r256261 - in /branches/gcc-7-branch/libstdc++-v...

[ville@gcc.gnu.org]

Author: ville
Date: Thu Jan  4 18:58:29 2018
New Revision: 256261

URL: https://gcc.gnu.org/viewcvs?rev=256261&root=gcc&view=rev
Log:
Protect optional's deduction guide with the feature macro

Backport from mainline
2018-01-03  Ville Voutilainen  <ville.voutilainen@gmail.com>

Protect optional's deduction guide with the feature macro
* include/std/optional: Use the feature macro.

Modified:
    branches/gcc-7-branch/libstdc++-v3/ChangeLog
    branches/gcc-7-branch/libstdc++-v3/include/std/optional