[all-commits] [llvm/llvm-project] 0bc02b: [Clang] Instantiate Typedefs referenced by type al...

[Younan Zhang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0bc02b999a9686ba240b7a68d3f1cbbf037d2170
      https://github.com/llvm/llvm-project/commit/0bc02b999a9686ba240b7a68d3f1cbbf037d2170
  Author: Younan Zhang <zyn7109 at gmail.com>
  Date:   2024-10-11 (Fri, 11 Oct 2024)

  Changed paths:
    M clang/lib/Sema/SemaTemplateDeductionGuide.cpp
    M clang/test/SemaCXX/cxx20-ctad-type-alias.cpp

  Log Message:
  -----------
  [Clang] Instantiate Typedefs referenced by type alias deduction guides (#111804)

TypedefNameDecl referenced by a synthesized CTAD guide for type aliases
was not transformed previously, resulting in a substitution failure in
BuildDeductionGuideForTypeAlias() when substituting into the
right-hand-side deduction guide.

This patch fixes it in the way we have been doing since
https://reviews.llvm.org/D80743. We transform all the function
parameters, parenting referenced TypedefNameDecls with the
CXXDeductionGuideDecl. Then we instantiate these declarations in
FindInstantiatedDecl() as we build up the eventual deduction guide,
using the mechanism introduced in D80743

Fixes #111508



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