[all-commits] [llvm/llvm-project] bdeda9: Make wide multi-character character literals ill-f...

[Aaron Ballman via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: bdeda959abd74c88a6cfc34b10c1b665cb45cb8d
      https://github.com/llvm/llvm-project/commit/bdeda959abd74c88a6cfc34b10c1b665cb45cb8d
  Author: Corentin Jabot <corentin.jabot at gmail.com>
  Date:   2021-08-20 (Fri, 20 Aug 2021)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/include/clang/Basic/DiagnosticLexKinds.td
    M clang/lib/Lex/LiteralSupport.cpp
    M clang/test/CodeGen/char-literal.c
    M clang/test/CodeGen/string-literal-short-wstring.c
    M clang/test/Lexer/char-literal.cpp
    M clang/test/Lexer/wchar.c
    M clang/test/Misc/warning-flags.c
    M clang/test/Preprocessor/Weverything_pragma.c

  Log Message:
  -----------
  Make wide multi-character character literals ill-formed

This implements P2362, which has not yet been approved by the
C++ committee, but because wide-multi character literals are
implementation defined, clang might not have to wait for WG21.

This change is also being applied in C mode as the behavior is
implementation-defined in C as well and there's no benefit to
having different rules between the languages.

The other part of P2362, making non-representable character
literals ill-formed, is already implemented by clang