[all-commits] [llvm/llvm-project] ecc7e6: [Clang] Handle instantiating captures in addInstan...

[Younan Zhang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ecc7e6ce4cd57a614985e95daf7027918cb8723e
      https://github.com/llvm/llvm-project/commit/ecc7e6ce4cd57a614985e95daf7027918cb8723e
  Author: Younan Zhang <zyn7109 at gmail.com>
  Date:   2025-02-25 (Tue, 25 Feb 2025)

  Changed paths:
    M clang/lib/Sema/SemaConcept.cpp
    M clang/test/SemaTemplate/concepts-lambda.cpp

  Log Message:
  -----------
  [Clang] Handle instantiating captures in addInstantiatedCapturesToScope() (#128478)

addInstantiatedCapturesToScope() might be called when transforming a
lambda body. In this situation, it would look into all the lambda's
parents and figure out all the instantiated captures. However, the
instantiated captures are not visible from lambda's class decl until the
lambda is rebuilt (i.e. after the lambda body transform). So this patch
corrects that by also examining the LambdaScopeInfo, serving as a
workaround for not having deferred lambda body instantiation in Clang
20, to avoid regressing some real-world use cases.

Fixes #128175



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