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Ville Voutilainen 250f5b6cc1 Implement LWG 2900, The copy and move constructors of optional are not constexpr. 
Implement LWG 2900, The copy and move constructors
of optional are not constexpr.
* include/std/optional (_Optional_payload): New.
(_Optional_base): Remove the bool parameter.
(_Optional_base<_Tp, false>): Remove.
(_Optional_base()): Adjust.
(_Optional_base(nullopt_t)): Likewise.
(_Optional_base(in_place_t, _Args&&...)): Likewise.
(_Optional_base(in_place_t, initializer_list<_Up>, _Args&&...)):
Likewise.
(_Optional_base(const _Optional_base&)): Likewise.
(_Optional_base(_Optional_base&&)): Likewise.
(operator=(const _Optional_base&)): Likewise.
(operator=(_Optional_base&&)): Likewise.
(~_Optional_base()): Remove.
(_M_is_engaged()): Adjust.
(_M_get()): Likewise.
(_M_construct(_Args&&...)): Likewise.
(_M_destruct()): Likewise.
(_M_reset()): Likewise.
(_Optional_base::_Empty_byte): Remove.
(_Optional_base::_M_empty): Remove.
(_Optional_base::_M_payload): Adjust.
* testsuite/20_util/optional/cons/value_neg.cc: Adjust.
* testsuite/20_util/optional/constexpr/cons/value.cc: Add tests.

From-SVN: r246556
 		2017-03-29 02:05:21 +03:00
..
backward Update copyright years. 2017-01-01 13:07:43 +01:00
bits PR libstdc++/80137 use std::nextafter instead of looping 2017-03-28 17:09:49 +01:00
c Update copyright years. 2017-01-01 13:07:43 +01:00
c_compatibility Update copyright years. 2017-01-01 13:07:43 +01:00
c_global Define std::byte for C++17 (P0298R3) 2017-03-09 15:42:02 +00:00
c_std Update copyright years. 2017-01-01 13:07:43 +01:00
debug Add deduction guides for C++17 (P0433R2, partial) 2017-03-22 15:58:35 +00:00
decimal Update copyright years. 2017-01-01 13:07:43 +01:00
experimental Ensure <experimental/iterator> includes <iterator> 2017-02-23 18:25:22 +00:00
ext PR libstdc++/62045 fix O(N) insertion in pd_ds binary heap 2017-03-15 20:11:48 +00:00
parallel Update copyright years. 2017-01-01 13:07:43 +01:00
precompiled Update copyright years. 2017-01-01 13:07:43 +01:00
profile Remove unused include from Profile Mode header 2017-01-13 17:20:23 +00:00
std Implement LWG 2900, The copy and move constructors of optional are not constexpr. 2017-03-29 02:05:21 +03:00
tr1 PR libstdc++/70607 revert recent changes to <tr1/complex> 2017-01-26 19:40:02 +00:00
tr2 Update copyright years. 2017-01-01 13:07:43 +01:00
Makefile.am PR78905 define _GLIBCXX_RELEASE macro 2017-01-19 16:40:46 +00:00
Makefile.in PR78905 define _GLIBCXX_RELEASE macro 2017-01-19 16:40:46 +00:00