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b96e2ff9d8
gcc/libstdc++-v3
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Michael de Lang b96e2ff9d8 libstdc++: Implement constexpr std::basic_string for C++20 
This is only supported for the cxx11 ABI, not for COW strings.

libstdc++-v3/ChangeLog:

	* include/bits/basic_string.h (basic_string, operator""s): Add
	constexpr for C++20.
	(basic_string::basic_string(basic_string&&)): Only copy
	initialized portion of the buffer.
	(basic_string::basic_string(basic_string&&, const Alloc&)):
	Likewise.
	* include/bits/basic_string.tcc (basic_string): Add constexpr
	for C++20.
	(basic_string::swap(basic_string&)): Only copy initialized
	portions of the buffers.
	(basic_string::_M_replace): Add constexpr implementation that
	doesn't depend on pointer comparisons.
	* include/bits/cow_string.h: Adjust comment.
	* include/ext/type_traits.h (__is_null_pointer): Add constexpr.
	* include/std/string (erase, erase_if): Add constexpr.
	* include/std/version (__cpp_lib_constexpr_string): Update
	value.
	* testsuite/21_strings/basic_string/cons/char/constexpr.cc:
	New test.
	* testsuite/21_strings/basic_string/cons/wchar_t/constexpr.cc:
	New test.
	* testsuite/21_strings/basic_string/literals/constexpr.cc:
	New test.
	* testsuite/21_strings/basic_string/modifiers/constexpr.cc: New test.
	* testsuite/21_strings/basic_string/modifiers/swap/char/constexpr.cc:
	New test.
	* testsuite/21_strings/basic_string/modifiers/swap/wchar_t/constexpr.cc:
	New test.
	* testsuite/21_strings/basic_string/version.cc: New test.
2021-11-16 16:43:20 +00:00
..
config libstdc++: Print assertion messages to stderr [PR59675] 2021-11-12 12:23:10 +00:00
doc libstdc++: Deprecate std::unexpected and handler functions 2021-11-04 20:53:29 +00:00
include libstdc++: Implement constexpr std::basic_string for C++20 2021-11-16 16:43:20 +00:00
libsupc++ libstdc++: Deprecate std::unexpected and handler functions 2021-11-04 20:53:29 +00:00
po Update copyright years. 2021-01-04 10:26:59 +01:00
python libstdc++: Fix pretty printing of std::unique_ptr [PR103086] 2021-11-04 22:50:02 +00:00
scripts libstdc++: Improve generated man pages for libstdc++ 2021-10-21 22:24:57 +01:00
src c++: check constexpr constructor body 2021-11-15 02:50:45 -05:00
testsuite libstdc++: Implement constexpr std::basic_string for C++20 2021-11-16 16:43:20 +00:00
acinclude.m4 libstdc++: Use GCC_TRY_COMPILE_OR_LINK for getentropy, arc4random 2021-11-13 01:45:06 +01:00
aclocal.m4
ChangeLog Daily bump. 2021-11-16 00:16:31 +00:00
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ChangeLog-2020 libstdc++: Fix typo in ChangeLog-2020 2021-01-13 11:02:13 +00:00
config.h.in libstdc++: Support getentropy and arc4random in std::random_device 2021-11-09 14:40:33 +00:00
configure libstdc++: Use GCC_TRY_COMPILE_OR_LINK for getentropy, arc4random 2021-11-13 01:45:06 +01:00
configure.ac libstdc++: Support getentropy and arc4random in std::random_device 2021-11-09 14:40:33 +00:00
configure.host Scope libstdc++ configuration for vxworks to all versions 2020-10-22 16:40:57 +00:00
crossconfig.m4 libstdc++: Check for TLS support on mingw cross-compilers 2021-09-15 09:49:33 +01:00
fragment.am libstdc++: Add C++ runtime support for new 128-bit long double format 2020-12-16 23:25:01 +00:00
linkage.m4
Makefile.am Update copyright years. 2021-01-04 10:26:59 +01:00
Makefile.in libstdc++: Add C++ runtime support for new 128-bit long double format 2020-12-16 23:25:01 +00:00
README

README 

file: libstdc++-v3/README

New users may wish to point their web browsers to the file
index.html in the 'doc/html' subdirectory.  It contains brief
building instructions and notes on how to configure the library in
interesting ways.