[cfe-commits] [patch] Allow redefining c++ operators like "and" in ms mode

[Nico Weber]

Hi,

the attached patch allows things like `#define and foo` in ms mode.
This fixes PR10606.

I'm not sure if this is the right approach: Preprocessor.cpp sets does
setIdentifierInfo(0) for isCPlusPlusOperatorKeyword()s, and my patch
sets it back to a "real" identifier info just in time before it's
needed in ReadMacroName().

Nico
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