Refactor to C++23

.github/workflows/ci.yml

@@ -0,0 +1,88 @@
+name: CI
+
+on:
+  push:
+    branches: [master, main]
+  pull_request:
+
+jobs:
+  build-and-test:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            name: Linux (GCC 13)
+            compiler: g++-13
+            cc: gcc-13
+            cxx: g++-13
+            packages: ninja-build g++-13
+
+          - os: ubuntu-latest
+            name: Linux (Clang 17)
+            compiler: clang++-17
+            cc: clang-17
+            cxx: clang++-17
+            packages: ninja-build clang-17
+
+          - os: windows-latest
+            name: Windows (MSVC)
+            compiler: msvc
+            cc: cl
+            cxx: cl
+            packages: ""
+
+          - os: macos-latest
+            name: macOS (AppleClang)
+            compiler: appleclang
+            cc: cc
+            cxx: c++
+            packages: ninja
+
+    runs-on: ${{ matrix.os }}
+    name: ${{ matrix.name }}
+    # macOS AppleClang lacks std::views::zip and std::from_chars for doubles
+    continue-on-error: ${{ matrix.os == 'macos-latest' }}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      # -- Install CMake 4.0+ (required by the project) --
+      - name: Install CMake 4.0+ via pip
+        run: pip install "cmake>=4.0"
+
+      # -- Install platform dependencies --
+      - name: Install dependencies (Ubuntu)
+        if: runner.os == 'Linux'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y ${{ matrix.packages }}
+
+      - name: Install dependencies (macOS)
+        if: runner.os == 'macOS'
+        run: brew install ${{ matrix.packages }}
+
+      - name: Install dependencies (Windows)
+        if: runner.os == 'Windows'
+        run: choco install ninja
+
+      # -- Set up MSVC environment on Windows --
+      - name: Set up MSVC Developer Environment
+        if: runner.os == 'Windows'
+        uses: ilammy/msvc-dev-cmd@v1
+
+      # -- Configure --
+      - name: Configure CMake
+        run: >
+          cmake -B build -G Ninja
+          -DCMAKE_BUILD_TYPE=Release
+          -DCMAKE_C_COMPILER=${{ matrix.cc }}
+          -DCMAKE_CXX_COMPILER=${{ matrix.cxx }}
+
+      # -- Build --
+      - name: Build
+        run: cmake --build build
+
+      # -- Test --
+      - name: Test
+        run: ctest --test-dir build --output-on-failure

.gitignore

@@ -0,0 +1,3 @@
+build/
+.cache/
+.claude/

CMakeLists.txt

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+cmake_minimum_required(VERSION 4.0)
+project(edfio VERSION 0.2.0 LANGUAGES CXX)
+
+# ---- Header-only library target ----
+add_library(edfio INTERFACE)
+target_include_directories(edfio INTERFACE
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:include>
+)
+target_compile_features(edfio INTERFACE cxx_std_23)
+add_library(edfio::edfio ALIAS edfio)
+
+# ---- Tests ----
+option(EDFIO_BUILD_TESTS "Build tests" ON)
+if(EDFIO_BUILD_TESTS)
+    enable_testing()
+    add_subdirectory(tests)
+endif()
+
+# ---- Install targets and packaging ----
+include(GNUInstallDirs)
+include(CMakePackageConfigHelpers)
+
+install(TARGETS edfio EXPORT edfioTargets)
+install(DIRECTORY include/edfio DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+
+install(EXPORT edfioTargets
+    FILE edfioTargets.cmake
+    NAMESPACE edfio::
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/edfio
+)
+
+write_basic_package_version_file(
+    "${CMAKE_CURRENT_BINARY_DIR}/edfioConfigVersion.cmake"
+    VERSION ${PROJECT_VERSION}
+    COMPATIBILITY SameMajorVersion
+)
+
+configure_package_config_file(
+    "${CMAKE_CURRENT_SOURCE_DIR}/cmake/edfioConfig.cmake.in"
+    "${CMAKE_CURRENT_BINARY_DIR}/edfioConfig.cmake"
+    INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/edfio
+)
+
+install(FILES
+    "${CMAKE_CURRENT_BINARY_DIR}/edfioConfig.cmake"
+    "${CMAKE_CURRENT_BINARY_DIR}/edfioConfigVersion.cmake"
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/edfio
+)