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//  -*- C++ -*-

// Copyright (C) 2011 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 include/scoped_allocator

 *  This is a Standard C++ Library header.

 */

#ifndef _SCOPED_ALLOCATOR

#define _SCOPED_ALLOCATOR 1

#pragma GCC system_header

#ifndef __GXX_EXPERIMENTAL_CXX0X__

# include 

#else

#include 

#include 

#include 

namespace std _GLIBCXX_VISIBILITY(default)

{

_GLIBCXX_BEGIN_NAMESPACE_VERSION

  template class _Pred, typename... _Allocs>

    struct __any_of;

  template class _Pred, typename _Alloc, typename... _Allocs>

    struct __any_of<_Pred, _Alloc, _Allocs...>

    : __or_<_Pred<_Alloc>, __any_of<_Pred, _Allocs...>>

    { };

  template class _Pred, typename _Alloc>

    struct __any_of<_Pred, _Alloc>

    : _Pred<_Alloc>

    { };

  /**

   * @addtogroup allocators

   * @{

   */

  template

    struct __propagate_on_copy

    : allocator_traits<_Alloc>::propagate_on_container_copy_assignment

    { };

  template

    struct __propagate_on_move

    : allocator_traits<_Alloc>::propagate_on_container_move_assignment

    { };

  template

    struct __propagate_on_swap

    : allocator_traits<_Alloc>::propagate_on_container_swap

    { };

  template

    inline auto

    __do_outermost(_Alloc& __a, _Alloc&) -> decltype(__a.outer_allocator())

    { return __a.outer_allocator(); }

  template

    inline _Alloc&

    __do_outermost(_Alloc& __a, ...)

    { return __a; }

  template

    inline auto

    __outermost(_Alloc& __a) -> decltype(__do_outermost(__a, __a))

    { return __do_outermost(__a, __a); }

  template

    class scoped_allocator_adaptor;

  template

    struct __inner_type_impl;

  template

    struct __inner_type_impl<_Outer>

    {

      typedef scoped_allocator_adaptor<_Outer> __type;

      __inner_type_impl() = default;

      __inner_type_impl(const __inner_type_impl&) = default;

      __inner_type_impl(__inner_type_impl&&) = default;

      template

      __inner_type_impl(const __inner_type_impl<_Alloc>& __other)

      { }

      template

      __inner_type_impl(__inner_type_impl<_Alloc>&& __other)

      { }

      __type&

      _M_get(__type* __p) noexcept { return *__p; }

      const __type&

      _M_get(const __type* __p) const noexcept { return *__p; }

      tuple<>

      _M_tie() const noexcept { return tuple<>(); }

      bool

      operator==(const __inner_type_impl&) const noexcept

      { return true; }

    };

  template

    struct __inner_type_impl<_Outer, _InnerHead, _InnerTail...>

    {

      typedef scoped_allocator_adaptor<_InnerHead, _InnerTail...> __type;

      __inner_type_impl() = default;

      __inner_type_impl(const __inner_type_impl&) = default;

      __inner_type_impl(__inner_type_impl&&) = default;

      template

      __inner_type_impl(const __inner_type_impl<_Allocs...>& __other)

      : _M_inner(__other._M_inner) { }

      template

      __inner_type_impl(__inner_type_impl<_Allocs...>&& __other)

      : _M_inner(std::move(__other._M_inner)) { }

    template

      explicit

      __inner_type_impl(_Args&&... __args)

      : _M_inner(std::forward<_Args>(__args)...) { }

      __type&

      _M_get(void*) noexcept { return _M_inner; }

      const __type&

      _M_get(const void*) const noexcept { return _M_inner; }

      tuple

      _M_tie() const noexcept

      { return _M_inner._M_tie(); }

      bool

      operator==(const __inner_type_impl& __other) const noexcept

      { return _M_inner == __other._M_inner; }

    private:

      template friend class __inner_type_impl;

      template friend class scoped_allocator_adaptor;

      __type _M_inner;

    };

  /// Primary class template.

  template

    class scoped_allocator_adaptor

    : public _OuterAlloc

    {

      typedef allocator_traits<_OuterAlloc> __traits;

      typedef __inner_type_impl<_OuterAlloc, _InnerAllocs...> __inner_type;

      __inner_type _M_inner;

      template

        friend class scoped_allocator_adaptor;

      template

        friend class __inner_type_impl;

      tuple

      _M_tie() const noexcept

      { return std::tuple_cat(std::tie(outer_allocator()), _M_inner._M_tie()); }

      template

        void

        _M_construct(__uses_alloc0, _Tp* __p, _Args&&... __args)

        {

          auto& __outer = __outermost(*this);

          typedef typename std::decay::type __outer_type;

          typedef allocator_traits<__outer_type> __o_traits;

          __o_traits::construct(__outer, __p, std::forward<_Args>(__args)...);

        }

      typedef __uses_alloc1 __uses_alloc1_;

      typedef __uses_alloc2 __uses_alloc2_;

      template

        void

        _M_construct(__uses_alloc1_, _Tp* __p, _Args&&... __args)

        {

          auto& __outer = __outermost(*this);

          typedef typename std::decay::type __outer_type;

          typedef allocator_traits<__outer_type> __o_traits;

          __o_traits::construct(__outer, __p, allocator_arg, inner_allocator(),

                                std::forward<_Args>(__args)...);

        }

      template

        void

        _M_construct(__uses_alloc2_, _Tp* __p, _Args&&... __args)

        {

          auto& __outer = __outermost(*this);

          typedef typename std::decay::type __outer_type;

          typedef allocator_traits<__outer_type> __o_traits;

          __o_traits::construct(__outer, __p, std::forward<_Args>(__args)...,

                                inner_allocator());

        }

      template

        static _Alloc

        _S_select_on_copy(const _Alloc& __a)

        {

          typedef allocator_traits<_Alloc> __a_traits;

          return __a_traits::select_on_container_copy_construction(__a);

        }

      template

        scoped_allocator_adaptor(tuple

                                       const _InnerAllocs&...> __refs,

                                 _Index_tuple<_Indices...>)

        : _OuterAlloc(_S_select_on_copy(std::get<0>(__refs))),

          _M_inner(_S_select_on_copy(std::get<_Indices+1>(__refs))...)

        { }

    public:

      typedef _OuterAlloc                       outer_allocator_type;

      typedef typename __inner_type::__type     inner_allocator_type;

      typedef typename __traits::value_type             value_type;

      typedef typename __traits::size_type              size_type;

      typedef typename __traits::difference_type        difference_type;

      typedef typename __traits::pointer                pointer;

      typedef typename __traits::const_pointer          const_pointer;

      typedef typename __traits::void_pointer           void_pointer;

      typedef typename __traits::const_void_pointer     const_void_pointer;

      typedef typename conditional<

        __any_of<__propagate_on_copy, _OuterAlloc, _InnerAllocs...>::value,

        true_type, false_type>::type propagate_on_container_copy_assignment;

      typedef typename conditional<

        __any_of<__propagate_on_move, _OuterAlloc, _InnerAllocs...>::value,

        true_type, false_type>::type propagate_on_container_move_assignment;

      typedef typename conditional<

        __any_of<__propagate_on_swap, _OuterAlloc, _InnerAllocs...>::value,

        true_type, false_type>::type propagate_on_container_swap;

      template 

        struct rebind

        {

          typedef scoped_allocator_adaptor<

            typename __traits::template rebind_alloc<_Tp>,

            _InnerAllocs...> other;

        };

      scoped_allocator_adaptor() : _OuterAlloc(), _M_inner() { }

      template

        scoped_allocator_adaptor(_Outer2&& __outer,

                                 const _InnerAllocs&... __inner)

        : _OuterAlloc(std::forward<_Outer2>(__outer)),

          _M_inner(__inner...)

        { }

      scoped_allocator_adaptor(const scoped_allocator_adaptor& __other)

      : _OuterAlloc(__other.outer_allocator()),

        _M_inner(__other._M_inner)

      { }

      scoped_allocator_adaptor(scoped_allocator_adaptor&& __other)

      : _OuterAlloc(std::move(__other.outer_allocator())),

        _M_inner(std::move(__other._M_inner))

      { }

      template

        scoped_allocator_adaptor(

            const scoped_allocator_adaptor<_Outer2, _InnerAllocs...>& __other)

        : _OuterAlloc(__other.outer_allocator()),

          _M_inner(__other._M_inner)

        { }

      template

        scoped_allocator_adaptor(

            scoped_allocator_adaptor<_Outer2, _InnerAllocs...>&& __other)

        : _OuterAlloc(std::move(__other.outer_allocator())),

          _M_inner(std::move(__other._M_inner))

        { }

      inner_allocator_type& inner_allocator() noexcept

      { return _M_inner._M_get(this); }

      const inner_allocator_type& inner_allocator() const noexcept

      { return _M_inner._M_get(this); }

      outer_allocator_type& outer_allocator() noexcept

      { return static_cast<_OuterAlloc&>(*this); }

      const outer_allocator_type& outer_allocator() const noexcept

      { return static_cast(*this); }

      pointer allocate(size_type __n)

      { return __traits::allocate(outer_allocator(), __n); }

      pointer allocate(size_type __n, const_void_pointer __hint)

      { return __traits::allocate(outer_allocator(), __n, __hint); }

      void deallocate(pointer __p, size_type __n)

      { return __traits::deallocate(outer_allocator(), __p, __n); }

      size_type max_size() const

      { return __traits::max_size(outer_allocator()); }

      template

        void construct(_Tp* __p, _Args&&... __args)

        {

          auto& __inner = inner_allocator();

          auto __use_tag

            = __use_alloc<_Tp, inner_allocator_type, _Args...>(__inner);

          _M_construct(__use_tag, __p, std::forward<_Args>(__args)...);

        }

      // TODO: construct pairs

      template

        void destroy(_Tp* __p)

        {

          auto& __outer = __outermost(*this);

          typedef typename std::decay::type __outer_type;

          allocator_traits<__outer_type>::destroy(__outer, __p);

        }

      scoped_allocator_adaptor

      select_on_container_copy_construction() const

      {

        typedef typename _Build_index_tuple::__type

            _Indices;

        return scoped_allocator_adaptor(_M_tie(), _Indices());

      }

      template 

      friend bool

      operator==(const scoped_allocator_adaptor<_OutA1, _InA...>& __a,

                 const scoped_allocator_adaptor<_OutA2, _InA...>& __b) noexcept;

    };

  template 

    inline bool

    operator==(const scoped_allocator_adaptor<_OutA1, _InA...>& __a,

               const scoped_allocator_adaptor<_OutA2, _InA...>& __b) noexcept

    {

      return __a.outer_allocator() == __b.outer_allocator()

          && __a._M_inner == __b._M_inner;

    }

  template 

    inline bool

    operator!=(const scoped_allocator_adaptor<_OutA1, _InA...>& __a,

               const scoped_allocator_adaptor<_OutA2, _InA...>& __b) noexcept

    { return !(__a == __b); }

  /// @}

_GLIBCXX_END_NAMESPACE_VERSION

} // namespace

#endif // __GXX_EXPERIMENTAL_CXX0X__

#endif // _SCOPED_ALLOCATOR