r276431 - in /trunk/libstdc++-v3: ChangeLog inc...

[redi@gcc.gnu.org]

Author: redi
Date: Tue Oct  1 21:02:22 2019
New Revision: 276431

URL: https://gcc.gnu.org/viewcvs?rev=276431&root=gcc&view=rev
Log:
Make some parallel mode algorithms usable in constexpr contexts

This makes the __parallel::equal and __parallel:lexicographical_compare
algorithms usable in constant expressions, by dispatching to the
sequential algorithm when calling during constant evaluation.

	* include/parallel/algobase.h (equal, lexicographical_compare): Add
	_GLIBCXX20_CONSTEXPR and dispatch to sequential algorithm when being
	constant evaluated.
	* include/parallel/algorithmfwd.h (equal, lexicographical_compare):
	Add _GLIBCXX20_CONSTEXPR.

Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/parallel/algobase.h
    trunk/libstdc++-v3/include/parallel/algorithmfwd.h