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Jonathan Wakely e182158261 PR libstdc++/86751 default assignment operators for std::pair 
The solution for PR 77537 causes ambiguities due to the extra copy
assignment operator taking a __nonesuch_no_braces parameter. By making
the base class non-assignable we don't need the extra deleted overload
in std::pair. The copy assignment operator will be implicitly deleted
(and the move assignment operator not declared) as needed. Without the
additional user-provided operator in std::pair the ambiguity is avoided.

	PR libstdc++/86751
	* include/bits/stl_pair.h (__pair_base): New class with deleted copy
	assignment operator.
	(pair): Derive from __pair_base.
	(pair::operator=): Remove deleted overload.
	* python/libstdcxx/v6/printers.py (StdPairPrinter): New pretty printer
	so that new base class isn't shown in GDB.
	* testsuite/20_util/pair/86751.cc: New test.
	* testsuite/20_util/pair/ref_assign.cc: New test.

From-SVN: r263185
 		2018-07-31 23:31:20 +01:00
..
config Add initial version of C++17 <memory_resource> header 2018-07-24 22:09:55 +01:00
doc Improve libstdc++ docs w.r.t newer C++ standards 2018-07-31 16:02:32 +01:00
include PR libstdc++/86751 default assignment operators for std::pair 2018-07-31 23:31:20 +01:00
libsupc++ Don't unconditionally define feature test macros in <version> 2018-07-31 23:31:14 +01:00
po PR libstdc++/86450 use -Wabi=2 and simplify -Werror use 2018-07-17 14:18:47 +01:00
python PR libstdc++/86751 default assignment operators for std::pair 2018-07-31 23:31:20 +01:00
scripts * scripts/create_testsuite_files: Fix typo in comment. 2018-07-16 18:42:20 +01:00
src * src/c++98/locale_init.cc: Fix #ifdef condition. 2018-07-26 16:36:50 +00:00
testsuite PR libstdc++/86751 default assignment operators for std::pair 2018-07-31 23:31:20 +01:00
ChangeLog PR libstdc++/86751 default assignment operators for std::pair 2018-07-31 23:31:20 +01:00
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ChangeLog-2016 Update copyright years. 2017-01-01 13:07:43 +01:00
ChangeLog-2017 Update copyright years. 2018-01-03 11:03:58 +01:00
Makefile.am Update copyright years. 2018-01-03 11:03:58 +01:00
Makefile.in PR libstdc++/86450 use -Wabi=2 and simplify -Werror use 2018-07-17 14:18:47 +01:00
README
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acinclude.m4 Add new src/c++17 directory to list in acinclude.m4 2018-07-25 12:01:39 +01:00
aclocal.m4 Build libgo with -Wa,-nH if possible (PR go/78978) [non-libgo parts] 2017-01-06 14:33:47 +00:00
config.h.in Fix bootstrap failure for bare metal due to autoconf link tests 2018-06-18 17:01:24 +01:00
configure Add initial version of C++17 <memory_resource> header 2018-07-24 22:09:55 +01:00
configure.ac PR libstdc++/86450 use -Wabi=2 and simplify -Werror use 2018-07-17 14:18:47 +01:00
configure.host Separate Solaris/SPARC and x86 baselines 2017-02-02 16:24:03 +00:00
crossconfig.m4 crossconfig.m4: Handle OpenBSD just like NetBSD. 2018-06-18 11:28:53 -06:00
fragment.am PR libstdc++/86450 use -Wabi=2 and simplify -Werror use 2018-07-17 14:18:47 +01:00
linkage.m4
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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.