r245024 - in /trunk/libstdc++-v3: ChangeLog inc...

[ville@gcc.gnu.org]

Author: ville
Date: Mon Jan 30 13:37:16 2017
New Revision: 245024

URL: https://gcc.gnu.org/viewcvs?rev=245024&root=gcc&view=rev
Log:
Implement LWG 2825, LWG 2756 breaks class template argument deduction for optional.
* include/std/optional: Add a deduction guide.
* testsuite/20_util/optional/cons/deduction_guide.cc: New.

Added:
    trunk/libstdc++-v3/testsuite/20_util/optional/cons/deduction_guide.cc
Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/std/optional