') { + // Spread operator: ... + index += 2; + str = '...'; + } + break; + + case '}': + ++index; + state.curlyStack.pop(); + break; + case ')': + case ';': + case ',': + case '[': + case ']': + case ':': + case '?': + case '~': + ++index; + break; + + default: + // 4-character punctuator. + str = source.substr(index, 4); + if (str === '>>>=') { + index += 4; + } else { + + // 3-character punctuators. + str = str.substr(0, 3); + if (str === '===' || str === '!==' || str === '>>>' || + str === '<<=' || str === '>>=') { + index += 3; + } else { + + // 2-character punctuators. + str = str.substr(0, 2); + if (str === '&&' || str === '||' || str === '==' || str === '!=' || + str === '+=' || str === '-=' || str === '*=' || str === '/=' || + str === '++' || str === '--' || str === '<<' || str === '>>' || + str === '&=' || str === '|=' || str === '^=' || str === '%=' || + str === '<=' || str === '>=' || str === '=>') { + index += 2; + } else { + + // 1-character punctuators. + str = source[index]; + if ('<>=!+-*%&|^/'.indexOf(str) >= 0) { + ++index; + } + } + } + } + } + + if (index === token.start) { + throwUnexpectedToken(); + } + + token.end = index; + token.value = str; + return token; + } + + // ECMA-262 11.8.3 Numeric Literals + + function scanHexLiteral(start) { + var number = ''; + + while (index < length) { + if (!isHexDigit(source[index])) { + break; + } + number += source[index++]; + } + + if (number.length === 0) { + throwUnexpectedToken(); + } + + if (isIdentifierStart(source.charCodeAt(index))) { + throwUnexpectedToken(); + } + + return { + type: Token.NumericLiteral, + value: parseInt('0x' + number, 16), + lineNumber: lineNumber, + lineStart: lineStart, + start: start, + end: index + }; + } + + function scanBinaryLiteral(start) { + var ch, number; + + number = ''; + + while (index < length) { + ch = source[index]; + if (ch !== '0' && ch !== '1') { + break; + } + number += source[index++]; + } + + if (number.length === 0) { + // only 0b or 0B + throwUnexpectedToken(); + } + + if (index < length) { + ch = source.charCodeAt(index); + /* istanbul ignore else */ + if (isIdentifierStart(ch) || isDecimalDigit(ch)) { + throwUnexpectedToken(); + } + } + + return { + type: Token.NumericLiteral, + value: parseInt(number, 2), + lineNumber: lineNumber, + lineStart: lineStart, + start: start, + end: index + }; + } + + function scanOctalLiteral(prefix, start) { + var number, octal; + + if (isOctalDigit(prefix)) { + octal = true; + number = '0' + source[index++]; + } else { + octal = false; + ++index; + number = ''; + } + + while (index < length) { + if (!isOctalDigit(source[index])) { + break; + } + number += source[index++]; + } + + if (!octal && number.length === 0) { + // only 0o or 0O + throwUnexpectedToken(); + } + + if (isIdentifierStart(source.charCodeAt(index)) || isDecimalDigit(source.charCodeAt(index))) { + throwUnexpectedToken(); + } + + return { + type: Token.NumericLiteral, + value: parseInt(number, 8), + octal: octal, + lineNumber: lineNumber, + lineStart: lineStart, + start: start, + end: index + }; + } + + function isImplicitOctalLiteral() { + var i, ch; + + // Implicit octal, unless there is a non-octal digit. + // (Annex B.1.1 on Numeric Literals) + for (i = index + 1; i < length; ++i) { + ch = source[i]; + if (ch === '8' || ch === '9') { + return false; + } + if (!isOctalDigit(ch)) { + return true; + } + } + + return true; + } + + function scanNumericLiteral() { + var number, start, ch; + + ch = source[index]; + assert(isDecimalDigit(ch.charCodeAt(0)) || (ch === '.'), + 'Numeric literal must start with a decimal digit or a decimal point'); + + start = index; + number = ''; + if (ch !== '.') { + number = source[index++]; + ch = source[index]; + + // Hex number starts with '0x'. + // Octal number starts with '0'. + // Octal number in ES6 starts with '0o'. + // Binary number in ES6 starts with '0b'. + if (number === '0') { + if (ch === 'x' || ch === 'X') { + ++index; + return scanHexLiteral(start); + } + if (ch === 'b' || ch === 'B') { + ++index; + return scanBinaryLiteral(start); + } + if (ch === 'o' || ch === 'O') { + return scanOctalLiteral(ch, start); + } + + if (isOctalDigit(ch)) { + if (isImplicitOctalLiteral()) { + return scanOctalLiteral(ch, start); + } + } + } + + while (isDecimalDigit(source.charCodeAt(index))) { + number += source[index++]; + } + ch = source[index]; + } + + if (ch === '.') { + number += source[index++]; + while (isDecimalDigit(source.charCodeAt(index))) { + number += source[index++]; + } + ch = source[index]; + } + + if (ch === 'e' || ch === 'E') { + number += source[index++]; + + ch = source[index]; + if (ch === '+' || ch === '-') { + number += source[index++]; + } + if (isDecimalDigit(source.charCodeAt(index))) { + while (isDecimalDigit(source.charCodeAt(index))) { + number += source[index++]; + } + } else { + throwUnexpectedToken(); + } + } + + if (isIdentifierStart(source.charCodeAt(index))) { + throwUnexpectedToken(); + } + + return { + type: Token.NumericLiteral, + value: parseFloat(number), + lineNumber: lineNumber, + lineStart: lineStart, + start: start, + end: index + }; + } + + // ECMA-262 11.8.4 String Literals + + function scanStringLiteral() { + var str = '', quote, start, ch, unescaped, octToDec, octal = false; + + quote = source[index]; + assert((quote === '\'' || quote === '"'), + 'String literal must starts with a quote'); + + start = index; + ++index; + + while (index < length) { + ch = source[index++]; + + if (ch === quote) { + quote = ''; + break; + } else if (ch === '\\') { + ch = source[index++]; + if (!ch || !isLineTerminator(ch.charCodeAt(0))) { + switch (ch) { + case 'u': + case 'x': + if (source[index] === '{') { + ++index; + str += scanUnicodeCodePointEscape(); + } else { + unescaped = scanHexEscape(ch); + if (!unescaped) { + throw throwUnexpectedToken(); + } + str += unescaped; + } + break; + case 'n': + str += '\n'; + break; + case 'r': + str += '\r'; + break; + case 't': + str += '\t'; + break; + case 'b': + str += '\b'; + break; + case 'f': + str += '\f'; + break; + case 'v': + str += '\x0B'; + break; + case '8': + case '9': + str += ch; + tolerateUnexpectedToken(); + break; + + default: + if (isOctalDigit(ch)) { + octToDec = octalToDecimal(ch); + + octal = octToDec.octal || octal; + str += String.fromCharCode(octToDec.code); + } else { + str += ch; + } + break; + } + } else { + ++lineNumber; + if (ch === '\r' && source[index] === '\n') { + ++index; + } + lineStart = index; + } + } else if (isLineTerminator(ch.charCodeAt(0))) { + break; + } else { + str += ch; + } + } + + if (quote !== '') { + throwUnexpectedToken(); + } + + return { + type: Token.StringLiteral, + value: str, + octal: octal, + lineNumber: startLineNumber, + lineStart: startLineStart, + start: start, + end: index + }; + } + + // ECMA-262 11.8.6 Template Literal Lexical Components + + function scanTemplate() { + var cooked = '', ch, start, rawOffset, terminated, head, tail, restore, unescaped; + + terminated = false; + tail = false; + start = index; + head = (source[index] === '`'); + rawOffset = 2; + + ++index; + + while (index < length) { + ch = source[index++]; + if (ch === '`') { + rawOffset = 1; + tail = true; + terminated = true; + break; + } else if (ch === '$') { + if (source[index] === '{') { + state.curlyStack.push('${'); + ++index; + terminated = true; + break; + } + cooked += ch; + } else if (ch === '\\') { + ch = source[index++]; + if (!isLineTerminator(ch.charCodeAt(0))) { + switch (ch) { + case 'n': + cooked += '\n'; + break; + case 'r': + cooked += '\r'; + break; + case 't': + cooked += '\t'; + break; + case 'u': + case 'x': + if (source[index] === '{') { + ++index; + cooked += scanUnicodeCodePointEscape(); + } else { + restore = index; + unescaped = scanHexEscape(ch); + if (unescaped) { + cooked += unescaped; + } else { + index = restore; + cooked += ch; + } + } + break; + case 'b': + cooked += '\b'; + break; + case 'f': + cooked += '\f'; + break; + case 'v': + cooked += '\v'; + break; + + default: + if (ch === '0') { + if (isDecimalDigit(source.charCodeAt(index))) { + // Illegal: \01 \02 and so on + throwError(Messages.TemplateOctalLiteral); + } + cooked += '\0'; + } else if (isOctalDigit(ch)) { + // Illegal: \1 \2 + throwError(Messages.TemplateOctalLiteral); + } else { + cooked += ch; + } + break; + } + } else { + ++lineNumber; + if (ch === '\r' && source[index] === '\n') { + ++index; + } + lineStart = index; + } + } else if (isLineTerminator(ch.charCodeAt(0))) { + ++lineNumber; + if (ch === '\r' && source[index] === '\n') { + ++index; + } + lineStart = index; + cooked += '\n'; + } else { + cooked += ch; + } + } + + if (!terminated) { + throwUnexpectedToken(); + } + + if (!head) { + state.curlyStack.pop(); + } + + return { + type: Token.Template, + value: { + cooked: cooked, + raw: source.slice(start + 1, index - rawOffset) + }, + head: head, + tail: tail, + lineNumber: lineNumber, + lineStart: lineStart, + start: start, + end: index + }; + } + + // ECMA-262 11.8.5 Regular Expression Literals + + function testRegExp(pattern, flags) { + // The BMP character to use as a replacement for astral symbols when + // translating an ES6 "u"-flagged pattern to an ES5-compatible + // approximation. + // Note: replacing with '\uFFFF' enables false positives in unlikely + // scenarios. For example, `[\u{1044f}-\u{10440}]` is an invalid + // pattern that would not be detected by this substitution. + var astralSubstitute = '\uFFFF', + tmp = pattern; + + if (flags.indexOf('u') >= 0) { + tmp = tmp + // Replace every Unicode escape sequence with the equivalent + // BMP character or a constant ASCII code point in the case of + // astral symbols. (See the above note on `astralSubstitute` + // for more information.) + .replace(/\\u\{([0-9a-fA-F]+)\}|\\u([a-fA-F0-9]{4})/g, function ($0, $1, $2) { + var codePoint = parseInt($1 || $2, 16); + if (codePoint > 0x10FFFF) { + throwUnexpectedToken(null, Messages.InvalidRegExp); + } + if (codePoint <= 0xFFFF) { + return String.fromCharCode(codePoint); + } + return astralSubstitute; + }) + // Replace each paired surrogate with a single ASCII symbol to + // avoid throwing on regular expressions that are only valid in + // combination with the "u" flag. + .replace( + /[\uD800-\uDBFF][\uDC00-\uDFFF]/g, + astralSubstitute + ); + } + + // First, detect invalid regular expressions. + try { + RegExp(tmp); + } catch (e) { + throwUnexpectedToken(null, Messages.InvalidRegExp); + } + + // Return a regular expression object for this pattern-flag pair, or + // `null` in case the current environment doesn't support the flags it + // uses. + try { + return new RegExp(pattern, flags); + } catch (exception) { + return null; + } + } + + function scanRegExpBody() { + var ch, str, classMarker, terminated, body; + + ch = source[index]; + assert(ch === '/', 'Regular expression literal must start with a slash'); + str = source[index++]; + + classMarker = false; + terminated = false; + while (index < length) { + ch = source[index++]; + str += ch; + if (ch === '\\') { + ch = source[index++]; + // ECMA-262 7.8.5 + if (isLineTerminator(ch.charCodeAt(0))) { + throwUnexpectedToken(null, Messages.UnterminatedRegExp); + } + str += ch; + } else if (isLineTerminator(ch.charCodeAt(0))) { + throwUnexpectedToken(null, Messages.UnterminatedRegExp); + } else if (classMarker) { + if (ch === ']') { + classMarker = false; + } + } else { + if (ch === '/') { + terminated = true; + break; + } else if (ch === '[') { + classMarker = true; + } + } + } + + if (!terminated) { + throwUnexpectedToken(null, Messages.UnterminatedRegExp); + } + + // Exclude leading and trailing slash. + body = str.substr(1, str.length - 2); + return { + value: body, + literal: str + }; + } + + function scanRegExpFlags() { + var ch, str, flags, restore; + + str = ''; + flags = ''; + while (index < length) { + ch = source[index]; + if (!isIdentifierPart(ch.charCodeAt(0))) { + break; + } + + ++index; + if (ch === '\\' && index < length) { + ch = source[index]; + if (ch === 'u') { + ++index; + restore = index; + ch = scanHexEscape('u'); + if (ch) { + flags += ch; + for (str += '\\u'; restore < index; ++restore) { + str += source[restore]; + } + } else { + index = restore; + flags += 'u'; + str += '\\u'; + } + tolerateUnexpectedToken(); + } else { + str += '\\'; + tolerateUnexpectedToken(); + } + } else { + flags += ch; + str += ch; + } + } + + return { + value: flags, + literal: str + }; + } + + function scanRegExp() { + var start, body, flags, value; + scanning = true; + + lookahead = null; + skipComment(); + start = index; + + body = scanRegExpBody(); + flags = scanRegExpFlags(); + value = testRegExp(body.value, flags.value); + scanning = false; + if (extra.tokenize) { + return { + type: Token.RegularExpression, + value: value, + regex: { + pattern: body.value, + flags: flags.value + }, + lineNumber: lineNumber, + lineStart: lineStart, + start: start, + end: index + }; + } + + return { + literal: body.literal + flags.literal, + value: value, + regex: { + pattern: body.value, + flags: flags.value + }, + start: start, + end: index + }; + } + + function collectRegex() { + var pos, loc, regex, token; + + skipComment(); + + pos = index; + loc = { + start: { + line: lineNumber, + column: index - lineStart + } + }; + + regex = scanRegExp(); + + loc.end = { + line: lineNumber, + column: index - lineStart + }; + + /* istanbul ignore next */ + if (!extra.tokenize) { + // Pop the previous token, which is likely '/' or '/=' + if (extra.tokens.length > 0) { + token = extra.tokens[extra.tokens.length - 1]; + if (token.range[0] === pos && token.type === 'Punctuator') { + if (token.value === '/' || token.value === '/=') { + extra.tokens.pop(); + } + } + } + + extra.tokens.push({ + type: 'RegularExpression', + value: regex.literal, + regex: regex.regex, + range: [pos, index], + loc: loc + }); + } + + return regex; + } + + function isIdentifierName(token) { + return token.type === Token.Identifier || + token.type === Token.Keyword || + token.type === Token.BooleanLiteral || + token.type === Token.NullLiteral; + } + + // Using the following algorithm: + // https://github.com/mozilla/sweet.js/wiki/design + + function advanceSlash() { + var regex, previous, check; + + function testKeyword(value) { + return value && (value.length > 1) && (value[0] >= 'a') && (value[0] <= 'z'); + } + + previous = extra.tokenValues[extra.tokens.length - 1]; + regex = (previous !== null); + + switch (previous) { + case 'this': + case ']': + regex = false; + break; + + case ')': + check = extra.tokenValues[extra.openParenToken - 1]; + regex = (check === 'if' || check === 'while' || check === 'for' || check === 'with'); + break; + + case '}': + // Dividing a function by anything makes little sense, + // but we have to check for that. + regex = false; + if (testKeyword(extra.tokenValues[extra.openCurlyToken - 3])) { + // Anonymous function, e.g. function(){} /42 + check = extra.tokenValues[extra.openCurlyToken - 4]; + regex = check ? (FnExprTokens.indexOf(check) < 0) : false; + } else if (testKeyword(extra.tokenValues[extra.openCurlyToken - 4])) { + // Named function, e.g. function f(){} /42/ + check = extra.tokenValues[extra.openCurlyToken - 5]; + regex = check ? (FnExprTokens.indexOf(check) < 0) : true; + } + } + + return regex ? collectRegex() : scanPunctuator(); + } + + function advance() { + var cp, token; + + if (index >= length) { + return { + type: Token.EOF, + lineNumber: lineNumber, + lineStart: lineStart, + start: index, + end: index + }; + } + + cp = source.charCodeAt(index); + + if (isIdentifierStart(cp)) { + token = scanIdentifier(); + if (strict && isStrictModeReservedWord(token.value)) { + token.type = Token.Keyword; + } + return token; + } + + // Very common: ( and ) and ; + if (cp === 0x28 || cp === 0x29 || cp === 0x3B) { + return scanPunctuator(); + } + + // String literal starts with single quote (U+0027) or double quote (U+0022). + if (cp === 0x27 || cp === 0x22) { + return scanStringLiteral(); + } + + // Dot (.) U+002E can also start a floating-point number, hence the need + // to check the next character. + if (cp === 0x2E) { + if (isDecimalDigit(source.charCodeAt(index + 1))) { + return scanNumericLiteral(); + } + return scanPunctuator(); + } + + if (isDecimalDigit(cp)) { + return scanNumericLiteral(); + } + + // Slash (/) U+002F can also start a regex. + if (extra.tokenize && cp === 0x2F) { + return advanceSlash(); + } + + // Template literals start with ` (U+0060) for template head + // or } (U+007D) for template middle or template tail. + if (cp === 0x60 || (cp === 0x7D && state.curlyStack[state.curlyStack.length - 1] === '${')) { + return scanTemplate(); + } + + // Possible identifier start in a surrogate pair. + if (cp >= 0xD800 && cp < 0xDFFF) { + cp = codePointAt(index); + if (isIdentifierStart(cp)) { + return scanIdentifier(); + } + } + + return scanPunctuator(); + } + + function collectToken() { + var loc, token, value, entry; + + loc = { + start: { + line: lineNumber, + column: index - lineStart + } + }; + + token = advance(); + loc.end = { + line: lineNumber, + column: index - lineStart + }; + + if (token.type !== Token.EOF) { + value = source.slice(token.start, token.end); + entry = { + type: TokenName[token.type], + value: value, + range: [token.start, token.end], + loc: loc + }; + if (token.regex) { + entry.regex = { + pattern: token.regex.pattern, + flags: token.regex.flags + }; + } + if (extra.tokenValues) { + extra.tokenValues.push((entry.type === 'Punctuator' || entry.type === 'Keyword') ? entry.value : null); + } + if (extra.tokenize) { + if (!extra.range) { + delete entry.range; + } + if (!extra.loc) { + delete entry.loc; + } + if (extra.delegate) { + entry = extra.delegate(entry); + } + } + extra.tokens.push(entry); + } + + return token; + } + + function lex() { + var token; + scanning = true; + + lastIndex = index; + lastLineNumber = lineNumber; + lastLineStart = lineStart; + + skipComment(); + + token = lookahead; + + startIndex = index; + startLineNumber = lineNumber; + startLineStart = lineStart; + + lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance(); + scanning = false; + return token; + } + + function peek() { + scanning = true; + + skipComment(); + + lastIndex = index; + lastLineNumber = lineNumber; + lastLineStart = lineStart; + + startIndex = index; + startLineNumber = lineNumber; + startLineStart = lineStart; + + lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance(); + scanning = false; + } + + function Position() { + this.line = startLineNumber; + this.column = startIndex - startLineStart; + } + + function SourceLocation() { + this.start = new Position(); + this.end = null; + } + + function WrappingSourceLocation(startToken) { + this.start = { + line: startToken.lineNumber, + column: startToken.start - startToken.lineStart + }; + this.end = null; + } + + function Node() { + if (extra.range) { + this.range = [startIndex, 0]; + } + if (extra.loc) { + this.loc = new SourceLocation(); + } + } + + function WrappingNode(startToken) { + if (extra.range) { + this.range = [startToken.start, 0]; + } + if (extra.loc) { + this.loc = new WrappingSourceLocation(startToken); + } + } + + WrappingNode.prototype = Node.prototype = { + + processComment: function () { + var lastChild, + innerComments, + leadingComments, + trailingComments, + bottomRight = extra.bottomRightStack, + i, + comment, + last = bottomRight[bottomRight.length - 1]; + + if (this.type === Syntax.Program) { + if (this.body.length > 0) { + return; + } + } + /** + * patch innnerComments for properties empty block + * `function a() {/** comments **\/}` + */ + + if (this.type === Syntax.BlockStatement && this.body.length === 0) { + innerComments = []; + for (i = extra.leadingComments.length - 1; i >= 0; --i) { + comment = extra.leadingComments[i]; + if (this.range[1] >= comment.range[1]) { + innerComments.unshift(comment); + extra.leadingComments.splice(i, 1); + extra.trailingComments.splice(i, 1); + } + } + if (innerComments.length) { + this.innerComments = innerComments; + //bottomRight.push(this); + return; + } + } + + if (extra.trailingComments.length > 0) { + trailingComments = []; + for (i = extra.trailingComments.length - 1; i >= 0; --i) { + comment = extra.trailingComments[i]; + if (comment.range[0] >= this.range[1]) { + trailingComments.unshift(comment); + extra.trailingComments.splice(i, 1); + } + } + extra.trailingComments = []; + } else { + if (last && last.trailingComments && last.trailingComments[0].range[0] >= this.range[1]) { + trailingComments = last.trailingComments; + delete last.trailingComments; + } + } + + // Eating the stack. + while (last && last.range[0] >= this.range[0]) { + lastChild = bottomRight.pop(); + last = bottomRight[bottomRight.length - 1]; + } + + if (lastChild) { + if (lastChild.leadingComments) { + leadingComments = []; + for (i = lastChild.leadingComments.length - 1; i >= 0; --i) { + comment = lastChild.leadingComments[i]; + if (comment.range[1] <= this.range[0]) { + leadingComments.unshift(comment); + lastChild.leadingComments.splice(i, 1); + } + } + + if (!lastChild.leadingComments.length) { + lastChild.leadingComments = undefined; + } + } + } else if (extra.leadingComments.length > 0) { + leadingComments = []; + for (i = extra.leadingComments.length - 1; i >= 0; --i) { + comment = extra.leadingComments[i]; + if (comment.range[1] <= this.range[0]) { + leadingComments.unshift(comment); + extra.leadingComments.splice(i, 1); + } + } + } + + + if (leadingComments && leadingComments.length > 0) { + this.leadingComments = leadingComments; + } + if (trailingComments && trailingComments.length > 0) { + this.trailingComments = trailingComments; + } + + bottomRight.push(this); + }, + + finish: function () { + if (extra.range) { + this.range[1] = lastIndex; + } + if (extra.loc) { + this.loc.end = { + line: lastLineNumber, + column: lastIndex - lastLineStart + }; + if (extra.source) { + this.loc.source = extra.source; + } + } + + if (extra.attachComment) { + this.processComment(); + } + }, + + finishArrayExpression: function (elements) { + this.type = Syntax.ArrayExpression; + this.elements = elements; + this.finish(); + return this; + }, + + finishArrayPattern: function (elements) { + this.type = Syntax.ArrayPattern; + this.elements = elements; + this.finish(); + return this; + }, + + finishArrowFunctionExpression: function (params, defaults, body, expression) { + this.type = Syntax.ArrowFunctionExpression; + this.id = null; + this.params = params; + this.defaults = defaults; + this.body = body; + this.generator = false; + this.expression = expression; + this.finish(); + return this; + }, + + finishAssignmentExpression: function (operator, left, right) { + this.type = Syntax.AssignmentExpression; + this.operator = operator; + this.left = left; + this.right = right; + this.finish(); + return this; + }, + + finishAssignmentPattern: function (left, right) { + this.type = Syntax.AssignmentPattern; + this.left = left; + this.right = right; + this.finish(); + return this; + }, + + finishBinaryExpression: function (operator, left, right) { + this.type = (operator === '||' || operator === '&&') ? Syntax.LogicalExpression : Syntax.BinaryExpression; + this.operator = operator; + this.left = left; + this.right = right; + this.finish(); + return this; + }, + + finishBlockStatement: function (body) { + this.type = Syntax.BlockStatement; + this.body = body; + this.finish(); + return this; + }, + + finishBreakStatement: function (label) { + this.type = Syntax.BreakStatement; + this.label = label; + this.finish(); + return this; + }, + + finishCallExpression: function (callee, args) { + this.type = Syntax.CallExpression; + this.callee = callee; + this.arguments = args; + this.finish(); + return this; + }, + + finishCatchClause: function (param, body) { + this.type = Syntax.CatchClause; + this.param = param; + this.body = body; + this.finish(); + return this; + }, + + finishClassBody: function (body) { + this.type = Syntax.ClassBody; + this.body = body; + this.finish(); + return this; + }, + + finishClassDeclaration: function (id, superClass, body) { + this.type = Syntax.ClassDeclaration; + this.id = id; + this.superClass = superClass; + this.body = body; + this.finish(); + return this; + }, + + finishClassExpression: function (id, superClass, body) { + this.type = Syntax.ClassExpression; + this.id = id; + this.superClass = superClass; + this.body = body; + this.finish(); + return this; + }, + + finishConditionalExpression: function (test, consequent, alternate) { + this.type = Syntax.ConditionalExpression; + this.test = test; + this.consequent = consequent; + this.alternate = alternate; + this.finish(); + return this; + }, + + finishContinueStatement: function (label) { + this.type = Syntax.ContinueStatement; + this.label = label; + this.finish(); + return this; + }, + + finishDebuggerStatement: function () { + this.type = Syntax.DebuggerStatement; + this.finish(); + return this; + }, + + finishDoWhileStatement: function (body, test) { + this.type = Syntax.DoWhileStatement; + this.body = body; + this.test = test; + this.finish(); + return this; + }, + + finishEmptyStatement: function () { + this.type = Syntax.EmptyStatement; + this.finish(); + return this; + }, + + finishExpressionStatement: function (expression) { + this.type = Syntax.ExpressionStatement; + this.expression = expression; + this.finish(); + return this; + }, + + finishForStatement: function (init, test, update, body) { + this.type = Syntax.ForStatement; + this.init = init; + this.test = test; + this.update = update; + this.body = body; + this.finish(); + return this; + }, + + finishForOfStatement: function (left, right, body) { + this.type = Syntax.ForOfStatement; + this.left = left; + this.right = right; + this.body = body; + this.finish(); + return this; + }, + + finishForInStatement: function (left, right, body) { + this.type = Syntax.ForInStatement; + this.left = left; + this.right = right; + this.body = body; + this.each = false; + this.finish(); + return this; + }, + + finishFunctionDeclaration: function (id, params, defaults, body, generator) { + this.type = Syntax.FunctionDeclaration; + this.id = id; + this.params = params; + this.defaults = defaults; + this.body = body; + this.generator = generator; + this.expression = false; + this.finish(); + return this; + }, + + finishFunctionExpression: function (id, params, defaults, body, generator) { + this.type = Syntax.FunctionExpression; + this.id = id; + this.params = params; + this.defaults = defaults; + this.body = body; + this.generator = generator; + this.expression = false; + this.finish(); + return this; + }, + + finishIdentifier: function (name) { + this.type = Syntax.Identifier; + this.name = name; + this.finish(); + return this; + }, + + finishIfStatement: function (test, consequent, alternate) { + this.type = Syntax.IfStatement; + this.test = test; + this.consequent = consequent; + this.alternate = alternate; + this.finish(); + return this; + }, + + finishLabeledStatement: function (label, body) { + this.type = Syntax.LabeledStatement; + this.label = label; + this.body = body; + this.finish(); + return this; + }, + + finishLiteral: function (token) { + this.type = Syntax.Literal; + this.value = token.value; + this.raw = source.slice(token.start, token.end); + if (token.regex) { + this.regex = token.regex; + } + this.finish(); + return this; + }, + + finishMemberExpression: function (accessor, object, property) { + this.type = Syntax.MemberExpression; + this.computed = accessor === '['; + this.object = object; + this.property = property; + this.finish(); + return this; + }, + + finishMetaProperty: function (meta, property) { + this.type = Syntax.MetaProperty; + this.meta = meta; + this.property = property; + this.finish(); + return this; + }, + + finishNewExpression: function (callee, args) { + this.type = Syntax.NewExpression; + this.callee = callee; + this.arguments = args; + this.finish(); + return this; + }, + + finishObjectExpression: function (properties) { + this.type = Syntax.ObjectExpression; + this.properties = properties; + this.finish(); + return this; + }, + + finishObjectPattern: function (properties) { + this.type = Syntax.ObjectPattern; + this.properties = properties; + this.finish(); + return this; + }, + + finishPostfixExpression: function (operator, argument) { + this.type = Syntax.UpdateExpression; + this.operator = operator; + this.argument = argument; + this.prefix = false; + this.finish(); + return this; + }, + + finishProgram: function (body, sourceType) { + this.type = Syntax.Program; + this.body = body; + this.sourceType = sourceType; + this.finish(); + return this; + }, + + finishProperty: function (kind, key, computed, value, method, shorthand) { + this.type = Syntax.Property; + this.key = key; + this.computed = computed; + this.value = value; + this.kind = kind; + this.method = method; + this.shorthand = shorthand; + this.finish(); + return this; + }, + + finishRestElement: function (argument) { + this.type = Syntax.RestElement; + this.argument = argument; + this.finish(); + return this; + }, + + finishReturnStatement: function (argument) { + this.type = Syntax.ReturnStatement; + this.argument = argument; + this.finish(); + return this; + }, + + finishSequenceExpression: function (expressions) { + this.type = Syntax.SequenceExpression; + this.expressions = expressions; + this.finish(); + return this; + }, + + finishSpreadElement: function (argument) { + this.type = Syntax.SpreadElement; + this.argument = argument; + this.finish(); + return this; + }, + + finishSwitchCase: function (test, consequent) { + this.type = Syntax.SwitchCase; + this.test = test; + this.consequent = consequent; + this.finish(); + return this; + }, + + finishSuper: function () { + this.type = Syntax.Super; + this.finish(); + return this; + }, + + finishSwitchStatement: function (discriminant, cases) { + this.type = Syntax.SwitchStatement; + this.discriminant = discriminant; + this.cases = cases; + this.finish(); + return this; + }, + + finishTaggedTemplateExpression: function (tag, quasi) { + this.type = Syntax.TaggedTemplateExpression; + this.tag = tag; + this.quasi = quasi; + this.finish(); + return this; + }, + + finishTemplateElement: function (value, tail) { + this.type = Syntax.TemplateElement; + this.value = value; + this.tail = tail; + this.finish(); + return this; + }, + + finishTemplateLiteral: function (quasis, expressions) { + this.type = Syntax.TemplateLiteral; + this.quasis = quasis; + this.expressions = expressions; + this.finish(); + return this; + }, + + finishThisExpression: function () { + this.type = Syntax.ThisExpression; + this.finish(); + return this; + }, + + finishThrowStatement: function (argument) { + this.type = Syntax.ThrowStatement; + this.argument = argument; + this.finish(); + return this; + }, + + finishTryStatement: function (block, handler, finalizer) { + this.type = Syntax.TryStatement; + this.block = block; + this.guardedHandlers = []; + this.handlers = handler ? [handler] : []; + this.handler = handler; + this.finalizer = finalizer; + this.finish(); + return this; + }, + + finishUnaryExpression: function (operator, argument) { + this.type = (operator === '++' || operator === '--') ? Syntax.UpdateExpression : Syntax.UnaryExpression; + this.operator = operator; + this.argument = argument; + this.prefix = true; + this.finish(); + return this; + }, + + finishVariableDeclaration: function (declarations) { + this.type = Syntax.VariableDeclaration; + this.declarations = declarations; + this.kind = 'var'; + this.finish(); + return this; + }, + + finishLexicalDeclaration: function (declarations, kind) { + this.type = Syntax.VariableDeclaration; + this.declarations = declarations; + this.kind = kind; + this.finish(); + return this; + }, + + finishVariableDeclarator: function (id, init) { + this.type = Syntax.VariableDeclarator; + this.id = id; + this.init = init; + this.finish(); + return this; + }, + + finishWhileStatement: function (test, body) { + this.type = Syntax.WhileStatement; + this.test = test; + this.body = body; + this.finish(); + return this; + }, + + finishWithStatement: function (object, body) { + this.type = Syntax.WithStatement; + this.object = object; + this.body = body; + this.finish(); + return this; + }, + + finishExportSpecifier: function (local, exported) { + this.type = Syntax.ExportSpecifier; + this.exported = exported || local; + this.local = local; + this.finish(); + return this; + }, + + finishImportDefaultSpecifier: function (local) { + this.type = Syntax.ImportDefaultSpecifier; + this.local = local; + this.finish(); + return this; + }, + + finishImportNamespaceSpecifier: function (local) { + this.type = Syntax.ImportNamespaceSpecifier; + this.local = local; + this.finish(); + return this; + }, + + finishExportNamedDeclaration: function (declaration, specifiers, src) { + this.type = Syntax.ExportNamedDeclaration; + this.declaration = declaration; + this.specifiers = specifiers; + this.source = src; + this.finish(); + return this; + }, + + finishExportDefaultDeclaration: function (declaration) { + this.type = Syntax.ExportDefaultDeclaration; + this.declaration = declaration; + this.finish(); + return this; + }, + + finishExportAllDeclaration: function (src) { + this.type = Syntax.ExportAllDeclaration; + this.source = src; + this.finish(); + return this; + }, + + finishImportSpecifier: function (local, imported) { + this.type = Syntax.ImportSpecifier; + this.local = local || imported; + this.imported = imported; + this.finish(); + return this; + }, + + finishImportDeclaration: function (specifiers, src) { + this.type = Syntax.ImportDeclaration; + this.specifiers = specifiers; + this.source = src; + this.finish(); + return this; + }, + + finishYieldExpression: function (argument, delegate) { + this.type = Syntax.YieldExpression; + this.argument = argument; + this.delegate = delegate; + this.finish(); + return this; + } + }; + + + function recordError(error) { + var e, existing; + + for (e = 0; e < extra.errors.length; e++) { + existing = extra.errors[e]; + // Prevent duplicated error. + /* istanbul ignore next */ + if (existing.index === error.index && existing.message === error.message) { + return; + } + } + + extra.errors.push(error); + } + + function constructError(msg, column) { + var error = new Error(msg); + try { + throw error; + } catch (base) { + /* istanbul ignore else */ + if (Object.create && Object.defineProperty) { + error = Object.create(base); + Object.defineProperty(error, 'column', { value: column }); + } + } finally { + return error; + } + } + + function createError(line, pos, description) { + var msg, column, error; + + msg = 'Line ' + line + ': ' + description; + column = pos - (scanning ? lineStart : lastLineStart) + 1; + error = constructError(msg, column); + error.lineNumber = line; + error.description = description; + error.index = pos; + return error; + } + + // Throw an exception + + function throwError(messageFormat) { + var args, msg; + + args = Array.prototype.slice.call(arguments, 1); + msg = messageFormat.replace(/%(\d)/g, + function (whole, idx) { + assert(idx < args.length, 'Message reference must be in range'); + return args[idx]; + } + ); + + throw createError(lastLineNumber, lastIndex, msg); + } + + function tolerateError(messageFormat) { + var args, msg, error; + + args = Array.prototype.slice.call(arguments, 1); + /* istanbul ignore next */ + msg = messageFormat.replace(/%(\d)/g, + function (whole, idx) { + assert(idx < args.length, 'Message reference must be in range'); + return args[idx]; + } + ); + + error = createError(lineNumber, lastIndex, msg); + if (extra.errors) { + recordError(error); + } else { + throw error; + } + } + + // Throw an exception because of the token. + + function unexpectedTokenError(token, message) { + var value, msg = message || Messages.UnexpectedToken; + + if (token) { + if (!message) { + msg = (token.type === Token.EOF) ? Messages.UnexpectedEOS : + (token.type === Token.Identifier) ? Messages.UnexpectedIdentifier : + (token.type === Token.NumericLiteral) ? Messages.UnexpectedNumber : + (token.type === Token.StringLiteral) ? Messages.UnexpectedString : + (token.type === Token.Template) ? Messages.UnexpectedTemplate : + Messages.UnexpectedToken; + + if (token.type === Token.Keyword) { + if (isFutureReservedWord(token.value)) { + msg = Messages.UnexpectedReserved; + } else if (strict && isStrictModeReservedWord(token.value)) { + msg = Messages.StrictReservedWord; + } + } + } + + value = (token.type === Token.Template) ? token.value.raw : token.value; + } else { + value = 'ILLEGAL'; + } + + msg = msg.replace('%0', value); + + return (token && typeof token.lineNumber === 'number') ? + createError(token.lineNumber, token.start, msg) : + createError(scanning ? lineNumber : lastLineNumber, scanning ? index : lastIndex, msg); + } + + function throwUnexpectedToken(token, message) { + throw unexpectedTokenError(token, message); + } + + function tolerateUnexpectedToken(token, message) { + var error = unexpectedTokenError(token, message); + if (extra.errors) { + recordError(error); + } else { + throw error; + } + } + + // Expect the next token to match the specified punctuator. + // If not, an exception will be thrown. + + function expect(value) { + var token = lex(); + if (token.type !== Token.Punctuator || token.value !== value) { + throwUnexpectedToken(token); + } + } + + /** + * @name expectCommaSeparator + * @description Quietly expect a comma when in tolerant mode, otherwise delegates + * to expect(value) + * @since 2.0 + */ + function expectCommaSeparator() { + var token; + + if (extra.errors) { + token = lookahead; + if (token.type === Token.Punctuator && token.value === ',') { + lex(); + } else if (token.type === Token.Punctuator && token.value === ';') { + lex(); + tolerateUnexpectedToken(token); + } else { + tolerateUnexpectedToken(token, Messages.UnexpectedToken); + } + } else { + expect(','); + } + } + + // Expect the next token to match the specified keyword. + // If not, an exception will be thrown. + + function expectKeyword(keyword) { + var token = lex(); + if (token.type !== Token.Keyword || token.value !== keyword) { + throwUnexpectedToken(token); + } + } + + // Return true if the next token matches the specified punctuator. + + function match(value) { + return lookahead.type === Token.Punctuator && lookahead.value === value; + } + + // Return true if the next token matches the specified keyword + + function matchKeyword(keyword) { + return lookahead.type === Token.Keyword && lookahead.value === keyword; + } + + // Return true if the next token matches the specified contextual keyword + // (where an identifier is sometimes a keyword depending on the context) + + function matchContextualKeyword(keyword) { + return lookahead.type === Token.Identifier && lookahead.value === keyword; + } + + // Return true if the next token is an assignment operator + + function matchAssign() { + var op; + + if (lookahead.type !== Token.Punctuator) { + return false; + } + op = lookahead.value; + return op === '=' || + op === '*=' || + op === '/=' || + op === '%=' || + op === '+=' || + op === '-=' || + op === '<<=' || + op === '>>=' || + op === '>>>=' || + op === '&=' || + op === '^=' || + op === '|='; + } + + function consumeSemicolon() { + // Catch the very common case first: immediately a semicolon (U+003B). + if (source.charCodeAt(startIndex) === 0x3B || match(';')) { + lex(); + return; + } + + if (hasLineTerminator) { + return; + } + + // FIXME(ikarienator): this is seemingly an issue in the previous location info convention. + lastIndex = startIndex; + lastLineNumber = startLineNumber; + lastLineStart = startLineStart; + + if (lookahead.type !== Token.EOF && !match('}')) { + throwUnexpectedToken(lookahead); + } + } + + // Cover grammar support. + // + // When an assignment expression position starts with an left parenthesis, the determination of the type + // of the syntax is to be deferred arbitrarily long until the end of the parentheses pair (plus a lookahead) + // or the first comma. This situation also defers the determination of all the expressions nested in the pair. + // + // There are three productions that can be parsed in a parentheses pair that needs to be determined + // after the outermost pair is closed. They are: + // + // 1. AssignmentExpression + // 2. BindingElements + // 3. AssignmentTargets + // + // In order to avoid exponential backtracking, we use two flags to denote if the production can be + // binding element or assignment target. + // + // The three productions have the relationship: + // + // BindingElements ⊆ AssignmentTargets ⊆ AssignmentExpression + // + // with a single exception that CoverInitializedName when used directly in an Expression, generates + // an early error. Therefore, we need the third state, firstCoverInitializedNameError, to track the + // first usage of CoverInitializedName and report it when we reached the end of the parentheses pair. + // + // isolateCoverGrammar function runs the given parser function with a new cover grammar context, and it does not + // effect the current flags. This means the production the parser parses is only used as an expression. Therefore + // the CoverInitializedName check is conducted. + // + // inheritCoverGrammar function runs the given parse function with a new cover grammar context, and it propagates + // the flags outside of the parser. This means the production the parser parses is used as a part of a potential + // pattern. The CoverInitializedName check is deferred. + function isolateCoverGrammar(parser) { + var oldIsBindingElement = isBindingElement, + oldIsAssignmentTarget = isAssignmentTarget, + oldFirstCoverInitializedNameError = firstCoverInitializedNameError, + result; + isBindingElement = true; + isAssignmentTarget = true; + firstCoverInitializedNameError = null; + result = parser(); + if (firstCoverInitializedNameError !== null) { + throwUnexpectedToken(firstCoverInitializedNameError); + } + isBindingElement = oldIsBindingElement; + isAssignmentTarget = oldIsAssignmentTarget; + firstCoverInitializedNameError = oldFirstCoverInitializedNameError; + return result; + } + + function inheritCoverGrammar(parser) { + var oldIsBindingElement = isBindingElement, + oldIsAssignmentTarget = isAssignmentTarget, + oldFirstCoverInitializedNameError = firstCoverInitializedNameError, + result; + isBindingElement = true; + isAssignmentTarget = true; + firstCoverInitializedNameError = null; + result = parser(); + isBindingElement = isBindingElement && oldIsBindingElement; + isAssignmentTarget = isAssignmentTarget && oldIsAssignmentTarget; + firstCoverInitializedNameError = oldFirstCoverInitializedNameError || firstCoverInitializedNameError; + return result; + } + + // ECMA-262 13.3.3 Destructuring Binding Patterns + + function parseArrayPattern(params, kind) { + var node = new Node(), elements = [], rest, restNode; + expect('['); + + while (!match(']')) { + if (match(',')) { + lex(); + elements.push(null); + } else { + if (match('...')) { + restNode = new Node(); + lex(); + params.push(lookahead); + rest = parseVariableIdentifier(kind); + elements.push(restNode.finishRestElement(rest)); + break; + } else { + elements.push(parsePatternWithDefault(params, kind)); + } + if (!match(']')) { + expect(','); + } + } + + } + + expect(']'); + + return node.finishArrayPattern(elements); + } + + function parsePropertyPattern(params, kind) { + var node = new Node(), key, keyToken, computed = match('['), init; + if (lookahead.type === Token.Identifier) { + keyToken = lookahead; + key = parseVariableIdentifier(); + if (match('=')) { + params.push(keyToken); + lex(); + init = parseAssignmentExpression(); + + return node.finishProperty( + 'init', key, false, + new WrappingNode(keyToken).finishAssignmentPattern(key, init), false, false); + } else if (!match(':')) { + params.push(keyToken); + return node.finishProperty('init', key, false, key, false, true); + } + } else { + key = parseObjectPropertyKey(); + } + expect(':'); + init = parsePatternWithDefault(params, kind); + return node.finishProperty('init', key, computed, init, false, false); + } + + function parseObjectPattern(params, kind) { + var node = new Node(), properties = []; + + expect('{'); + + while (!match('}')) { + properties.push(parsePropertyPattern(params, kind)); + if (!match('}')) { + expect(','); + } + } + + lex(); + + return node.finishObjectPattern(properties); + } + + function parsePattern(params, kind) { + if (match('[')) { + return parseArrayPattern(params, kind); + } else if (match('{')) { + return parseObjectPattern(params, kind); + } else if (matchKeyword('let')) { + if (kind === 'const' || kind === 'let') { + tolerateUnexpectedToken(lookahead, Messages.UnexpectedToken); + } + } + + params.push(lookahead); + return parseVariableIdentifier(kind); + } + + function parsePatternWithDefault(params, kind) { + var startToken = lookahead, pattern, previousAllowYield, right; + pattern = parsePattern(params, kind); + if (match('=')) { + lex(); + previousAllowYield = state.allowYield; + state.allowYield = true; + right = isolateCoverGrammar(parseAssignmentExpression); + state.allowYield = previousAllowYield; + pattern = new WrappingNode(startToken).finishAssignmentPattern(pattern, right); + } + return pattern; + } + + // ECMA-262 12.2.5 Array Initializer + + function parseArrayInitializer() { + var elements = [], node = new Node(), restSpread; + + expect('['); + + while (!match(']')) { + if (match(',')) { + lex(); + elements.push(null); + } else if (match('...')) { + restSpread = new Node(); + lex(); + restSpread.finishSpreadElement(inheritCoverGrammar(parseAssignmentExpression)); + + if (!match(']')) { + isAssignmentTarget = isBindingElement = false; + expect(','); + } + elements.push(restSpread); + } else { + elements.push(inheritCoverGrammar(parseAssignmentExpression)); + + if (!match(']')) { + expect(','); + } + } + } + + lex(); + + return node.finishArrayExpression(elements); + } + + // ECMA-262 12.2.6 Object Initializer + + function parsePropertyFunction(node, paramInfo, isGenerator) { + var previousStrict, body; + + isAssignmentTarget = isBindingElement = false; + + previousStrict = strict; + body = isolateCoverGrammar(parseFunctionSourceElements); + + if (strict && paramInfo.firstRestricted) { + tolerateUnexpectedToken(paramInfo.firstRestricted, paramInfo.message); + } + if (strict && paramInfo.stricted) { + tolerateUnexpectedToken(paramInfo.stricted, paramInfo.message); + } + + strict = previousStrict; + return node.finishFunctionExpression(null, paramInfo.params, paramInfo.defaults, body, isGenerator); + } + + function parsePropertyMethodFunction() { + var params, method, node = new Node(), + previousAllowYield = state.allowYield; + + state.allowYield = false; + params = parseParams(); + state.allowYield = previousAllowYield; + + state.allowYield = false; + method = parsePropertyFunction(node, params, false); + state.allowYield = previousAllowYield; + + return method; + } + + function parseObjectPropertyKey() { + var token, node = new Node(), expr; + + token = lex(); + + // Note: This function is called only from parseObjectProperty(), where + // EOF and Punctuator tokens are already filtered out. + + switch (token.type) { + case Token.StringLiteral: + case Token.NumericLiteral: + if (strict && token.octal) { + tolerateUnexpectedToken(token, Messages.StrictOctalLiteral); + } + return node.finishLiteral(token); + case Token.Identifier: + case Token.BooleanLiteral: + case Token.NullLiteral: + case Token.Keyword: + return node.finishIdentifier(token.value); + case Token.Punctuator: + if (token.value === '[') { + expr = isolateCoverGrammar(parseAssignmentExpression); + expect(']'); + return expr; + } + break; + } + throwUnexpectedToken(token); + } + + function lookaheadPropertyName() { + switch (lookahead.type) { + case Token.Identifier: + case Token.StringLiteral: + case Token.BooleanLiteral: + case Token.NullLiteral: + case Token.NumericLiteral: + case Token.Keyword: + return true; + case Token.Punctuator: + return lookahead.value === '['; + } + return false; + } + + // This function is to try to parse a MethodDefinition as defined in 14.3. But in the case of object literals, + // it might be called at a position where there is in fact a short hand identifier pattern or a data property. + // This can only be determined after we consumed up to the left parentheses. + // + // In order to avoid back tracking, it returns `null` if the position is not a MethodDefinition and the caller + // is responsible to visit other options. + function tryParseMethodDefinition(token, key, computed, node) { + var value, options, methodNode, params, + previousAllowYield = state.allowYield; + + if (token.type === Token.Identifier) { + // check for `get` and `set`; + + if (token.value === 'get' && lookaheadPropertyName()) { + computed = match('['); + key = parseObjectPropertyKey(); + methodNode = new Node(); + expect('('); + expect(')'); + + state.allowYield = false; + value = parsePropertyFunction(methodNode, { + params: [], + defaults: [], + stricted: null, + firstRestricted: null, + message: null + }, false); + state.allowYield = previousAllowYield; + + return node.finishProperty('get', key, computed, value, false, false); + } else if (token.value === 'set' && lookaheadPropertyName()) { + computed = match('['); + key = parseObjectPropertyKey(); + methodNode = new Node(); + expect('('); + + options = { + params: [], + defaultCount: 0, + defaults: [], + firstRestricted: null, + paramSet: {} + }; + if (match(')')) { + tolerateUnexpectedToken(lookahead); + } else { + state.allowYield = false; + parseParam(options); + state.allowYield = previousAllowYield; + if (options.defaultCount === 0) { + options.defaults = []; + } + } + expect(')'); + + state.allowYield = false; + value = parsePropertyFunction(methodNode, options, false); + state.allowYield = previousAllowYield; + + return node.finishProperty('set', key, computed, value, false, false); + } + } else if (token.type === Token.Punctuator && token.value === '*' && lookaheadPropertyName()) { + computed = match('['); + key = parseObjectPropertyKey(); + methodNode = new Node(); + + state.allowYield = true; + params = parseParams(); + state.allowYield = previousAllowYield; + + state.allowYield = false; + value = parsePropertyFunction(methodNode, params, true); + state.allowYield = previousAllowYield; + + return node.finishProperty('init', key, computed, value, true, false); + } + + if (key && match('(')) { + value = parsePropertyMethodFunction(); + return node.finishProperty('init', key, computed, value, true, false); + } + + // Not a MethodDefinition. + return null; + } + + function parseObjectProperty(hasProto) { + var token = lookahead, node = new Node(), computed, key, maybeMethod, proto, value; + + computed = match('['); + if (match('*')) { + lex(); + } else { + key = parseObjectPropertyKey(); + } + maybeMethod = tryParseMethodDefinition(token, key, computed, node); + if (maybeMethod) { + return maybeMethod; + } + + if (!key) { + throwUnexpectedToken(lookahead); + } + + // Check for duplicated __proto__ + if (!computed) { + proto = (key.type === Syntax.Identifier && key.name === '__proto__') || + (key.type === Syntax.Literal && key.value === '__proto__'); + if (hasProto.value && proto) { + tolerateError(Messages.DuplicateProtoProperty); + } + hasProto.value |= proto; + } + + if (match(':')) { + lex(); + value = inheritCoverGrammar(parseAssignmentExpression); + return node.finishProperty('init', key, computed, value, false, false); + } + + if (token.type === Token.Identifier) { + if (match('=')) { + firstCoverInitializedNameError = lookahead; + lex(); + value = isolateCoverGrammar(parseAssignmentExpression); + return node.finishProperty('init', key, computed, + new WrappingNode(token).finishAssignmentPattern(key, value), false, true); + } + return node.finishProperty('init', key, computed, key, false, true); + } + + throwUnexpectedToken(lookahead); + } + + function parseObjectInitializer() { + var properties = [], hasProto = {value: false}, node = new Node(); + + expect('{'); + + while (!match('}')) { + properties.push(parseObjectProperty(hasProto)); + + if (!match('}')) { + expectCommaSeparator(); + } + } + + expect('}'); + + return node.finishObjectExpression(properties); + } + + function reinterpretExpressionAsPattern(expr) { + var i; + switch (expr.type) { + case Syntax.Identifier: + case Syntax.MemberExpression: + case Syntax.RestElement: + case Syntax.AssignmentPattern: + break; + case Syntax.SpreadElement: + expr.type = Syntax.RestElement; + reinterpretExpressionAsPattern(expr.argument); + break; + case Syntax.ArrayExpression: + expr.type = Syntax.ArrayPattern; + for (i = 0; i < expr.elements.length; i++) { + if (expr.elements[i] !== null) { + reinterpretExpressionAsPattern(expr.elements[i]); + } + } + break; + case Syntax.ObjectExpression: + expr.type = Syntax.ObjectPattern; + for (i = 0; i < expr.properties.length; i++) { + reinterpretExpressionAsPattern(expr.properties[i].value); + } + break; + case Syntax.AssignmentExpression: + expr.type = Syntax.AssignmentPattern; + reinterpretExpressionAsPattern(expr.left); + break; + default: + // Allow other node type for tolerant parsing. + break; + } + } + + // ECMA-262 12.2.9 Template Literals + + function parseTemplateElement(option) { + var node, token; + + if (lookahead.type !== Token.Template || (option.head && !lookahead.head)) { + throwUnexpectedToken(); + } + + node = new Node(); + token = lex(); + + return node.finishTemplateElement({ raw: token.value.raw, cooked: token.value.cooked }, token.tail); + } + + function parseTemplateLiteral() { + var quasi, quasis, expressions, node = new Node(); + + quasi = parseTemplateElement({ head: true }); + quasis = [quasi]; + expressions = []; + + while (!quasi.tail) { + expressions.push(parseExpression()); + quasi = parseTemplateElement({ head: false }); + quasis.push(quasi); + } + + return node.finishTemplateLiteral(quasis, expressions); + } + + // ECMA-262 12.2.10 The Grouping Operator + + function parseGroupExpression() { + var expr, expressions, startToken, i, params = []; + + expect('('); + + if (match(')')) { + lex(); + if (!match('=>')) { + expect('=>'); + } + return { + type: PlaceHolders.ArrowParameterPlaceHolder, + params: [], + rawParams: [] + }; + } + + startToken = lookahead; + if (match('...')) { + expr = parseRestElement(params); + expect(')'); + if (!match('=>')) { + expect('=>'); + } + return { + type: PlaceHolders.ArrowParameterPlaceHolder, + params: [expr] + }; + } + + isBindingElement = true; + expr = inheritCoverGrammar(parseAssignmentExpression); + + if (match(',')) { + isAssignmentTarget = false; + expressions = [expr]; + + while (startIndex < length) { + if (!match(',')) { + break; + } + lex(); + + if (match('...')) { + if (!isBindingElement) { + throwUnexpectedToken(lookahead); + } + expressions.push(parseRestElement(params)); + expect(')'); + if (!match('=>')) { + expect('=>'); + } + isBindingElement = false; + for (i = 0; i < expressions.length; i++) { + reinterpretExpressionAsPattern(expressions[i]); + } + return { + type: PlaceHolders.ArrowParameterPlaceHolder, + params: expressions + }; + } + + expressions.push(inheritCoverGrammar(parseAssignmentExpression)); + } + + expr = new WrappingNode(startToken).finishSequenceExpression(expressions); + } + + + expect(')'); + + if (match('=>')) { + if (expr.type === Syntax.Identifier && expr.name === 'yield') { + return { + type: PlaceHolders.ArrowParameterPlaceHolder, + params: [expr] + }; + } + + if (!isBindingElement) { + throwUnexpectedToken(lookahead); + } + + if (expr.type === Syntax.SequenceExpression) { + for (i = 0; i < expr.expressions.length; i++) { + reinterpretExpressionAsPattern(expr.expressions[i]); + } + } else { + reinterpretExpressionAsPattern(expr); + } + + expr = { + type: PlaceHolders.ArrowParameterPlaceHolder, + params: expr.type === Syntax.SequenceExpression ? expr.expressions : [expr] + }; + } + isBindingElement = false; + return expr; + } + + + // ECMA-262 12.2 Primary Expressions + + function parsePrimaryExpression() { + var type, token, expr, node; + + if (match('(')) { + isBindingElement = false; + return inheritCoverGrammar(parseGroupExpression); + } + + if (match('[')) { + return inheritCoverGrammar(parseArrayInitializer); + } + + if (match('{')) { + return inheritCoverGrammar(parseObjectInitializer); + } + + type = lookahead.type; + node = new Node(); + + if (type === Token.Identifier) { + if (state.sourceType === 'module' && lookahead.value === 'await') { + tolerateUnexpectedToken(lookahead); + } + expr = node.finishIdentifier(lex().value); + } else if (type === Token.StringLiteral || type === Token.NumericLiteral) { + isAssignmentTarget = isBindingElement = false; + if (strict && lookahead.octal) { + tolerateUnexpectedToken(lookahead, Messages.StrictOctalLiteral); + } + expr = node.finishLiteral(lex()); + } else if (type === Token.Keyword) { + if (!strict && state.allowYield && matchKeyword('yield')) { + return parseNonComputedProperty(); + } + if (!strict && matchKeyword('let')) { + return node.finishIdentifier(lex().value); + } + isAssignmentTarget = isBindingElement = false; + if (matchKeyword('function')) { + return parseFunctionExpression(); + } + if (matchKeyword('this')) { + lex(); + return node.finishThisExpression(); + } + if (matchKeyword('class')) { + return parseClassExpression(); + } + throwUnexpectedToken(lex()); + } else if (type === Token.BooleanLiteral) { + isAssignmentTarget = isBindingElement = false; + token = lex(); + token.value = (token.value === 'true'); + expr = node.finishLiteral(token); + } else if (type === Token.NullLiteral) { + isAssignmentTarget = isBindingElement = false; + token = lex(); + token.value = null; + expr = node.finishLiteral(token); + } else if (match('/') || match('/=')) { + isAssignmentTarget = isBindingElement = false; + index = startIndex; + + if (typeof extra.tokens !== 'undefined') { + token = collectRegex(); + } else { + token = scanRegExp(); + } + lex(); + expr = node.finishLiteral(token); + } else if (type === Token.Template) { + expr = parseTemplateLiteral(); + } else { + throwUnexpectedToken(lex()); + } + + return expr; + } + + // ECMA-262 12.3 Left-Hand-Side Expressions + + function parseArguments() { + var args = [], expr; + + expect('('); + + if (!match(')')) { + while (startIndex < length) { + if (match('...')) { + expr = new Node(); + lex(); + expr.finishSpreadElement(isolateCoverGrammar(parseAssignmentExpression)); + } else { + expr = isolateCoverGrammar(parseAssignmentExpression); + } + args.push(expr); + if (match(')')) { + break; + } + expectCommaSeparator(); + } + } + + expect(')'); + + return args; + } + + function parseNonComputedProperty() { + var token, node = new Node(); + + token = lex(); + + if (!isIdentifierName(token)) { + throwUnexpectedToken(token); + } + + return node.finishIdentifier(token.value); + } + + function parseNonComputedMember() { + expect('.'); + + return parseNonComputedProperty(); + } + + function parseComputedMember() { + var expr; + + expect('['); + + expr = isolateCoverGrammar(parseExpression); + + expect(']'); + + return expr; + } + + // ECMA-262 12.3.3 The new Operator + + function parseNewExpression() { + var callee, args, node = new Node(); + + expectKeyword('new'); + + if (match('.')) { + lex(); + if (lookahead.type === Token.Identifier && lookahead.value === 'target') { + if (state.inFunctionBody) { + lex(); + return node.finishMetaProperty('new', 'target'); + } + } + throwUnexpectedToken(lookahead); + } + + callee = isolateCoverGrammar(parseLeftHandSideExpression); + args = match('(') ? parseArguments() : []; + + isAssignmentTarget = isBindingElement = false; + + return node.finishNewExpression(callee, args); + } + + // ECMA-262 12.3.4 Function Calls + + function parseLeftHandSideExpressionAllowCall() { + var quasi, expr, args, property, startToken, previousAllowIn = state.allowIn; + + startToken = lookahead; + state.allowIn = true; + + if (matchKeyword('super') && state.inFunctionBody) { + expr = new Node(); + lex(); + expr = expr.finishSuper(); + if (!match('(') && !match('.') && !match('[')) { + throwUnexpectedToken(lookahead); + } + } else { + expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression); + } + + for (;;) { + if (match('.')) { + isBindingElement = false; + isAssignmentTarget = true; + property = parseNonComputedMember(); + expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property); + } else if (match('(')) { + isBindingElement = false; + isAssignmentTarget = false; + args = parseArguments(); + expr = new WrappingNode(startToken).finishCallExpression(expr, args); + } else if (match('[')) { + isBindingElement = false; + isAssignmentTarget = true; + property = parseComputedMember(); + expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property); + } else if (lookahead.type === Token.Template && lookahead.head) { + quasi = parseTemplateLiteral(); + expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi); + } else { + break; + } + } + state.allowIn = previousAllowIn; + + return expr; + } + + // ECMA-262 12.3 Left-Hand-Side Expressions + + function parseLeftHandSideExpression() { + var quasi, expr, property, startToken; + assert(state.allowIn, 'callee of new expression always allow in keyword.'); + + startToken = lookahead; + + if (matchKeyword('super') && state.inFunctionBody) { + expr = new Node(); + lex(); + expr = expr.finishSuper(); + if (!match('[') && !match('.')) { + throwUnexpectedToken(lookahead); + } + } else { + expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression); + } + + for (;;) { + if (match('[')) { + isBindingElement = false; + isAssignmentTarget = true; + property = parseComputedMember(); + expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property); + } else if (match('.')) { + isBindingElement = false; + isAssignmentTarget = true; + property = parseNonComputedMember(); + expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property); + } else if (lookahead.type === Token.Template && lookahead.head) { + quasi = parseTemplateLiteral(); + expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi); + } else { + break; + } + } + return expr; + } + + // ECMA-262 12.4 Postfix Expressions + + function parsePostfixExpression() { + var expr, token, startToken = lookahead; + + expr = inheritCoverGrammar(parseLeftHandSideExpressionAllowCall); + + if (!hasLineTerminator && lookahead.type === Token.Punctuator) { + if (match('++') || match('--')) { + // ECMA-262 11.3.1, 11.3.2 + if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) { + tolerateError(Messages.StrictLHSPostfix); + } + + if (!isAssignmentTarget) { + tolerateError(Messages.InvalidLHSInAssignment); + } + + isAssignmentTarget = isBindingElement = false; + + token = lex(); + expr = new WrappingNode(startToken).finishPostfixExpression(token.value, expr); + } + } + + return expr; + } + + // ECMA-262 12.5 Unary Operators + + function parseUnaryExpression() { + var token, expr, startToken; + + if (lookahead.type !== Token.Punctuator && lookahead.type !== Token.Keyword) { + expr = parsePostfixExpression(); + } else if (match('++') || match('--')) { + startToken = lookahead; + token = lex(); + expr = inheritCoverGrammar(parseUnaryExpression); + // ECMA-262 11.4.4, 11.4.5 + if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) { + tolerateError(Messages.StrictLHSPrefix); + } + + if (!isAssignmentTarget) { + tolerateError(Messages.InvalidLHSInAssignment); + } + expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr); + isAssignmentTarget = isBindingElement = false; + } else if (match('+') || match('-') || match('~') || match('!')) { + startToken = lookahead; + token = lex(); + expr = inheritCoverGrammar(parseUnaryExpression); + expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr); + isAssignmentTarget = isBindingElement = false; + } else if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) { + startToken = lookahead; + token = lex(); + expr = inheritCoverGrammar(parseUnaryExpression); + expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr); + if (strict && expr.operator === 'delete' && expr.argument.type === Syntax.Identifier) { + tolerateError(Messages.StrictDelete); + } + isAssignmentTarget = isBindingElement = false; + } else { + expr = parsePostfixExpression(); + } + + return expr; + } + + function binaryPrecedence(token, allowIn) { + var prec = 0; + + if (token.type !== Token.Punctuator && token.type !== Token.Keyword) { + return 0; + } + + switch (token.value) { + case '||': + prec = 1; + break; + + case '&&': + prec = 2; + break; + + case '|': + prec = 3; + break; + + case '^': + prec = 4; + break; + + case '&': + prec = 5; + break; + + case '==': + case '!=': + case '===': + case '!==': + prec = 6; + break; + + case '<': + case '>': + case '<=': + case '>=': + case 'instanceof': + prec = 7; + break; + + case 'in': + prec = allowIn ? 7 : 0; + break; + + case '<<': + case '>>': + case '>>>': + prec = 8; + break; + + case '+': + case '-': + prec = 9; + break; + + case '*': + case '/': + case '%': + prec = 11; + break; + + default: + break; + } + + return prec; + } + + // ECMA-262 12.6 Multiplicative Operators + // ECMA-262 12.7 Additive Operators + // ECMA-262 12.8 Bitwise Shift Operators + // ECMA-262 12.9 Relational Operators + // ECMA-262 12.10 Equality Operators + // ECMA-262 12.11 Binary Bitwise Operators + // ECMA-262 12.12 Binary Logical Operators + + function parseBinaryExpression() { + var marker, markers, expr, token, prec, stack, right, operator, left, i; + + marker = lookahead; + left = inheritCoverGrammar(parseUnaryExpression); + + token = lookahead; + prec = binaryPrecedence(token, state.allowIn); + if (prec === 0) { + return left; + } + isAssignmentTarget = isBindingElement = false; + token.prec = prec; + lex(); + + markers = [marker, lookahead]; + right = isolateCoverGrammar(parseUnaryExpression); + + stack = [left, token, right]; + + while ((prec = binaryPrecedence(lookahead, state.allowIn)) > 0) { + + // Reduce: make a binary expression from the three topmost entries. + while ((stack.length > 2) && (prec <= stack[stack.length - 2].prec)) { + right = stack.pop(); + operator = stack.pop().value; + left = stack.pop(); + markers.pop(); + expr = new WrappingNode(markers[markers.length - 1]).finishBinaryExpression(operator, left, right); + stack.push(expr); + } + + // Shift. + token = lex(); + token.prec = prec; + stack.push(token); + markers.push(lookahead); + expr = isolateCoverGrammar(parseUnaryExpression); + stack.push(expr); + } + + // Final reduce to clean-up the stack. + i = stack.length - 1; + expr = stack[i]; + markers.pop(); + while (i > 1) { + expr = new WrappingNode(markers.pop()).finishBinaryExpression(stack[i - 1].value, stack[i - 2], expr); + i -= 2; + } + + return expr; + } + + + // ECMA-262 12.13 Conditional Operator + + function parseConditionalExpression() { + var expr, previousAllowIn, consequent, alternate, startToken; + + startToken = lookahead; + + expr = inheritCoverGrammar(parseBinaryExpression); + if (match('?')) { + lex(); + previousAllowIn = state.allowIn; + state.allowIn = true; + consequent = isolateCoverGrammar(parseAssignmentExpression); + state.allowIn = previousAllowIn; + expect(':'); + alternate = isolateCoverGrammar(parseAssignmentExpression); + + expr = new WrappingNode(startToken).finishConditionalExpression(expr, consequent, alternate); + isAssignmentTarget = isBindingElement = false; + } + + return expr; + } + + // ECMA-262 14.2 Arrow Function Definitions + + function parseConciseBody() { + if (match('{')) { + return parseFunctionSourceElements(); + } + return isolateCoverGrammar(parseAssignmentExpression); + } + + function checkPatternParam(options, param) { + var i; + switch (param.type) { + case Syntax.Identifier: + validateParam(options, param, param.name); + break; + case Syntax.RestElement: + checkPatternParam(options, param.argument); + break; + case Syntax.AssignmentPattern: + checkPatternParam(options, param.left); + break; + case Syntax.ArrayPattern: + for (i = 0; i < param.elements.length; i++) { + if (param.elements[i] !== null) { + checkPatternParam(options, param.elements[i]); + } + } + break; + case Syntax.YieldExpression: + break; + default: + assert(param.type === Syntax.ObjectPattern, 'Invalid type'); + for (i = 0; i < param.properties.length; i++) { + checkPatternParam(options, param.properties[i].value); + } + break; + } + } + function reinterpretAsCoverFormalsList(expr) { + var i, len, param, params, defaults, defaultCount, options, token; + + defaults = []; + defaultCount = 0; + params = [expr]; + + switch (expr.type) { + case Syntax.Identifier: + break; + case PlaceHolders.ArrowParameterPlaceHolder: + params = expr.params; + break; + default: + return null; + } + + options = { + paramSet: {} + }; + + for (i = 0, len = params.length; i < len; i += 1) { + param = params[i]; + switch (param.type) { + case Syntax.AssignmentPattern: + params[i] = param.left; + if (param.right.type === Syntax.YieldExpression) { + if (param.right.argument) { + throwUnexpectedToken(lookahead); + } + param.right.type = Syntax.Identifier; + param.right.name = 'yield'; + delete param.right.argument; + delete param.right.delegate; + } + defaults.push(param.right); + ++defaultCount; + checkPatternParam(options, param.left); + break; + default: + checkPatternParam(options, param); + params[i] = param; + defaults.push(null); + break; + } + } + + if (strict || !state.allowYield) { + for (i = 0, len = params.length; i < len; i += 1) { + param = params[i]; + if (param.type === Syntax.YieldExpression) { + throwUnexpectedToken(lookahead); + } + } + } + + if (options.message === Messages.StrictParamDupe) { + token = strict ? options.stricted : options.firstRestricted; + throwUnexpectedToken(token, options.message); + } + + if (defaultCount === 0) { + defaults = []; + } + + return { + params: params, + defaults: defaults, + stricted: options.stricted, + firstRestricted: options.firstRestricted, + message: options.message + }; + } + + function parseArrowFunctionExpression(options, node) { + var previousStrict, previousAllowYield, body; + + if (hasLineTerminator) { + tolerateUnexpectedToken(lookahead); + } + expect('=>'); + + previousStrict = strict; + previousAllowYield = state.allowYield; + state.allowYield = true; + + body = parseConciseBody(); + + if (strict && options.firstRestricted) { + throwUnexpectedToken(options.firstRestricted, options.message); + } + if (strict && options.stricted) { + tolerateUnexpectedToken(options.stricted, options.message); + } + + strict = previousStrict; + state.allowYield = previousAllowYield; + + return node.finishArrowFunctionExpression(options.params, options.defaults, body, body.type !== Syntax.BlockStatement); + } + + // ECMA-262 14.4 Yield expression + + function parseYieldExpression() { + var argument, expr, delegate, previousAllowYield; + + argument = null; + expr = new Node(); + delegate = false; + + expectKeyword('yield'); + + if (!hasLineTerminator) { + previousAllowYield = state.allowYield; + state.allowYield = false; + delegate = match('*'); + if (delegate) { + lex(); + argument = parseAssignmentExpression(); + } else { + if (!match(';') && !match('}') && !match(')') && lookahead.type !== Token.EOF) { + argument = parseAssignmentExpression(); + } + } + state.allowYield = previousAllowYield; + } + + return expr.finishYieldExpression(argument, delegate); + } + + // ECMA-262 12.14 Assignment Operators + + function parseAssignmentExpression() { + var token, expr, right, list, startToken; + + startToken = lookahead; + token = lookahead; + + if (!state.allowYield && matchKeyword('yield')) { + return parseYieldExpression(); + } + + expr = parseConditionalExpression(); + + if (expr.type === PlaceHolders.ArrowParameterPlaceHolder || match('=>')) { + isAssignmentTarget = isBindingElement = false; + list = reinterpretAsCoverFormalsList(expr); + + if (list) { + firstCoverInitializedNameError = null; + return parseArrowFunctionExpression(list, new WrappingNode(startToken)); + } + + return expr; + } + + if (matchAssign()) { + if (!isAssignmentTarget) { + tolerateError(Messages.InvalidLHSInAssignment); + } + + // ECMA-262 12.1.1 + if (strict && expr.type === Syntax.Identifier) { + if (isRestrictedWord(expr.name)) { + tolerateUnexpectedToken(token, Messages.StrictLHSAssignment); + } + if (isStrictModeReservedWord(expr.name)) { + tolerateUnexpectedToken(token, Messages.StrictReservedWord); + } + } + + if (!match('=')) { + isAssignmentTarget = isBindingElement = false; + } else { + reinterpretExpressionAsPattern(expr); + } + + token = lex(); + right = isolateCoverGrammar(parseAssignmentExpression); + expr = new WrappingNode(startToken).finishAssignmentExpression(token.value, expr, right); + firstCoverInitializedNameError = null; + } + + return expr; + } + + // ECMA-262 12.15 Comma Operator + + function parseExpression() { + var expr, startToken = lookahead, expressions; + + expr = isolateCoverGrammar(parseAssignmentExpression); + + if (match(',')) { + expressions = [expr]; + + while (startIndex < length) { + if (!match(',')) { + break; + } + lex(); + expressions.push(isolateCoverGrammar(parseAssignmentExpression)); + } + + expr = new WrappingNode(startToken).finishSequenceExpression(expressions); + } + + return expr; + } + + // ECMA-262 13.2 Block + + function parseStatementListItem() { + if (lookahead.type === Token.Keyword) { + switch (lookahead.value) { + case 'export': + if (state.sourceType !== 'module') { + tolerateUnexpectedToken(lookahead, Messages.IllegalExportDeclaration); + } + return parseExportDeclaration(); + case 'import': + if (state.sourceType !== 'module') { + tolerateUnexpectedToken(lookahead, Messages.IllegalImportDeclaration); + } + return parseImportDeclaration(); + case 'const': + return parseLexicalDeclaration({inFor: false}); + case 'function': + return parseFunctionDeclaration(new Node()); + case 'class': + return parseClassDeclaration(); + } + } + + if (matchKeyword('let') && isLexicalDeclaration()) { + return parseLexicalDeclaration({inFor: false}); + } + + return parseStatement(); + } + + function parseStatementList() { + var list = []; + while (startIndex < length) { + if (match('}')) { + break; + } + list.push(parseStatementListItem()); + } + + return list; + } + + function parseBlock() { + var block, node = new Node(); + + expect('{'); + + block = parseStatementList(); + + expect('}'); + + return node.finishBlockStatement(block); + } + + // ECMA-262 13.3.2 Variable Statement + + function parseVariableIdentifier(kind) { + var token, node = new Node(); + + token = lex(); + + if (token.type === Token.Keyword && token.value === 'yield') { + if (strict) { + tolerateUnexpectedToken(token, Messages.StrictReservedWord); + } if (!state.allowYield) { + throwUnexpectedToken(token); + } + } else if (token.type !== Token.Identifier) { + if (strict && token.type === Token.Keyword && isStrictModeReservedWord(token.value)) { + tolerateUnexpectedToken(token, Messages.StrictReservedWord); + } else { + if (strict || token.value !== 'let' || kind !== 'var') { + throwUnexpectedToken(token); + } + } + } else if (state.sourceType === 'module' && token.type === Token.Identifier && token.value === 'await') { + tolerateUnexpectedToken(token); + } + + return node.finishIdentifier(token.value); + } + + function parseVariableDeclaration(options) { + var init = null, id, node = new Node(), params = []; + + id = parsePattern(params, 'var'); + + // ECMA-262 12.2.1 + if (strict && isRestrictedWord(id.name)) { + tolerateError(Messages.StrictVarName); + } + + if (match('=')) { + lex(); + init = isolateCoverGrammar(parseAssignmentExpression); + } else if (id.type !== Syntax.Identifier && !options.inFor) { + expect('='); + } + + return node.finishVariableDeclarator(id, init); + } + + function parseVariableDeclarationList(options) { + var opt, list; + + opt = { inFor: options.inFor }; + list = [parseVariableDeclaration(opt)]; + + while (match(',')) { + lex(); + list.push(parseVariableDeclaration(opt)); + } + + return list; + } + + function parseVariableStatement(node) { + var declarations; + + expectKeyword('var'); + + declarations = parseVariableDeclarationList({ inFor: false }); + + consumeSemicolon(); + + return node.finishVariableDeclaration(declarations); + } + + // ECMA-262 13.3.1 Let and Const Declarations + + function parseLexicalBinding(kind, options) { + var init = null, id, node = new Node(), params = []; + + id = parsePattern(params, kind); + + // ECMA-262 12.2.1 + if (strict && id.type === Syntax.Identifier && isRestrictedWord(id.name)) { + tolerateError(Messages.StrictVarName); + } + + if (kind === 'const') { + if (!matchKeyword('in') && !matchContextualKeyword('of')) { + expect('='); + init = isolateCoverGrammar(parseAssignmentExpression); + } + } else if ((!options.inFor && id.type !== Syntax.Identifier) || match('=')) { + expect('='); + init = isolateCoverGrammar(parseAssignmentExpression); + } + + return node.finishVariableDeclarator(id, init); + } + + function parseBindingList(kind, options) { + var list = [parseLexicalBinding(kind, options)]; + + while (match(',')) { + lex(); + list.push(parseLexicalBinding(kind, options)); + } + + return list; + } + + + function tokenizerState() { + return { + index: index, + lineNumber: lineNumber, + lineStart: lineStart, + hasLineTerminator: hasLineTerminator, + lastIndex: lastIndex, + lastLineNumber: lastLineNumber, + lastLineStart: lastLineStart, + startIndex: startIndex, + startLineNumber: startLineNumber, + startLineStart: startLineStart, + lookahead: lookahead, + tokenCount: extra.tokens ? extra.tokens.length : 0 + }; + } + + function resetTokenizerState(ts) { + index = ts.index; + lineNumber = ts.lineNumber; + lineStart = ts.lineStart; + hasLineTerminator = ts.hasLineTerminator; + lastIndex = ts.lastIndex; + lastLineNumber = ts.lastLineNumber; + lastLineStart = ts.lastLineStart; + startIndex = ts.startIndex; + startLineNumber = ts.startLineNumber; + startLineStart = ts.startLineStart; + lookahead = ts.lookahead; + if (extra.tokens) { + extra.tokens.splice(ts.tokenCount, extra.tokens.length); + } + } + + function isLexicalDeclaration() { + var lexical, ts; + + ts = tokenizerState(); + + lex(); + lexical = (lookahead.type === Token.Identifier) || match('[') || match('{') || + matchKeyword('let') || matchKeyword('yield'); + + resetTokenizerState(ts); + + return lexical; + } + + function parseLexicalDeclaration(options) { + var kind, declarations, node = new Node(); + + kind = lex().value; + assert(kind === 'let' || kind === 'const', 'Lexical declaration must be either let or const'); + + declarations = parseBindingList(kind, options); + + consumeSemicolon(); + + return node.finishLexicalDeclaration(declarations, kind); + } + + function parseRestElement(params) { + var param, node = new Node(); + + lex(); + + if (match('{')) { + throwError(Messages.ObjectPatternAsRestParameter); + } + + params.push(lookahead); + + param = parseVariableIdentifier(); + + if (match('=')) { + throwError(Messages.DefaultRestParameter); + } + + if (!match(')')) { + throwError(Messages.ParameterAfterRestParameter); + } + + return node.finishRestElement(param); + } + + // ECMA-262 13.4 Empty Statement + + function parseEmptyStatement(node) { + expect(';'); + return node.finishEmptyStatement(); + } + + // ECMA-262 12.4 Expression Statement + + function parseExpressionStatement(node) { + var expr = parseExpression(); + consumeSemicolon(); + return node.finishExpressionStatement(expr); + } + + // ECMA-262 13.6 If statement + + function parseIfStatement(node) { + var test, consequent, alternate; + + expectKeyword('if'); + + expect('('); + + test = parseExpression(); + + expect(')'); + + consequent = parseStatement(); + + if (matchKeyword('else')) { + lex(); + alternate = parseStatement(); + } else { + alternate = null; + } + + return node.finishIfStatement(test, consequent, alternate); + } + + // ECMA-262 13.7 Iteration Statements + + function parseDoWhileStatement(node) { + var body, test, oldInIteration; + + expectKeyword('do'); + + oldInIteration = state.inIteration; + state.inIteration = true; + + body = parseStatement(); + + state.inIteration = oldInIteration; + + expectKeyword('while'); + + expect('('); + + test = parseExpression(); + + expect(')'); + + if (match(';')) { + lex(); + } + + return node.finishDoWhileStatement(body, test); + } + + function parseWhileStatement(node) { + var test, body, oldInIteration; + + expectKeyword('while'); + + expect('('); + + test = parseExpression(); + + expect(')'); + + oldInIteration = state.inIteration; + state.inIteration = true; + + body = parseStatement(); + + state.inIteration = oldInIteration; + + return node.finishWhileStatement(test, body); + } + + function parseForStatement(node) { + var init, forIn, initSeq, initStartToken, test, update, left, right, kind, declarations, + body, oldInIteration, previousAllowIn = state.allowIn; + + init = test = update = null; + forIn = true; + + expectKeyword('for'); + + expect('('); + + if (match(';')) { + lex(); + } else { + if (matchKeyword('var')) { + init = new Node(); + lex(); + + state.allowIn = false; + declarations = parseVariableDeclarationList({ inFor: true }); + state.allowIn = previousAllowIn; + + if (declarations.length === 1 && matchKeyword('in')) { + init = init.finishVariableDeclaration(declarations); + lex(); + left = init; + right = parseExpression(); + init = null; + } else if (declarations.length === 1 && declarations[0].init === null && matchContextualKeyword('of')) { + init = init.finishVariableDeclaration(declarations); + lex(); + left = init; + right = parseAssignmentExpression(); + init = null; + forIn = false; + } else { + init = init.finishVariableDeclaration(declarations); + expect(';'); + } + } else if (matchKeyword('const') || matchKeyword('let')) { + init = new Node(); + kind = lex().value; + + if (!strict && lookahead.value === 'in') { + init = init.finishIdentifier(kind); + lex(); + left = init; + right = parseExpression(); + init = null; + } else { + state.allowIn = false; + declarations = parseBindingList(kind, {inFor: true}); + state.allowIn = previousAllowIn; + + if (declarations.length === 1 && declarations[0].init === null && matchKeyword('in')) { + init = init.finishLexicalDeclaration(declarations, kind); + lex(); + left = init; + right = parseExpression(); + init = null; + } else if (declarations.length === 1 && declarations[0].init === null && matchContextualKeyword('of')) { + init = init.finishLexicalDeclaration(declarations, kind); + lex(); + left = init; + right = parseAssignmentExpression(); + init = null; + forIn = false; + } else { + consumeSemicolon(); + init = init.finishLexicalDeclaration(declarations, kind); + } + } + } else { + initStartToken = lookahead; + state.allowIn = false; + init = inheritCoverGrammar(parseAssignmentExpression); + state.allowIn = previousAllowIn; + + if (matchKeyword('in')) { + if (!isAssignmentTarget) { + tolerateError(Messages.InvalidLHSInForIn); + } + + lex(); + reinterpretExpressionAsPattern(init); + left = init; + right = parseExpression(); + init = null; + } else if (matchContextualKeyword('of')) { + if (!isAssignmentTarget) { + tolerateError(Messages.InvalidLHSInForLoop); + } + + lex(); + reinterpretExpressionAsPattern(init); + left = init; + right = parseAssignmentExpression(); + init = null; + forIn = false; + } else { + if (match(',')) { + initSeq = [init]; + while (match(',')) { + lex(); + initSeq.push(isolateCoverGrammar(parseAssignmentExpression)); + } + init = new WrappingNode(initStartToken).finishSequenceExpression(initSeq); + } + expect(';'); + } + } + } + + if (typeof left === 'undefined') { + + if (!match(';')) { + test = parseExpression(); + } + expect(';'); + + if (!match(')')) { + update = parseExpression(); + } + } + + expect(')'); + + oldInIteration = state.inIteration; + state.inIteration = true; + + body = isolateCoverGrammar(parseStatement); + + state.inIteration = oldInIteration; + + return (typeof left === 'undefined') ? + node.finishForStatement(init, test, update, body) : + forIn ? node.finishForInStatement(left, right, body) : + node.finishForOfStatement(left, right, body); + } + + // ECMA-262 13.8 The continue statement + + function parseContinueStatement(node) { + var label = null, key; + + expectKeyword('continue'); + + // Optimize the most common form: 'continue;'. + if (source.charCodeAt(startIndex) === 0x3B) { + lex(); + + if (!state.inIteration) { + throwError(Messages.IllegalContinue); + } + + return node.finishContinueStatement(null); + } + + if (hasLineTerminator) { + if (!state.inIteration) { + throwError(Messages.IllegalContinue); + } + + return node.finishContinueStatement(null); + } + + if (lookahead.type === Token.Identifier) { + label = parseVariableIdentifier(); + + key = '$' + label.name; + if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) { + throwError(Messages.UnknownLabel, label.name); + } + } + + consumeSemicolon(); + + if (label === null && !state.inIteration) { + throwError(Messages.IllegalContinue); + } + + return node.finishContinueStatement(label); + } + + // ECMA-262 13.9 The break statement + + function parseBreakStatement(node) { + var label = null, key; + + expectKeyword('break'); + + // Catch the very common case first: immediately a semicolon (U+003B). + if (source.charCodeAt(lastIndex) === 0x3B) { + lex(); + + if (!(state.inIteration || state.inSwitch)) { + throwError(Messages.IllegalBreak); + } + + return node.finishBreakStatement(null); + } + + if (hasLineTerminator) { + if (!(state.inIteration || state.inSwitch)) { + throwError(Messages.IllegalBreak); + } + } else if (lookahead.type === Token.Identifier) { + label = parseVariableIdentifier(); + + key = '$' + label.name; + if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) { + throwError(Messages.UnknownLabel, label.name); + } + } + + consumeSemicolon(); + + if (label === null && !(state.inIteration || state.inSwitch)) { + throwError(Messages.IllegalBreak); + } + + return node.finishBreakStatement(label); + } + + // ECMA-262 13.10 The return statement + + function parseReturnStatement(node) { + var argument = null; + + expectKeyword('return'); + + if (!state.inFunctionBody) { + tolerateError(Messages.IllegalReturn); + } + + // 'return' followed by a space and an identifier is very common. + if (source.charCodeAt(lastIndex) === 0x20) { + if (isIdentifierStart(source.charCodeAt(lastIndex + 1))) { + argument = parseExpression(); + consumeSemicolon(); + return node.finishReturnStatement(argument); + } + } + + if (hasLineTerminator) { + // HACK + return node.finishReturnStatement(null); + } + + if (!match(';')) { + if (!match('}') && lookahead.type !== Token.EOF) { + argument = parseExpression(); + } + } + + consumeSemicolon(); + + return node.finishReturnStatement(argument); + } + + // ECMA-262 13.11 The with statement + + function parseWithStatement(node) { + var object, body; + + if (strict) { + tolerateError(Messages.StrictModeWith); + } + + expectKeyword('with'); + + expect('('); + + object = parseExpression(); + + expect(')'); + + body = parseStatement(); + + return node.finishWithStatement(object, body); + } + + // ECMA-262 13.12 The switch statement + + function parseSwitchCase() { + var test, consequent = [], statement, node = new Node(); + + if (matchKeyword('default')) { + lex(); + test = null; + } else { + expectKeyword('case'); + test = parseExpression(); + } + expect(':'); + + while (startIndex < length) { + if (match('}') || matchKeyword('default') || matchKeyword('case')) { + break; + } + statement = parseStatementListItem(); + consequent.push(statement); + } + + return node.finishSwitchCase(test, consequent); + } + + function parseSwitchStatement(node) { + var discriminant, cases, clause, oldInSwitch, defaultFound; + + expectKeyword('switch'); + + expect('('); + + discriminant = parseExpression(); + + expect(')'); + + expect('{'); + + cases = []; + + if (match('}')) { + lex(); + return node.finishSwitchStatement(discriminant, cases); + } + + oldInSwitch = state.inSwitch; + state.inSwitch = true; + defaultFound = false; + + while (startIndex < length) { + if (match('}')) { + break; + } + clause = parseSwitchCase(); + if (clause.test === null) { + if (defaultFound) { + throwError(Messages.MultipleDefaultsInSwitch); + } + defaultFound = true; + } + cases.push(clause); + } + + state.inSwitch = oldInSwitch; + + expect('}'); + + return node.finishSwitchStatement(discriminant, cases); + } + + // ECMA-262 13.14 The throw statement + + function parseThrowStatement(node) { + var argument; + + expectKeyword('throw'); + + if (hasLineTerminator) { + throwError(Messages.NewlineAfterThrow); + } + + argument = parseExpression(); + + consumeSemicolon(); + + return node.finishThrowStatement(argument); + } + + // ECMA-262 13.15 The try statement + + function parseCatchClause() { + var param, params = [], paramMap = {}, key, i, body, node = new Node(); + + expectKeyword('catch'); + + expect('('); + if (match(')')) { + throwUnexpectedToken(lookahead); + } + + param = parsePattern(params); + for (i = 0; i < params.length; i++) { + key = '$' + params[i].value; + if (Object.prototype.hasOwnProperty.call(paramMap, key)) { + tolerateError(Messages.DuplicateBinding, params[i].value); + } + paramMap[key] = true; + } + + // ECMA-262 12.14.1 + if (strict && isRestrictedWord(param.name)) { + tolerateError(Messages.StrictCatchVariable); + } + + expect(')'); + body = parseBlock(); + return node.finishCatchClause(param, body); + } + + function parseTryStatement(node) { + var block, handler = null, finalizer = null; + + expectKeyword('try'); + + block = parseBlock(); + + if (matchKeyword('catch')) { + handler = parseCatchClause(); + } + + if (matchKeyword('finally')) { + lex(); + finalizer = parseBlock(); + } + + if (!handler && !finalizer) { + throwError(Messages.NoCatchOrFinally); + } + + return node.finishTryStatement(block, handler, finalizer); + } + + // ECMA-262 13.16 The debugger statement + + function parseDebuggerStatement(node) { + expectKeyword('debugger'); + + consumeSemicolon(); + + return node.finishDebuggerStatement(); + } + + // 13 Statements + + function parseStatement() { + var type = lookahead.type, + expr, + labeledBody, + key, + node; + + if (type === Token.EOF) { + throwUnexpectedToken(lookahead); + } + + if (type === Token.Punctuator && lookahead.value === '{') { + return parseBlock(); + } + isAssignmentTarget = isBindingElement = true; + node = new Node(); + + if (type === Token.Punctuator) { + switch (lookahead.value) { + case ';': + return parseEmptyStatement(node); + case '(': + return parseExpressionStatement(node); + default: + break; + } + } else if (type === Token.Keyword) { + switch (lookahead.value) { + case 'break': + return parseBreakStatement(node); + case 'continue': + return parseContinueStatement(node); + case 'debugger': + return parseDebuggerStatement(node); + case 'do': + return parseDoWhileStatement(node); + case 'for': + return parseForStatement(node); + case 'function': + return parseFunctionDeclaration(node); + case 'if': + return parseIfStatement(node); + case 'return': + return parseReturnStatement(node); + case 'switch': + return parseSwitchStatement(node); + case 'throw': + return parseThrowStatement(node); + case 'try': + return parseTryStatement(node); + case 'var': + return parseVariableStatement(node); + case 'while': + return parseWhileStatement(node); + case 'with': + return parseWithStatement(node); + default: + break; + } + } + + expr = parseExpression(); + + // ECMA-262 12.12 Labelled Statements + if ((expr.type === Syntax.Identifier) && match(':')) { + lex(); + + key = '$' + expr.name; + if (Object.prototype.hasOwnProperty.call(state.labelSet, key)) { + throwError(Messages.Redeclaration, 'Label', expr.name); + } + + state.labelSet[key] = true; + labeledBody = parseStatement(); + delete state.labelSet[key]; + return node.finishLabeledStatement(expr, labeledBody); + } + + consumeSemicolon(); + + return node.finishExpressionStatement(expr); + } + + // ECMA-262 14.1 Function Definition + + function parseFunctionSourceElements() { + var statement, body = [], token, directive, firstRestricted, + oldLabelSet, oldInIteration, oldInSwitch, oldInFunctionBody, oldParenthesisCount, + node = new Node(); + + expect('{'); + + while (startIndex < length) { + if (lookahead.type !== Token.StringLiteral) { + break; + } + token = lookahead; + + statement = parseStatementListItem(); + body.push(statement); + if (statement.expression.type !== Syntax.Literal) { + // this is not directive + break; + } + directive = source.slice(token.start + 1, token.end - 1); + if (directive === 'use strict') { + strict = true; + if (firstRestricted) { + tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral); + } + } else { + if (!firstRestricted && token.octal) { + firstRestricted = token; + } + } + } + + oldLabelSet = state.labelSet; + oldInIteration = state.inIteration; + oldInSwitch = state.inSwitch; + oldInFunctionBody = state.inFunctionBody; + oldParenthesisCount = state.parenthesizedCount; + + state.labelSet = {}; + state.inIteration = false; + state.inSwitch = false; + state.inFunctionBody = true; + state.parenthesizedCount = 0; + + while (startIndex < length) { + if (match('}')) { + break; + } + body.push(parseStatementListItem()); + } + + expect('}'); + + state.labelSet = oldLabelSet; + state.inIteration = oldInIteration; + state.inSwitch = oldInSwitch; + state.inFunctionBody = oldInFunctionBody; + state.parenthesizedCount = oldParenthesisCount; + + return node.finishBlockStatement(body); + } + + function validateParam(options, param, name) { + var key = '$' + name; + if (strict) { + if (isRestrictedWord(name)) { + options.stricted = param; + options.message = Messages.StrictParamName; + } + if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) { + options.stricted = param; + options.message = Messages.StrictParamDupe; + } + } else if (!options.firstRestricted) { + if (isRestrictedWord(name)) { + options.firstRestricted = param; + options.message = Messages.StrictParamName; + } else if (isStrictModeReservedWord(name)) { + options.firstRestricted = param; + options.message = Messages.StrictReservedWord; + } else if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) { + options.stricted = param; + options.message = Messages.StrictParamDupe; + } + } + options.paramSet[key] = true; + } + + function parseParam(options) { + var token, param, params = [], i, def; + + token = lookahead; + if (token.value === '...') { + param = parseRestElement(params); + validateParam(options, param.argument, param.argument.name); + options.params.push(param); + options.defaults.push(null); + return false; + } + + param = parsePatternWithDefault(params); + for (i = 0; i < params.length; i++) { + validateParam(options, params[i], params[i].value); + } + + if (param.type === Syntax.AssignmentPattern) { + def = param.right; + param = param.left; + ++options.defaultCount; + } + + options.params.push(param); + options.defaults.push(def); + + return !match(')'); + } + + function parseParams(firstRestricted) { + var options; + + options = { + params: [], + defaultCount: 0, + defaults: [], + firstRestricted: firstRestricted + }; + + expect('('); + + if (!match(')')) { + options.paramSet = {}; + while (startIndex < length) { + if (!parseParam(options)) { + break; + } + expect(','); + } + } + + expect(')'); + + if (options.defaultCount === 0) { + options.defaults = []; + } + + return { + params: options.params, + defaults: options.defaults, + stricted: options.stricted, + firstRestricted: options.firstRestricted, + message: options.message + }; + } + + function parseFunctionDeclaration(node, identifierIsOptional) { + var id = null, params = [], defaults = [], body, token, stricted, tmp, firstRestricted, message, previousStrict, + isGenerator, previousAllowYield; + + previousAllowYield = state.allowYield; + + expectKeyword('function'); + + isGenerator = match('*'); + if (isGenerator) { + lex(); + } + + if (!identifierIsOptional || !match('(')) { + token = lookahead; + id = parseVariableIdentifier(); + if (strict) { + if (isRestrictedWord(token.value)) { + tolerateUnexpectedToken(token, Messages.StrictFunctionName); + } + } else { + if (isRestrictedWord(token.value)) { + firstRestricted = token; + message = Messages.StrictFunctionName; + } else if (isStrictModeReservedWord(token.value)) { + firstRestricted = token; + message = Messages.StrictReservedWord; + } + } + } + + state.allowYield = !isGenerator; + tmp = parseParams(firstRestricted); + params = tmp.params; + defaults = tmp.defaults; + stricted = tmp.stricted; + firstRestricted = tmp.firstRestricted; + if (tmp.message) { + message = tmp.message; + } + + + previousStrict = strict; + body = parseFunctionSourceElements(); + if (strict && firstRestricted) { + throwUnexpectedToken(firstRestricted, message); + } + if (strict && stricted) { + tolerateUnexpectedToken(stricted, message); + } + + strict = previousStrict; + state.allowYield = previousAllowYield; + + return node.finishFunctionDeclaration(id, params, defaults, body, isGenerator); + } + + function parseFunctionExpression() { + var token, id = null, stricted, firstRestricted, message, tmp, + params = [], defaults = [], body, previousStrict, node = new Node(), + isGenerator, previousAllowYield; + + previousAllowYield = state.allowYield; + + expectKeyword('function'); + + isGenerator = match('*'); + if (isGenerator) { + lex(); + } + + state.allowYield = !isGenerator; + if (!match('(')) { + token = lookahead; + id = (!strict && !isGenerator && matchKeyword('yield')) ? parseNonComputedProperty() : parseVariableIdentifier(); + if (strict) { + if (isRestrictedWord(token.value)) { + tolerateUnexpectedToken(token, Messages.StrictFunctionName); + } + } else { + if (isRestrictedWord(token.value)) { + firstRestricted = token; + message = Messages.StrictFunctionName; + } else if (isStrictModeReservedWord(token.value)) { + firstRestricted = token; + message = Messages.StrictReservedWord; + } + } + } + + tmp = parseParams(firstRestricted); + params = tmp.params; + defaults = tmp.defaults; + stricted = tmp.stricted; + firstRestricted = tmp.firstRestricted; + if (tmp.message) { + message = tmp.message; + } + + previousStrict = strict; + body = parseFunctionSourceElements(); + if (strict && firstRestricted) { + throwUnexpectedToken(firstRestricted, message); + } + if (strict && stricted) { + tolerateUnexpectedToken(stricted, message); + } + strict = previousStrict; + state.allowYield = previousAllowYield; + + return node.finishFunctionExpression(id, params, defaults, body, isGenerator); + } + + // ECMA-262 14.5 Class Definitions + + function parseClassBody() { + var classBody, token, isStatic, hasConstructor = false, body, method, computed, key; + + classBody = new Node(); + + expect('{'); + body = []; + while (!match('}')) { + if (match(';')) { + lex(); + } else { + method = new Node(); + token = lookahead; + isStatic = false; + computed = match('['); + if (match('*')) { + lex(); + } else { + key = parseObjectPropertyKey(); + if (key.name === 'static' && (lookaheadPropertyName() || match('*'))) { + token = lookahead; + isStatic = true; + computed = match('['); + if (match('*')) { + lex(); + } else { + key = parseObjectPropertyKey(); + } + } + } + method = tryParseMethodDefinition(token, key, computed, method); + if (method) { + method['static'] = isStatic; // jscs:ignore requireDotNotation + if (method.kind === 'init') { + method.kind = 'method'; + } + if (!isStatic) { + if (!method.computed && (method.key.name || method.key.value.toString()) === 'constructor') { + if (method.kind !== 'method' || !method.method || method.value.generator) { + throwUnexpectedToken(token, Messages.ConstructorSpecialMethod); + } + if (hasConstructor) { + throwUnexpectedToken(token, Messages.DuplicateConstructor); + } else { + hasConstructor = true; + } + method.kind = 'constructor'; + } + } else { + if (!method.computed && (method.key.name || method.key.value.toString()) === 'prototype') { + throwUnexpectedToken(token, Messages.StaticPrototype); + } + } + method.type = Syntax.MethodDefinition; + delete method.method; + delete method.shorthand; + body.push(method); + } else { + throwUnexpectedToken(lookahead); + } + } + } + lex(); + return classBody.finishClassBody(body); + } + + function parseClassDeclaration(identifierIsOptional) { + var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict; + strict = true; + + expectKeyword('class'); + + if (!identifierIsOptional || lookahead.type === Token.Identifier) { + id = parseVariableIdentifier(); + } + + if (matchKeyword('extends')) { + lex(); + superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall); + } + classBody = parseClassBody(); + strict = previousStrict; + + return classNode.finishClassDeclaration(id, superClass, classBody); + } + + function parseClassExpression() { + var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict; + strict = true; + + expectKeyword('class'); + + if (lookahead.type === Token.Identifier) { + id = parseVariableIdentifier(); + } + + if (matchKeyword('extends')) { + lex(); + superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall); + } + classBody = parseClassBody(); + strict = previousStrict; + + return classNode.finishClassExpression(id, superClass, classBody); + } + + // ECMA-262 15.2 Modules + + function parseModuleSpecifier() { + var node = new Node(); + + if (lookahead.type !== Token.StringLiteral) { + throwError(Messages.InvalidModuleSpecifier); + } + return node.finishLiteral(lex()); + } + + // ECMA-262 15.2.3 Exports + + function parseExportSpecifier() { + var exported, local, node = new Node(), def; + if (matchKeyword('default')) { + // export {default} from 'something'; + def = new Node(); + lex(); + local = def.finishIdentifier('default'); + } else { + local = parseVariableIdentifier(); + } + if (matchContextualKeyword('as')) { + lex(); + exported = parseNonComputedProperty(); + } + return node.finishExportSpecifier(local, exported); + } + + function parseExportNamedDeclaration(node) { + var declaration = null, + isExportFromIdentifier, + src = null, specifiers = []; + + // non-default export + if (lookahead.type === Token.Keyword) { + // covers: + // export var f = 1; + switch (lookahead.value) { + case 'let': + case 'const': + declaration = parseLexicalDeclaration({inFor: false}); + return node.finishExportNamedDeclaration(declaration, specifiers, null); + case 'var': + case 'class': + case 'function': + declaration = parseStatementListItem(); + return node.finishExportNamedDeclaration(declaration, specifiers, null); + } + } + + expect('{'); + while (!match('}')) { + isExportFromIdentifier = isExportFromIdentifier || matchKeyword('default'); + specifiers.push(parseExportSpecifier()); + if (!match('}')) { + expect(','); + if (match('}')) { + break; + } + } + } + expect('}'); + + if (matchContextualKeyword('from')) { + // covering: + // export {default} from 'foo'; + // export {foo} from 'foo'; + lex(); + src = parseModuleSpecifier(); + consumeSemicolon(); + } else if (isExportFromIdentifier) { + // covering: + // export {default}; // missing fromClause + throwError(lookahead.value ? + Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value); + } else { + // cover + // export {foo}; + consumeSemicolon(); + } + return node.finishExportNamedDeclaration(declaration, specifiers, src); + } + + function parseExportDefaultDeclaration(node) { + var declaration = null, + expression = null; + + // covers: + // export default ... + expectKeyword('default'); + + if (matchKeyword('function')) { + // covers: + // export default function foo () {} + // export default function () {} + declaration = parseFunctionDeclaration(new Node(), true); + return node.finishExportDefaultDeclaration(declaration); + } + if (matchKeyword('class')) { + declaration = parseClassDeclaration(true); + return node.finishExportDefaultDeclaration(declaration); + } + + if (matchContextualKeyword('from')) { + throwError(Messages.UnexpectedToken, lookahead.value); + } + + // covers: + // export default {}; + // export default []; + // export default (1 + 2); + if (match('{')) { + expression = parseObjectInitializer(); + } else if (match('[')) { + expression = parseArrayInitializer(); + } else { + expression = parseAssignmentExpression(); + } + consumeSemicolon(); + return node.finishExportDefaultDeclaration(expression); + } + + function parseExportAllDeclaration(node) { + var src; + + // covers: + // export * from 'foo'; + expect('*'); + if (!matchContextualKeyword('from')) { + throwError(lookahead.value ? + Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value); + } + lex(); + src = parseModuleSpecifier(); + consumeSemicolon(); + + return node.finishExportAllDeclaration(src); + } + + function parseExportDeclaration() { + var node = new Node(); + if (state.inFunctionBody) { + throwError(Messages.IllegalExportDeclaration); + } + + expectKeyword('export'); + + if (matchKeyword('default')) { + return parseExportDefaultDeclaration(node); + } + if (match('*')) { + return parseExportAllDeclaration(node); + } + return parseExportNamedDeclaration(node); + } + + // ECMA-262 15.2.2 Imports + + function parseImportSpecifier() { + // import {} ...; + var local, imported, node = new Node(); + + imported = parseNonComputedProperty(); + if (matchContextualKeyword('as')) { + lex(); + local = parseVariableIdentifier(); + } + + return node.finishImportSpecifier(local, imported); + } + + function parseNamedImports() { + var specifiers = []; + // {foo, bar as bas} + expect('{'); + while (!match('}')) { + specifiers.push(parseImportSpecifier()); + if (!match('}')) { + expect(','); + if (match('}')) { + break; + } + } + } + expect('}'); + return specifiers; + } + + function parseImportDefaultSpecifier() { + // import ...; + var local, node = new Node(); + + local = parseNonComputedProperty(); + + return node.finishImportDefaultSpecifier(local); + } + + function parseImportNamespaceSpecifier() { + // import <* as foo> ...; + var local, node = new Node(); + + expect('*'); + if (!matchContextualKeyword('as')) { + throwError(Messages.NoAsAfterImportNamespace); + } + lex(); + local = parseNonComputedProperty(); + + return node.finishImportNamespaceSpecifier(local); + } + + function parseImportDeclaration() { + var specifiers = [], src, node = new Node(); + + if (state.inFunctionBody) { + throwError(Messages.IllegalImportDeclaration); + } + + expectKeyword('import'); + + if (lookahead.type === Token.StringLiteral) { + // import 'foo'; + src = parseModuleSpecifier(); + } else { + + if (match('{')) { + // import {bar} + specifiers = specifiers.concat(parseNamedImports()); + } else if (match('*')) { + // import * as foo + specifiers.push(parseImportNamespaceSpecifier()); + } else if (isIdentifierName(lookahead) && !matchKeyword('default')) { + // import foo + specifiers.push(parseImportDefaultSpecifier()); + if (match(',')) { + lex(); + if (match('*')) { + // import foo, * as foo + specifiers.push(parseImportNamespaceSpecifier()); + } else if (match('{')) { + // import foo, {bar} + specifiers = specifiers.concat(parseNamedImports()); + } else { + throwUnexpectedToken(lookahead); + } + } + } else { + throwUnexpectedToken(lex()); + } + + if (!matchContextualKeyword('from')) { + throwError(lookahead.value ? + Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value); + } + lex(); + src = parseModuleSpecifier(); + } + + consumeSemicolon(); + return node.finishImportDeclaration(specifiers, src); + } + + // ECMA-262 15.1 Scripts + + function parseScriptBody() { + var statement, body = [], token, directive, firstRestricted; + + while (startIndex < length) { + token = lookahead; + if (token.type !== Token.StringLiteral) { + break; + } + + statement = parseStatementListItem(); + body.push(statement); + if (statement.expression.type !== Syntax.Literal) { + // this is not directive + break; + } + directive = source.slice(token.start + 1, token.end - 1); + if (directive === 'use strict') { + strict = true; + if (firstRestricted) { + tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral); + } + } else { + if (!firstRestricted && token.octal) { + firstRestricted = token; + } + } + } + + while (startIndex < length) { + statement = parseStatementListItem(); + /* istanbul ignore if */ + if (typeof statement === 'undefined') { + break; + } + body.push(statement); + } + return body; + } + + function parseProgram() { + var body, node; + + peek(); + node = new Node(); + + body = parseScriptBody(); + return node.finishProgram(body, state.sourceType); + } + + function filterTokenLocation() { + var i, entry, token, tokens = []; + + for (i = 0; i < extra.tokens.length; ++i) { + entry = extra.tokens[i]; + token = { + type: entry.type, + value: entry.value + }; + if (entry.regex) { + token.regex = { + pattern: entry.regex.pattern, + flags: entry.regex.flags + }; + } + if (extra.range) { + token.range = entry.range; + } + if (extra.loc) { + token.loc = entry.loc; + } + tokens.push(token); + } + + extra.tokens = tokens; + } + + function tokenize(code, options, delegate) { + var toString, + tokens; + + toString = String; + if (typeof code !== 'string' && !(code instanceof String)) { + code = toString(code); + } + + source = code; + index = 0; + lineNumber = (source.length > 0) ? 1 : 0; + lineStart = 0; + startIndex = index; + startLineNumber = lineNumber; + startLineStart = lineStart; + length = source.length; + lookahead = null; + state = { + allowIn: true, + allowYield: true, + labelSet: {}, + inFunctionBody: false, + inIteration: false, + inSwitch: false, + lastCommentStart: -1, + curlyStack: [] + }; + + extra = {}; + + // Options matching. + options = options || {}; + + // Of course we collect tokens here. + options.tokens = true; + extra.tokens = []; + extra.tokenValues = []; + extra.tokenize = true; + extra.delegate = delegate; + + // The following two fields are necessary to compute the Regex tokens. + extra.openParenToken = -1; + extra.openCurlyToken = -1; + + extra.range = (typeof options.range === 'boolean') && options.range; + extra.loc = (typeof options.loc === 'boolean') && options.loc; + + if (typeof options.comment === 'boolean' && options.comment) { + extra.comments = []; + } + if (typeof options.tolerant === 'boolean' && options.tolerant) { + extra.errors = []; + } + + try { + peek(); + if (lookahead.type === Token.EOF) { + return extra.tokens; + } + + lex(); + while (lookahead.type !== Token.EOF) { + try { + lex(); + } catch (lexError) { + if (extra.errors) { + recordError(lexError); + // We have to break on the first error + // to avoid infinite loops. + break; + } else { + throw lexError; + } + } + } + + tokens = extra.tokens; + if (typeof extra.errors !== 'undefined') { + tokens.errors = extra.errors; + } + } catch (e) { + throw e; + } finally { + extra = {}; + } + return tokens; + } + + function parse(code, options) { + var program, toString; + + toString = String; + if (typeof code !== 'string' && !(code instanceof String)) { + code = toString(code); + } + + source = code; + index = 0; + lineNumber = (source.length > 0) ? 1 : 0; + lineStart = 0; + startIndex = index; + startLineNumber = lineNumber; + startLineStart = lineStart; + length = source.length; + lookahead = null; + state = { + allowIn: true, + allowYield: true, + labelSet: {}, + inFunctionBody: false, + inIteration: false, + inSwitch: false, + lastCommentStart: -1, + curlyStack: [], + sourceType: 'script' + }; + strict = false; + + extra = {}; + if (typeof options !== 'undefined') { + extra.range = (typeof options.range === 'boolean') && options.range; + extra.loc = (typeof options.loc === 'boolean') && options.loc; + extra.attachComment = (typeof options.attachComment === 'boolean') && options.attachComment; + + if (extra.loc && options.source !== null && options.source !== undefined) { + extra.source = toString(options.source); + } + + if (typeof options.tokens === 'boolean' && options.tokens) { + extra.tokens = []; + } + if (typeof options.comment === 'boolean' && options.comment) { + extra.comments = []; + } + if (typeof options.tolerant === 'boolean' && options.tolerant) { + extra.errors = []; + } + if (extra.attachComment) { + extra.range = true; + extra.comments = []; + extra.bottomRightStack = []; + extra.trailingComments = []; + extra.leadingComments = []; + } + if (options.sourceType === 'module') { + // very restrictive condition for now + state.sourceType = options.sourceType; + strict = true; + } + } + + try { + program = parseProgram(); + if (typeof extra.comments !== 'undefined') { + program.comments = extra.comments; + } + if (typeof extra.tokens !== 'undefined') { + filterTokenLocation(); + program.tokens = extra.tokens; + } + if (typeof extra.errors !== 'undefined') { + program.errors = extra.errors; + } + } catch (e) { + throw e; + } finally { + extra = {}; + } + + return program; + } + + // Sync with *.json manifests. + exports.version = '2.7.1'; + + exports.tokenize = tokenize; + + exports.parse = parse; + + // Deep copy. + /* istanbul ignore next */ + exports.Syntax = (function () { + var name, types = {}; + + if (typeof Object.create === 'function') { + types = Object.create(null); + } + + for (name in Syntax) { + if (Syntax.hasOwnProperty(name)) { + types[name] = Syntax[name]; + } + } + + if (typeof Object.freeze === 'function') { + Object.freeze(types); + } + + return types; + }()); + +})); +/* vim: set sw=4 ts=4 et tw=80 : */ diff --git a/test/compare-acorn-es6/exports.expected.min.js b/test/compare-acorn-es6/exports.expected.min.js deleted file mode 100644 index 43ff5b06..00000000 --- a/test/compare-acorn-es6/exports.expected.min.js +++ /dev/null @@ -1 +0,0 @@ -export*from'OK';export{name}from'OK';export{a as b,c as d}from'hello';export{a as b,c as d};export{};export default i=20;export function test(){}export var i=20;export let i=42 diff --git a/test/compare-esprima2.js b/test/compare-esprima2.js index 4a965580..2dad7076 100644 --- a/test/compare-esprima2.js +++ b/test/compare-esprima2.js @@ -25,7 +25,7 @@ 'use strict'; var fs = require('fs'), - esprima = require('./3rdparty/esprima-2.5.0'), + esprima = require('./3rdparty/esprima-2.7.1'), escodegen = require('./loader'), chai = require('chai'), expect = chai.expect, diff --git a/test/compare-acorn-es6/exports.expected.js b/test/compare-esprima2/exports.expected.js similarity index 90% rename from test/compare-acorn-es6/exports.expected.js rename to test/compare-esprima2/exports.expected.js index e85a78ed..e804009f 100644 --- a/test/compare-acorn-es6/exports.expected.js +++ b/test/compare-esprima2/exports.expected.js @@ -11,7 +11,6 @@ export { c as d }; export { }; -export default i = 20; export function test() { } export var i = 20; diff --git a/test/compare-esprima2/exports.expected.min.js b/test/compare-esprima2/exports.expected.min.js new file mode 100644 index 00000000..18e3a726 --- /dev/null +++ b/test/compare-esprima2/exports.expected.min.js @@ -0,0 +1 @@ +export*from'OK';export{name}from'OK';export{a as b,c as d}from'hello';export{a as b,c as d};export{};export function test(){}export var i=20;export let i=42 diff --git a/test/compare-acorn-es6/exports.js b/test/compare-esprima2/exports.js similarity index 89% rename from test/compare-acorn-es6/exports.js rename to test/compare-esprima2/exports.js index d76fe5a8..28091f9a 100644 --- a/test/compare-acorn-es6/exports.js +++ b/test/compare-esprima2/exports.js @@ -3,7 +3,6 @@ export { name } from "OK" export { a as b, c as d } from "hello" export { a as b, c as d } export { } -export default i = 20 export function test() { } export var i = 20 export let i = 42 diff --git a/test/compare-harmony/imports.expected.js b/test/compare-esprima2/imports.expected.js similarity index 100% rename from test/compare-harmony/imports.expected.js rename to test/compare-esprima2/imports.expected.js diff --git a/test/compare-harmony/imports.expected.min.js b/test/compare-esprima2/imports.expected.min.js similarity index 100% rename from test/compare-harmony/imports.expected.min.js rename to test/compare-esprima2/imports.expected.min.js diff --git a/test/compare-harmony/imports.js b/test/compare-esprima2/imports.js similarity index 100% rename from test/compare-harmony/imports.js rename to test/compare-esprima2/imports.js diff --git a/test/compare-harmony/export-default-declaration.expected.js b/test/compare-harmony/export-default-declaration.expected.js deleted file mode 100644 index 20102028..00000000 --- a/test/compare-harmony/export-default-declaration.expected.js +++ /dev/null @@ -1,2 +0,0 @@ -export default function a() { -} diff --git a/test/compare-harmony/export-default-declaration.expected.min.js b/test/compare-harmony/export-default-declaration.expected.min.js deleted file mode 100644 index 4c00c1fc..00000000 --- a/test/compare-harmony/export-default-declaration.expected.min.js +++ /dev/null @@ -1 +0,0 @@ -export default function a(){} diff --git a/test/compare-harmony/export-default-declaration.js b/test/compare-harmony/export-default-declaration.js deleted file mode 100644 index 5ef9d4be..00000000 --- a/test/compare-harmony/export-default-declaration.js +++ /dev/null @@ -1,3 +0,0 @@ -export default function a () { } -// export default var i = 20; -// export default const K = 20; diff --git a/test/compare-harmony/import-with-default.expected.js b/test/compare-harmony/import-with-default.expected.js deleted file mode 100644 index 5e55c4ff..00000000 --- a/test/compare-harmony/import-with-default.expected.js +++ /dev/null @@ -1,8 +0,0 @@ -import foo from 'foo'; -import foo, * as foo from 'foo'; -import * as foo from 'foo'; -import ok, { - foo as bar, - test as testing, - logging -} from 'foo'; diff --git a/test/compare-harmony/import-with-default.expected.min.js b/test/compare-harmony/import-with-default.expected.min.js deleted file mode 100644 index 6b6105f4..00000000 --- a/test/compare-harmony/import-with-default.expected.min.js +++ /dev/null @@ -1 +0,0 @@ -import foo from'foo';import foo,*as foo from'foo';import*as foo from'foo';import ok,{foo as bar,test as testing,logging}from'foo' diff --git a/test/compare-harmony/import-with-default.js b/test/compare-harmony/import-with-default.js deleted file mode 100644 index 5e55c4ff..00000000 --- a/test/compare-harmony/import-with-default.js +++ /dev/null @@ -1,8 +0,0 @@ -import foo from 'foo'; -import foo, * as foo from 'foo'; -import * as foo from 'foo'; -import ok, { - foo as bar, - test as testing, - logging -} from 'foo'; diff --git a/test/harmony-esprima-2.5.js b/test/harmony-esprima2.js similarity index 99% rename from test/harmony-esprima-2.5.js rename to test/harmony-esprima2.js index 8f8959d2..c6189d6d 100644 --- a/test/harmony-esprima-2.5.js +++ b/test/harmony-esprima2.js @@ -31,7 +31,7 @@ 'use strict'; -var esprima = require('./3rdparty/esprima-2.5.0'), +var esprima = require('./3rdparty/esprima-2.7.1'), escodegen = require('./loader'), chai = require('chai'), expect = chai.expect, diff --git a/test/harmony.js b/test/harmony.js index 98cc746c..2087e4f3 100644 --- a/test/harmony.js +++ b/test/harmony.js @@ -2625,223 +2625,6 @@ data = { } }, - 'Harmony export declaration': { - 'export function a() { }': { - type: 'Program', - body: [{ - type: 'ExportDeclaration', - declaration: { - type: 'FunctionDeclaration', - id: { - type: 'Identifier', - name: 'a', - range: [16, 17], - loc: { - start: { line: 1, column: 16 }, - end: { line: 1, column: 17 } - } - }, - params: [], - defaults: [], - body: { - type: 'BlockStatement', - body: [], - range: [20, 23], - loc: { - start: { line: 1, column: 20 }, - end: { line: 1, column: 23 } - } - }, - rest: null, - generator: false, - expression: false, - range: [7, 23], - loc: { - start: { line: 1, column: 7 }, - end: { line: 1, column: 23 } - } - }, - specifiers: null, - source: null, - range: [0, 23], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 23 } - } - }], - range: [0, 23], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 23 } - } - }, - - 'export var i = 20': { - type: 'Program', - body: [{ - type: 'ExportDeclaration', - declaration: { - type: 'VariableDeclaration', - declarations: [{ - type: 'VariableDeclarator', - id: { - type: 'Identifier', - name: 'i', - range: [11, 12], - loc: { - start: { line: 1, column: 11 }, - end: { line: 1, column: 12 } - } - }, - init: { - type: 'Literal', - value: 20, - raw: '20', - range: [15, 17], - loc: { - start: { line: 1, column: 15 }, - end: { line: 1, column: 17 } - } - }, - range: [11, 17], - loc: { - start: { line: 1, column: 11 }, - end: { line: 1, column: 17 } - } - }], - kind: 'var', - range: [7, 17], - loc: { - start: { line: 1, column: 7 }, - end: { line: 1, column: 17 } - } - }, - specifiers: null, - source: null, - range: [0, 17], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 17 } - } - }], - range: [0, 17], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 17 } - } - }, - - 'export let i = 20': { - type: 'Program', - body: [{ - type: 'ExportDeclaration', - declaration: { - type: 'VariableDeclaration', - declarations: [{ - type: 'VariableDeclarator', - id: { - type: 'Identifier', - name: 'i', - range: [11, 12], - loc: { - start: { line: 1, column: 11 }, - end: { line: 1, column: 12 } - } - }, - init: { - type: 'Literal', - value: 20, - raw: '20', - range: [15, 17], - loc: { - start: { line: 1, column: 15 }, - end: { line: 1, column: 17 } - } - }, - range: [11, 17], - loc: { - start: { line: 1, column: 11 }, - end: { line: 1, column: 17 } - } - }], - kind: 'let', - range: [7, 17], - loc: { - start: { line: 1, column: 7 }, - end: { line: 1, column: 17 } - } - }, - specifiers: null, - source: null, - range: [0, 17], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 17 } - } - }], - range: [0, 17], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 17 } - } - }, - - 'export const i = 20': { - type: 'Program', - body: [{ - type: 'ExportDeclaration', - declaration: { - type: 'VariableDeclaration', - declarations: [{ - type: 'VariableDeclarator', - id: { - type: 'Identifier', - name: 'i', - range: [13, 14], - loc: { - start: { line: 1, column: 13 }, - end: { line: 1, column: 14 } - } - }, - init: { - type: 'Literal', - value: 20, - raw: '20', - range: [17, 19], - loc: { - start: { line: 1, column: 17 }, - end: { line: 1, column: 19 } - } - }, - range: [13, 19], - loc: { - start: { line: 1, column: 13 }, - end: { line: 1, column: 19 } - } - }], - kind: 'const', - range: [7, 19], - loc: { - start: { line: 1, column: 7 }, - end: { line: 1, column: 19 } - } - }, - specifiers: null, - source: null, - range: [0, 19], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 19 } - } - }], - range: [0, 19], - loc: { - start: { line: 1, column: 0 }, - end: { line: 1, column: 19 } - } - } - }, - 'Harmony classes': { 'class hello{}': { options: { From b77a9ef7890d5fe9184719c8f08575a8cfca4994 Mon Sep 17 00:00:00 2001 From: Yusuke Suzuki Date: Sun, 3 Jan 2016 09:52:23 +0900 Subject: [PATCH 26/78] Update esprima version to 2.7.1 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 26c603e3..ea67d68d 100644 --- a/package.json +++ b/package.json @@ -33,7 +33,7 @@ "dependencies": { "estraverse": "^1.9.1", "esutils": "^2.0.2", - "esprima": "^1.2.2", + "esprima": "^2.7.1", "optionator": "^0.5.0" }, "optionalDependencies": { From 9e0b891050a493166472f9b1a5ddd43cff630901 Mon Sep 17 00:00:00 2001 From: Yusuke Suzuki Date: Sun, 3 Jan 2016 10:00:02 +0900 Subject: [PATCH 27/78] Update optionator to 0.8.1 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index ea67d68d..2d73dbdf 100644 --- a/package.json +++ b/package.json @@ -34,7 +34,7 @@ "estraverse": "^1.9.1", "esutils": "^2.0.2", "esprima": "^2.7.1", - "optionator": "^0.5.0" + "optionator": "^0.8.1" }, "optionalDependencies": { "source-map": "~0.2.0" From 334bd71ef8326f7ad981f1da92c4ae0637416aa3 Mon Sep 17 00:00:00 2001 From: Yusuke Suzuki Date: Sun, 3 Jan 2016 10:01:32 +0900 Subject: [PATCH 28/78] version 1.8.0 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 2d73dbdf..d96ec002 100644 --- a/package.json +++ b/package.json @@ -15,7 +15,7 @@ "escodegen.js", "package.json" ], - "version": "1.7.1", + "version": "1.8.0", "engines": { "node": ">=0.12.0" }, From 7aa3b049f46348c9c4bb1267605b918ba08e078f Mon Sep 17 00:00:00 2001 From: Yusuke Suzuki Date: Sun, 3 Jan 2016 10:08:09 +0900 Subject: [PATCH 29/78] Add the test with default and anonymous function --- test/compare-esprima2/export-default-declaration.expected.js | 2 ++ .../compare-esprima2/export-default-declaration.expected.min.js | 2 +- test/compare-esprima2/export-default-declaration.js | 1 + 3 files changed, 4 insertions(+), 1 deletion(-) diff --git a/test/compare-esprima2/export-default-declaration.expected.js b/test/compare-esprima2/export-default-declaration.expected.js index 20102028..a9f92d19 100644 --- a/test/compare-esprima2/export-default-declaration.expected.js +++ b/test/compare-esprima2/export-default-declaration.expected.js @@ -1,2 +1,4 @@ export default function a() { } +export default function () { +} diff --git a/test/compare-esprima2/export-default-declaration.expected.min.js b/test/compare-esprima2/export-default-declaration.expected.min.js index 4c00c1fc..ecaae3ed 100644 --- a/test/compare-esprima2/export-default-declaration.expected.min.js +++ b/test/compare-esprima2/export-default-declaration.expected.min.js @@ -1 +1 @@ -export default function a(){} +export default function a(){}export default function (){} diff --git a/test/compare-esprima2/export-default-declaration.js b/test/compare-esprima2/export-default-declaration.js index 5ef9d4be..d99cb8b0 100644 --- a/test/compare-esprima2/export-default-declaration.js +++ b/test/compare-esprima2/export-default-declaration.js @@ -1,3 +1,4 @@ export default function a () { } // export default var i = 20; // export default const K = 20; +export default function () { } From fde0f5357aed9cdd2ab70dba85c37ccb887e9665 Mon Sep 17 00:00:00 2001 From: Zachary Miller Date: Sun, 24 Jan 2016 22:45:25 -0600 Subject: [PATCH 30/78] Add support for anonymous class declarations in default exports This is required because Esprima uses a ClassDeclaration with a null id property when parsing a default export involving an anonymous class. --- escodegen.js | 5 ++++- test/compare-esprima2/export-default-declaration.expected.js | 4 ++++ .../export-default-declaration.expected.min.js | 2 +- test/compare-esprima2/export-default-declaration.js | 2 ++ 4 files changed, 11 insertions(+), 2 deletions(-) diff --git a/escodegen.js b/escodegen.js index 40ea53c0..0c1b1ae4 100644 --- a/escodegen.js +++ b/escodegen.js @@ -1145,7 +1145,10 @@ ClassDeclaration: function (stmt, flags) { var result, fragment; - result = ['class ' + stmt.id.name]; + result = ['class']; + if (stmt.id) { + result = join(result, this.generateExpression(stmt.id, Precedence.Sequence, E_TTT)); + } if (stmt.superClass) { fragment = join('extends', this.generateExpression(stmt.superClass, Precedence.Assignment, E_TTT)); result = join(result, fragment); diff --git a/test/compare-esprima2/export-default-declaration.expected.js b/test/compare-esprima2/export-default-declaration.expected.js index a9f92d19..20a9dba5 100644 --- a/test/compare-esprima2/export-default-declaration.expected.js +++ b/test/compare-esprima2/export-default-declaration.expected.js @@ -2,3 +2,7 @@ export default function a() { } export default function () { } +export default class A { +} +export default class { +} diff --git a/test/compare-esprima2/export-default-declaration.expected.min.js b/test/compare-esprima2/export-default-declaration.expected.min.js index ecaae3ed..6adcd025 100644 --- a/test/compare-esprima2/export-default-declaration.expected.min.js +++ b/test/compare-esprima2/export-default-declaration.expected.min.js @@ -1 +1 @@ -export default function a(){}export default function (){} +export default function a(){}export default function (){}export default class A{}export default class{} diff --git a/test/compare-esprima2/export-default-declaration.js b/test/compare-esprima2/export-default-declaration.js index d99cb8b0..e5de54e8 100644 --- a/test/compare-esprima2/export-default-declaration.js +++ b/test/compare-esprima2/export-default-declaration.js @@ -2,3 +2,5 @@ export default function a () { } // export default var i = 20; // export default const K = 20; export default function () { } +export default class A { } +export default class { } From 4130f99793dcd192a2f92c8e495e9e73435d0e59 Mon Sep 17 00:00:00 2001 From: Zachary Miller Date: Wed, 27 Jan 2016 10:11:20 -0600 Subject: [PATCH 31/78] Test with Acorn (not Acorn-6to5) and fix issue with AssignmentPattern Acorn-6to5 is not up-to-date. After switching to Acorn, a test failed, showing that escodegen had been improperly handling AssignmentPattern. --- escodegen.js | 2 +- package.json | 2 +- test/compare-acorn-es6.js | 18 +++++++----------- 3 files changed, 9 insertions(+), 13 deletions(-) diff --git a/escodegen.js b/escodegen.js index 0c1b1ae4..03605218 100644 --- a/escodegen.js +++ b/escodegen.js @@ -2205,7 +2205,7 @@ }, AssignmentPattern: function(expr, precedence, flags) { - return this.generateAssignment(expr.left, expr.right, expr.operator, precedence, flags); + return this.generateAssignment(expr.left, expr.right, '=', precedence, flags); }, ObjectPattern: function (expr, precedence, flags) { diff --git a/package.json b/package.json index d96ec002..d4595535 100644 --- a/package.json +++ b/package.json @@ -40,7 +40,7 @@ "source-map": "~0.2.0" }, "devDependencies": { - "acorn-6to5": "^0.11.1-25", + "acorn": "^2.7.0", "bluebird": "^2.3.11", "bower-registry-client": "^0.2.1", "chai": "^1.10.0", diff --git a/test/compare-acorn-es6.js b/test/compare-acorn-es6.js index 4ecbbc7d..6384675c 100644 --- a/test/compare-acorn-es6.js +++ b/test/compare-acorn-es6.js @@ -25,7 +25,7 @@ 'use strict'; var fs = require('fs'), - acorn = require('acorn-6to5'), + acorn = require('acorn'), escodegen = require('./loader'), chai = require('chai'), expect = chai.expect; @@ -37,11 +37,9 @@ function test(code, expected) { StringObject = String; options = { - range: true, - loc: false, - tokens: true, - raw: false, - ecmaVersion: 7 + ranges: true, + locations: false, + ecmaVersion: 6 }; tree = acorn.parse(code, options); @@ -58,11 +56,9 @@ function testMin(code, expected) { StringObject = String; options = { - range: true, - loc: false, - tokens: true, - raw: false, - ecmaVersion: 7 + ranges: true, + locations: false, + ecmaVersion: 6 }; tree = acorn.parse(code, options); From 9844f649e45f03a4f8f2f6058adef327c8ff02f8 Mon Sep 17 00:00:00 2001 From: Tyler Waters Date: Fri, 5 Aug 2016 09:01:25 -0700 Subject: [PATCH 32/78] Support for defaults when destructuring parameters (#297) Fixes #296 --- escodegen.js | 22 +++++++---- test/harmony.js | 97 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 111 insertions(+), 8 deletions(-) diff --git a/escodegen.js b/escodegen.js index 03605218..e92b283f 100644 --- a/escodegen.js +++ b/escodegen.js @@ -980,14 +980,20 @@ return result; }; - CodeGenerator.prototype.generatePropertyKey = function (expr, computed) { + CodeGenerator.prototype.generatePropertyKey = function (expr, computed, value) { var result = []; if (computed) { result.push('['); } - result.push(this.generateExpression(expr, Precedence.Sequence, E_TTT)); + if (value.type === 'AssignmentPattern') { + result.push(this.AssignmentPattern(value, Precedence.Sequence, E_TTT)); + } + else { + result.push(this.generateExpression(expr, Precedence.Sequence, E_TTT)); + } + if (computed) { result.push(']'); } @@ -2113,13 +2119,13 @@ } if (expr.kind === 'get' || expr.kind === 'set') { fragment = [ - join(expr.kind, this.generatePropertyKey(expr.key, expr.computed)), + join(expr.kind, this.generatePropertyKey(expr.key, expr.computed, expr.value)), this.generateFunctionBody(expr.value) ]; } else { fragment = [ generateMethodPrefix(expr), - this.generatePropertyKey(expr.key, expr.computed), + this.generatePropertyKey(expr.key, expr.computed, expr.value), this.generateFunctionBody(expr.value) ]; } @@ -2130,25 +2136,25 @@ if (expr.kind === 'get' || expr.kind === 'set') { return [ expr.kind, noEmptySpace(), - this.generatePropertyKey(expr.key, expr.computed), + this.generatePropertyKey(expr.key, expr.computed, expr.value), this.generateFunctionBody(expr.value) ]; } if (expr.shorthand) { - return this.generatePropertyKey(expr.key, expr.computed); + return this.generatePropertyKey(expr.key, expr.computed, expr.value); } if (expr.method) { return [ generateMethodPrefix(expr), - this.generatePropertyKey(expr.key, expr.computed), + this.generatePropertyKey(expr.key, expr.computed, expr.value), this.generateFunctionBody(expr.value) ]; } return [ - this.generatePropertyKey(expr.key, expr.computed), + this.generatePropertyKey(expr.key, expr.computed, expr.value), ':' + space, this.generateExpression(expr.value, Precedence.Assignment, E_TTT) ]; diff --git a/test/harmony.js b/test/harmony.js index 2087e4f3..9941f18d 100644 --- a/test/harmony.js +++ b/test/harmony.js @@ -510,6 +510,103 @@ data = { }, 'Object destructuring (and aliasing)': { + '({a = "b", b = {\n c: "d",\n e: "f"\n }} = {}) => {\n};': { + generateFrom: { + type: "ExpressionStatement", + expression: { + type: "ArrowFunctionExpression", + id: null, + params: [{ + type: "ObjectPattern", + properties: [{ + type: "Property", + key: { + type: "Identifier", + name: "a" + }, + computed: false, + value: { + type: "AssignmentPattern", + left: { + type: "Identifier", + name: "a" + }, + right: { + type: "Literal", + value: "b", + raw: "\"b\"" + } + }, + kind: "init", + method: false, + shorthand: true + }, { + type: "Property", + key: { + type: "Identifier", + name: "b" + }, + computed: false, + value: { + type: "AssignmentPattern", + left: { + type: "Identifier", + name: "b" + }, + right: { + type: "ObjectExpression", + properties: [{ + type: "Property", + key: { + type: "Identifier", + name: "c" + }, + computed: false, + value: { + type: "Literal", + value: "d", + raw: "\"d\"" + }, + kind: "init", + method: false, + shorthand: false + }, { + type: "Property", + key: { + type: "Identifier", + name: "e" + }, + computed: false, + value: { + type: "Literal", + value: "f", + raw: "\"f\"" + }, + kind: "init", + method: false, + shorthand: false + }] + } + }, + kind: "init", + method: false, + shorthand: true + }] + }], + defaults: [{ + type: "ObjectExpression", + properties: [] + }], + body: { + type: "BlockStatement", + body: [] + }, + generator: false, + expression: false + } + } + }, + 'var {\n a,\n b: C\n} = {};' : { generateFrom: { type: 'Program', From 932847d5e077125e6dcc746f8c5642cc33642d31 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Fri, 5 Aug 2016 09:02:12 -0700 Subject: [PATCH 33/78] fix inconsistent brace style from recently merged PR --- escodegen.js | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/escodegen.js b/escodegen.js index e92b283f..6202819e 100644 --- a/escodegen.js +++ b/escodegen.js @@ -989,8 +989,7 @@ if (value.type === 'AssignmentPattern') { result.push(this.AssignmentPattern(value, Precedence.Sequence, E_TTT)); - } - else { + } else { result.push(this.generateExpression(expr, Precedence.Sequence, E_TTT)); } From ba4faabb224b2d5e0080c8e4f964702b699c7d1f Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Sat, 6 Aug 2016 11:04:07 -0700 Subject: [PATCH 34/78] Version 1.8.1 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index d4595535..029d6049 100644 --- a/package.json +++ b/package.json @@ -15,7 +15,7 @@ "escodegen.js", "package.json" ], - "version": "1.8.0", + "version": "1.8.1", "engines": { "node": ">=0.12.0" }, From 719de3033c4a9a0df27f698c47b48d2af7241835 Mon Sep 17 00:00:00 2001 From: Markus Wolf Date: Thu, 1 Sep 2016 08:52:29 +0200 Subject: [PATCH 35/78] fix: create regexp literal if possible (#308) to get around not serializable regexp the raw literal value should be used instead of the value FIX ISSUE #294 --- escodegen.js | 3 +++ 1 file changed, 3 insertions(+) diff --git a/escodegen.js b/escodegen.js index 6202819e..42c05aed 100644 --- a/escodegen.js +++ b/escodegen.js @@ -2331,6 +2331,9 @@ return expr.value ? 'true' : 'false'; } + if (expr.regex) { + return '/' + expr.regex.pattern + '/' + expr.regex.flags; + } return generateRegExp(expr.value); }, From 7bd0e2ed1a7c0c404b29bf5576551dc1bf7a86bb Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Wed, 19 Jul 2017 22:50:56 -0700 Subject: [PATCH 36/78] fixes #104: member expression on number may alter its raw value --- escodegen.js | 2 +- test/ast.js | 22 +++++++++++++++++++++- test/compare/floating-point.expected.js | 1 + test/compare/floating-point.js | 1 + 4 files changed, 24 insertions(+), 2 deletions(-) diff --git a/escodegen.js b/escodegen.js index 42c05aed..e2bad862 100644 --- a/escodegen.js +++ b/escodegen.js @@ -1942,7 +1942,7 @@ esutils.code.isDecimalDigit(fragment.charCodeAt(fragment.length - 1)) && !(fragment.length >= 2 && fragment.charCodeAt(0) === 48) // '0' ) { - result.push('.'); + result.push(' '); } } result.push('.'); diff --git a/test/ast.js b/test/ast.js index a0f2fc7b..7d889884 100644 --- a/test/ast.js +++ b/test/ast.js @@ -144,7 +144,27 @@ data = { }, }], expected: '/(?:)/i;' - } + }, + { + type: 'Program', + body: [{ + type: 'ExpressionStatement', + expression: { + type: 'MemberExpression', + computed: false, + object: { + type: 'Literal', + value: 1, + raw: '1' + }, + property: { + type: 'Identifier', + name: 'a' + } + } + }], + expected: '1 .a;' + }, ] }; diff --git a/test/compare/floating-point.expected.js b/test/compare/floating-point.expected.js index f0c3126d..6c6378e0 100644 --- a/test/compare/floating-point.expected.js +++ b/test/compare/floating-point.expected.js @@ -1,2 +1,3 @@ +1 .valueOf(); 1.1.valueOf(); 1e+300.valueOf(); diff --git a/test/compare/floating-point.js b/test/compare/floating-point.js index b38eebf5..19dd165e 100644 --- a/test/compare/floating-point.js +++ b/test/compare/floating-point.js @@ -1,2 +1,3 @@ +(1).valueOf(); 1.1.valueOf(); (1e+300).valueOf(); From 4640adf59b352e7cbe6986107190d83dfd2b21e3 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Thu, 7 Sep 2017 10:00:06 -0700 Subject: [PATCH 37/78] drop unsupported node versions from Travis config --- .travis.yml | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/.travis.yml b/.travis.yml index 9c8593d2..921e6c86 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,7 +1,6 @@ sudo: false language: node_js node_js: - - "0.10" - - "0.12" - - iojs - "4" + - "6" + - "8" From f82a68534632f2da813bbdfa84be6bf7e7cae2ba Mon Sep 17 00:00:00 2001 From: Yves Le Maout Date: Fri, 27 Jan 2017 15:06:41 -0500 Subject: [PATCH 38/78] Update dependencies --- gulpfile.js | 2 +- package.json | 18 +++++++++--------- .../comment/try-block-line-comment.expected.js | 6 ++---- 3 files changed, 12 insertions(+), 14 deletions(-) diff --git a/gulpfile.js b/gulpfile.js index 3e980244..590e1274 100644 --- a/gulpfile.js +++ b/gulpfile.js @@ -51,7 +51,7 @@ var ESLINT_OPTION = { 'args': 'none' } ], - 'no-multi-spaces': false, + 'no-multi-spaces': 0, 'new-cap': [ 2, { diff --git a/package.json b/package.json index 029d6049..0f7dc51f 100644 --- a/package.json +++ b/package.json @@ -31,23 +31,23 @@ "url": "http://github.com/estools/escodegen.git" }, "dependencies": { - "estraverse": "^1.9.1", + "estraverse": "^4.2.0", "esutils": "^2.0.2", - "esprima": "^2.7.1", + "esprima": "^3.1.3", "optionator": "^0.8.1" }, "optionalDependencies": { - "source-map": "~0.2.0" + "source-map": "~0.5.6" }, "devDependencies": { - "acorn": "^2.7.0", - "bluebird": "^2.3.11", - "bower-registry-client": "^0.2.1", - "chai": "^1.10.0", + "acorn": "^4.0.4", + "bluebird": "^3.4.7", + "bower-registry-client": "^1.0.0", + "chai": "^3.5.0", "commonjs-everywhere": "^0.9.7", "gulp": "^3.8.10", - "gulp-eslint": "^0.2.0", - "gulp-mocha": "^2.0.0", + "gulp-eslint": "^3.0.1", + "gulp-mocha": "^3.0.1", "semver": "^5.1.0" }, "license": "BSD-2-Clause", diff --git a/test/comment/try-block-line-comment.expected.js b/test/comment/try-block-line-comment.expected.js index 726ada5b..d46d7867 100644 --- a/test/comment/try-block-line-comment.expected.js +++ b/test/comment/try-block-line-comment.expected.js @@ -4,13 +4,11 @@ finally { } try { } catch (e) { -} // -finally { +} finally { } { try { } catch (e) { - } // - finally { + } finally { } } From ce726e9092acc6bf93693f1d03ca1eb4f119a0c2 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Fri, 8 Sep 2017 09:33:22 -0700 Subject: [PATCH 39/78] Version 1.9.0 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 0f7dc51f..b3aa435d 100644 --- a/package.json +++ b/package.json @@ -15,7 +15,7 @@ "escodegen.js", "package.json" ], - "version": "1.8.1", + "version": "1.9.0", "engines": { "node": ">=0.12.0" }, From bcd240e341ab777c51f771776aa8a95290f0c421 Mon Sep 17 00:00:00 2001 From: johnjbarton Date: Tue, 24 Oct 2017 10:28:17 -0700 Subject: [PATCH 40/78] Remove license for SourceNodeMocks (#356) * Remove license info for SourceNodeMocks. The code is no long in the repo, so the license is not needed. * Delete LICENSE.source-map The SourceNodeMocks are no longer in the repo. * Remove unused file from files list. --- LICENSE.source-map | 27 --------------------------- README.md | 32 -------------------------------- package.json | 1 - 3 files changed, 60 deletions(-) delete mode 100644 LICENSE.source-map diff --git a/LICENSE.source-map b/LICENSE.source-map deleted file mode 100644 index 259c59ff..00000000 --- a/LICENSE.source-map +++ /dev/null @@ -1,27 +0,0 @@ -Copyright (c) 2009-2011, Mozilla Foundation and contributors -All rights reserved. - -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions are met: - -* Redistributions of source code must retain the above copyright notice, this - list of conditions and the following disclaimer. - -* Redistributions in binary form must reproduce the above copyright notice, - this list of conditions and the following disclaimer in the documentation - and/or other materials provided with the distribution. - -* Neither the names of the Mozilla Foundation nor the names of project - contributors may be used to endorse or promote products derived from this - software without specific prior written permission. - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND -ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED -WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE -DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE -FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR -SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, -OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/README.md b/README.md index e867e4b6..c4917b82 100644 --- a/README.md +++ b/README.md @@ -82,35 +82,3 @@ LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -#### source-map - -SourceNodeMocks has a limited interface of mozilla/source-map SourceNode implementations. - -Copyright (c) 2009-2011, Mozilla Foundation and contributors -All rights reserved. - -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions are met: - -* Redistributions of source code must retain the above copyright notice, this - list of conditions and the following disclaimer. - -* Redistributions in binary form must reproduce the above copyright notice, - this list of conditions and the following disclaimer in the documentation - and/or other materials provided with the distribution. - -* Neither the names of the Mozilla Foundation nor the names of project - contributors may be used to endorse or promote products derived from this - software without specific prior written permission. - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND -ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED -WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE -DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE -FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR -SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, -OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/package.json b/package.json index b3aa435d..4a4df030 100644 --- a/package.json +++ b/package.json @@ -9,7 +9,6 @@ }, "files": [ "LICENSE.BSD", - "LICENSE.source-map", "README.md", "bin", "escodegen.js", From 2056c8b53b8d9a2327d7de7972ee335620ade270 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rouven=20We=C3=9Fling?= Date: Wed, 31 Jan 2018 08:50:50 +0100 Subject: [PATCH 41/78] Drop support for node < 4 (#355) --- escodegen.js | 14 +++----------- package.json | 2 +- 2 files changed, 4 insertions(+), 12 deletions(-) diff --git a/escodegen.js b/escodegen.js index e2bad862..00e5cc8c 100644 --- a/escodegen.js +++ b/escodegen.js @@ -43,7 +43,6 @@ SourceNode, estraverse, esutils, - isArray, base, indent, json, @@ -218,13 +217,6 @@ return result; } - isArray = Array.isArray; - if (!isArray) { - isArray = function isArray(array) { - return Object.prototype.toString.call(array) === '[object Array]'; - }; - } - function hasLineTerminator(str) { return (/[\r\n]/g).test(str); } @@ -505,7 +497,7 @@ var i, iz, elem, result = ''; for (i = 0, iz = arr.length; i < iz; ++i) { elem = arr[i]; - result += isArray(elem) ? flattenToString(elem) : elem; + result += Array.isArray(elem) ? flattenToString(elem) : elem; } return result; } @@ -518,7 +510,7 @@ // with no source maps, generated is either an // array or a string. if an array, flatten it. // if a string, just return it - if (isArray(generated)) { + if (Array.isArray(generated)) { return flattenToString(generated); } else { return generated; @@ -1525,7 +1517,7 @@ // new interface if (stmt.handler) { - if (isArray(stmt.handler)) { + if (Array.isArray(stmt.handler)) { for (i = 0, iz = stmt.handler.length; i < iz; ++i) { result = join(result, this.generateStatement(stmt.handler[i], S_TFFF)); if (stmt.finalizer || i + 1 !== iz) { diff --git a/package.json b/package.json index 4a4df030..4edf0b8a 100644 --- a/package.json +++ b/package.json @@ -16,7 +16,7 @@ ], "version": "1.9.0", "engines": { - "node": ">=0.12.0" + "node": ">=4.0" }, "maintainers": [ { From 612e75a6537fb2066460e87298b65a914054264c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rouven=20We=C3=9Fling?= Date: Wed, 31 Jan 2018 08:51:16 +0100 Subject: [PATCH 42/78] Update source-map to version 0.6.1 (#357) --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 4edf0b8a..dc955e5c 100644 --- a/package.json +++ b/package.json @@ -36,7 +36,7 @@ "optionator": "^0.8.1" }, "optionalDependencies": { - "source-map": "~0.5.6" + "source-map": "~0.6.1" }, "devDependencies": { "acorn": "^4.0.4", From d75935964106db1589103f27b710c32594391d26 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Thu, 1 Feb 2018 13:07:52 -0800 Subject: [PATCH 43/78] fixes #358: correctly codegen AssignmentPattern in ObjectPattern (#361) --- escodegen.js | 23 +++--- test/harmony.js | 197 ++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 208 insertions(+), 12 deletions(-) diff --git a/escodegen.js b/escodegen.js index 00e5cc8c..efcca692 100644 --- a/escodegen.js +++ b/escodegen.js @@ -972,18 +972,14 @@ return result; }; - CodeGenerator.prototype.generatePropertyKey = function (expr, computed, value) { + CodeGenerator.prototype.generatePropertyKey = function (expr, computed) { var result = []; if (computed) { result.push('['); } - if (value.type === 'AssignmentPattern') { - result.push(this.AssignmentPattern(value, Precedence.Sequence, E_TTT)); - } else { - result.push(this.generateExpression(expr, Precedence.Sequence, E_TTT)); - } + result.push(this.generateExpression(expr, Precedence.Sequence, E_TTT)); if (computed) { result.push(']'); @@ -2110,13 +2106,13 @@ } if (expr.kind === 'get' || expr.kind === 'set') { fragment = [ - join(expr.kind, this.generatePropertyKey(expr.key, expr.computed, expr.value)), + join(expr.kind, this.generatePropertyKey(expr.key, expr.computed)), this.generateFunctionBody(expr.value) ]; } else { fragment = [ generateMethodPrefix(expr), - this.generatePropertyKey(expr.key, expr.computed, expr.value), + this.generatePropertyKey(expr.key, expr.computed), this.generateFunctionBody(expr.value) ]; } @@ -2127,25 +2123,28 @@ if (expr.kind === 'get' || expr.kind === 'set') { return [ expr.kind, noEmptySpace(), - this.generatePropertyKey(expr.key, expr.computed, expr.value), + this.generatePropertyKey(expr.key, expr.computed), this.generateFunctionBody(expr.value) ]; } if (expr.shorthand) { - return this.generatePropertyKey(expr.key, expr.computed, expr.value); + if (expr.value.type === "AssignmentPattern") { + return this.AssignmentPattern(expr.value, Precedence.Sequence, E_TTT); + } + return this.generatePropertyKey(expr.key, expr.computed); } if (expr.method) { return [ generateMethodPrefix(expr), - this.generatePropertyKey(expr.key, expr.computed, expr.value), + this.generatePropertyKey(expr.key, expr.computed), this.generateFunctionBody(expr.value) ]; } return [ - this.generatePropertyKey(expr.key, expr.computed, expr.value), + this.generatePropertyKey(expr.key, expr.computed), ':' + space, this.generateExpression(expr.value, Precedence.Assignment, E_TTT) ]; diff --git a/test/harmony.js b/test/harmony.js index 9941f18d..fe836b8f 100644 --- a/test/harmony.js +++ b/test/harmony.js @@ -510,6 +510,203 @@ data = { }, 'Object destructuring (and aliasing)': { + "let {\n test: myvar = 'a'\n} = { test: 'b' };": { + generateFrom: { + loc: { + start: { + line: 1, + column: 0 + }, + end: { + line: 3, + column: 23 + } + }, + type: "Program", + body: [ + { + loc: { + start: { + line: 1, + column: 0 + }, + end: { + line: 3, + column: 23 + } + }, + type: "VariableDeclaration", + declarations: [ + { + loc: { + start: { + line: 1, + column: 4 + }, + end: { + line: 3, + column: 22 + } + }, + type: "VariableDeclarator", + id: { + loc: { + start: { + line: 1, + column: 4 + }, + end: { + line: 3, + column: 1 + } + }, + type: "ObjectPattern", + properties: [ + { + loc: { + start: { + line: 2, + column: 4 + }, + end: { + line: 2, + column: 27 + } + }, + type: "Property", + key: { + loc: { + start: { + line: 2, + column: 4 + }, + end: { + line: 2, + column: 8 + } + }, + type: "Identifier", + name: "test" + }, + computed: false, + value: { + loc: { + start: { + line: 2, + column: 10 + }, + end: { + line: 2, + column: 27 + } + }, + type: "AssignmentPattern", + left: { + loc: { + start: { + line: 2, + column: 10 + }, + end: { + line: 2, + column: 15 + } + }, + type: "Identifier", + name: "myvar" + }, + right: { + loc: { + start: { + line: 2, + column: 18 + }, + end: { + line: 2, + column: 27 + } + }, + type: "Literal", + value: "a", + raw: "'a'" + } + }, + kind: "init", + method: false, + shorthand: false + } + ] + }, + init: { + loc: { + start: { + line: 3, + column: 4 + }, + end: { + line: 3, + column: 22 + } + }, + type: "ObjectExpression", + properties: [ + { + loc: { + start: { + line: 3, + column: 6 + }, + end: { + line: 3, + column: 20 + } + }, + type: "Property", + key: { + loc: { + start: { + line: 3, + column: 6 + }, + end: { + line: 3, + column: 10 + } + }, + type: "Identifier", + name: "test" + }, + computed: false, + value: { + loc: { + start: { + line: 3, + column: 12 + }, + end: { + line: 3, + column: 20 + } + }, + type: "Literal", + value: "b", + raw: "'b'" + }, + kind: "init", + method: false, + shorthand: false + } + ] + } + } + ], + kind: "let" + } + ], + sourceType: "script" + } + }, + '({a = "b", b = {\n c: "d",\n e: "f"\n }} = {}) => {\n};': { generateFrom: { type: "ExpressionStatement", From f0488e1d18bd87e58063f9bc73578c0c8a8ad253 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Mon, 26 Feb 2018 09:48:44 -0800 Subject: [PATCH 44/78] Version 1.9.1 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index dc955e5c..26560bc4 100644 --- a/package.json +++ b/package.json @@ -14,7 +14,7 @@ "escodegen.js", "package.json" ], - "version": "1.9.0", + "version": "1.9.1", "engines": { "node": ">=4.0" }, From 582a4136094b0378480a58c887af48864c985feb Mon Sep 17 00:00:00 2001 From: Michael Ferris Date: Thu, 19 Apr 2018 20:06:55 -0700 Subject: [PATCH 45/78] MetaProperty fields as Identifier (#369) Keep support for plain strings for backward compatibility --- escodegen.js | 4 ++-- test/harmony-esprima2.js | 12 +++++++++--- 2 files changed, 11 insertions(+), 5 deletions(-) diff --git a/escodegen.js b/escodegen.js index efcca692..f4de6921 100644 --- a/escodegen.js +++ b/escodegen.js @@ -1943,9 +1943,9 @@ MetaProperty: function (expr, precedence, flags) { var result; result = []; - result.push(expr.meta); + result.push(typeof expr.meta === "string" ? expr.meta : generateIdentifier(expr.meta)); result.push('.'); - result.push(expr.property); + result.push(typeof expr.property === "string" ? expr.property : generateIdentifier(expr.property)); return parenthesize(result, Precedence.Member, precedence); }, diff --git a/test/harmony-esprima2.js b/test/harmony-esprima2.js index c6189d6d..d19d67dd 100644 --- a/test/harmony-esprima2.js +++ b/test/harmony-esprima2.js @@ -39,7 +39,7 @@ var esprima = require('./3rdparty/esprima-2.7.1'), data = { 'Harmony MetaProperty': { - 'class SomeClass { constructor() { if (new.target === SomeClass) { throw new Error(\'Boom\'); }}}': { + 'class SomeClass { constructor() { if (new.target === SomeClass) { throw new Error(\'Boom\'); }}}': { type: 'Program', body: [ { type: "ClassDeclaration", @@ -73,8 +73,14 @@ data = { operator: "===", left: { type: "MetaProperty", - meta: "new", - property: "target" + meta: { + type: "Identifier", + name: "new" + }, + property: { + type: "Identifier", + name: "target" + }, }, right: { type: "Identifier", From d3b88db1acbb36219bd50a6dee7ea73014012d66 Mon Sep 17 00:00:00 2001 From: Takuto Wada Date: Thu, 10 May 2018 16:20:54 +0900 Subject: [PATCH 46/78] Support async iteration statement `for-await-of` introduced in ES2018 refs: https://tc39.github.io/proposal-async-iteration/ refs: https://github.com/tc39/proposal-async-iteration#the-async-iteration-statement-for-await-of refs: https://github.com/estree/estree/pull/185 --- escodegen.js | 2 +- test/harmony.js | 72 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 73 insertions(+), 1 deletion(-) diff --git a/escodegen.js b/escodegen.js index f4de6921..3d864bbe 100644 --- a/escodegen.js +++ b/escodegen.js @@ -951,7 +951,7 @@ }; CodeGenerator.prototype.generateIterationForStatement = function (operator, stmt, flags) { - var result = ['for' + space + '('], that = this; + var result = ['for' + space + (stmt.await ? 'await' + space : '') + '('], that = this; withIndent(function () { if (stmt.left.type === Syntax.VariableDeclaration) { withIndent(function () { diff --git a/test/harmony.js b/test/harmony.js index fe836b8f..0237b823 100644 --- a/test/harmony.js +++ b/test/harmony.js @@ -6208,6 +6208,78 @@ data = { "async": true } }, + }, + + 'ES2018 for-await-of': { + 'async function f() {\n for await (const x of ait) {\n console.log(x);\n }\n}': { + generateFrom: { + "type": "FunctionDeclaration", + "id": { + "type": "Identifier", + "name": "f" + }, + "params": [], + "body": { + "type": "BlockStatement", + "body": [ + { + "type": "ForOfStatement", + "left": { + "type": "VariableDeclaration", + "declarations": [ + { + "type": "VariableDeclarator", + "id": { + "type": "Identifier", + "name": "x" + }, + "init": null + } + ], + "kind": "const" + }, + "right": { + "type": "Identifier", + "name": "ait" + }, + "body": { + "type": "BlockStatement", + "body": [ + { + "type": "ExpressionStatement", + "expression": { + "type": "CallExpression", + "callee": { + "type": "MemberExpression", + "object": { + "type": "Identifier", + "name": "console" + }, + "property": { + "type": "Identifier", + "name": "log" + }, + "computed": false + }, + "arguments": [ + { + "type": "Identifier", + "name": "x" + } + ] + } + } + ] + }, + "await": true + } + ] + }, + "generator": false, + "async": true + } + } + } }; From df614634b41565888d520222cdc4335079b5a0c2 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Sun, 10 Jun 2018 22:17:48 -0700 Subject: [PATCH 47/78] Version 1.10.0 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 26560bc4..e93870f2 100644 --- a/package.json +++ b/package.json @@ -14,7 +14,7 @@ "escodegen.js", "package.json" ], - "version": "1.9.1", + "version": "1.10.0", "engines": { "node": ">=4.0" }, From 833974b56ccb3714a370f844faad1d8e75a1a2e1 Mon Sep 17 00:00:00 2001 From: Takuto Wada Date: Wed, 11 Jul 2018 18:05:04 +0900 Subject: [PATCH 48/78] Support async generator method introduced in ES2018 refs: https://tc39.github.io/proposal-async-iteration/ refs: https://tc39.github.io/proposal-async-iteration/#prod-AsyncGeneratorMethod --- escodegen.js | 10 +++-- test/harmony.js | 97 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 103 insertions(+), 4 deletions(-) diff --git a/escodegen.js b/escodegen.js index 3d864bbe..9208803c 100644 --- a/escodegen.js +++ b/escodegen.js @@ -868,13 +868,15 @@ } function generateMethodPrefix(prop) { - var func = prop.value; + var func = prop.value, prefix = ''; if (func.async) { - return generateAsyncPrefix(func, !prop.computed); - } else { + prefix += generateAsyncPrefix(func, !prop.computed); + } + if (func.generator) { // avoid space before method name - return generateStarSuffix(func) ? '*' : ''; + prefix += generateStarSuffix(func) ? '*' : ''; } + return prefix; } CodeGenerator.prototype.generatePattern = function (node, precedence, flags) { diff --git a/test/harmony.js b/test/harmony.js index 0237b823..a57e4848 100644 --- a/test/harmony.js +++ b/test/harmony.js @@ -6280,7 +6280,104 @@ data = { } } + }, + + 'ES2018 async generator method': { + 'class C {\n async *readLines(file) {\n while (!file.EOF) {\n yield await file.readLine();\n }\n }\n}': { + generateFrom: { + "type": "ClassDeclaration", + "id": { + "type": "Identifier", + "name": "C" + }, + "superClass": null, + "body": { + "type": "ClassBody", + "body": [ + { + "type": "MethodDefinition", + "key": { + "type": "Identifier", + "name": "readLines" + }, + "value": { + "type": "FunctionExpression", + "id": null, + "params": [ + { + "type": "Identifier", + "name": "file" + } + ], + "body": { + "type": "BlockStatement", + "body": [ + { + "type": "WhileStatement", + "test": { + "type": "UnaryExpression", + "operator": "!", + "prefix": true, + "argument": { + "type": "MemberExpression", + "object": { + "type": "Identifier", + "name": "file" + }, + "property": { + "type": "Identifier", + "name": "EOF" + }, + "computed": false + } + }, + "body": { + "type": "BlockStatement", + "body": [ + { + "type": "ExpressionStatement", + "expression": { + "type": "YieldExpression", + "argument": { + "type": "AwaitExpression", + "argument": { + "type": "CallExpression", + "callee": { + "type": "MemberExpression", + "object": { + "type": "Identifier", + "name": "file" + }, + "property": { + "type": "Identifier", + "name": "readLine" + }, + "computed": false + }, + "arguments": [] + } + }, + "delegate": false + } + } + ] + } + } + ] + }, + "generator": true, + "async": true + }, + "kind": "method", + "computed": false, + "static": false + } + ] + } + } + } } + }; function updateDeeply(target, override) { From 20a0d3748a25653eb463d9155bbaa3239883717a Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Sat, 14 Jul 2018 09:49:11 -0700 Subject: [PATCH 49/78] Version 1.11.0 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index e93870f2..74ef8939 100644 --- a/package.json +++ b/package.json @@ -14,7 +14,7 @@ "escodegen.js", "package.json" ], - "version": "1.10.0", + "version": "1.11.0", "engines": { "node": ">=4.0" }, From 52df4daeae04f3f4dec2627c18d0ada687a016a6 Mon Sep 17 00:00:00 2001 From: Fumiaki Okushi Date: Mon, 27 Aug 2018 15:31:53 -0700 Subject: [PATCH 50/78] fix issue #371 simply adopted solution described by johnjbarton in issue #371 --- escodegen.js | 2 +- test/compare-harmony/for-of-statement.expected.js | 2 ++ test/compare-harmony/for-of-statement.expected.min.js | 2 +- test/compare-harmony/for-of-statement.js | 3 +++ 4 files changed, 7 insertions(+), 2 deletions(-) diff --git a/escodegen.js b/escodegen.js index 9208803c..54e7cfab 100644 --- a/escodegen.js +++ b/escodegen.js @@ -967,7 +967,7 @@ result = join(result, operator); result = [join( result, - that.generateExpression(stmt.right, Precedence.Sequence, E_TTT) + that.generateExpression(stmt.right, Precedence.Assignment, E_TTT) ), ')']; }); result.push(this.maybeBlock(stmt.body, flags)); diff --git a/test/compare-harmony/for-of-statement.expected.js b/test/compare-harmony/for-of-statement.expected.js index 5101c944..b3bda092 100644 --- a/test/compare-harmony/for-of-statement.expected.js +++ b/test/compare-harmony/for-of-statement.expected.js @@ -3,4 +3,6 @@ function test() { } for (let i of array) { } + for (let c of ('x', String('cat'))) { + } } diff --git a/test/compare-harmony/for-of-statement.expected.min.js b/test/compare-harmony/for-of-statement.expected.min.js index d831c22a..bf91f9cb 100644 --- a/test/compare-harmony/for-of-statement.expected.min.js +++ b/test/compare-harmony/for-of-statement.expected.min.js @@ -1 +1 @@ -function test(){for(var i of array){}for(let i of array){}} +function test(){for(var i of array){}for(let i of array){}for(let c of('x',String('cat'))){}} diff --git a/test/compare-harmony/for-of-statement.js b/test/compare-harmony/for-of-statement.js index 10a0e580..0a13ec2b 100644 --- a/test/compare-harmony/for-of-statement.js +++ b/test/compare-harmony/for-of-statement.js @@ -4,4 +4,7 @@ function test() { for (let i of array) { } + + for (let c of ('x', String('cat'))) { + } } From f6df59fc068600803d3a945406de4620b044883a Mon Sep 17 00:00:00 2001 From: Andreas Lind Date: Wed, 9 Jan 2019 00:03:28 +0100 Subject: [PATCH 51/78] Change the precedence of await so it's the same as other unary expressions Fixes #384 https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence --- escodegen.js | 2 +- test/harmony.js | 40 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 41 insertions(+), 1 deletion(-) diff --git a/escodegen.js b/escodegen.js index 54e7cfab..a8d0170c 100644 --- a/escodegen.js +++ b/escodegen.js @@ -82,7 +82,6 @@ Precedence = { Sequence: 0, Yield: 1, - Await: 1, Assignment: 1, Conditional: 2, ArrowFunction: 2, @@ -96,6 +95,7 @@ BitwiseSHIFT: 10, Additive: 11, Multiplicative: 12, + Await: 13, Unary: 13, Postfix: 14, Call: 15, diff --git a/test/harmony.js b/test/harmony.js index a57e4848..2dfeaf9e 100644 --- a/test/harmony.js +++ b/test/harmony.js @@ -5927,6 +5927,46 @@ data = { } }, + 'async function test() {\n await (foo ? bar : quux);\n}': { + generateFrom: { + "type": "FunctionDeclaration", + "id": { + "type": "Identifier", + "name": "test" + }, + "params": [], + "body": { + "type": "BlockStatement", + "body": [ + { + "type": "ExpressionStatement", + "expression": { + "type": "AwaitExpression", + "argument": { + "type": "ConditionalExpression", + "test": { + "type": "Identifier", + "name": "foo" + }, + "consequent": { + "type": "Identifier", + "name": "bar" + }, + "alternate": { + "type": "Identifier", + "name": "quux" + } + } + } + } + ] + }, + "generator": false, + "expression": false, + "async": true + } + }, + 'f(async function (promise) {\n await promise;\n});': { generateFrom: { "type": "ExpressionStatement", From 4a93ffc24378722dbfd8859d633746ef5916ce86 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Tue, 19 Feb 2019 06:28:56 -0800 Subject: [PATCH 52/78] Version 1.11.1 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 74ef8939..30c90ddb 100644 --- a/package.json +++ b/package.json @@ -14,7 +14,7 @@ "escodegen.js", "package.json" ], - "version": "1.11.0", + "version": "1.11.1", "engines": { "node": ">=4.0" }, From b8df20583e9fc19345843fe43a15f90bff0062b5 Mon Sep 17 00:00:00 2001 From: Andreas Lind Date: Tue, 13 Aug 2019 04:01:20 +0200 Subject: [PATCH 53/78] Support dynamic import (take 2) (#395) * feat: support dynamic import * Add a couple of tests * Align with estree/estree#198 * Update escodegen.js Co-Authored-By: Michael Ficarra * Remove outdated "State 3" from comment * Add test of a SequenceExpression as a dynamic import source https://github.com/estools/escodegen/pull/395#discussion_r313073705 * Properly parenthesize when used with a higher precedence operator https://github.com/estools/escodegen/pull/395#discussion_r313074448 --- escodegen.js | 10 ++++- test/harmony.js | 105 +++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 113 insertions(+), 2 deletions(-) diff --git a/escodegen.js b/escodegen.js index a8d0170c..41b3850f 100644 --- a/escodegen.js +++ b/escodegen.js @@ -2434,7 +2434,15 @@ ModuleSpecifier: function (expr, precedence, flags) { return this.Literal(expr, precedence, flags); - } + }, + + ImportExpression: function(expr, precedence, flag) { + return parenthesize([ + 'import(', + this.generateExpression(expr.source, Precedence.Assignment, E_TTT), + ')' + ], Precedence.Call, precedence); + }, }; diff --git a/test/harmony.js b/test/harmony.js index 2dfeaf9e..249bf34e 100644 --- a/test/harmony.js +++ b/test/harmony.js @@ -6416,8 +6416,111 @@ data = { } } } - } + }, + + // https://github.com/tc39/proposal-dynamic-import/#import + 'dynamic import': { + "import('foo').then(quux);": { + generateFrom: { + "type": "ExpressionStatement", + "expression": { + "type": "CallExpression", + "callee": { + "type": "MemberExpression", + "object": { + "type": "ImportExpression", + "source": { + "type": "Literal", + "value": "foo" + } + }, + "property": { + "type": "Identifier", + "name": "then" + }, + "computed": false + }, + "arguments": [ + { + "type": "Identifier", + "name": "quux" + } + ] + } + } + }, + "import(('a', 'b'))": { + generateFrom: { + "type": "ImportExpression", + "source": { + "type": "SequenceExpression", + "expressions": [ + { + "type": "Literal", + "value": "a" + }, + { + "type": "Literal", + "value": "b" + } + ] + } + } + }, + + "new (import('foo'))()": { + generateFrom: { + "type": "NewExpression", + "callee": { + "type": "ImportExpression", + "source": { + "type": "Literal", + "value": "foo" + } + }, + "arguments": [] + } + }, + + "import('foo' + bar).then(quux);": { + generateFrom: { + "type": "ExpressionStatement", + "expression": { + "type": "CallExpression", + "callee": { + "type": "MemberExpression", + "object": { + "type": "ImportExpression", + "source": { + "type": "BinaryExpression", + "left": { + "type": "Literal", + "value": "foo" + }, + "operator": "+", + "right": { + "type": "Identifier", + "name": "bar" + } + } + }, + "property": { + "type": "Identifier", + "name": "then" + }, + "computed": false + }, + "arguments": [ + { + "type": "Identifier", + "name": "quux" + } + ] + } + } + } + } }; function updateDeeply(target, override) { From 124e035fa1a3e790b469041012edcb6abc2eca71 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Mon, 12 Aug 2019 19:08:40 -0700 Subject: [PATCH 54/78] Version 1.12.0 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 30c90ddb..5e649dde 100644 --- a/package.json +++ b/package.json @@ -14,7 +14,7 @@ "escodegen.js", "package.json" ], - "version": "1.11.1", + "version": "1.12.0", "engines": { "node": ">=4.0" }, From 236068453c2e3fe90df5f2e2594e2f9bca8670f1 Mon Sep 17 00:00:00 2001 From: sanex3339 Date: Fri, 3 Jan 2020 03:29:08 +0300 Subject: [PATCH 55/78] Fixed missing space between `for await` with `compact: true` --- escodegen.js | 2 +- test/harmony.js | 77 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 78 insertions(+), 1 deletion(-) diff --git a/escodegen.js b/escodegen.js index 41b3850f..26e75385 100644 --- a/escodegen.js +++ b/escodegen.js @@ -953,7 +953,7 @@ }; CodeGenerator.prototype.generateIterationForStatement = function (operator, stmt, flags) { - var result = ['for' + space + (stmt.await ? 'await' + space : '') + '('], that = this; + var result = ['for' + (stmt.await ? noEmptySpace() + 'await' : '') + space + '('], that = this; withIndent(function () { if (stmt.left.type === Syntax.VariableDeclaration) { withIndent(function () { diff --git a/test/harmony.js b/test/harmony.js index 249bf34e..45e9d67a 100644 --- a/test/harmony.js +++ b/test/harmony.js @@ -6322,6 +6322,83 @@ data = { }, + 'ES2018 for-await-of with `compact: true`': { + 'async function f(){for await(const x of ait){console.log(x);}}': { + options: { + format: { + compact: true + } + }, + generateFrom: { + "type": "FunctionDeclaration", + "id": { + "type": "Identifier", + "name": "f" + }, + "params": [], + "body": { + "type": "BlockStatement", + "body": [ + { + "type": "ForOfStatement", + "left": { + "type": "VariableDeclaration", + "declarations": [ + { + "type": "VariableDeclarator", + "id": { + "type": "Identifier", + "name": "x" + }, + "init": null + } + ], + "kind": "const" + }, + "right": { + "type": "Identifier", + "name": "ait" + }, + "body": { + "type": "BlockStatement", + "body": [ + { + "type": "ExpressionStatement", + "expression": { + "type": "CallExpression", + "callee": { + "type": "MemberExpression", + "object": { + "type": "Identifier", + "name": "console" + }, + "property": { + "type": "Identifier", + "name": "log" + }, + "computed": false + }, + "arguments": [ + { + "type": "Identifier", + "name": "x" + } + ] + } + } + ] + }, + "await": true + } + ] + }, + "generator": false, + "async": true + } + } + + }, + 'ES2018 async generator method': { 'class C {\n async *readLines(file) {\n while (!file.EOF) {\n yield await file.readLine();\n }\n }\n}': { generateFrom: { From a30ea92a3111837372648e0ab166becb442adf10 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Thu, 2 Jan 2020 17:45:08 -0800 Subject: [PATCH 56/78] Version 1.12.1 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 5e649dde..8831f71a 100644 --- a/package.json +++ b/package.json @@ -14,7 +14,7 @@ "escodegen.js", "package.json" ], - "version": "1.12.0", + "version": "1.12.1", "engines": { "node": ">=4.0" }, From 819a63b8d73dc830b84dc2e140628c26e3e52909 Mon Sep 17 00:00:00 2001 From: Tim van der Lippe Date: Tue, 24 Sep 2019 14:14:53 +0100 Subject: [PATCH 57/78] Update esprima to 4.0.1 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 8831f71a..eea60d44 100644 --- a/package.json +++ b/package.json @@ -32,7 +32,7 @@ "dependencies": { "estraverse": "^4.2.0", "esutils": "^2.0.2", - "esprima": "^3.1.3", + "esprima": "^4.0.1", "optionator": "^0.8.1" }, "optionalDependencies": { From c917cf2391d06b8ba07250689e58dff6bf5ca1ef Mon Sep 17 00:00:00 2001 From: Timofey Kachalov Date: Fri, 10 Jan 2020 05:58:08 +0300 Subject: [PATCH 58/78] Super class expression parenthesis (#404) * Added parenthesis for some `superClass` expressions * Simplify logic to enable super class expression parenthesis --- escodegen.js | 4 +- test/harmony.js | 326 ++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 328 insertions(+), 2 deletions(-) diff --git a/escodegen.js b/escodegen.js index 26e75385..26702aff 100644 --- a/escodegen.js +++ b/escodegen.js @@ -1145,7 +1145,7 @@ result = join(result, this.generateExpression(stmt.id, Precedence.Sequence, E_TTT)); } if (stmt.superClass) { - fragment = join('extends', this.generateExpression(stmt.superClass, Precedence.Assignment, E_TTT)); + fragment = join('extends', this.generateExpression(stmt.superClass, Precedence.Unary, E_TTT)); result = join(result, fragment); } result.push(space); @@ -2091,7 +2091,7 @@ result = join(result, this.generateExpression(expr.id, Precedence.Sequence, E_TTT)); } if (expr.superClass) { - fragment = join('extends', this.generateExpression(expr.superClass, Precedence.Assignment, E_TTT)); + fragment = join('extends', this.generateExpression(expr.superClass, Precedence.Unary, E_TTT)); result = join(result, fragment); } result.push(space); diff --git a/test/harmony.js b/test/harmony.js index 45e9d67a..f790c01e 100644 --- a/test/harmony.js +++ b/test/harmony.js @@ -3016,6 +3016,128 @@ data = { } }, + 'class hello extends([]||[]){}': { + options: { + format: { + compact: true, + semicolons: false + } + }, + generateFrom: { + type: 'Program', + body: [{ + type: 'ClassDeclaration', + id: { + type: 'Identifier', + name: 'hello', + range: [6, 11], + loc: { + start: { line: 1, column: 6 }, + end: { line: 1, column: 11 } + } + }, + superClass: { + type: 'LogicalExpression', + start: 47, + end: 55, + left: { + type: 'ArrayExpression', + start: 47, + end: 49, + elements: [] + }, + operator: '||', + right: { + type: 'ArrayExpression', + start: 53, + end: 55, + elements: [] + }, + }, + body: { + type: 'ClassBody', + body: [], + range: [21, 23], + loc: { + start: { line: 1, column: 21 }, + end: { line: 1, column: 23 } + } + }, + range: [0, 23], + loc: { + start: { line: 1, column: 0 }, + end: { line: 1, column: 23 } + } + }], + range: [0, 23], + loc: { + start: { line: 1, column: 0 }, + end: { line: 1, column: 23 } + } + } + }, + + 'class hello extends([]=[]){}': { + options: { + format: { + compact: true, + semicolons: false + } + }, + generateFrom: { + type: 'Program', + body: [{ + type: 'ClassDeclaration', + id: { + type: 'Identifier', + name: 'hello', + range: [6, 11], + loc: { + start: { line: 1, column: 6 }, + end: { line: 1, column: 11 } + } + }, + superClass: { + type: 'AssignmentExpression', + start: 47, + end: 55, + left: { + type: 'ArrayExpression', + start: 47, + end: 49, + elements: [] + }, + operator: '=', + right: { + type: 'ArrayExpression', + start: 53, + end: 55, + elements: [] + }, + }, + body: { + type: 'ClassBody', + body: [], + range: [21, 23], + loc: { + start: { line: 1, column: 21 }, + end: { line: 1, column: 23 } + } + }, + range: [0, 23], + loc: { + start: { line: 1, column: 0 }, + end: { line: 1, column: 23 } + } + }], + range: [0, 23], + loc: { + start: { line: 1, column: 0 }, + end: { line: 1, column: 23 } + } + } + }, + 'class hello extends[]{static[ok](){}}': { options: { format: { @@ -4125,6 +4247,210 @@ data = { } }, + '(class extends([]||[]){static[ok](){}})': { + options: { + format: { + compact: true, + semicolons: false + } + }, + generateFrom: { + type: 'Program', + body: [{ + type: 'ExpressionStatement', + expression: { + type: 'ClassExpression', + superClass: { + type: 'LogicalExpression', + start: 47, + end: 55, + left: { + type: 'ArrayExpression', + start: 47, + end: 49, + elements: [] + }, + operator: '||', + right: { + type: 'ArrayExpression', + start: 53, + end: 55, + elements: [] + }, + }, + body: { + type: 'ClassBody', + body: [{ + type: 'MethodDefinition', + key: { + type: 'Identifier', + name: 'ok', + range: [24, 26], + loc: { + start: { line: 1, column: 24 }, + end: { line: 1, column: 26 } + } + }, + value: { + type: 'FunctionExpression', + id: null, + params: [], + defaults: [], + body: { + type: 'BlockStatement', + body: [], + range: [29, 31], + loc: { + start: { line: 1, column: 29 }, + end: { line: 1, column: 31 } + } + }, + rest: null, + generator: false, + expression: false, + range: [29, 31], + loc: { + start: { line: 1, column: 29 }, + end: { line: 1, column: 31 } + } + }, + kind: '', + 'static': true, + computed: true, + range: [17, 31], + loc: { + start: { line: 1, column: 17 }, + end: { line: 1, column: 31 } + } + }], + range: [16, 32], + loc: { + start: { line: 1, column: 16 }, + end: { line: 1, column: 32 } + } + }, + range: [1, 32], + loc: { + start: { line: 1, column: 1 }, + end: { line: 1, column: 32 } + } + }, + range: [0, 33], + loc: { + start: { line: 1, column: 0 }, + end: { line: 1, column: 33 } + } + }], + range: [0, 33], + loc: { + start: { line: 1, column: 0 }, + end: { line: 1, column: 33 } + } + } + }, + + '(class extends([]=[]){static[ok](){}})': { + options: { + format: { + compact: true, + semicolons: false + } + }, + generateFrom: { + type: 'Program', + body: [{ + type: 'ExpressionStatement', + expression: { + type: 'ClassExpression', + superClass: { + type: 'AssignmentExpression', + start: 47, + end: 55, + left: { + type: 'ArrayExpression', + start: 47, + end: 49, + elements: [] + }, + operator: '=', + right: { + type: 'ArrayExpression', + start: 53, + end: 55, + elements: [] + }, + }, + body: { + type: 'ClassBody', + body: [{ + type: 'MethodDefinition', + key: { + type: 'Identifier', + name: 'ok', + range: [24, 26], + loc: { + start: { line: 1, column: 24 }, + end: { line: 1, column: 26 } + } + }, + value: { + type: 'FunctionExpression', + id: null, + params: [], + defaults: [], + body: { + type: 'BlockStatement', + body: [], + range: [29, 31], + loc: { + start: { line: 1, column: 29 }, + end: { line: 1, column: 31 } + } + }, + rest: null, + generator: false, + expression: false, + range: [29, 31], + loc: { + start: { line: 1, column: 29 }, + end: { line: 1, column: 31 } + } + }, + kind: '', + 'static': true, + computed: true, + range: [17, 31], + loc: { + start: { line: 1, column: 17 }, + end: { line: 1, column: 31 } + } + }], + range: [16, 32], + loc: { + start: { line: 1, column: 16 }, + end: { line: 1, column: 32 } + } + }, + range: [1, 32], + loc: { + start: { line: 1, column: 1 }, + end: { line: 1, column: 32 } + } + }, + range: [0, 33], + loc: { + start: { line: 1, column: 0 }, + end: { line: 1, column: 33 } + } + }], + range: [0, 33], + loc: { + start: { line: 1, column: 0 }, + end: { line: 1, column: 33 } + } + } + }, + '(class extends"hello"{static[ok](){}})': { options: { format: { From fb7b56f5c96082c045fd93ca59123a66d41915cc Mon Sep 17 00:00:00 2001 From: Timofey Kachalov Date: Sat, 11 Jan 2020 17:45:16 +0300 Subject: [PATCH 59/78] Optional catch binding support (#405) * Added support for optional-catch binding * Reverted optional catch binding condition --- escodegen.js | 20 ++-- package.json | 2 +- test/compare-acorn-es2019.js | 92 +++++++++++++++++++ .../optional-catch-binding.expected.js | 3 + .../optional-catch-binding.expected.min.js | 1 + .../optional-catch-binding.js | 3 + 6 files changed, 112 insertions(+), 9 deletions(-) create mode 100644 test/compare-acorn-es2019.js create mode 100644 test/compare-acorn-es2019/optional-catch-binding.expected.js create mode 100644 test/compare-acorn-es2019/optional-catch-binding.expected.min.js create mode 100644 test/compare-acorn-es2019/optional-catch-binding.js diff --git a/escodegen.js b/escodegen.js index 26702aff..855e2182 100644 --- a/escodegen.js +++ b/escodegen.js @@ -1176,15 +1176,19 @@ withIndent(function () { var guard; - result = [ - 'catch' + space + '(', - that.generateExpression(stmt.param, Precedence.Sequence, E_TTT), - ')' - ]; + if (stmt.param) { + result = [ + 'catch' + space + '(', + that.generateExpression(stmt.param, Precedence.Sequence, E_TTT), + ')' + ]; - if (stmt.guard) { - guard = that.generateExpression(stmt.guard, Precedence.Sequence, E_TTT); - result.splice(2, 0, ' if ', guard); + if (stmt.guard) { + guard = that.generateExpression(stmt.guard, Precedence.Sequence, E_TTT); + result.splice(2, 0, ' if ', guard); + } + } else { + result = ['catch']; } }); result.push(this.maybeBlock(stmt.body, S_TFFF)); diff --git a/package.json b/package.json index eea60d44..73f97053 100644 --- a/package.json +++ b/package.json @@ -39,7 +39,7 @@ "source-map": "~0.6.1" }, "devDependencies": { - "acorn": "^4.0.4", + "acorn": "^7.1.0", "bluebird": "^3.4.7", "bower-registry-client": "^1.0.0", "chai": "^3.5.0", diff --git a/test/compare-acorn-es2019.js b/test/compare-acorn-es2019.js new file mode 100644 index 00000000..cddce0d3 --- /dev/null +++ b/test/compare-acorn-es2019.js @@ -0,0 +1,92 @@ +/* + Copyright (C) 2012-2013 Yusuke Suzuki + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY + DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +'use strict'; + +var fs = require('fs'), + acorn = require('acorn'), + escodegen = require('./loader'), + chai = require('chai'), + expect = chai.expect; + +function test(code, expected) { + var tree, actual, options, StringObject; + + // alias, so that JSLint does not complain. + StringObject = String; + + options = { + ranges: true, + locations: false, + ecmaVersion: 10 + }; + + tree = acorn.parse(code, options); + + // for UNIX text comment + actual = escodegen.generate(tree).replace(/[\n\r]$/, '') + '\n'; + expect(actual).to.be.equal(expected); +} + +function testMin(code, expected) { + var tree, actual, options, StringObject; + + // alias, so that JSLint does not complain. + StringObject = String; + + options = { + ranges: true, + locations: false, + ecmaVersion: 10 + }; + + tree = acorn.parse(code, options); + + // for UNIX text comment + actual = escodegen.generate(tree, { + format: escodegen.FORMAT_MINIFY, + raw: false + }).replace(/[\n\r]$/, '') + '\n'; + expect(actual).to.be.equal(expected); +} + +describe('compare acorn es2019 test', function () { + fs.readdirSync(__dirname + '/compare-acorn-es2019').sort().forEach(function(file) { + var code, expected, exp, min; + if (/\.js$/.test(file) && !/expected\.js$/.test(file) && !/expected\.min\.js$/.test(file)) { + it(file, function () { + exp = file.replace(/\.js$/, '.expected.js'); + min = file.replace(/\.js$/, '.expected.min.js'); + code = fs.readFileSync(__dirname + '/compare-acorn-es2019/' + file, 'utf-8'); + expected = fs.readFileSync(__dirname + '/compare-acorn-es2019/' + exp, 'utf-8'); + test(code, expected); + if (fs.existsSync(__dirname + '/compare-acorn-es2019/' + min)) { + expected = fs.readFileSync(__dirname + '/compare-acorn-es2019/' + min, 'utf-8'); + testMin(code, expected); + } + }); + } + }); +}); +/* vim: set sw=4 ts=4 et tw=80 : */ diff --git a/test/compare-acorn-es2019/optional-catch-binding.expected.js b/test/compare-acorn-es2019/optional-catch-binding.expected.js new file mode 100644 index 00000000..8548a1c4 --- /dev/null +++ b/test/compare-acorn-es2019/optional-catch-binding.expected.js @@ -0,0 +1,3 @@ +try { +} catch { +} diff --git a/test/compare-acorn-es2019/optional-catch-binding.expected.min.js b/test/compare-acorn-es2019/optional-catch-binding.expected.min.js new file mode 100644 index 00000000..30fa5a42 --- /dev/null +++ b/test/compare-acorn-es2019/optional-catch-binding.expected.min.js @@ -0,0 +1 @@ +try{}catch{} diff --git a/test/compare-acorn-es2019/optional-catch-binding.js b/test/compare-acorn-es2019/optional-catch-binding.js new file mode 100644 index 00000000..8548a1c4 --- /dev/null +++ b/test/compare-acorn-es2019/optional-catch-binding.js @@ -0,0 +1,3 @@ +try { +} catch { +} From 6eb8e31e26ab4a7b7152f4152940438696cf0d70 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?F=C3=A1bio=20Santos?= Date: Sat, 18 Jan 2020 04:16:19 +0000 Subject: [PATCH 60/78] support 'regex' property when 'value' is null (#396) --- escodegen.js | 7 ++++--- test/test.js | 26 ++++++++++++++++++++++++++ 2 files changed, 30 insertions(+), 3 deletions(-) diff --git a/escodegen.js b/escodegen.js index 855e2182..ec612d1f 100644 --- a/escodegen.js +++ b/escodegen.js @@ -2312,6 +2312,10 @@ } } + if (expr.regex) { + return '/' + expr.regex.pattern + '/' + expr.regex.flags; + } + if (expr.value === null) { return 'null'; } @@ -2328,9 +2332,6 @@ return expr.value ? 'true' : 'false'; } - if (expr.regex) { - return '/' + expr.regex.pattern + '/' + expr.regex.flags; - } return generateRegExp(expr.value); }, diff --git a/test/test.js b/test/test.js index a21cd487..c2baaafa 100644 --- a/test/test.js +++ b/test/test.js @@ -4429,6 +4429,32 @@ data = { value: '/[P QR]/\\g', range: [8, 18] }] + }, + + 'var x = /foo/i;': { + generateFrom: { + type: 'Program', + body: [{ + type: 'VariableDeclaration', + kind: 'var', + declarations: [{ + type: 'VariableDeclarator', + id: { + type: 'Identifier', + name: 'x', + }, + init: { + type: 'Literal', + value: null, + raw: '/foo/i', + regex: { + pattern: 'foo', + flags: 'i' + } + }, + }] + }], + } } }, From ba40e5cf26b6f4085d6665dbee1334d32ee68084 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Fri, 17 Jan 2020 20:23:05 -0800 Subject: [PATCH 61/78] Version 1.13.0 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 73f97053..9f6f0684 100644 --- a/package.json +++ b/package.json @@ -14,7 +14,7 @@ "escodegen.js", "package.json" ], - "version": "1.12.1", + "version": "1.13.0", "engines": { "node": ">=4.0" }, From a25d531144eda4e1a34415d504b4262c4a88710f Mon Sep 17 00:00:00 2001 From: Timofey Kachalov Date: Wed, 5 Feb 2020 22:06:23 +0300 Subject: [PATCH 62/78] Exponentiation operator (#407) * Fixed exponentiation operator precedence * Fixed and added test cases for LHS expression of exponentiation operator * fix exponentiation PR Co-authored-by: Michael Ficarra --- escodegen.js | 28 +++--- test/compare-acorn-es7.js | 92 +++++++++++++++++++ .../exponentiation-precedence.expected.js | 9 ++ .../exponentiation-precedence.js | 12 +++ 4 files changed, 129 insertions(+), 12 deletions(-) create mode 100644 test/compare-acorn-es7.js create mode 100644 test/compare-acorn-es7/exponentiation-precedence.expected.js create mode 100644 test/compare-acorn-es7/exponentiation-precedence.js diff --git a/escodegen.js b/escodegen.js index ec612d1f..16a05b17 100644 --- a/escodegen.js +++ b/escodegen.js @@ -95,14 +95,15 @@ BitwiseSHIFT: 10, Additive: 11, Multiplicative: 12, - Await: 13, - Unary: 13, - Postfix: 14, - Call: 15, - New: 16, - TaggedTemplate: 17, - Member: 18, - Primary: 19 + Exponentiation: 13, + Await: 14, + Unary: 14, + Postfix: 15, + Call: 16, + New: 17, + TaggedTemplate: 18, + Member: 19, + Primary: 20 }; BinaryPrecedence = { @@ -130,7 +131,8 @@ '-': Precedence.Additive, '*': Precedence.Multiplicative, '%': Precedence.Multiplicative, - '/': Precedence.Multiplicative + '/': Precedence.Multiplicative, + '**': Precedence.Exponentiation }; //Flags @@ -1831,14 +1833,16 @@ }, BinaryExpression: function (expr, precedence, flags) { - var result, currentPrecedence, fragment, leftSource; + var result, leftPrecedence, rightPrecedence, currentPrecedence, fragment, leftSource; currentPrecedence = BinaryPrecedence[expr.operator]; + leftPrecedence = expr.operator === '**' ? Precedence.Postfix : currentPrecedence + 1; + rightPrecedence = expr.operator === '**' ? currentPrecedence : currentPrecedence + 1; if (currentPrecedence < precedence) { flags |= F_ALLOW_IN; } - fragment = this.generateExpression(expr.left, currentPrecedence, flags); + fragment = this.generateExpression(expr.left, leftPrecedence, flags); leftSource = fragment.toString(); @@ -1848,7 +1852,7 @@ result = join(fragment, expr.operator); } - fragment = this.generateExpression(expr.right, currentPrecedence + 1, flags); + fragment = this.generateExpression(expr.right, rightPrecedence, flags); if (expr.operator === '/' && fragment.toString().charAt(0) === '/' || expr.operator.slice(-1) === '<' && fragment.toString().slice(0, 3) === '!--') { diff --git a/test/compare-acorn-es7.js b/test/compare-acorn-es7.js new file mode 100644 index 00000000..ee7b2405 --- /dev/null +++ b/test/compare-acorn-es7.js @@ -0,0 +1,92 @@ +/* + Copyright (C) 2012-2013 Yusuke Suzuki + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY + DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +'use strict'; + +var fs = require('fs'), + acorn = require('acorn'), + escodegen = require('./loader'), + chai = require('chai'), + expect = chai.expect; + +function test(code, expected) { + var tree, actual, options, StringObject; + + // alias, so that JSLint does not complain. + StringObject = String; + + options = { + ranges: true, + locations: false, + ecmaVersion: 7 + }; + + tree = acorn.parse(code, options); + + // for UNIX text comment + actual = escodegen.generate(tree).replace(/[\n\r]$/, '') + '\n'; + expect(actual).to.be.equal(expected); +} + +function testMin(code, expected) { + var tree, actual, options, StringObject; + + // alias, so that JSLint does not complain. + StringObject = String; + + options = { + ranges: true, + locations: false, + ecmaVersion: 7 + }; + + tree = acorn.parse(code, options); + + // for UNIX text comment + actual = escodegen.generate(tree, { + format: escodegen.FORMAT_MINIFY, + raw: false + }).replace(/[\n\r]$/, '') + '\n'; + expect(actual).to.be.equal(expected); +} + +describe('compare acorn es7 test', function () { + fs.readdirSync(__dirname + '/compare-acorn-es7').sort().forEach(function(file) { + var code, expected, exp, min; + if (/\.js$/.test(file) && !/expected\.js$/.test(file) && !/expected\.min\.js$/.test(file)) { + it(file, function () { + exp = file.replace(/\.js$/, '.expected.js'); + min = file.replace(/\.js$/, '.expected.min.js'); + code = fs.readFileSync(__dirname + '/compare-acorn-es7/' + file, 'utf-8'); + expected = fs.readFileSync(__dirname + '/compare-acorn-es7/' + exp, 'utf-8'); + test(code, expected); + if (fs.existsSync(__dirname + '/compare-acorn-es7/' + min)) { + expected = fs.readFileSync(__dirname + '/compare-acorn-es7/' + min, 'utf-8'); + testMin(code, expected); + } + }); + } + }); +}); +/* vim: set sw=4 ts=4 et tw=80 : */ diff --git a/test/compare-acorn-es7/exponentiation-precedence.expected.js b/test/compare-acorn-es7/exponentiation-precedence.expected.js new file mode 100644 index 00000000..99f90256 --- /dev/null +++ b/test/compare-acorn-es7/exponentiation-precedence.expected.js @@ -0,0 +1,9 @@ +x ** y * z; +x ** (y * z); +(x * y) ** z; +x * y ** z; +x ** y ** z; +(x ** y) ** z; +(-1) ** 0; +a++ ** b; +0 ** -1; diff --git a/test/compare-acorn-es7/exponentiation-precedence.js b/test/compare-acorn-es7/exponentiation-precedence.js new file mode 100644 index 00000000..4a35c41b --- /dev/null +++ b/test/compare-acorn-es7/exponentiation-precedence.js @@ -0,0 +1,12 @@ +(x ** y) * z; +x ** (y * z); + +(x * y) ** z; +x * (y ** z); + +x ** (y ** z); +(x ** y) ** z; + +(-1) ** 0; +a++ ** b; +0 ** (-1); From 86d000655235dae368fedeb845b8d00ae71b94b0 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Wed, 5 Feb 2020 15:49:41 -1000 Subject: [PATCH 63/78] Version 1.14.0 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 9f6f0684..4c8f9346 100644 --- a/package.json +++ b/package.json @@ -14,7 +14,7 @@ "escodegen.js", "package.json" ], - "version": "1.13.0", + "version": "1.14.0", "engines": { "node": ">=4.0" }, From 90f59c2df9cc1790611ee25cd26615f8bbf13cf9 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Wed, 5 Feb 2020 16:06:16 -1000 Subject: [PATCH 64/78] fix unnecessary parentheses for binary operators and add regression test --- escodegen.js | 2 +- test/compare/binary-precedence.expected.js | 4 ++++ test/compare/binary-precedence.js | 4 ++++ 3 files changed, 9 insertions(+), 1 deletion(-) create mode 100644 test/compare/binary-precedence.expected.js create mode 100644 test/compare/binary-precedence.js diff --git a/escodegen.js b/escodegen.js index 16a05b17..6fe6646d 100644 --- a/escodegen.js +++ b/escodegen.js @@ -1835,7 +1835,7 @@ BinaryExpression: function (expr, precedence, flags) { var result, leftPrecedence, rightPrecedence, currentPrecedence, fragment, leftSource; currentPrecedence = BinaryPrecedence[expr.operator]; - leftPrecedence = expr.operator === '**' ? Precedence.Postfix : currentPrecedence + 1; + leftPrecedence = expr.operator === '**' ? Precedence.Postfix : currentPrecedence; rightPrecedence = expr.operator === '**' ? currentPrecedence : currentPrecedence + 1; if (currentPrecedence < precedence) { diff --git a/test/compare/binary-precedence.expected.js b/test/compare/binary-precedence.expected.js new file mode 100644 index 00000000..8a27b70e --- /dev/null +++ b/test/compare/binary-precedence.expected.js @@ -0,0 +1,4 @@ +a + b + c; +a + (b + c); +a + b * c; +a * b + c; diff --git a/test/compare/binary-precedence.js b/test/compare/binary-precedence.js new file mode 100644 index 00000000..37c87fae --- /dev/null +++ b/test/compare/binary-precedence.js @@ -0,0 +1,4 @@ +(a + b) + c; +a + (b + c); +a + b * c; +a * b + c; From a3b67181696def5f1f02110c505f48f5e2b4a75d Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Wed, 5 Feb 2020 16:07:21 -1000 Subject: [PATCH 65/78] Version 1.14.1 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 4c8f9346..3ad946fd 100644 --- a/package.json +++ b/package.json @@ -14,7 +14,7 @@ "escodegen.js", "package.json" ], - "version": "1.14.0", + "version": "1.14.1", "engines": { "node": ">=4.0" }, From c62cbe2d609e692ea5751a44128d9ade5c877cda Mon Sep 17 00:00:00 2001 From: Timofey Kachalov Date: Thu, 4 Jun 2020 00:55:49 +0300 Subject: [PATCH 66/78] fixed multiline decision for object patterns with rest elements (#408) Co-authored-by: Timofey Kachalov Co-authored-by: sanex3339 --- escodegen.js | 10 +- test/harmony.js | 257 ++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 265 insertions(+), 2 deletions(-) diff --git a/escodegen.js b/escodegen.js index 6fe6646d..3e1a207e 100644 --- a/escodegen.js +++ b/escodegen.js @@ -2223,13 +2223,19 @@ multiline = false; if (expr.properties.length === 1) { property = expr.properties[0]; - if (property.value.type !== Syntax.Identifier) { + if ( + property.type === Syntax.Property + && property.value.type !== Syntax.Identifier + ) { multiline = true; } } else { for (i = 0, iz = expr.properties.length; i < iz; ++i) { property = expr.properties[i]; - if (!property.shorthand) { + if ( + property.type === Syntax.Property + && !property.shorthand + ) { multiline = true; break; } diff --git a/test/harmony.js b/test/harmony.js index f790c01e..833a0fbd 100644 --- a/test/harmony.js +++ b/test/harmony.js @@ -2548,6 +2548,263 @@ data = { } }, + 'Harmony object pattern, singleline, 1 property: RestElement': { + 'const {...foo} = {};': { + generateFrom: { + type: 'Program', + body: [ + { + type: 'VariableDeclaration', + declarations: [ + { + type: 'VariableDeclarator', + id: { + type: 'ObjectPattern', + properties: [ + { + type: 'RestElement', + 'argument': { + type: 'Identifier', + name: 'foo' + } + } + ] + }, + init: { + type: 'ObjectExpression', + properties: [] + } + } + ], + kind: 'const' + } + ], + sourceType: "script" + } + } + }, + + 'Harmony object pattern, singleline, 2 properties: Property, Property': { + 'const {foo, bar} = {};': { + generateFrom: { + type: 'Program', + body: [ + { + type: 'VariableDeclaration', + declarations: [ + { + type: 'VariableDeclarator', + id: { + type: 'ObjectPattern', + properties: [ + { + type: 'Property', + method: false, + shorthand: true, + computed: false, + key: { + type: 'Identifier', + name: 'foo' + }, + kind: 'init', + value: { + type: 'Identifier', + name: 'foo' + } + }, + { + type: 'Property', + method: false, + shorthand: true, + computed: false, + key: { + type: 'Identifier', + name: 'bar' + }, + kind: 'init', + value: { + type: 'Identifier', + name: 'bar' + } + }, + ] + }, + init: { + type: 'ObjectExpression', + properties: [] + } + } + ], + kind: 'const' + } + ], + sourceType: "script" + } + } + }, + + 'Harmony object pattern, singleline, 2 properties: Property, RestElement': { + 'const {foo, ...bar} = {};': { + generateFrom: { + type: 'Program', + body: [ + { + type: 'VariableDeclaration', + declarations: [ + { + type: 'VariableDeclarator', + id: { + type: 'ObjectPattern', + properties: [ + { + type: 'Property', + method: false, + shorthand: true, + computed: false, + key: { + type: 'Identifier', + name: 'foo' + }, + kind: 'init', + value: { + type: 'Identifier', + name: 'foo' + } + }, + { + type: 'RestElement', + 'argument': { + type: 'Identifier', + name: 'bar' + } + } + ] + }, + init: { + type: 'ObjectExpression', + properties: [] + } + } + ], + kind: 'const' + } + ], + sourceType: "script" + } + } + }, + + 'Harmony object pattern, multiline, 1 property: Property': { + 'const {\n foo = 1\n} = {};': { + generateFrom: { + type: 'Program', + body: [ + { + type: 'VariableDeclaration', + declarations: [ + { + type: 'VariableDeclarator', + id: { + type: 'ObjectPattern', + properties: [ + { + type: 'Property', + method: false, + shorthand: true, + computed: false, + key: { + type: 'Identifier', + name: 'foo' + }, + kind: 'init', + value: { + type: 'AssignmentPattern', + left: { + type: 'Identifier', + name: 'foo' + }, + right: { + type: 'Literal', + value: 1, + raw: '1' + } + } + } + ] + }, + init: { + type: 'ObjectExpression', + properties: [] + } + } + ], + kind: 'const' + } + ], + sourceType: "script" + } + } + }, + + 'Harmony object pattern, multiline, 2 properties: Property, Property': { + 'const {\n foo: bar,\n baz\n} = {};': { + generateFrom: { + type: 'Program', + body: [ + { + type: 'VariableDeclaration', + declarations: [ + { + type: 'VariableDeclarator', + id: { + type: 'ObjectPattern', + properties: [ + { + type: 'Property', + method: false, + shorthand: false, + computed: false, + key: { + type: 'Identifier', + name: 'foo' + }, + kind: 'init', + value: { + type: 'Identifier', + name: 'bar' + } + }, + { + type: 'Property', + method: false, + shorthand: true, + computed: false, + key: { + type: 'Identifier', + name: 'baz' + }, + kind: 'init', + value: { + type: 'Identifier', + name: 'baz' + } + }, + ] + }, + init: { + type: 'ObjectExpression', + properties: [] + } + } + ], + kind: 'const' + } + ], + sourceType: "script" + } + } + }, + 'Harmony method property': { 'var obj = { test() { } }': { type: 'Program', From 1d85742ead2f995e9fe684b0866cbc2de668790e Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Wed, 3 Jun 2020 14:56:48 -0700 Subject: [PATCH 67/78] Version 1.14.2 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 3ad946fd..1701bcc1 100644 --- a/package.json +++ b/package.json @@ -14,7 +14,7 @@ "escodegen.js", "package.json" ], - "version": "1.14.1", + "version": "1.14.2", "engines": { "node": ">=4.0" }, From 177ec89f93859c0873e67cb9fc5abacd9a421f83 Mon Sep 17 00:00:00 2001 From: Brian Maher Date: Mon, 8 Jun 2020 13:22:22 -0700 Subject: [PATCH 68/78] Add copyright information to LICENSE file (#414) ...matches the README. --- LICENSE.BSD | 2 ++ 1 file changed, 2 insertions(+) diff --git a/LICENSE.BSD b/LICENSE.BSD index 3e580c35..426019dc 100644 --- a/LICENSE.BSD +++ b/LICENSE.BSD @@ -1,3 +1,5 @@ +Copyright (C) 2012 Yusuke Suzuki (twitter: @Constellation) and other contributors. + Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: From eee573bee25bcc42ef405e685d6930eda62e33de Mon Sep 17 00:00:00 2001 From: Timofey Kachalov Date: Tue, 23 Jun 2020 02:05:37 +0300 Subject: [PATCH 69/78] fixed precedence of sequence expression in computed property name (#415) Co-authored-by: sanex3339 --- escodegen.js | 2 +- test/compare-acorn-es6/class-declaration.expected.js | 12 ++++++++++++ .../class-declaration.expected.min.js | 1 + test/compare-acorn-es6/class-declaration.js | 9 +++++++++ 4 files changed, 23 insertions(+), 1 deletion(-) create mode 100644 test/compare-acorn-es6/class-declaration.expected.js create mode 100644 test/compare-acorn-es6/class-declaration.expected.min.js create mode 100644 test/compare-acorn-es6/class-declaration.js diff --git a/escodegen.js b/escodegen.js index 3e1a207e..4c055b88 100644 --- a/escodegen.js +++ b/escodegen.js @@ -983,7 +983,7 @@ result.push('['); } - result.push(this.generateExpression(expr, Precedence.Sequence, E_TTT)); + result.push(this.generateExpression(expr, Precedence.Assignment, E_TTT)); if (computed) { result.push(']'); diff --git a/test/compare-acorn-es6/class-declaration.expected.js b/test/compare-acorn-es6/class-declaration.expected.js new file mode 100644 index 00000000..abc86a65 --- /dev/null +++ b/test/compare-acorn-es6/class-declaration.expected.js @@ -0,0 +1,12 @@ +class ComputedKey { + [n1 + n2]() { + } +} +class AssignmentExpressionAsKey { + [n1 = n2]() { + } +} +class SequenceExpressionAsKey { + [(n1, n2)]() { + } +} diff --git a/test/compare-acorn-es6/class-declaration.expected.min.js b/test/compare-acorn-es6/class-declaration.expected.min.js new file mode 100644 index 00000000..496f2f81 --- /dev/null +++ b/test/compare-acorn-es6/class-declaration.expected.min.js @@ -0,0 +1 @@ +class ComputedKey{[n1+n2](){}}class AssignmentExpressionAsKey{[n1=n2](){}}class SequenceExpressionAsKey{[(n1,n2)](){}} diff --git a/test/compare-acorn-es6/class-declaration.js b/test/compare-acorn-es6/class-declaration.js new file mode 100644 index 00000000..db15285f --- /dev/null +++ b/test/compare-acorn-es6/class-declaration.js @@ -0,0 +1,9 @@ +class ComputedKey { + [n1 + n2]() {} +} +class AssignmentExpressionAsKey { + [n1 = n2]() {} +} +class SequenceExpressionAsKey { + [(n1, n2)]() {} +} \ No newline at end of file From dc2993cd6a4b295b16d38c3f03138c8e89a32337 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Mon, 22 Jun 2020 16:14:32 -0700 Subject: [PATCH 70/78] Version 1.14.3 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 1701bcc1..51ee0d86 100644 --- a/package.json +++ b/package.json @@ -14,7 +14,7 @@ "escodegen.js", "package.json" ], - "version": "1.14.2", + "version": "1.14.3", "engines": { "node": ">=4.0" }, From ff550a81aad45b85510275632c1262619d6242d3 Mon Sep 17 00:00:00 2001 From: Timofey Kachalov Date: Wed, 5 Aug 2020 21:41:00 +0300 Subject: [PATCH 71/78] drop support for node <6 (#419) Co-authored-by: sanex3339 --- .travis.yml | 2 +- package.json | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/.travis.yml b/.travis.yml index 921e6c86..c60f507f 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,6 +1,6 @@ sudo: false language: node_js node_js: - - "4" - "6" - "8" + - "10" diff --git a/package.json b/package.json index 51ee0d86..a2adedd6 100644 --- a/package.json +++ b/package.json @@ -16,7 +16,7 @@ ], "version": "1.14.3", "engines": { - "node": ">=4.0" + "node": ">=6.0" }, "maintainers": [ { From e8e2e81675ce74a6f538ad0274fd72ada26fb17d Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Wed, 5 Aug 2020 15:57:12 -0700 Subject: [PATCH 72/78] Update .gitattributes --- .gitattributes | 2 ++ 1 file changed, 2 insertions(+) diff --git a/.gitattributes b/.gitattributes index 8d808579..18da061f 100644 --- a/.gitattributes +++ b/.gitattributes @@ -1 +1,3 @@ test/3rdparty/**/* -crlf -diff +# don't collapse diffs of test expectations +test/compare-*/*.expected.min.js -linguist-generated From 1d192aef5d6bd42c960e4426bc84bcb161318df9 Mon Sep 17 00:00:00 2001 From: Timofey Kachalov Date: Thu, 6 Aug 2020 02:11:45 +0300 Subject: [PATCH 73/78] add support for optional chaining (#412) Co-authored-by: sanex3339 --- escodegen.js | 39 ++++++-- package.json | 7 +- test/compare-acorn-es2020.js | 95 +++++++++++++++++++ .../optional-chaining.expected.js | 47 +++++++++ .../optional-chaining.expected.min.js | 1 + .../compare-acorn-es2020/optional-chaining.js | 47 +++++++++ 6 files changed, 224 insertions(+), 12 deletions(-) create mode 100644 test/compare-acorn-es2020.js create mode 100644 test/compare-acorn-es2020/optional-chaining.expected.js create mode 100644 test/compare-acorn-es2020/optional-chaining.expected.min.js create mode 100644 test/compare-acorn-es2020/optional-chaining.js diff --git a/escodegen.js b/escodegen.js index 4c055b88..847fc370 100644 --- a/escodegen.js +++ b/escodegen.js @@ -99,11 +99,12 @@ Await: 14, Unary: 14, Postfix: 15, - Call: 16, - New: 17, - TaggedTemplate: 18, - Member: 19, - Primary: 20 + OptionalChaining: 16, + Call: 17, + New: 18, + TaggedTemplate: 19, + Member: 20, + Primary: 21 }; BinaryPrecedence = { @@ -1871,8 +1872,14 @@ CallExpression: function (expr, precedence, flags) { var result, i, iz; + // F_ALLOW_UNPARATH_NEW becomes false. result = [this.generateExpression(expr.callee, Precedence.Call, E_TTF)]; + + if (expr.optional) { + result.push('?.'); + } + result.push('('); for (i = 0, iz = expr['arguments'].length; i < iz; ++i) { result.push(this.generateExpression(expr['arguments'][i], Precedence.Assignment, E_TTT)); @@ -1885,9 +1892,20 @@ if (!(flags & F_ALLOW_CALL)) { return ['(', result, ')']; } + return parenthesize(result, Precedence.Call, precedence); }, + ChainExpression: function (expr, precedence, flags) { + if (Precedence.OptionalChaining < precedence) { + flags |= F_ALLOW_CALL; + } + + var result = this.generateExpression(expr.expression, Precedence.OptionalChaining, flags); + + return parenthesize(result, Precedence.OptionalChaining, precedence); + }, + NewExpression: function (expr, precedence, flags) { var result, length, i, iz, itemFlags; length = expr['arguments'].length; @@ -1922,11 +1940,15 @@ result = [this.generateExpression(expr.object, Precedence.Call, (flags & F_ALLOW_CALL) ? E_TTF : E_TFF)]; if (expr.computed) { + if (expr.optional) { + result.push('?.'); + } + result.push('['); result.push(this.generateExpression(expr.property, Precedence.Sequence, flags & F_ALLOW_CALL ? E_TTT : E_TFT)); result.push(']'); } else { - if (expr.object.type === Syntax.Literal && typeof expr.object.value === 'number') { + if (!expr.optional && expr.object.type === Syntax.Literal && typeof expr.object.value === 'number') { fragment = toSourceNodeWhenNeeded(result).toString(); // When the following conditions are all true, // 1. No floating point @@ -1943,7 +1965,7 @@ result.push(' '); } } - result.push('.'); + result.push(expr.optional ? '?.' : '.'); result.push(generateIdentifier(expr.property)); } @@ -2457,8 +2479,7 @@ this.generateExpression(expr.source, Precedence.Assignment, E_TTT), ')' ], Precedence.Call, precedence); - }, - + } }; merge(CodeGenerator.prototype, CodeGenerator.Expression); diff --git a/package.json b/package.json index a2adedd6..5e5c8e7a 100644 --- a/package.json +++ b/package.json @@ -30,7 +30,7 @@ "url": "http://github.com/estools/escodegen.git" }, "dependencies": { - "estraverse": "^4.2.0", + "estraverse": "^5.2.0", "esutils": "^2.0.2", "esprima": "^4.0.1", "optionator": "^0.8.1" @@ -39,10 +39,11 @@ "source-map": "~0.6.1" }, "devDependencies": { - "acorn": "^7.1.0", + "acorn": "^7.3.1", "bluebird": "^3.4.7", "bower-registry-client": "^1.0.0", - "chai": "^3.5.0", + "chai": "^4.2.0", + "chai-exclude": "^2.0.2", "commonjs-everywhere": "^0.9.7", "gulp": "^3.8.10", "gulp-eslint": "^3.0.1", diff --git a/test/compare-acorn-es2020.js b/test/compare-acorn-es2020.js new file mode 100644 index 00000000..f5bfd123 --- /dev/null +++ b/test/compare-acorn-es2020.js @@ -0,0 +1,95 @@ +/* + Copyright (C) 2012-2013 Yusuke Suzuki + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY + DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +'use strict'; + +var fs = require('fs'), + acorn = require('acorn'), + escodegen = require('./loader'), + chai = require('chai'), + chaiExclude = require('chai-exclude'), + expect = chai.expect; + +chai.use(chaiExclude); + +function test(code, expected) { + var tree, actual, actualTree, options; + + options = { + ranges: false, + locations: false, + ecmaVersion: 11 + }; + + tree = acorn.parse(code, options); + + // for UNIX text comment + actual = escodegen.generate(tree); + actualTree = acorn.parse(actual, options); + + expect(actual).to.be.equal(expected); + expect(tree).excludingEvery(['start', 'end']).to.deep.equal(actualTree); +} + +function testMin(code, expected) { + var tree, actual, actualTree, options; + + options = { + ranges: false, + locations: false, + ecmaVersion: 11 + }; + + tree = acorn.parse(code, options); + + // for UNIX text comment + actual = escodegen.generate(tree, { + format: escodegen.FORMAT_MINIFY, + raw: false + }).replace(/[\n\r]$/, '') + '\n'; + actualTree = acorn.parse(actual, options); + + expect(actual).to.be.equal(expected); + expect(tree).excludingEvery(['start', 'end']).to.deep.equal(actualTree); +} + +describe('compare acorn es2020 test', function () { + fs.readdirSync(__dirname + '/compare-acorn-es2020').sort().forEach(function(file) { + var code, expected, exp, min; + if (/\.js$/.test(file) && !/expected\.js$/.test(file) && !/expected\.min\.js$/.test(file)) { + it(file, function () { + exp = file.replace(/\.js$/, '.expected.js'); + min = file.replace(/\.js$/, '.expected.min.js'); + code = fs.readFileSync(__dirname + '/compare-acorn-es2020/' + file, 'utf-8'); + expected = fs.readFileSync(__dirname + '/compare-acorn-es2020/' + exp, 'utf-8'); + test(code, expected); + if (fs.existsSync(__dirname + '/compare-acorn-es2020/' + min)) { + expected = fs.readFileSync(__dirname + '/compare-acorn-es2020/' + min, 'utf-8'); + testMin(code, expected); + } + }); + } + }); +}); +/* vim: set sw=4 ts=4 et tw=80 : */ \ No newline at end of file diff --git a/test/compare-acorn-es2020/optional-chaining.expected.js b/test/compare-acorn-es2020/optional-chaining.expected.js new file mode 100644 index 00000000..7428f592 --- /dev/null +++ b/test/compare-acorn-es2020/optional-chaining.expected.js @@ -0,0 +1,47 @@ +obj.aaa.bbb; +obj.aaa?.bbb; +obj?.aaa.bbb; +obj?.aaa?.bbb; +obj.aaa.bbb; +obj.aaa?.bbb; +(obj?.aaa).bbb; +(obj?.aaa)?.bbb; +(obj?.aaa).bbb.ccc.ddd; +((obj?.aaa).bbb?.ccc).ddd; +(obj?.aaa)?.bbb; +obj[aaa][bbb]; +obj[aaa]?.[bbb]; +obj?.[aaa][bbb]; +obj?.[aaa]?.[bbb]; +obj[aaa][bbb]; +obj[aaa]?.[bbb]; +(obj?.[aaa])[bbb]; +(obj?.[aaa])?.[bbb]; +obj[aaa][bbb][ccc][ddd]; +((obj?.[aaa])[bbb]?.[ccc])[ddd]; +1?.a; +obj()(); +obj()?.(); +obj?.()(); +obj?.()?.(); +obj()(); +obj()?.(); +(obj?.())(); +(obj?.())?.(); +obj()()()(); +((obj?.())()?.())(); +(a?.b)(); +a?.b(); +a?.b?.(); +(a?.b)?.(); +a?.().b; +(a?.()).b; +a?.b.c(); +(a?.b.c)(); +a.b?.().c; +(a.b?.()).c; +(a.b?.())?.c; +new (a?.b().c)(); +new (a?.b())(); +new (a?.b().c)(); +new (a?.b())(); \ No newline at end of file diff --git a/test/compare-acorn-es2020/optional-chaining.expected.min.js b/test/compare-acorn-es2020/optional-chaining.expected.min.js new file mode 100644 index 00000000..cfabe2b8 --- /dev/null +++ b/test/compare-acorn-es2020/optional-chaining.expected.min.js @@ -0,0 +1 @@ +obj.aaa.bbb;obj.aaa?.bbb;obj?.aaa.bbb;obj?.aaa?.bbb;obj.aaa.bbb;obj.aaa?.bbb;(obj?.aaa).bbb;(obj?.aaa)?.bbb;(obj?.aaa).bbb.ccc.ddd;((obj?.aaa).bbb?.ccc).ddd;(obj?.aaa)?.bbb;obj[aaa][bbb];obj[aaa]?.[bbb];obj?.[aaa][bbb];obj?.[aaa]?.[bbb];obj[aaa][bbb];obj[aaa]?.[bbb];(obj?.[aaa])[bbb];(obj?.[aaa])?.[bbb];obj[aaa][bbb][ccc][ddd];((obj?.[aaa])[bbb]?.[ccc])[ddd];1?.a;obj()();obj()?.();obj?.()();obj?.()?.();obj()();obj()?.();(obj?.())();(obj?.())?.();obj()()()();((obj?.())()?.())();(a?.b)();a?.b();a?.b?.();(a?.b)?.();a?.().b;(a?.()).b;a?.b.c();(a?.b.c)();a.b?.().c;(a.b?.()).c;(a.b?.())?.c;new(a?.b().c);new(a?.b());new(a?.b().c);new(a?.b()) diff --git a/test/compare-acorn-es2020/optional-chaining.js b/test/compare-acorn-es2020/optional-chaining.js new file mode 100644 index 00000000..584776c9 --- /dev/null +++ b/test/compare-acorn-es2020/optional-chaining.js @@ -0,0 +1,47 @@ +obj.aaa.bbb; +obj.aaa?.bbb; +obj?.aaa.bbb; +obj?.aaa?.bbb; +(obj.aaa).bbb; +(obj.aaa)?.bbb; +(obj?.aaa).bbb; +(obj?.aaa)?.bbb; +((obj?.aaa).bbb.ccc).ddd; +((obj?.aaa).bbb?.ccc).ddd; +(obj?.aaa)?.bbb; +obj[aaa][bbb]; +obj[aaa]?.[bbb]; +obj?.[aaa][bbb]; +obj?.[aaa]?.[bbb]; +(obj[aaa])[bbb]; +(obj[aaa])?.[bbb]; +(obj?.[aaa])[bbb]; +(obj?.[aaa])?.[bbb]; +((obj[aaa])[bbb][ccc])[ddd]; +((obj?.[aaa])[bbb]?.[ccc])[ddd]; +1?.a; +obj()(); +obj()?.(); +obj?.()(); +obj?.()?.(); +(obj())(); +(obj())?.(); +(obj?.())(); +(obj?.())?.(); +((obj())()())(); +((obj?.())()?.())(); +(a?.b)(); +a?.b(); +a?.b?.(); +(a?.b)?.(); +a?.().b; +(a?.()).b; +a?.b.c(); +(a?.b.c)(); +a.b?.().c; +(a.b?.()).c; +(a.b?.())?.c; +new (a?.b().c); +new (a?.b()); +new (a?.b().c)(); +new (a?.b())(); From ab53cd5489fd15c3624386465d1f7a0544cda6c8 Mon Sep 17 00:00:00 2001 From: Michael Ficarra Date: Wed, 5 Aug 2020 16:18:57 -0700 Subject: [PATCH 74/78] Version 2.0.0 --- package.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/package.json b/package.json index 5e5c8e7a..73307cc0 100644 --- a/package.json +++ b/package.json @@ -14,7 +14,7 @@ "escodegen.js", "package.json" ], - "version": "1.14.3", + "version": "2.0.0", "engines": { "node": ">=6.0" }, From 121f9a8598ff58b41a2714f7024a32092fe03290 Mon Sep 17 00:00:00 2001 From: sanex3339 Date: Fri, 12 Jun 2020 21:56:36 +0300 Subject: [PATCH 75/78] Nullish coalescing support --- escodegen.js | 32 +++++++++++++++++-- .../nullish-coalescing.expected.js | 12 +++++++ .../nullish-coalescing.expected.min.js | 1 + .../nullish-coalescing.js | 12 +++++++ 4 files changed, 55 insertions(+), 2 deletions(-) create mode 100644 test/compare-acorn-es2020/nullish-coalescing.expected.js create mode 100644 test/compare-acorn-es2020/nullish-coalescing.expected.min.js create mode 100644 test/compare-acorn-es2020/nullish-coalescing.js diff --git a/escodegen.js b/escodegen.js index 847fc370..e6903856 100644 --- a/escodegen.js +++ b/escodegen.js @@ -85,6 +85,7 @@ Assignment: 1, Conditional: 2, ArrowFunction: 2, + NullishCoalescing: 3, LogicalOR: 3, LogicalAND: 4, BitwiseOR: 5, @@ -108,6 +109,7 @@ }; BinaryPrecedence = { + '??': Precedence.NullishCoalescing, '||': Precedence.LogicalOR, '&&': Precedence.LogicalAND, '|': Precedence.BitwiseOR, @@ -1836,8 +1838,34 @@ BinaryExpression: function (expr, precedence, flags) { var result, leftPrecedence, rightPrecedence, currentPrecedence, fragment, leftSource; currentPrecedence = BinaryPrecedence[expr.operator]; - leftPrecedence = expr.operator === '**' ? Precedence.Postfix : currentPrecedence; - rightPrecedence = expr.operator === '**' ? currentPrecedence : currentPrecedence + 1; + + leftPrecedence = currentPrecedence; + rightPrecedence = currentPrecedence + 1; + + switch (expr.operator) { + case '**': + leftPrecedence = Precedence.Postfix; + rightPrecedence = currentPrecedence; + break; + + case '??': + if (expr.left.operator === '||' || expr.left.operator === '&&') { + leftPrecedence = BinaryPrecedence[expr.left.operator] + 1; + } + + if (expr.right.operator === '||' || expr.right.operator === '&&') { + rightPrecedence = BinaryPrecedence[expr.right.operator] + 1; + } + + break; + + case '||': + if (expr.left.operator === '??') { + leftPrecedence = BinaryPrecedence[expr.left.operator] + 1; + } + + break; + } if (currentPrecedence < precedence) { flags |= F_ALLOW_IN; diff --git a/test/compare-acorn-es2020/nullish-coalescing.expected.js b/test/compare-acorn-es2020/nullish-coalescing.expected.js new file mode 100644 index 00000000..874393a1 --- /dev/null +++ b/test/compare-acorn-es2020/nullish-coalescing.expected.js @@ -0,0 +1,12 @@ +a ?? b; +a ?? b ?? c; +a | b ?? c | d; +a ?? b ? c : d; +(a || b) ?? c; +a || (b ?? c); +(a && b) ?? c; +a && (b ?? c); +(a ?? b) || c; +a ?? (b || c); +(a ?? b) && c; +a ?? (b && c); \ No newline at end of file diff --git a/test/compare-acorn-es2020/nullish-coalescing.expected.min.js b/test/compare-acorn-es2020/nullish-coalescing.expected.min.js new file mode 100644 index 00000000..ecb75537 --- /dev/null +++ b/test/compare-acorn-es2020/nullish-coalescing.expected.min.js @@ -0,0 +1 @@ +a??b;a??b??c;a|b??c|d;a??b?c:d;(a||b)??c;a||(b??c);(a&&b)??c;a&&(b??c);(a??b)||c;a??(b||c);(a??b)&&c;a??(b&&c) diff --git a/test/compare-acorn-es2020/nullish-coalescing.js b/test/compare-acorn-es2020/nullish-coalescing.js new file mode 100644 index 00000000..874393a1 --- /dev/null +++ b/test/compare-acorn-es2020/nullish-coalescing.js @@ -0,0 +1,12 @@ +a ?? b; +a ?? b ?? c; +a | b ?? c | d; +a ?? b ? c : d; +(a || b) ?? c; +a || (b ?? c); +(a && b) ?? c; +a && (b ?? c); +(a ?? b) || c; +a ?? (b || c); +(a ?? b) && c; +a ?? (b && c); \ No newline at end of file From 5646f113ae78eca9046da1b8e4ea20d4baec87ad Mon Sep 17 00:00:00 2001 From: sanex Date: Mon, 24 Aug 2020 08:09:21 +0300 Subject: [PATCH 76/78] Updated nullish coalescing logic, added more tests --- escodegen.js | 4 ++-- test/compare-acorn-es2020/nullish-coalescing.expected.js | 3 +++ test/compare-acorn-es2020/nullish-coalescing.expected.min.js | 2 +- test/compare-acorn-es2020/nullish-coalescing.js | 5 ++++- 4 files changed, 10 insertions(+), 4 deletions(-) diff --git a/escodegen.js b/escodegen.js index e6903856..419e7a37 100644 --- a/escodegen.js +++ b/escodegen.js @@ -1849,11 +1849,11 @@ break; case '??': - if (expr.left.operator === '||' || expr.left.operator === '&&') { + if (expr.left.type === Syntax.LogicalExpression && (expr.left.operator === '||' || expr.left.operator === '&&')) { leftPrecedence = BinaryPrecedence[expr.left.operator] + 1; } - if (expr.right.operator === '||' || expr.right.operator === '&&') { + if (expr.right.operator === '&&') { rightPrecedence = BinaryPrecedence[expr.right.operator] + 1; } diff --git a/test/compare-acorn-es2020/nullish-coalescing.expected.js b/test/compare-acorn-es2020/nullish-coalescing.expected.js index 874393a1..5bb15e1f 100644 --- a/test/compare-acorn-es2020/nullish-coalescing.expected.js +++ b/test/compare-acorn-es2020/nullish-coalescing.expected.js @@ -2,6 +2,9 @@ a ?? b; a ?? b ?? c; a | b ?? c | d; a ?? b ? c : d; +a ? b ?? c : d; +a ? b : c ?? d; +a => b ?? c; (a || b) ?? c; a || (b ?? c); (a && b) ?? c; diff --git a/test/compare-acorn-es2020/nullish-coalescing.expected.min.js b/test/compare-acorn-es2020/nullish-coalescing.expected.min.js index ecb75537..dfefb728 100644 --- a/test/compare-acorn-es2020/nullish-coalescing.expected.min.js +++ b/test/compare-acorn-es2020/nullish-coalescing.expected.min.js @@ -1 +1 @@ -a??b;a??b??c;a|b??c|d;a??b?c:d;(a||b)??c;a||(b??c);(a&&b)??c;a&&(b??c);(a??b)||c;a??(b||c);(a??b)&&c;a??(b&&c) +a??b;a??b??c;a|b??c|d;a??b?c:d;a?b??c:d;a?b:c??d;a=>b??c;(a||b)??c;a||(b??c);(a&&b)??c;a&&(b??c);(a??b)||c;a??(b||c);(a??b)&&c;a??(b&&c) diff --git a/test/compare-acorn-es2020/nullish-coalescing.js b/test/compare-acorn-es2020/nullish-coalescing.js index 874393a1..d49d4189 100644 --- a/test/compare-acorn-es2020/nullish-coalescing.js +++ b/test/compare-acorn-es2020/nullish-coalescing.js @@ -2,6 +2,9 @@ a ?? b; a ?? b ?? c; a | b ?? c | d; a ?? b ? c : d; +a ? b ?? c : d; +a ? b : c ?? d; +a => b ?? c; (a || b) ?? c; a || (b ?? c); (a && b) ?? c; @@ -9,4 +12,4 @@ a && (b ?? c); (a ?? b) || c; a ?? (b || c); (a ?? b) && c; -a ?? (b && c); \ No newline at end of file +a ?? (b && c); From 7f97bfaaf618b515b45f1c2725a0452c8849c1d0 Mon Sep 17 00:00:00 2001 From: sanex Date: Mon, 24 Aug 2020 08:20:28 +0300 Subject: [PATCH 77/78] Added additional check for right expression type --- escodegen.js | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/escodegen.js b/escodegen.js index 419e7a37..a9b9f7cc 100644 --- a/escodegen.js +++ b/escodegen.js @@ -1853,7 +1853,7 @@ leftPrecedence = BinaryPrecedence[expr.left.operator] + 1; } - if (expr.right.operator === '&&') { + if (expr.right.type === Syntax.LogicalExpression && expr.right.operator === '&&') { rightPrecedence = BinaryPrecedence[expr.right.operator] + 1; } From 6c1bd9479f02fc37ccf28008ce7e95e2de58f93a Mon Sep 17 00:00:00 2001 From: sanex Date: Mon, 24 Aug 2020 08:48:03 +0300 Subject: [PATCH 78/78] Added additional check for left expression type --- escodegen.js | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/escodegen.js b/escodegen.js index a9b9f7cc..96a5b694 100644 --- a/escodegen.js +++ b/escodegen.js @@ -1860,7 +1860,7 @@ break; case '||': - if (expr.left.operator === '??') { + if (expr.left.type === Syntax.LogicalExpression && expr.left.operator === '??') { leftPrecedence = BinaryPrecedence[expr.left.operator] + 1; }