[PATCH] D48292: use modern type trait implementations when available

[Louis Dionne via Phabricator via cfe-commits]

ldionne added a comment.

I think this broke the C++03 bots: http://green.lab.llvm.org/green/view/Libcxx/job/libc++%20and%20libc++abi%20trunk/CI_ARCH=64,CI_EXCEPTIONS=ON,CI_STD=c++03/103/consoleFull


Repository:
  rCXX libc++

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D48292/new/

https://reviews.llvm.org/D48292