Fix the header being included when trying to specialize std::hash
authorChristopher Dykes <cdykes@fb.com>
Fri, 19 May 2017 23:42:25 +0000 (16:42 -0700)
committerFacebook Github Bot <facebook-github-bot@users.noreply.github.com>
Fri, 19 May 2017 23:44:31 +0000 (16:44 -0700)
commit5810472278e75f70a1c9e930280dc7111fa66a0c
tree1da0ba397bcf5e3f9cb5848dfeea18b9c6cbfd67
parentd84b1b628d8b723135a34de8dc79cbae3412d8fb
Fix the header being included when trying to specialize std::hash

Summary: `std::hash` lives in `<functional>`, not `<xstddef>`.

Reviewed By: yfeldblum

Differential Revision: D5097468

fbshipit-source-id: d0684491d1d4b0f83f07ad837a66a915ce2ec8a6
folly/portability/PThread.h