[PATCH] D141803: [Clang] Reject in-class defaulting of previously declared comparison operators

[Roy Jacobson via Phabricator via cfe-commits]

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Comparison operators are not allowed to be defaulted if they were previously declared outside the class.
Pretty low-impact, but it's nice to reject this without a linking error.
Fixes https://github.com/llvm/llvm-project/issues/51227.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D141803

Files:
  clang/docs/ReleaseNotes.rst
  clang/include/clang/Basic/DiagnosticSemaKinds.td
  clang/lib/Sema/SemaDeclCXX.cpp
  clang/test/CXX/class/class.compare/class.compare.default/p1.cpp
  clang/test/CXX/class/class.compare/class.compare.default/p2.cpp
  clang/test/CXX/class/class.compare/class.compare.default/p3.cpp

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