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// <scoped_allocator> -*- C++ -*- |
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// Copyright (C) 2011-2013 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. |
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// 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. |
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// 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. |
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// 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/>. |
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/** @file include/scoped_allocator |
* This is a Standard C++ Library header. |
*/ |
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#ifndef _SCOPED_ALLOCATOR |
#define _SCOPED_ALLOCATOR 1 |
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#pragma GCC system_header |
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#if __cplusplus < 201103L |
# include <bits/c++0x_warning.h> |
#else |
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#include <utility> |
#include <tuple> |
#include <bits/alloc_traits.h> |
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namespace std _GLIBCXX_VISIBILITY(default) |
{ |
_GLIBCXX_BEGIN_NAMESPACE_VERSION |
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template<template<typename> class _Pred, typename... _Allocs> |
struct __any_of; |
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template<template<typename> class _Pred, typename _Alloc, typename... _Allocs> |
struct __any_of<_Pred, _Alloc, _Allocs...> |
: __or_<_Pred<_Alloc>, __any_of<_Pred, _Allocs...>> |
{ }; |
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template<template<typename> class _Pred, typename _Alloc> |
struct __any_of<_Pred, _Alloc> |
: _Pred<_Alloc> |
{ }; |
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/** |
* @addtogroup allocators |
* @{ |
*/ |
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template<typename _Alloc> |
struct __propagate_on_copy |
: allocator_traits<_Alloc>::propagate_on_container_copy_assignment |
{ }; |
template<typename _Alloc> |
struct __propagate_on_move |
: allocator_traits<_Alloc>::propagate_on_container_move_assignment |
{ }; |
template<typename _Alloc> |
struct __propagate_on_swap |
: allocator_traits<_Alloc>::propagate_on_container_swap |
{ }; |
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template<typename _Alloc> |
inline auto |
__do_outermost(_Alloc& __a, _Alloc*) -> decltype(__a.outer_allocator()) |
{ return __a.outer_allocator(); } |
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template<typename _Alloc> |
inline _Alloc& |
__do_outermost(_Alloc& __a, ...) |
{ return __a; } |
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// TODO: make recursive (see note in 20.12.4/1) |
template<typename _Alloc> |
inline auto |
__outermost(_Alloc& __a) -> decltype(__do_outermost(__a, &__a)) |
{ return __do_outermost(__a, &__a); } |
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template<typename _OuterAlloc, typename... _InnerAllocs> |
class scoped_allocator_adaptor; |
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template<typename...> |
struct __inner_type_impl; |
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template<typename _Outer> |
struct __inner_type_impl<_Outer> |
{ |
typedef scoped_allocator_adaptor<_Outer> __type; |
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__inner_type_impl() = default; |
__inner_type_impl(const __inner_type_impl&) = default; |
__inner_type_impl(__inner_type_impl&&) = default; |
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template<typename _Alloc> |
__inner_type_impl(const __inner_type_impl<_Alloc>& __other) |
{ } |
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template<typename _Alloc> |
__inner_type_impl(__inner_type_impl<_Alloc>&& __other) |
{ } |
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__type& |
_M_get(__type* __p) noexcept { return *__p; } |
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const __type& |
_M_get(const __type* __p) const noexcept { return *__p; } |
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tuple<> |
_M_tie() const noexcept { return tuple<>(); } |
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bool |
operator==(const __inner_type_impl&) const noexcept |
{ return true; } |
}; |
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template<typename _Outer, typename _InnerHead, typename... _InnerTail> |
struct __inner_type_impl<_Outer, _InnerHead, _InnerTail...> |
{ |
typedef scoped_allocator_adaptor<_InnerHead, _InnerTail...> __type; |
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__inner_type_impl() = default; |
__inner_type_impl(const __inner_type_impl&) = default; |
__inner_type_impl(__inner_type_impl&&) = default; |
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template<typename... _Allocs> |
__inner_type_impl(const __inner_type_impl<_Allocs...>& __other) |
: _M_inner(__other._M_inner) { } |
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template<typename... _Allocs> |
__inner_type_impl(__inner_type_impl<_Allocs...>&& __other) |
: _M_inner(std::move(__other._M_inner)) { } |
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template<typename... _Args> |
explicit |
__inner_type_impl(_Args&&... __args) |
: _M_inner(std::forward<_Args>(__args)...) { } |
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__type& |
_M_get(void*) noexcept { return _M_inner; } |
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const __type& |
_M_get(const void*) const noexcept { return _M_inner; } |
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tuple<const _InnerHead&, const _InnerTail&...> |
_M_tie() const noexcept |
{ return _M_inner._M_tie(); } |
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bool |
operator==(const __inner_type_impl& __other) const noexcept |
{ return _M_inner == __other._M_inner; } |
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private: |
template<typename...> friend class __inner_type_impl; |
template<typename, typename...> friend class scoped_allocator_adaptor; |
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__type _M_inner; |
}; |
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/// Primary class template. |
template<typename _OuterAlloc, typename... _InnerAllocs> |
class scoped_allocator_adaptor |
: public _OuterAlloc |
{ |
typedef allocator_traits<_OuterAlloc> __traits; |
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typedef __inner_type_impl<_OuterAlloc, _InnerAllocs...> __inner_type; |
__inner_type _M_inner; |
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template<typename _Outer, typename... _Inner> |
friend class scoped_allocator_adaptor; |
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template<typename...> |
friend class __inner_type_impl; |
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tuple<const _OuterAlloc&, const _InnerAllocs&...> |
_M_tie() const noexcept |
{ return std::tuple_cat(std::tie(outer_allocator()), _M_inner._M_tie()); } |
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template<typename _Alloc> |
using __outermost_type = typename |
std::decay<decltype(__outermost(std::declval<_Alloc&>()))>::type; |
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template<typename _Alloc> |
using __outermost_alloc_traits |
= allocator_traits<__outermost_type<_Alloc>>; |
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template<typename _Tp, typename... _Args> |
void |
_M_construct(__uses_alloc0, _Tp* __p, _Args&&... __args) |
{ |
typedef __outermost_alloc_traits<scoped_allocator_adaptor> _O_traits; |
_O_traits::construct(__outermost(*this), __p, |
std::forward<_Args>(__args)...); |
} |
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typedef __uses_alloc1<typename __inner_type::__type> __uses_alloc1_; |
typedef __uses_alloc2<typename __inner_type::__type> __uses_alloc2_; |
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template<typename _Tp, typename... _Args> |
void |
_M_construct(__uses_alloc1_, _Tp* __p, _Args&&... __args) |
{ |
typedef __outermost_alloc_traits<scoped_allocator_adaptor> _O_traits; |
_O_traits::construct(__outermost(*this), __p, |
allocator_arg, inner_allocator(), |
std::forward<_Args>(__args)...); |
} |
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template<typename _Tp, typename... _Args> |
void |
_M_construct(__uses_alloc2_, _Tp* __p, _Args&&... __args) |
{ |
typedef __outermost_alloc_traits<scoped_allocator_adaptor> _O_traits; |
_O_traits::construct(__outermost(*this), __p, |
std::forward<_Args>(__args)..., |
inner_allocator()); |
} |
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template<typename _Alloc> |
static _Alloc |
_S_select_on_copy(const _Alloc& __a) |
{ |
typedef allocator_traits<_Alloc> __a_traits; |
return __a_traits::select_on_container_copy_construction(__a); |
} |
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template<std::size_t... _Indices> |
scoped_allocator_adaptor(tuple<const _OuterAlloc&, |
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))...) |
{ } |
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public: |
typedef _OuterAlloc outer_allocator_type; |
typedef typename __inner_type::__type inner_allocator_type; |
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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; |
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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; |
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template <class _Tp> |
struct rebind |
{ |
typedef scoped_allocator_adaptor< |
typename __traits::template rebind_alloc<_Tp>, |
_InnerAllocs...> other; |
}; |
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scoped_allocator_adaptor() : _OuterAlloc(), _M_inner() { } |
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template<typename _Outer2> |
scoped_allocator_adaptor(_Outer2&& __outer, |
const _InnerAllocs&... __inner) |
: _OuterAlloc(std::forward<_Outer2>(__outer)), |
_M_inner(__inner...) |
{ } |
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scoped_allocator_adaptor(const scoped_allocator_adaptor& __other) |
: _OuterAlloc(__other.outer_allocator()), |
_M_inner(__other._M_inner) |
{ } |
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scoped_allocator_adaptor(scoped_allocator_adaptor&& __other) |
: _OuterAlloc(std::move(__other.outer_allocator())), |
_M_inner(std::move(__other._M_inner)) |
{ } |
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template<typename _Outer2> |
scoped_allocator_adaptor( |
const scoped_allocator_adaptor<_Outer2, _InnerAllocs...>& __other) |
: _OuterAlloc(__other.outer_allocator()), |
_M_inner(__other._M_inner) |
{ } |
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template<typename _Outer2> |
scoped_allocator_adaptor( |
scoped_allocator_adaptor<_Outer2, _InnerAllocs...>&& __other) |
: _OuterAlloc(std::move(__other.outer_allocator())), |
_M_inner(std::move(__other._M_inner)) |
{ } |
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inner_allocator_type& inner_allocator() noexcept |
{ return _M_inner._M_get(this); } |
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const inner_allocator_type& inner_allocator() const noexcept |
{ return _M_inner._M_get(this); } |
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outer_allocator_type& outer_allocator() noexcept |
{ return static_cast<_OuterAlloc&>(*this); } |
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const outer_allocator_type& outer_allocator() const noexcept |
{ return static_cast<const _OuterAlloc&>(*this); } |
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pointer allocate(size_type __n) |
{ return __traits::allocate(outer_allocator(), __n); } |
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pointer allocate(size_type __n, const_void_pointer __hint) |
{ return __traits::allocate(outer_allocator(), __n, __hint); } |
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void deallocate(pointer __p, size_type __n) |
{ return __traits::deallocate(outer_allocator(), __p, __n); } |
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size_type max_size() const |
{ return __traits::max_size(outer_allocator()); } |
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template<typename _Tp, typename... _Args> |
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)...); |
} |
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template<typename _T1, typename _T2, typename... _Args1, |
typename... _Args2> |
void |
construct(pair<_T1, _T2>* __p, piecewise_construct_t, |
tuple<_Args1...> __x, tuple<_Args2...> __y) |
{ |
// _GLIBCXX_RESOLVE_LIB_DEFECTS |
// 2203. wrong argument types for piecewise construction |
auto& __inner = inner_allocator(); |
auto __x_use_tag |
= __use_alloc<_T1, inner_allocator_type, _Args1...>(__inner); |
auto __y_use_tag |
= __use_alloc<_T2, inner_allocator_type, _Args2...>(__inner); |
typedef __outermost_alloc_traits<scoped_allocator_adaptor> _O_traits; |
_O_traits::construct(__outermost(*this), __p, piecewise_construct, |
_M_construct_p(__x_use_tag, __x), |
_M_construct_p(__y_use_tag, __y)); |
} |
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template<typename _T1, typename _T2> |
void |
construct(pair<_T1, _T2>* __p) |
{ construct(__p, piecewise_construct, tuple<>(), tuple<>()); } |
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template<typename _T1, typename _T2, typename _Up, typename _Vp> |
void |
construct(pair<_T1, _T2>* __p, _Up&& __u, _Vp&& __v) |
{ |
construct(__p, piecewise_construct, |
std::forward_as_tuple(std::forward<_Up>(__u)), |
std::forward_as_tuple(std::forward<_Vp>(__v))); |
} |
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template<typename _T1, typename _T2, typename _Up, typename _Vp> |
void |
construct(pair<_T1, _T2>* __p, const pair<_Up, _Vp>& __x) |
{ |
construct(__p, piecewise_construct, |
std::forward_as_tuple(__x.first), |
std::forward_as_tuple(__x.second)); |
} |
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template<typename _T1, typename _T2, typename _Up, typename _Vp> |
void |
construct(pair<_T1, _T2>* __p, pair<_Up, _Vp>&& __x) |
{ |
construct(__p, piecewise_construct, |
std::forward_as_tuple(std::forward<_Up>(__x.first)), |
std::forward_as_tuple(std::forward<_Vp>(__x.second))); |
} |
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template<typename _Tp> |
void destroy(_Tp* __p) |
{ |
typedef __outermost_alloc_traits<scoped_allocator_adaptor> _O_traits; |
_O_traits::destroy(__outermost(*this), __p); |
} |
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scoped_allocator_adaptor |
select_on_container_copy_construction() const |
{ |
typedef typename _Build_index_tuple<sizeof...(_InnerAllocs)>::__type |
_Indices; |
return scoped_allocator_adaptor(_M_tie(), _Indices()); |
} |
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template <typename _OutA1, typename _OutA2, typename... _InA> |
friend bool |
operator==(const scoped_allocator_adaptor<_OutA1, _InA...>& __a, |
const scoped_allocator_adaptor<_OutA2, _InA...>& __b) noexcept; |
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private: |
template<typename _Tuple> |
_Tuple&& |
_M_construct_p(__uses_alloc0, _Tuple& __t) |
{ return std::move(__t); } |
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template<typename... _Args> |
std::tuple<allocator_arg_t, inner_allocator_type&, _Args...> |
_M_construct_p(__uses_alloc1_, std::tuple<_Args...>& __t) |
{ |
typedef std::tuple<allocator_arg_t, inner_allocator_type&> _Tuple; |
return std::tuple_cat(_Tuple(allocator_arg, inner_allocator()), |
std::move(__t)); |
} |
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template<typename... _Args> |
std::tuple<_Args..., inner_allocator_type&> |
_M_construct_p(__uses_alloc2_, std::tuple<_Args...>& __t) |
{ |
typedef std::tuple<inner_allocator_type&> _Tuple; |
return std::tuple_cat(std::move(__t), _Tuple(inner_allocator())); |
} |
}; |
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template <typename _OutA1, typename _OutA2, typename... _InA> |
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; |
} |
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template <typename _OutA1, typename _OutA2, typename... _InA> |
inline bool |
operator!=(const scoped_allocator_adaptor<_OutA1, _InA...>& __a, |
const scoped_allocator_adaptor<_OutA2, _InA...>& __b) noexcept |
{ return !(__a == __b); } |
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/// @} |
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_GLIBCXX_END_NAMESPACE_VERSION |
} // namespace |
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#endif // C++11 |
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#endif // _SCOPED_ALLOCATOR |