[all-commits] [llvm/llvm-project] 7b159b: [Clang] Defaults `-Wunicode-whitespace` to an erro...

[Corentin Jabot via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7b159b648bc3684da152a3f14b5ee53456736fe9
      https://github.com/llvm/llvm-project/commit/7b159b648bc3684da152a3f14b5ee53456736fe9
  Author: Corentin Jabot <corentinjabot at gmail.com>
  Date:   2026-07-21 (Tue, 21 Jul 2026)

  Changed paths:
    M clang/docs/ReleaseNotes.md
    M clang/include/clang/Basic/DiagnosticLexKinds.td
    M clang/lib/Lex/Lexer.cpp
    M clang/test/Analysis/mig.mm
    M clang/test/Lexer/unicode.c

  Log Message:
  -----------
  [Clang] Defaults `-Wunicode-whitespace` to an error. (#210945)

Clang accepts some Unicode whitespaces in some context. There are a few
issues with this:
 - The support is incomplete and inconsistent, as illustrated in #38934
- We are not consistent with the Unicode specs (tr1, tr55) in that we
treat U+0028/0+0029 as horizontal separators while Unicode consider them
vertical.

Ultimately, Unicode whitespaces are more likely than not unintended.
Neither GCC nor MSVC support this extension.

Fixes #38934.



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