29#ifndef _SCOPED_ALLOCATOR
30#define _SCOPED_ALLOCATOR 1
32#pragma GCC system_header
34#if __cplusplus < 201103L
41#include <bits/uses_allocator.h>
42#if __cplusplus > 201703L
46#define __glibcxx_want_allocator_traits_is_always_equal
49namespace std _GLIBCXX_VISIBILITY(default)
51_GLIBCXX_BEGIN_NAMESPACE_VERSION
58 template<
typename _OuterAlloc,
typename... _InnerAllocs>
59 class scoped_allocator_adaptor;
63 template<
typename _Alloc>
64 using __outer_allocator_t
65 =
decltype(std::declval<_Alloc>().outer_allocator());
67 template<
typename _Alloc,
typename =
void>
68 struct __outermost_type
71 static type& _S_outermost(_Alloc& __a)
noexcept {
return __a; }
74 template<
typename _Alloc>
75 struct __outermost_type<_Alloc, __void_t<__outer_allocator_t<_Alloc>>>
77 typename remove_reference<__outer_allocator_t<_Alloc>>::type
80 using __base = __outermost_type<
81 typename remove_reference<__outer_allocator_t<_Alloc>>::type
84 static typename __base::type&
85 _S_outermost(_Alloc& __a)
noexcept
86 {
return __base::_S_outermost(__a.outer_allocator()); }
90 template<
typename _Alloc>
91 inline typename __outermost_type<_Alloc>::type&
92 __outermost(_Alloc& __a)
93 {
return __outermost_type<_Alloc>::_S_outermost(__a); }
96 struct __inner_type_impl;
98 template<
typename _Outer>
99 struct __inner_type_impl<_Outer>
101 typedef scoped_allocator_adaptor<_Outer> __type;
103 __inner_type_impl() =
default;
104 __inner_type_impl(
const __inner_type_impl&) =
default;
105 __inner_type_impl(__inner_type_impl&&) =
default;
106 __inner_type_impl& operator=(
const __inner_type_impl&) =
default;
107 __inner_type_impl& operator=(__inner_type_impl&&) =
default;
109 template<
typename _Alloc>
110 __inner_type_impl(
const __inner_type_impl<_Alloc>&)
noexcept
113 template<
typename _Alloc>
114 __inner_type_impl(__inner_type_impl<_Alloc>&&) noexcept
118 _M_get(__type* __p)
noexcept {
return *__p; }
121 _M_get(
const __type* __p)
const noexcept {
return *__p; }
124 _M_tie() const noexcept {
return tuple<>(); }
127 operator==(
const __inner_type_impl&)
const noexcept
131 template<
typename _Outer,
typename _InnerHead,
typename... _InnerTail>
132 struct __inner_type_impl<_Outer, _InnerHead, _InnerTail...>
134 typedef scoped_allocator_adaptor<_InnerHead, _InnerTail...> __type;
136 __inner_type_impl() =
default;
137 __inner_type_impl(
const __inner_type_impl&) =
default;
138 __inner_type_impl(__inner_type_impl&&) =
default;
139 __inner_type_impl& operator=(
const __inner_type_impl&) =
default;
140 __inner_type_impl& operator=(__inner_type_impl&&) =
default;
142 template<
typename... _Allocs>
143 __inner_type_impl(
const __inner_type_impl<_Allocs...>& __other) noexcept
144 : _M_inner(__other._M_inner) { }
146 template<
typename... _Allocs>
147 __inner_type_impl(__inner_type_impl<_Allocs...>&& __other) noexcept
148 : _M_inner(
std::move(__other._M_inner)) { }
150 template<
typename... _Args>
152 __inner_type_impl(_Args&&... __args) noexcept
153 : _M_inner(std::forward<_Args>(__args)...) { }
156 _M_get(
void*)
noexcept {
return _M_inner; }
159 _M_get(
const void*)
const noexcept {
return _M_inner; }
161 tuple<
const _InnerHead&,
const _InnerTail&...>
162 _M_tie() const noexcept
163 {
return _M_inner._M_tie(); }
166 operator==(
const __inner_type_impl& __other)
const noexcept
167 {
return _M_inner == __other._M_inner; }
170 template<
typename...>
friend struct __inner_type_impl;
171 template<
typename,
typename...>
friend class scoped_allocator_adaptor;
179 template<
typename _OuterAlloc,
typename... _InnerAllocs>
185 typedef __inner_type_impl<_OuterAlloc, _InnerAllocs...> __inner_type;
186 __inner_type _M_inner;
188 template<
typename _Outer,
typename... _Inner>
191 template<
typename...>
192 friend struct __inner_type_impl;
194 tuple<
const _OuterAlloc&,
const _InnerAllocs&...>
195 _M_tie()
const noexcept
198 template<
typename _Alloc>
202#if ! __glibcxx_make_obj_using_allocator
203 template<
typename _Tp,
typename... _Args>
205 _M_construct(__uses_alloc0, _Tp* __p, _Args&&... __args)
208 _O_traits::construct(__outermost(*
this), __p,
209 std::forward<_Args>(__args)...);
212 typedef __uses_alloc1<typename __inner_type::__type> __uses_alloc1_;
213 typedef __uses_alloc2<typename __inner_type::__type> __uses_alloc2_;
215 template<
typename _Tp,
typename... _Args>
217 _M_construct(__uses_alloc1_, _Tp* __p, _Args&&... __args)
220 _O_traits::construct(__outermost(*
this), __p,
221 allocator_arg, inner_allocator(),
222 std::forward<_Args>(__args)...);
225 template<
typename _Tp,
typename... _Args>
227 _M_construct(__uses_alloc2_, _Tp* __p, _Args&&... __args)
230 _O_traits::construct(__outermost(*
this), __p,
231 std::forward<_Args>(__args)...,
236 template<
typename _Alloc>
238 _S_select_on_copy(
const _Alloc& __a)
241 return __a_traits::select_on_container_copy_construction(__a);
244 template<std::size_t... _Indices>
246 const _InnerAllocs&...> __refs,
247 _Index_tuple<_Indices...>)
248 : _OuterAlloc(_S_select_on_copy(std::get<0>(__refs))),
249 _M_inner(_S_select_on_copy(std::get<_Indices+1>(__refs))...)
253 template<
typename _Alloc>
254 using _Constructible =
typename enable_if<
260 template<
typename _Tp>
261 struct __not_pair {
using type = void; };
263 template<
typename _Tp,
typename _Up>
264 struct __not_pair<
pair<_Tp, _Up>> { };
267 typedef _OuterAlloc outer_allocator_type;
268 typedef typename __inner_type::__type inner_allocator_type;
278 typedef typename __or_<
281 propagate_on_container_copy_assignment...>::type
282 propagate_on_container_copy_assignment;
284 typedef typename __or_<
287 propagate_on_container_move_assignment...>::type
288 propagate_on_container_move_assignment;
290 typedef typename __or_<
293 propagate_on_container_swap...>::type
294 propagate_on_container_swap;
296 typedef typename __and_<
305 typename __traits::template rebind_alloc<_Tp>,
306 _InnerAllocs...> other;
311 template<
typename _Outer2,
typename = _Constructible<_Outer2>>
313 const _InnerAllocs&... __inner) noexcept
314 : _OuterAlloc(std::forward<_Outer2>(__outer)),
319 : _OuterAlloc(__other.outer_allocator()),
320 _M_inner(__other._M_inner)
324 : _OuterAlloc(
std::move(__other.outer_allocator())),
328 template<
typename _Outer2,
typename = _Constructible<const _Outer2&>>
332 : _OuterAlloc(__other.outer_allocator()),
333 _M_inner(__other._M_inner)
336 template<
typename _Outer2,
typename = _Constructible<_Outer2>>
339 : _OuterAlloc(
std::move(__other.outer_allocator())),
349 inner_allocator_type&
350 inner_allocator()
noexcept
351 {
return _M_inner._M_get(
this); }
353 const inner_allocator_type&
354 inner_allocator()
const noexcept
355 {
return _M_inner._M_get(
this); }
357 outer_allocator_type&
358 outer_allocator()
noexcept
359 {
return static_cast<_OuterAlloc&
>(*this); }
361 const outer_allocator_type&
362 outer_allocator()
const noexcept
363 {
return static_cast<const _OuterAlloc&
>(*this); }
365 _GLIBCXX_NODISCARD pointer
366 allocate(size_type __n)
369 _GLIBCXX_NODISCARD pointer
370 allocate(size_type __n, const_void_pointer __hint)
373 void deallocate(pointer __p, size_type __n)
noexcept
376 size_type max_size()
const
379#if ! __glibcxx_make_obj_using_allocator
380 template<
typename _Tp,
typename... _Args>
381 typename __not_pair<_Tp>::type
382 construct(_Tp* __p, _Args&&... __args)
384 auto& __inner = inner_allocator();
386 = std::__use_alloc<_Tp, inner_allocator_type, _Args...>(__inner);
387 _M_construct(__use_tag, __p, std::forward<_Args>(__args)...);
390 template<
typename _T1,
typename _T2,
typename... _Args1,
398 auto& __inner = inner_allocator();
400 = std::__use_alloc<_T1, inner_allocator_type, _Args1...>(__inner);
402 = std::__use_alloc<_T2, inner_allocator_type, _Args2...>(__inner);
403 typename _Build_index_tuple<
sizeof...(_Args1)>::__type __x_indices;
404 typename _Build_index_tuple<
sizeof...(_Args2)>::__type __y_indices;
407 _M_construct_p(__x_use_tag, __x_indices, __x),
408 _M_construct_p(__y_use_tag, __y_indices, __y));
411 template<
typename _T1,
typename _T2>
416 template<
typename _T1,
typename _T2,
typename _Up,
typename _Vp>
425 template<
typename _T1,
typename _T2,
typename _Up,
typename _Vp>
434 template<
typename _T1,
typename _T2,
typename _Up,
typename _Vp>
443 template<
typename _Tp,
typename... _Args>
444 __attribute__((__nonnull__))
446 construct(_Tp* __p, _Args&&... __args)
449 std::apply([__p,
this](
auto&&... __newargs) {
450 _O_traits::construct(__outermost(*
this), __p,
453 uses_allocator_construction_args<_Tp>(inner_allocator(),
454 std::forward<_Args>(__args)...));
458 template<
typename _Tp>
459 void destroy(_Tp* __p)
462 _O_traits::destroy(__outermost(*
this), __p);
466 select_on_container_copy_construction()
const
468 typedef typename _Build_index_tuple<
sizeof...(_InnerAllocs)>::__type
473 template <
typename _OutA1,
typename _OutA2,
typename... _InA>
479#if ! __glibcxx_make_obj_using_allocator
480 template<
typename _Ind,
typename... _Args>
485 template<
size_t... _Ind,
typename... _Args>
486 tuple<allocator_arg_t, inner_allocator_type&, _Args&&...>
487 _M_construct_p(__uses_alloc1_, _Index_tuple<_Ind...>,
490 return { allocator_arg, inner_allocator(),
495 template<
size_t... _Ind,
typename... _Args>
496 tuple<_Args&&..., inner_allocator_type&>
497 _M_construct_p(__uses_alloc2_, _Index_tuple<_Ind...>,
500 return { std::get<_Ind>(
std::move(__t))..., inner_allocator() };
506 template <
typename _OutA1,
typename _OutA2,
typename... _InA>
511 return __a.outer_allocator() == __b.outer_allocator()
512 && __a._M_inner == __b._M_inner;
515#if __cpp_impl_three_way_comparison < 201907L
517 template <
typename _OutA1,
typename _OutA2,
typename... _InA>
519 operator!=(
const scoped_allocator_adaptor<_OutA1, _InA...>& __a,
520 const scoped_allocator_adaptor<_OutA2, _InA...>& __b)
noexcept
521 {
return !(__a == __b); }
526_GLIBCXX_END_NAMESPACE_VERSION
constexpr auto tuple_cat(_Tpls &&... __tpls) -> typename __tuple_cat_result< _Tpls... >::__type
Create a tuple containing all elements from multiple tuple-like objects.
constexpr tuple< _Elements &&... > forward_as_tuple(_Elements &&... __args) noexcept
Create a tuple of lvalue or rvalue references to the arguments.
constexpr std::remove_reference< _Tp >::type && move(_Tp &&__t) noexcept
Convert a value to an rvalue.
constexpr piecewise_construct_t piecewise_construct
Tag for piecewise construction of std::pair objects.
constexpr tuple< _Elements &... > tie(_Elements &... __args) noexcept
Return a tuple of lvalue references bound to the arguments.
constexpr _Tp && forward(typename std::remove_reference< _Tp >::type &__t) noexcept
Forward an lvalue.
ISO C++ entities toplevel namespace is std.
constexpr _Iterator __base(_Iterator __it)
An adaptor to recursively pass an allocator to the objects it constructs.
Primary class template, tuple.
Define a member typedef type only if a boolean constant is true.
Uniform interface to all allocator types.
__detected_or_t< false_type, __pocma, _Alloc > propagate_on_container_move_assignment
How the allocator is propagated on move assignment.
typename _Ptr< __v_pointer, void >::type void_pointer
The allocator's void pointer type.
__detected_or_t< value_type *, __pointer, _Alloc > pointer
The allocator's pointer type.
static constexpr pointer allocate(_Alloc &__a, size_type __n)
Allocate memory.
typename _Size< _Alloc, difference_type >::type size_type
The allocator's size type.
typename _Ptr< __cv_pointer, const void >::type const_void_pointer
The allocator's const void pointer type.
typename _Diff< _Alloc, pointer >::type difference_type
The allocator's difference type.
typename _Ptr< __c_pointer, const value_type >::type const_pointer
The allocator's const pointer type.
_Alloc::value_type value_type
The allocated type.
static constexpr void deallocate(_Alloc &__a, pointer __p, size_type __n)
Deallocate memory.
typename __detected_or_t< is_empty< _Alloc >, __equal, _Alloc >::type is_always_equal
Whether all instances of the allocator type compare equal.
static constexpr size_type max_size(const _Alloc &__a) noexcept
The maximum supported allocation size.
__detected_or_t< false_type, __pocca, _Alloc > propagate_on_container_copy_assignment
How the allocator is propagated on copy assignment.
__detected_or_t< false_type, __pocs, _Alloc > propagate_on_container_swap
How the allocator is propagated on swap.
Struct holding two objects of arbitrary type.
_T1 first
The first member.
_T2 second
The second member.
Tag type for piecewise construction of std::pair objects.