[all-commits] [llvm/llvm-project] 5ce5e9: [Clang] Add warnings for CWG2521

[Po-yao Chang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5ce5e983f82c802e44faa8ed42d605d70c045ba9
      https://github.com/llvm/llvm-project/commit/5ce5e983f82c802e44faa8ed42d605d70c045ba9
  Author: Po-yao Chang <poyaoc97 at gmail.com>
  Date:   2023-07-19 (Wed, 19 Jul 2023)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/include/clang/Basic/DiagnosticGroups.td
    M clang/include/clang/Basic/DiagnosticSemaKinds.td
    M clang/include/clang/Basic/IdentifierTable.h
    M clang/lib/Basic/IdentifierTable.cpp
    M clang/lib/Sema/SemaDeclCXX.cpp
    M clang/lib/Sema/SemaExprCXX.cpp
    M clang/test/CXX/drs/dr25xx.cpp
    M clang/www/cxx_dr_status.html

  Log Message:
  -----------
  [Clang] Add warnings for CWG2521

1. Teach -Wuser-defined-literals to warn on using double underscores in
   literal suffix identifiers.
2. Add -Wdeprecated-literal-operator to warn about the use of the first
   grammar production of literal-operator-id, which defaults to off for now.

Differential Revision: https://reviews.llvm.org/D152632