P2408 requires this for C++23, but implementing it in C++20 is safe
because the only code impacted would be code that violated a
precondition of the parallel algorithm. It was P2408 intent to
enable implementations to backport this to C++20.
Closes#63447 .
Reviewed By: philnik, #libc
Differential Revision: https://reviews.llvm.org/D154305
Those were found while trying to enable configurations like no-threads
and no-localization with Clang modules enabled.
Differential Revision: https://reviews.llvm.org/D153977
These concepts are used to ensure valid iterators are passed to PSTL algorithms, but can also be used for other interfaces.
Reviewed By: ldionne, #libc
Spies: EricWF, libcxx-commits
Differential Revision: https://reviews.llvm.org/D150493
