r242415 - in /trunk/libstdc++-v3: ChangeLog doc...

Tue Nov 15 14:33:00 GMT 2016

Author: redi
Date: Tue Nov 15 14:33:09 2016
New Revision: 242415

URL: https://gcc.gnu.org/viewcvs?rev=242415&root=gcc&view=rev
Log:
Constrain swap overload for std::optional (LWG 2748)

	* doc/xml/manual/intro.xml: Document LWG 2748 status.
	* include/std/optional (optional<T>::swap): Use is_nothrow_swappable_v
	for exception specification.
	(swap(optional<T>&, optional<T>&)): Disable when T is not swappable.
	* testsuite/20_util/optional/swap/2.cc: New test.

Added:
    trunk/libstdc++-v3/testsuite/20_util/optional/swap/2.cc
Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/doc/xml/manual/intro.xml
    trunk/libstdc++-v3/include/std/optional