[all-commits] [llvm/llvm-project] f607e3: [Clang][Sema] Reject declaring an alias template w...

[Valentyn Yukhymenko via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f607e3fd23ef0019b2f3b289b4d46012400b8db5
      https://github.com/llvm/llvm-project/commit/f607e3fd23ef0019b2f3b289b4d46012400b8db5
  Author: Valentyn Yukhymenko <valentin.yukhymenko at gmail.com>
  Date:   2025-01-25 (Sat, 25 Jan 2025)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/lib/Sema/SemaDeclCXX.cpp
    M clang/test/CXX/temp/temp.decls/temp.variadic/fixed-expansion.cpp
    M clang/test/SemaCXX/alias-template.cpp

  Log Message:
  -----------
  [Clang][Sema] Reject declaring an alias template with the same name as its template parameter. (#123533)

The issue occurred because the template parameter scope was skipped
too early, before diagnosing the alias name shadowing.

To fix this, the patch moves it to after LookupName, such that the behavior
remains consistent with the typedef implementation.

Fixes llvm#123423



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