--- /dev/null
+// Allocator traits -*- C++ -*-
+
+// Copyright (C) 2011, 2012 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
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+# include <bits/move.h>
+# include <bits/alloc_traits.h>
+#else
+# include <bits/allocator.h> // for __alloc_swap
+#endif
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+ template<typename> struct allocator;
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
+
+namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ template<typename _Alloc>
+ struct __allocator_always_compares_equal
+ { static const bool value = false; };
+
+ template<typename _Alloc>
+ const bool __allocator_always_compares_equal<_Alloc>::value;
+
+ template<typename _Tp>
+ struct __allocator_always_compares_equal<std::allocator<_Tp>>
+ { static const bool value = true; };
+
+ template<typename _Tp>
+ const bool __allocator_always_compares_equal<std::allocator<_Tp>>::value;
+
+ template<typename, typename> struct array_allocator;
+
+ template<typename _Tp, typename _Array>
+ struct __allocator_always_compares_equal<array_allocator<_Tp, _Array>>
+ { static const bool value = true; };
+
+ template<typename _Tp, typename _Array>
+ const bool
+ __allocator_always_compares_equal<array_allocator<_Tp, _Array>>::value;
+
+ template<typename> struct mt_allocator;
+
+ template<typename _Tp>
+ struct __allocator_always_compares_equal<mt_allocator<_Tp>>
+ { static const bool value = true; };
+
+ template<typename _Tp>
+ const bool __allocator_always_compares_equal<mt_allocator<_Tp>>::value;
+
+ template<typename> struct new_allocator;
+
+ template<typename _Tp>
+ struct __allocator_always_compares_equal<new_allocator<_Tp>>
+ { static const bool value = true; };
+
+ template<typename _Tp>
+ const bool __allocator_always_compares_equal<new_allocator<_Tp>>::value;
+
+ template<typename> struct pool_allocator;
+
+ template<typename _Tp>
+ struct __allocator_always_compares_equal<pool_allocator<_Tp>>
+ { static const bool value = true; };
+
+ template<typename _Tp>
+ const bool __allocator_always_compares_equal<pool_allocator<_Tp>>::value;
+#endif
+
+/**
+ * @brief Uniform interface to C++98 and C++0x allocators.
+ * @ingroup allocators
+*/
+template<typename _Alloc>
+ struct __alloc_traits
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ : std::allocator_traits<_Alloc>
+#endif
+ {
+ typedef _Alloc allocator_type;
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ 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;
+ // C++0x 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>
+ struct __is_custom_pointer
+ : std::integral_constant<bool, std::is_same<pointer, _Ptr>::value
+ && !std::is_pointer<_Ptr>::value>
+ { };
+
+ 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)
+ {
+ _Base_type::construct(__a, std::addressof(*__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)
+ { _Base_type::destroy(__a, std::addressof(*__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 __allocator_always_compares_equal<_Alloc>::value; }
+
+ static constexpr bool _S_nothrow_move()
+ { return _S_propagate_on_move_assign() || _S_always_equal(); }
+
+ static constexpr bool _S_nothrow_swap()
+ {
+ using std::swap;
+ return !_S_propagate_on_swap()
+ || noexcept(swap(std::declval<_Alloc&>(), std::declval<_Alloc&>()));
+ }
+
+ 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;
+
+ 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
+
+#endif
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