[all-commits] [llvm/llvm-project] 55cdb3: [C++20] [Modules] Merge lambdas in source to impor...

[Chuanqi Xu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 55cdb3c785ad688054493bb82c0cf3b9d7ccea07
      https://github.com/llvm/llvm-project/commit/55cdb3c785ad688054493bb82c0cf3b9d7ccea07
  Author: Chuanqi Xu <yedeng.yd at linux.alibaba.com>
  Date:   2024-08-29 (Thu, 29 Aug 2024)

  Changed paths:
    M clang/include/clang/AST/Decl.h
    M clang/include/clang/AST/Type.h
    M clang/include/clang/Sema/ExternalSemaSource.h
    M clang/include/clang/Sema/MultiplexExternalSemaSource.h
    M clang/include/clang/Serialization/ASTReader.h
    M clang/lib/Sema/MultiplexExternalSemaSource.cpp
    M clang/lib/Serialization/ASTReader.cpp
    A clang/test/Modules/pr102721.cppm

  Log Message:
  -----------
  [C++20] [Modules] Merge lambdas in source to imported lambdas (#106483)

Close https://github.com/llvm/llvm-project/issues/102721

Generally, the type of merged decls will be reused in ASTContext. But
for lambda, in the import and then include case, we can't decide its
previous decl in the imported modules so that we can't assign the
previous decl before creating the type for it. Since we can't decide its
numbering before creating it. So we have to assign the previous decl and
the canonical type for it after creating it, which is unusual and
slightly hack.



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