Backport std::index_sequence and friends
authorChristopher Dykes <cdykes@fb.com>
Wed, 15 Mar 2017 18:37:07 +0000 (11:37 -0700)
committerFacebook Github Bot <facebook-github-bot@users.noreply.github.com>
Wed, 15 Mar 2017 18:49:49 +0000 (11:49 -0700)
commit2843ff12364e1159d99f2b96bcc4a5c428dad1fa
treef207222cd94f8952d4b0fb68674771f1c13461ae
parent58d67ca5d73517414666cdf65e5e788f07e5a233
Backport std::index_sequence and friends

Summary:
To GCC 4.8, because it's not *quite* dead yet.

This is needed to get FixedString working properly on GCC 4.8

Reviewed By: yfeldblum

Differential Revision: D4646026

fbshipit-source-id: 075df04e479bd2b11f6538da2ed3e78b59956621
folly/ApplyTuple.h
folly/FixedString.h
folly/Utility.h
folly/test/UtilityTest.cpp