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Author SHA1 Message Date
Jordan Rose cc538345be Lexer: Don't warn about Unicode in preprocessor directives. 
This allows people to use Unicode in their #pragma mark and in macros
that exist only to be string-ized.

<rdar://problem/13107323&13121362>

llvm-svn: 174081
 2013-01-31 19:48:48 +00:00
Jordan Rose 17441589c3 Don't warn about Unicode characters in -E mode. 
People use the C preprocessor for things other than C files. Some of them
have Unicode characters. We shouldn't warn about Unicode characters
appearing outside of identifiers in this case.

There's not currently a way for the preprocessor to tell if it's in -E mode,
so I added a new flag, derived from the PreprocessorOutputOptions. This is
only used by the Unicode warnings for now, but could conceivably be used by
other warnings or even behavioral differences later.

<rdar://problem/13107323>

llvm-svn: 173881
 2013-01-30 01:52:57 +00:00
Jordan Rose 4246ae0089 As an extension, treat Unicode whitespace characters as whitespace. 
llvm-svn: 173370
 2013-01-24 20:50:50 +00:00