tree 964b5c6a2c2c529a715b6c5c52cf4fc539ab3661
parent 00f026a08cd20c25ab9e465c9eda5f234f0a008d
author Louis Dionne <ldionne@apple.com> 1569596812 +0000
committer Louis Dionne <ldionne@apple.com> 1569596812 +0000

[libc++] Take 2: Implement LWG 3158

Summary:
LWG 3158 marks the allocator_arg_t constructor of std::tuple as
conditionnally explicit based on whether the default constructors
of the tuple's members are explicitly default constructible.

This was previously committed as r372778 and reverted in r372832 due to
the commit breaking LLVM's build in C++14 mode. This issue has now been
addressed.

Reviewers: mclow.lists

Subscribers: christof, jkorous, dexonsmith, libcxx-commits

Tags: #libc

Differential Revision: https://reviews.llvm.org/D65232

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@373092 91177308-0d34-0410-b5e6-96231b3b80d8