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Shallow_Micro_Rust: Fix micro_rust_record not working inside locales #191

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Merged
ike-mulder-aws merged 1 commit into from
Mar 26, 2026
Merged

Shallow_Micro_Rust: Fix micro_rust_record not working inside locales #191

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13 changes: 9 additions & 4 deletions Shallow_Micro_Rust/Micro_Rust_Shallow_Embedding.thy
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Original file line number Diff line number Diff line change
Expand Up @@ -214,17 +214,22 @@ ML\<open>

(* Mimicking "instance {rec_name} :: (type, type, ...) localizable .." *)
fun instantiate_localizable_class rec_name (ctxt : Proof.context) =
let val typeargs = generic_type_arguments ctxt rec_name in
((Class.instance_arity_cmd ([rec_name], typeargs, @{class localizable})
let val typeargs = generic_type_arguments ctxt rec_name
val full_tyname = Proof_Context.read_type_name {proper = true, strict = false} ctxt rec_name
|> Term.dest_Type |> fst
in
((Class.instance_arity_cmd ([full_tyname], typeargs, @{class localizable})
#> Proof.global_default_proof
#> Proof_Context.theory_of)
|> Local_Theory.background_theory) ctxt
end
\<close>

ML\<open>
fun register_lens_with_micro_rust rec_name field =
notation_nano_rust "field" (lens_name rec_name field, field)
fun register_lens_with_micro_rust rec_name field lthy =
let val name = lens_name rec_name field
val full_name = Local_Theory.full_name lthy (Binding.name name)
in notation_nano_rust "field" (full_name, field) lthy end
fun register_lenses_with_micro_rust rec_name thy =
let val fields = get_fields rec_name thy in fold (register_lens_with_micro_rust rec_name) fields thy end

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16 changes: 16 additions & 0 deletions Shallow_Micro_Rust/Micro_Rust_Shallow_Embedding_Tests.thy
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Expand Up @@ -1754,6 +1754,22 @@ begin
value \<open>\<lbrakk> y.field3.field1 \<rbrakk>\<close>
end

subsubsection\<open>Declaring \<^verbatim>\<open>micro_rust_record\<close>s in locales\<close>
locale micro_rust_record_locale_test =
fixes answer :: \<open>64 word\<close>
assumes \<open>answer = 42\<close>
begin

datatype_record foobar =
field5 :: \<open>64 word\<close>
field6 :: \<open>64 word\<close>
micro_rust_record foobar

term \<open>\<lambda> x :: foobar. \<lbrakk> x.field5 + x.field6 \<rbrakk>\<close>
term \<open>\<lambda> x :: ('addr, 'fv, foobar) ref. \<lbrakk> *x.field5 + *x.field6 \<rbrakk>\<close>

end

subsubsection\<open>Field Assignment Through Lenses\<close>

context
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