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4 Commits

Author SHA1 Message Date
Joe Loser d2baefae68
[libc++] Replace _LIBCPP_HAS_NO_CONCEPTS with _LIBCPP_STD_VER > 17. NFCI. 
All supported compilers that support C++20 now support concepts. So, remove
`_LIB_LIBCPP_HAS_NO_CONCEPTS` in favor of `_LIBCPP_STD_VER > 17`. Similarly in
the tests, remove `// UNSUPPORTED: libcpp-no-concepts`.

Differential Revision: https://reviews.llvm.org/D121528
 2022-03-13 12:32:06 -04:00
Casey Carter 009791e0db [libcxx][test] optional's comparisons with optional are not portably constrained 
so use them as concept test cases only with libc++.

Differential Revision: https://reviews.llvm.org/D116884
 2022-02-09 14:00:24 -08:00
zoecarver 879cbac08b [libc++][ranges] Add range.cmp: equal_to, not_equal_to, less, etc. 
Adds the six new concept constrained comparisons.

Differential Revision: https://reviews.llvm.org/D100429
 2021-04-22 17:33:04 -07:00
Christopher Di Bella 7959d59028 [libcxx] adds concepts `std::totally_ordered` and `std::totally_ordered_with` 
Implements parts of:
    - P0898R3 Standard Library Concepts
    - P1754 Rename concepts to standard_case for C++20, while we still can

Reviewed By: Mordante

Differential Revision: https://reviews.llvm.org/D98983
 2021-04-02 06:00:21 +00:00