[cfe-commits] [PATCH] Produce -Wc++0x-compat warnings if C++98 code uses C++11 keywords

[Richard Smith]

Hi,

The attached patch adds a -Wc++0x-compat warning if a C++11 keyword is used
when compiling in C++98 mode. The warning is provided only for the first usage
of each keyword. It has false negatives if the keyword comes from the body of
a macro, but covers the majority of cases. I'm not very familiar with the
lexer, so a review would be very much appreciated.

Thanks,
Richard
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