[all-commits] [llvm/llvm-project] 198ffb: [Clang][Sema] Implement approved resolution for CW...

[Krystian Stasiowski via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 198ffb85314f7741ed048de67d68ca83bb30e16e
      https://github.com/llvm/llvm-project/commit/198ffb85314f7741ed048de67d68ca83bb30e16e
  Author: Krystian Stasiowski <sdkrystian at gmail.com>
  Date:   2024-04-11 (Thu, 11 Apr 2024)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/include/clang/Basic/DiagnosticSemaKinds.td
    M clang/lib/Sema/SemaDecl.cpp
    M clang/test/CXX/dcl.decl/dcl.meaning/p1-0x.cpp
    M clang/test/CXX/drs/dr28xx.cpp
    M clang/test/Parser/cxx-class.cpp

  Log Message:
  -----------
  [Clang][Sema] Implement approved resolution for CWG2858 (#88042)

The approved resolution for CWG2858 changes
[expr.prim.id.qual] p2 sentence 2 to read:
> A declarative _nested-name-specifier_ shall not have a
_computed-type-specifier_.

This patch implements the approved resolution. Since we don't consider
_nested-name-specifiers_ in friend declarations to be declarative (yet),
it currently isn't possible to write a test that would produce this
diagnostic (`diagnoseQualifiedDeclaration` is never called if the
`DeclContext` can't be computed). Nevertheless, tests were added which
will produce the diagnostic once we start calling
`diagnoseQualifiedDeclaration` for friend declarations.



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