https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91073
--- Comment #13 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jonathan Wakely <[email protected]>: https://gcc.gnu.org/g:f214ffb336d582a66149068a2a96b7fcf395b5de commit r10-6325-gf214ffb336d582a66149068a2a96b7fcf395b5de Author: Jonathan Wakely <[email protected]> Date: Wed Jan 29 13:56:49 2020 +0000 libstdc++: Simplify constraints on std::compare_three_way The __3way_builtin_ptr_cmp concept can use three_way_comparable_with to check whether <=> is valid. Doing that makes it obvious that the disjunction on compare_three_way::operator() is redundant, because the second constraint subsumes the first. The workaround for PR c++/91073 can also be removed as that bug is fixed now. * libsupc++/compare (__detail::__3way_builtin_ptr_cmp): Use three_way_comparable_with. (__detail::__3way_cmp_with): Remove workaround for fixed bug. (compare_three_way::operator()): Remove redundant constraint from requires-clause. (__detail::_Synth3way::operator()): Use three_way_comparable_with instead of workaround. * testsuite/18_support/comparisons/object/93479.cc: Prune extra output due to simplified constraints on compare_three_way::operator().
