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gcc/libstdc++-v3/include
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Jonathan Wakely 4fa6c0ec35 libstdc++: Define std::is_pointer_interconvertible_base_of for C++20 
Implement these traits using the new built-ins that Jakub added
recently.

Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

libstdc++-v3/ChangeLog:

	* include/std/type_traits (__cpp_lib_is_pointer_interconvertible)
	(is_pointer_interconvertible_base_of_v)
	(is_pointer_interconvertible_base_of): Define for C++20.
	* include/std/version (__cpp_lib_is_pointer_interconvertible):
	Define.
	* testsuite/23_containers/span/layout_compat.cc: Use correct
	feature test macro for std::is_layout_compatible_v.
	* testsuite/20_util/is_pointer_interconvertible/value.cc: New test.
	* testsuite/20_util/is_pointer_interconvertible/version.cc: New test.
2021-08-11 16:53:22 +01:00
..
backward Update copyright years. 2021-01-04 10:26:59 +01:00
bits libstdc++: Reduce use of debug containers in <regex> 2021-08-09 20:46:56 +01:00
c Update copyright years. 2021-01-04 10:26:59 +01:00
c_compatibility Update copyright years. 2021-01-04 10:26:59 +01:00
c_global libstdc++: Add nodiscard attribute to cast-like functions 2021-04-06 16:43:25 +01:00
c_std Update copyright years. 2021-01-04 10:26:59 +01:00
debug libstdc++: [_GLIBCXX_DEBUG] Avoid allocator operator== when always equal 2021-08-09 20:44:58 +02:00
decimal libstdc++: Fix doxygen markup for group close commands 2021-04-06 16:43:24 +01:00
experimental libstdc++: Simplify std::optional::value() 2021-07-27 21:36:01 +01:00
ext libstdc++: Use __builtin_operator_new when available [PR94295] 2021-07-22 14:38:34 +01:00
parallel Update copyright years. 2021-01-04 10:26:59 +01:00
precompiled libstdc++: Add support for C++20 barriers 2021-01-07 12:52:37 -08:00
pstl libstdc++: Fix up parallel_backend_serial.h [PR97549] 2021-02-23 09:28:14 +01:00
std libstdc++: Define std::is_pointer_interconvertible_base_of for C++20 2021-08-11 16:53:22 +01:00
tr1 libstdc++: Fix even more doxygen markup for group close commands 2021-04-09 13:09:23 +01:00
tr2 libstdc++: Fix doxygen markup for group close commands 2021-04-06 16:43:24 +01:00
Makefile.am libstdc++: Move COW string definitions to separate header 2021-07-27 12:04:18 +01:00
Makefile.in libstdc++: Move COW string definitions to separate header 2021-07-27 12:04:18 +01:00