mirror of
https://github.com/autc04/Retro68.git
synced 2024-09-07 13:54:33 +00:00
167 lines
5.8 KiB
C++
167 lines
5.8 KiB
C++
// Allocator traits -*- C++ -*-
|
|
|
|
// Copyright (C) 2011-2019 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
|
|
// <http://www.gnu.org/licenses/>.
|
|
|
|
/** @file ext/alloc_traits.h
|
|
* This file is a GNU extension to the Standard C++ Library.
|
|
*/
|
|
|
|
#ifndef _EXT_ALLOC_TRAITS_H
|
|
#define _EXT_ALLOC_TRAITS_H 1
|
|
|
|
#pragma GCC system_header
|
|
|
|
#if __cplusplus >= 201103L
|
|
# include <bits/move.h>
|
|
# include <bits/alloc_traits.h>
|
|
#else
|
|
# include <bits/allocator.h> // for __alloc_swap
|
|
#endif
|
|
|
|
namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
|
|
{
|
|
_GLIBCXX_BEGIN_NAMESPACE_VERSION
|
|
|
|
/**
|
|
* @brief Uniform interface to C++98 and C++11 allocators.
|
|
* @ingroup allocators
|
|
*/
|
|
template<typename _Alloc, typename = typename _Alloc::value_type>
|
|
struct __alloc_traits
|
|
#if __cplusplus >= 201103L
|
|
: std::allocator_traits<_Alloc>
|
|
#endif
|
|
{
|
|
typedef _Alloc allocator_type;
|
|
#if __cplusplus >= 201103L
|
|
typedef std::allocator_traits<_Alloc> _Base_type;
|
|
typedef typename _Base_type::value_type value_type;
|
|
typedef typename _Base_type::pointer pointer;
|
|
typedef typename _Base_type::const_pointer const_pointer;
|
|
typedef typename _Base_type::size_type size_type;
|
|
typedef typename _Base_type::difference_type difference_type;
|
|
// C++11 allocators do not define reference or const_reference
|
|
typedef value_type& reference;
|
|
typedef const value_type& const_reference;
|
|
using _Base_type::allocate;
|
|
using _Base_type::deallocate;
|
|
using _Base_type::construct;
|
|
using _Base_type::destroy;
|
|
using _Base_type::max_size;
|
|
|
|
private:
|
|
template<typename _Ptr>
|
|
using __is_custom_pointer
|
|
= std::__and_<std::is_same<pointer, _Ptr>,
|
|
std::__not_<std::is_pointer<_Ptr>>>;
|
|
|
|
public:
|
|
// overload construct for non-standard pointer types
|
|
template<typename _Ptr, typename... _Args>
|
|
static typename std::enable_if<__is_custom_pointer<_Ptr>::value>::type
|
|
construct(_Alloc& __a, _Ptr __p, _Args&&... __args)
|
|
noexcept(noexcept(_Base_type::construct(__a, std::__to_address(__p),
|
|
std::forward<_Args>(__args)...)))
|
|
{
|
|
_Base_type::construct(__a, std::__to_address(__p),
|
|
std::forward<_Args>(__args)...);
|
|
}
|
|
|
|
// overload destroy for non-standard pointer types
|
|
template<typename _Ptr>
|
|
static typename std::enable_if<__is_custom_pointer<_Ptr>::value>::type
|
|
destroy(_Alloc& __a, _Ptr __p)
|
|
noexcept(noexcept(_Base_type::destroy(__a, std::__to_address(__p))))
|
|
{ _Base_type::destroy(__a, std::__to_address(__p)); }
|
|
|
|
static _Alloc _S_select_on_copy(const _Alloc& __a)
|
|
{ return _Base_type::select_on_container_copy_construction(__a); }
|
|
|
|
static void _S_on_swap(_Alloc& __a, _Alloc& __b)
|
|
{ std::__alloc_on_swap(__a, __b); }
|
|
|
|
static constexpr bool _S_propagate_on_copy_assign()
|
|
{ return _Base_type::propagate_on_container_copy_assignment::value; }
|
|
|
|
static constexpr bool _S_propagate_on_move_assign()
|
|
{ return _Base_type::propagate_on_container_move_assignment::value; }
|
|
|
|
static constexpr bool _S_propagate_on_swap()
|
|
{ return _Base_type::propagate_on_container_swap::value; }
|
|
|
|
static constexpr bool _S_always_equal()
|
|
{ return _Base_type::is_always_equal::value; }
|
|
|
|
static constexpr bool _S_nothrow_move()
|
|
{ return _S_propagate_on_move_assign() || _S_always_equal(); }
|
|
|
|
template<typename _Tp>
|
|
struct rebind
|
|
{ typedef typename _Base_type::template rebind_alloc<_Tp> other; };
|
|
#else
|
|
|
|
typedef typename _Alloc::pointer pointer;
|
|
typedef typename _Alloc::const_pointer const_pointer;
|
|
typedef typename _Alloc::value_type value_type;
|
|
typedef typename _Alloc::reference reference;
|
|
typedef typename _Alloc::const_reference const_reference;
|
|
typedef typename _Alloc::size_type size_type;
|
|
typedef typename _Alloc::difference_type difference_type;
|
|
|
|
_GLIBCXX_NODISCARD static pointer
|
|
allocate(_Alloc& __a, size_type __n)
|
|
{ return __a.allocate(__n); }
|
|
|
|
static void deallocate(_Alloc& __a, pointer __p, size_type __n)
|
|
{ __a.deallocate(__p, __n); }
|
|
|
|
template<typename _Tp>
|
|
static void construct(_Alloc& __a, pointer __p, const _Tp& __arg)
|
|
{ __a.construct(__p, __arg); }
|
|
|
|
static void destroy(_Alloc& __a, pointer __p)
|
|
{ __a.destroy(__p); }
|
|
|
|
static size_type max_size(const _Alloc& __a)
|
|
{ return __a.max_size(); }
|
|
|
|
static const _Alloc& _S_select_on_copy(const _Alloc& __a) { return __a; }
|
|
|
|
static void _S_on_swap(_Alloc& __a, _Alloc& __b)
|
|
{
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 431. Swapping containers with unequal allocators.
|
|
std::__alloc_swap<_Alloc>::_S_do_it(__a, __b);
|
|
}
|
|
|
|
template<typename _Tp>
|
|
struct rebind
|
|
{ typedef typename _Alloc::template rebind<_Tp>::other other; };
|
|
#endif
|
|
};
|
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
} // namespace __gnu_cxx
|
|
|
|
#endif
|