[PATCH] [Concepts] lex keywords: concept and requires

[Michael Wong]

This looks fine to me. Just one question: since we are setting -std=c++14,
is there no define for -DCXX14 instead of having to set -DCXX11? If this is
clang policy, then LGTM, otherwise, why are we not adding a define for
C++14?


http://reviews.llvm.org/D10233

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