https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87855
--- Comment #17 from ville at gcc dot gnu.org --- Author: ville Date: Mon Nov 19 15:05:18 2018 New Revision: 266278 URL: https://gcc.gnu.org/viewcvs?rev=266278&root=gcc&view=rev Log: 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. Added: trunk/libstdc++-v3/testsuite/20_util/optional/assignment/9.cc Modified: trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/include/std/optional trunk/libstdc++-v3/testsuite/20_util/optional/assignment/8.cc
