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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
Mark de Wever 3ba96cb2c9 [libc++] Adds tests for LWG-3373. 
The code in libc++ already satisfy the requirements of LWG-3373. Since
the issue was written to specifically allow the types to be used in
structured bindings, tests have been added to validate the new
requirement.

Implements
LWG-3373 {to,from}_chars_result and format_to_n_result need the "we really mean what we say" wording

Reviewed By: #libc, ldionne

Differential Revision: https://reviews.llvm.org/D117337
 2022-01-15 13:46:53 +01:00
Mark de Wever 3624c4d845 [libc++] Adds (to|from)_chars_result operator==. 
Implements part of P1614 The Mothership has Landed.

Reviewed By: #libc, Quuxplusone, Mordante

Differential Revision: https://reviews.llvm.org/D112366
 2021-11-19 16:29:33 +01:00
Mark de Wever ac08e2bb98 [libc++] Make chars_format a bitmask type. 
Some of Microsoft's unit tests in D70631 fail because libc++'s
implementation of std::chars_format isn't a proper bitmask type. Adding
the required functions to make std::chars_format a proper bitmask type.

Implements parts of P0067: Elementary string conversions

Differential Revision: https://reviews.llvm.org/D97115
 2021-04-14 18:17:38 +02:00