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Ville Voutilainen 4fea820523 re PR libstdc++/87855 (std::optional<T> only copy-constructible if T is trivially copy-constructible) 
PR libstdc++/87855

Also implement P0602R4 (variant and optional
should propagate copy/move triviality) for std::optional.
* include/std/optional (_Optional_payload): Change
the main constraints to check constructibility in
addition to assignability.
(operator=): Make constexpr.
(_M_reset): Likewise.
(_M_construct): Likewise.
(operator->): Likewise.
* testsuite/20_util/optional/assignment/8.cc: Adjust.
* testsuite/20_util/optional/assignment/9.cc: New.

From-SVN: r266278
 		2018-11-19 17:05:18 +02:00
..
backward P0935R0 Eradicating unnecessarily explicit default constructors 2018-06-14 15:12:24 +01:00
bits re PR libstdc++/54005 (Use __atomic_always_lock_free in libstdc++ is_lock_free instead of __atomic_is_lock_free) 2018-11-11 22:20:19 +00:00
c Update copyright years. 2018-01-03 11:03:58 +01:00
c_compatibility Update copyright years. 2018-01-03 11:03:58 +01:00
c_global cstddef: Add versioned namespace. 2018-10-24 05:20:35 +00:00
c_std Update copyright years. 2018-01-03 11:03:58 +01:00
debug re PR libstdc++/87872 (debug list::splice should not call _M_transfer_from_if on self-splices) 2018-11-06 20:20:06 +00:00
decimal Update copyright years. 2018-01-03 11:03:58 +01:00
experimental Fix versioned namespace macros for Networking TS 2018-10-16 17:12:51 +01:00
ext Relocation (= move+destroy) 2018-10-25 13:03:13 +00:00
parallel Update copyright years. 2018-01-03 11:03:58 +01:00
precompiled Add initial version of C++17 <memory_resource> header 2018-07-24 22:09:55 +01:00
profile Update copyright years. 2018-01-03 11:03:58 +01:00
std re PR libstdc++/87855 (std::optional<T> only copy-constructible if T is trivially copy-constructible) 2018-11-19 17:05:18 +02:00
tr1 PR libstdc++/83566 - cyl_bessel_j returns wrong result for x>1000 2018-11-18 18:32:26 +00:00
tr2 PR libstdc++/87784 fix dynamic_bitset::push_back 2018-10-30 14:49:32 +00:00
Makefile.am Initial commit of Networking TS implementation 2018-10-12 11:50:15 +01:00
Makefile.in Update GCC to autoconf 2.69, automake 1.15.1 (PR bootstrap/82856). 2018-10-31 17:03:16 +00:00