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r248967 - in /trunk/libstdc++-v3: ChangeLog inc...
- From: redi at gcc dot gnu dot org
- To: gcc-cvs at gcc dot gnu dot org
- Date: Wed, 07 Jun 2017 12:35:08 -0000
- Subject: r248967 - in /trunk/libstdc++-v3: ChangeLog inc...
Author: redi
Date: Wed Jun 7 12:35:08 2017
New Revision: 248967
URL: https://gcc.gnu.org/viewcvs?rev=248967&root=gcc&view=rev
Log:
Add C++17 deduction guide for std::basic_string (P0433R2, partial)
* include/bits/alloc_traits.h (__is_allocator, _RequireAllocator):
New trait and alias for detecting Allocator-like types.
* include/bits/basic_string.h (basic_string): Add deduction guide
from P0433.
* include/ext/alloc_traits.h (__gnu_cxx::__alloc_traits): Add template
parameter with default template argument that causes substitution
failures for types that cannot be allocators.
* testsuite/21_strings/basic_string/cons/char/deduction.cc: New.
* testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc: New.
Added:
trunk/libstdc++-v3/testsuite/21_strings/basic_string/cons/char/deduction.cc
trunk/libstdc++-v3/testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/alloc_traits.h
trunk/libstdc++-v3/include/bits/basic_string.h
trunk/libstdc++-v3/include/ext/alloc_traits.h