r243006 - in /trunk/libstdc++-v3: ChangeLog inc...

[ville@gcc.gnu.org]

Author: ville
Date: Wed Nov 30 09:59:50 2016
New Revision: 243006

URL: https://gcc.gnu.org/viewcvs?rev=243006&root=gcc&view=rev
Log:
Implement LWG 2534, Constrain rvalue stream operators.
* include/std/istream (__is_convertible_to_basic_istream): New.
(__is_extractable): Likewise.
(operator>>(basic_istream<_CharT, _Traits>&&, _Tp&&)):
Turn the stream parameter into a template parameter
and constrain.
* include/std/ostream (__is_convertible_to_basic_ostream): New.
(__is_insertable): Likewise.
(operator<<(basic_ostream<_CharT, _Traits>&&, const _Tp&)):
Turn the stream parameter into a template parameter
and constrain.
* testsuite/27_io/basic_istream/extractors_other/char/4.cc: New.
* testsuite/27_io/basic_istream/extractors_other/wchar_t/4.cc:
Likewise.
* testsuite/27_io/basic_ostream/inserters_other/char/6.cc: Likewise.
* testsuite/27_io/basic_ostream/inserters_other/wchar_t/6.cc: Likewise.

Added:
    trunk/libstdc++-v3/testsuite/27_io/basic_istream/extractors_other/char/4.cc
    trunk/libstdc++-v3/testsuite/27_io/basic_istream/extractors_other/wchar_t/4.cc
    trunk/libstdc++-v3/testsuite/27_io/basic_ostream/inserters_other/char/6.cc
    trunk/libstdc++-v3/testsuite/27_io/basic_ostream/inserters_other/wchar_t/6.cc
Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/std/istream
    trunk/libstdc++-v3/include/std/ostream