[cfe-commits] [PATCH] Validate C99 and C++03's set of UCNs

[Jordan Rose]

  - Protect validation set with a mutex. (Validation still only happens in debug builds.)

  - Warn about UCNs referring to surrogate characters under -Wunicode only, rather than try to come up with complicated logic for whether -Wunicode or -Wc++11-compat has a higher warning level. (We could do it, but it's probably not worth it.)

Hi rsmith,

http://llvm-reviews.chandlerc.com/D327

CHANGE SINCE LAST DIFF
  http://llvm-reviews.chandlerc.com/D327?vs=770&id=794#toc

Files:
  include/clang/Basic/DiagnosticGroups.td
  include/clang/Basic/DiagnosticLexKinds.td
  lib/Lex/Lexer.cpp
  lib/Lex/UnicodeCharSets.h
  test/Preprocessor/ucn-allowed-chars.c
  test/Preprocessor/utf8-allowed-chars.c
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