Richard Smith 5e29dd3fe0 P0426: Make the library implementation of constexpr char_traits a little easier ...

by providing a memchr builtin that returns char* instead of void*.

Also add a __has_feature flag to indicate the presence of constexpr forms of
the relevant <string> functions.

llvm-svn: 292555

2017-01-20 00:45:35 +00:00

968 B

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