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Jonathan Wakely 638ad333ec Fix non-standard behaviour of std::istream_iterator 
The current implementation of istream_iterator allows the iterator to be
reused after reaching end-of-stream, so that subsequent reads from the
stream can succeed (e.g. if the stream state has been cleared and stream
position changed from EOF). The P0738R2 paper clarified that the
expected behaviour is to set the stream pointer to null after reaching
end-of-stream, preventing further reads.

This implements that requirement, and adds the new default constructor
to std::ostream_iterator.

	* include/bits/stream_iterator.h (istream_iterator::_M_equal()): Make
	private.
	(istream_iterator::_M_read()): Do not check stream state before
	attempting extraction. Set stream pointer to null when extraction
	fails (P0738R2).
	(operator==(const istream_iterator&, const istream_iterator&)): Change
	to be a hidden friend of istream_iterator.
	(operator!=(const istream_iterator&, const istream_iterator&)):
	Likewise.
	(ostream_iterator::ostream_iterator()): Add default constructor.
	(ostream_iterator::ostream_iterator(ostream_type*, const C*)): Use
	addressof.
	* testsuite/24_iterators/istream_iterator/1.cc: New test.
	* testsuite/24_iterators/ostream_iterator/1.cc: New test.
	* testsuite/24_iterators/ostream_iterator/70766.cc: Also check
	constructor taking a string.
	* testsuite/24_iterators/ostream_iterator/requirements/constexpr.cc:
	New test.

From-SVN: r272491
2019-06-19 23:57:10 +01:00
..
config PR libstdc++/85494 use rdseed and rand_s in std::random_device 2019-05-29 15:45:35 +01:00
doc Corrections for C++2a library status table 2019-06-03 14:32:17 +01:00
include Fix non-standard behaviour of std::istream_iterator 2019-06-19 23:57:10 +01:00
libsupc++ PR libstdc++/90682 allow set_terminate(0) and set_unexpected(0) 2019-05-31 11:35:11 +01:00
po PR libstdc++/89466 avoid slow xsltproc command in configure 2019-02-27 11:25:44 +00:00
python Have std::vector printer's iterator return bool for vector<bool> 2019-06-19 23:57:06 +01:00
scripts Remove Profile Mode, deprecated since GCC 7.1 2019-05-13 11:50:21 +01:00
src PR libstdc++/90281 Fix string conversions for filesystem::path 2019-06-17 15:19:04 +01:00
testsuite Fix non-standard behaviour of std::istream_iterator 2019-06-19 23:57:10 +01:00
acinclude.m4 PR libstdc++/85494 use rdseed and rand_s in std::random_device 2019-05-29 15:45:35 +01:00
aclocal.m4
ChangeLog Fix non-standard behaviour of std::istream_iterator 2019-06-19 23:57:10 +01:00
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config.h.in PR libstdc++/85494 use rdseed and rand_s in std::random_device 2019-05-29 15:45:35 +01:00
configure PR libstdc++/90770 fix missing src/debug/Makefile 2019-06-07 20:57:19 +01:00
configure.ac PR libstdc++/85494 use rdseed and rand_s in std::random_device 2019-05-29 15:45:35 +01:00
configure.host Remove obsolete Solaris 10 support 2019-05-14 17:17:23 +00:00
crossconfig.m4 PR libstdc++/89460 Fix Networking TS test failures on HP-UX 2019-03-11 16:28:11 +00:00
fragment.am
linkage.m4
Makefile.am
Makefile.in PR libstdc++/89466 avoid slow xsltproc command in configure 2019-02-27 11:25:44 +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.