[PATCH] D53486: [libcxx] Only define __libcpp_is_floating_point<_Float16> for Clang

[Louis Dionne via Phabricator]

ldionne added a comment.

Why does Clang define it for C++?

The problem I have with this is that it means `is_floating_point<_Float16>` is true on Clang but false on GCC (in case GCC starts defining `_Float16` for C++).


Repository:
  rCXX libc++

https://reviews.llvm.org/D53486