r278996 - in /trunk/libstdc++-v3: ChangeLog inc...

[redi@gcc.gnu.org]

Author: redi
Date: Thu Dec  5 12:46:50 2019
New Revision: 278996

URL: https://gcc.gnu.org/viewcvs?rev=278996&root=gcc&view=rev
Log:
libstdc++: Define std::lexicographical_compare_three_way for C++20

	* include/bits/stl_algobase.h (lexicographical_compare_three_way):
	Define for C++20.
	* testsuite/25_algorithms/lexicographical_compare_three_way/1.cc: New
	test.
	* testsuite/25_algorithms/lexicographical_compare_three_way/
	constexpr.cc: New test.

Added:
    trunk/libstdc++-v3/testsuite/25_algorithms/lexicographical_compare_three_way/
    trunk/libstdc++-v3/testsuite/25_algorithms/lexicographical_compare_three_way/1.cc
    trunk/libstdc++-v3/testsuite/25_algorithms/lexicographical_compare_three_way/constexpr.cc
Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/bits/stl_algobase.h