WG21-P1222R4 <flat_set>
WG21-P3567R2 flat_meow Fixes
LWG-3751 Missing feature macro for flat_set
LWG-3774 <flat_set> should include <compare>
LWG-3786 Flat maps' deduction guides need to default Allocator to be useful
LWG-3803 flat_meow constructors taking KeyContainer lack KeyCompare parameter
LWG-3879 erase_if for flat_{,multi}set is incorrectly specified
LWG-3884 flat_meow is missing allocator-extended copy/move constructors
LWG-3987 Including <flat_meow> doesn't provide std::begin/end
LWG-4384 flat_set::erase(iterator) is underconstrained
Feature-test macro:
#define __cpp_lib_flat_set 202511L
Internal VS-PR-420058 has taught the IDE about this new extensionless header - thanks @CaseyCarter!
WG21-P3567R2 "flat_meow Fixes" was voted into C++26 at the November 2025 meeting; while it wasn't officially a C++23 DR, we should obviously implement it as part of the initial release.
WG21-P1222R4
<flat_set>WG21-P3567R2
flat_meowFixesLWG-3751 Missing feature macro for
flat_setLWG-3774
<flat_set>should include<compare>LWG-3786 Flat maps' deduction guides need to default
Allocatorto be usefulLWG-3803
flat_meowconstructors takingKeyContainerlackKeyCompareparameterLWG-3879
erase_ifforflat_{,multi}setis incorrectly specifiedLWG-3884
flat_meowis missing allocator-extended copy/move constructorsLWG-3987 Including
<flat_meow>doesn't providestd::begin/endLWG-4384
flat_set::erase(iterator)is underconstrainedFeature-test macro:
Internal VS-PR-420058 has taught the IDE about this new extensionless header - thanks @CaseyCarter!
WG21-P3567R2 "
flat_meowFixes" was voted into C++26 at the November 2025 meeting; while it wasn't officially a C++23 DR, we should obviously implement it as part of the initial release.