r245452 - in /branches/gcc-6-branch/libstdc++-v...

redi@gcc.gnu.org redi@gcc.gnu.org
Tue Feb 14 20:08:00 GMT 2017


Author: redi
Date: Tue Feb 14 20:08:12 2017
New Revision: 245452

URL: https://gcc.gnu.org/viewcvs?rev=245452&root=gcc&view=rev
Log:
PR72792 PR72793 relax requirements on rebind members

Backport from mainline
2017-01-20  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/72792
	* include/bits/alloc_traits.h (__allocator_traits_base::__diff_type)
	(__allocator_traits_base::__size_type): Remove.
	(allocator_traits::_Ptr): New class template to detect const and void
	pointer types without instantiating pointer_traits::rebind
	unnecessarily.
	(allocator_traits::_Diff): Likewise for detecting difference_type.
	(allocator_traits::_Size): New class template to detect size_type
	without instantiating make_unsigned unnecessarily.
	* include/bits/ptr_traits.h (pointer_traits::element_type): Use
	__detected_or_t instead of __detected_or_t_.
	* include/std/type_traits (__detected_or_t_): Remove.
	* testsuite/20_util/allocator_traits/members/pointers.cc: New test.

	PR libstdc++/72792
	PR libstdc++/72793
	* include/bits/alloc_traits.h (__allocator_traits_base::__rebind):
	Replace with class template using void_t.
	(__alloc_rebind): Define in terms of
	__allocator_traits_base::__rebind.
	(allocator_traits): Remove unconditional static_assert for
	rebind_alloc.
	* include/bits/ptr_traits.h (__replace_first_arg): Remove type member.
	(pointer_traits::__rebind): Replace with class template using void_t.
	(pointer_traits::rebind): Define in terms of __rebind.
	(pointer_traits): Remove unconditional static_assert for rebind.
	* testsuite/20_util/allocator_traits/members/rebind_alloc.cc: New test.
	* testsuite/20_util/pointer_traits/rebind.cc: New test.

Added:
    branches/gcc-6-branch/libstdc++-v3/testsuite/20_util/allocator_traits/members/pointers.cc
    branches/gcc-6-branch/libstdc++-v3/testsuite/20_util/allocator_traits/members/rebind_alloc.cc
    branches/gcc-6-branch/libstdc++-v3/testsuite/20_util/pointer_traits/rebind.cc
Modified:
    branches/gcc-6-branch/libstdc++-v3/ChangeLog
    branches/gcc-6-branch/libstdc++-v3/include/bits/alloc_traits.h
    branches/gcc-6-branch/libstdc++-v3/include/bits/ptr_traits.h
    branches/gcc-6-branch/libstdc++-v3/include/std/type_traits



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