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2/_I|+ ? '// Allocator traits -*- C++ -*-
// Copyright (C) 2011-2021 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// .
/** @file bits/alloc_traits.h
* This is an internal header file, included by other library headers.
* Do not attempt to use it directly. @headername{memory}
*/
#ifndef _ALLOC_TRAITS_H
#define _ALLOC_TRAITS_H 1
#include
#include
#if __cplusplus >= 201103L
# include
# include
# include
#endif
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
#if __cplusplus >= 201103L
#define __cpp_lib_allocator_traits_is_always_equal 201411
/// @cond undocumented
struct __allocator_traits_base
{
template
struct __rebind : __replace_first_arg<_Tp, _Up> { };
template
struct __rebind<_Tp, _Up,
__void_t::other>>
{ using type = typename _Tp::template rebind<_Up>::other; };
protected:
template
using __pointer = typename _Tp::pointer;
template
using __c_pointer = typename _Tp::const_pointer;
template
using __v_pointer = typename _Tp::void_pointer;
template
using __cv_pointer = typename _Tp::const_void_pointer;
template
using __pocca = typename _Tp::propagate_on_container_copy_assignment;
template
using __pocma = typename _Tp::propagate_on_container_move_assignment;
template
using __pocs = typename _Tp::propagate_on_container_swap;
template
using __equal = typename _Tp::is_always_equal;
};
template
using __alloc_rebind
= typename __allocator_traits_base::template __rebind<_Alloc, _Up>::type;
/// @endcond
/**
* @brief Uniform interface to all allocator types.
* @headerfile memory
* @ingroup allocators
* @since C++11
*/
template
struct allocator_traits : __allocator_traits_base
{
/// The allocator type
typedef _Alloc allocator_type;
/// The allocated type
typedef typename _Alloc::value_type value_type;
/**
* @brief The allocator's pointer type.
*
* @c Alloc::pointer if that type exists, otherwise @c value_type*
*/
using pointer = __detected_or_t;
private:
// Select _Func<_Alloc> or pointer_traits::rebind<_Tp>
template class _Func, typename _Tp, typename = void>