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gcc/libstdc++-v3
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Jonathan Wakely b7a89c041a libstdc++: Allow unique_ptr<Incomplete[]>::operator[] [PR 101236] 
PR libstdc++/101236 shows that LLVM depends on being able to use
unique_ptr<T[]>::operator[] when T is incomplete. This is undefined, but
previously worked with libstdc++. When I added the conditional noexcept
to that operator we started to diagnose the incomplete type.

This change restores support for that case, by making the noexcept
condition check that the type is complete before checking whether
indexing on the pointer can throw.  A workaround for PR c++/101239 is
needed to avoid a bogus error where G++ fails to do SFINAE on the
ill-formed p[n] expression and gets an ICE. Instead of checking that the
p[n] expression is valid in the trailing-return-type, we only check that
the element_type is complete.

libstdc++-v3/ChangeLog:

	PR libstdc++/101236
	* include/bits/unique_ptr.h (unique_ptr<T[], D>::operator[]):
	Fail gracefully if element_type is incomplete.
	* testsuite/20_util/unique_ptr/cons/incomplete.cc: Clarify that
	the standard doesn't require this test to work for array types.
	* testsuite/20_util/unique_ptr/lwg2762.cc: Check that incomplete
	types can be used with array specialization.
	* testsuite/20_util/unique_ptr/101236.cc: New test.
2021-06-28 14:20:55 +01:00
..
config ctype support for libstdc++ on VxWorks 2021-05-04 21:49:43 -03:00
doc libstdc++: Implement LWG 415 for std::ws 2021-06-28 13:34:49 +01:00
include libstdc++: Allow unique_ptr<Incomplete[]>::operator[] [PR 101236] 2021-06-28 14:20:55 +01:00
libsupc++ libstdc++: Implement LWG 3465 for std::compare_partial_order_fallback [PR101056] 2021-06-14 14:04:45 +01:00
po Update copyright years. 2021-01-04 10:26:59 +01:00
python libstdc++: Fix installation of python hooks [PR 99453] 2021-06-01 13:29:34 +01:00
scripts libstdc++: Allow lualatex to be used for Doxygen PDF 2021-05-17 12:13:41 +01:00
src libstdc++: [_GLIBCXX_DEBUG] Enhance rendering of assert message 2021-05-26 21:50:17 +02:00
testsuite libstdc++: Allow unique_ptr<Incomplete[]>::operator[] [PR 101236] 2021-06-28 14:20:55 +01:00
acinclude.m4 ctype support for libstdc++ on VxWorks 2021-05-04 21:49:43 -03:00
aclocal.m4 Add `--with-toolexeclibdir=' configuration option 2020-01-24 11:24:25 +00:00
ChangeLog Daily bump. 2021-06-26 00:16:39 +00:00
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ChangeLog-2019 libstdc++: Fix whitespace in ChangeLog-2019 2020-01-09 21:31:35 +00:00
ChangeLog-2020 libstdc++: Fix typo in ChangeLog-2020 2021-01-13 11:02:13 +00:00
config.h.in libstdc++: Remove _GLIBCXX_USE_INT128 autoconf macro 2021-05-04 12:07:09 +01:00
configure ctype support for libstdc++ on VxWorks 2021-05-04 21:49:43 -03:00
configure.ac libstdc++: Remove _GLIBCXX_USE_INT128 autoconf macro 2021-05-04 12:07:09 +01:00
configure.host Scope libstdc++ configuration for vxworks to all versions 2020-10-22 16:40:57 +00:00
crossconfig.m4 Scope libstdc++ configuration for vxworks to all versions 2020-10-22 16:40:57 +00:00
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.