[all-commits] [llvm/llvm-project] 5e77df: [clang] CTAD: build aggregate deduction guides for...

[Haojian Wu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5e77dfecd2e274117cc0a75de69c832d00130e6a
      https://github.com/llvm/llvm-project/commit/5e77dfecd2e274117cc0a75de69c832d00130e6a
  Author: Haojian Wu <hokein.wu at gmail.com>
  Date:   2024-04-05 (Fri, 05 Apr 2024)

  Changed paths:
    M clang/include/clang/Sema/Sema.h
    M clang/lib/Sema/SemaInit.cpp
    M clang/lib/Sema/SemaTemplate.cpp
    M clang/test/SemaTemplate/deduction-guide.cpp

  Log Message:
  -----------
  [clang] CTAD: build aggregate deduction guides for alias templates. (#85904)

Fixes https://github.com/llvm/llvm-project/issues/85767.

The aggregate deduction guides are handled in a separate code path. We
don't generate dedicated aggregate deduction guides for alias templates
(we just reuse the ones from the underlying template decl by accident).
The patch fixes this incorrect issue.

Note: there is a small refactoring change in this PR, where we move the
cache logic from `Sema::DeduceTemplateSpecializationFromInitializer` to
`Sema::DeclareImplicitDeductionGuideFromInitList`



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