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
46namespace std _GLIBCXX_VISIBILITY(default)
48_GLIBCXX_BEGIN_NAMESPACE_VERSION
55 template<
typename _OuterAlloc,
typename... _InnerAllocs>
56 class scoped_allocator_adaptor;
60 template<
typename _Alloc>
61 using __outer_allocator_t
62 =
decltype(std::declval<_Alloc>().outer_allocator());
64 template<
typename _Alloc,
typename =
void>
65 struct __outermost_type
68 static type& _S_outermost(_Alloc& __a) {
return __a; }
71 template<
typename _Alloc>
72 struct __outermost_type<_Alloc, __void_t<__outer_allocator_t<_Alloc>>>
74 typename remove_reference<__outer_allocator_t<_Alloc>>::type
77 using __base = __outermost_type<
78 typename remove_reference<__outer_allocator_t<_Alloc>>::type
81 static typename __base::type&
82 _S_outermost(_Alloc& __a)
83 {
return __base::_S_outermost(__a.outer_allocator()); }
87 template<
typename _Alloc>
88 inline typename __outermost_type<_Alloc>::type&
89 __outermost(_Alloc& __a)
90 {
return __outermost_type<_Alloc>::_S_outermost(__a); }
93 struct __inner_type_impl;
95 template<
typename _Outer>
96 struct __inner_type_impl<_Outer>
98 typedef scoped_allocator_adaptor<_Outer> __type;
100 __inner_type_impl() =
default;
101 __inner_type_impl(
const __inner_type_impl&) =
default;
102 __inner_type_impl(__inner_type_impl&&) =
default;
103 __inner_type_impl& operator=(
const __inner_type_impl&) =
default;
104 __inner_type_impl& operator=(__inner_type_impl&&) =
default;
106 template<
typename _Alloc>
107 __inner_type_impl(
const __inner_type_impl<_Alloc>& __other)
110 template<
typename _Alloc>
111 __inner_type_impl(__inner_type_impl<_Alloc>&& __other)
115 _M_get(__type* __p)
noexcept {
return *__p; }
118 _M_get(
const __type* __p)
const noexcept {
return *__p; }
121 _M_tie() const noexcept {
return tuple<>(); }
124 operator==(
const __inner_type_impl&)
const noexcept
128 template<
typename _Outer,
typename _InnerHead,
typename... _InnerTail>
129 struct __inner_type_impl<_Outer, _InnerHead, _InnerTail...>
131 typedef scoped_allocator_adaptor<_InnerHead, _InnerTail...> __type;
133 __inner_type_impl() =
default;
134 __inner_type_impl(
const __inner_type_impl&) =
default;
135 __inner_type_impl(__inner_type_impl&&) =
default;
136 __inner_type_impl& operator=(
const __inner_type_impl&) =
default;
137 __inner_type_impl& operator=(__inner_type_impl&&) =
default;
139 template<
typename... _Allocs>
140 __inner_type_impl(
const __inner_type_impl<_Allocs...>& __other)
141 : _M_inner(__other._M_inner) { }
143 template<
typename... _Allocs>
144 __inner_type_impl(__inner_type_impl<_Allocs...>&& __other)
145 : _M_inner(
std::
move(__other._M_inner)) { }
147 template<
typename... _Args>
149 __inner_type_impl(_Args&&... __args)
150 : _M_inner(
std::
forward<_Args>(__args)...) { }
153 _M_get(
void*)
noexcept {
return _M_inner; }
156 _M_get(
const void*)
const noexcept {
return _M_inner; }
158 tuple<
const _InnerHead&,
const _InnerTail&...>
159 _M_tie() const noexcept
160 {
return _M_inner._M_tie(); }
163 operator==(
const __inner_type_impl& __other)
const noexcept
164 {
return _M_inner == __other._M_inner; }
167 template<
typename...>
friend class __inner_type_impl;
168 template<
typename,
typename...>
friend class scoped_allocator_adaptor;
176 template<
typename _OuterAlloc,
typename... _InnerAllocs>
182 typedef __inner_type_impl<_OuterAlloc, _InnerAllocs...> __inner_type;
183 __inner_type _M_inner;
185 template<
typename _Outer,
typename... _Inner>
188 template<
typename...>
189 friend class __inner_type_impl;
191 tuple<
const _OuterAlloc&,
const _InnerAllocs&...>
192 _M_tie()
const noexcept
195 template<
typename _Alloc>
199#if ! __cpp_lib_make_obj_using_allocator
200 template<
typename _Tp,
typename... _Args>
202 _M_construct(__uses_alloc0, _Tp* __p, _Args&&... __args)
205 _O_traits::construct(__outermost(*
this), __p,
206 std::forward<_Args>(__args)...);
209 typedef __uses_alloc1<typename __inner_type::__type> __uses_alloc1_;
210 typedef __uses_alloc2<typename __inner_type::__type> __uses_alloc2_;
212 template<
typename _Tp,
typename... _Args>
214 _M_construct(__uses_alloc1_, _Tp* __p, _Args&&... __args)
217 _O_traits::construct(__outermost(*
this), __p,
218 allocator_arg, inner_allocator(),
219 std::forward<_Args>(__args)...);
222 template<
typename _Tp,
typename... _Args>
224 _M_construct(__uses_alloc2_, _Tp* __p, _Args&&... __args)
227 _O_traits::construct(__outermost(*
this), __p,
228 std::forward<_Args>(__args)...,
233 template<
typename _Alloc>
235 _S_select_on_copy(
const _Alloc& __a)
238 return __a_traits::select_on_container_copy_construction(__a);
241 template<std::size_t... _Indices>
243 const _InnerAllocs&...> __refs,
244 _Index_tuple<_Indices...>)
245 : _OuterAlloc(_S_select_on_copy(std::get<0>(__refs))),
246 _M_inner(_S_select_on_copy(std::get<_Indices+1>(__refs))...)
250 template<
typename _Alloc>
251 using _Constructible =
typename enable_if<
257 template<
typename _Tp>
258 struct __not_pair {
using type = void; };
260 template<
typename _Tp,
typename _Up>
261 struct __not_pair<
pair<_Tp, _Up>> { };
264 typedef _OuterAlloc outer_allocator_type;
265 typedef typename __inner_type::__type inner_allocator_type;
275 typedef typename __or_<
278 propagate_on_container_copy_assignment...>::type
279 propagate_on_container_copy_assignment;
281 typedef typename __or_<
284 propagate_on_container_move_assignment...>::type
285 propagate_on_container_move_assignment;
287 typedef typename __or_<
290 propagate_on_container_swap...>::type
291 propagate_on_container_swap;
293 typedef typename __and_<
302 typename __traits::template rebind_alloc<_Tp>,
303 _InnerAllocs...> other;
308 template<
typename _Outer2,
typename = _Constructible<_Outer2>>
310 const _InnerAllocs&... __inner)
311 : _OuterAlloc(std::forward<_Outer2>(__outer)),
316 : _OuterAlloc(__other.outer_allocator()),
317 _M_inner(__other._M_inner)
321 : _OuterAlloc(
std::move(__other.outer_allocator())),
325 template<
typename _Outer2,
typename = _Constructible<const _Outer2&>>
328 : _OuterAlloc(__other.outer_allocator()),
329 _M_inner(__other._M_inner)
332 template<
typename _Outer2,
typename = _Constructible<_Outer2>>
335 : _OuterAlloc(
std::move(__other.outer_allocator())),
345 inner_allocator_type& inner_allocator()
noexcept
346 {
return _M_inner._M_get(
this); }
348 const inner_allocator_type& inner_allocator()
const noexcept
349 {
return _M_inner._M_get(
this); }
351 outer_allocator_type& outer_allocator()
noexcept
352 {
return static_cast<_OuterAlloc&
>(*this); }
354 const outer_allocator_type& outer_allocator()
const noexcept
355 {
return static_cast<const _OuterAlloc&
>(*this); }
357 _GLIBCXX_NODISCARD pointer allocate(size_type __n)
360 _GLIBCXX_NODISCARD pointer allocate(size_type __n, const_void_pointer __hint)
363 void deallocate(pointer __p, size_type __n)
366 size_type max_size()
const
369#if ! __cpp_lib_make_obj_using_allocator
370 template<
typename _Tp,
typename... _Args>
371 typename __not_pair<_Tp>::type
372 construct(_Tp* __p, _Args&&... __args)
374 auto& __inner = inner_allocator();
376 = std::__use_alloc<_Tp, inner_allocator_type, _Args...>(__inner);
377 _M_construct(__use_tag, __p, std::forward<_Args>(__args)...);
380 template<
typename _T1,
typename _T2,
typename... _Args1,
388 auto& __inner = inner_allocator();
390 = std::__use_alloc<_T1, inner_allocator_type, _Args1...>(__inner);
392 = std::__use_alloc<_T2, inner_allocator_type, _Args2...>(__inner);
393 typename _Build_index_tuple<
sizeof...(_Args1)>::__type __x_indices;
394 typename _Build_index_tuple<
sizeof...(_Args2)>::__type __y_indices;
397 _M_construct_p(__x_use_tag, __x_indices, __x),
398 _M_construct_p(__y_use_tag, __y_indices, __y));
401 template<
typename _T1,
typename _T2>
406 template<
typename _T1,
typename _T2,
typename _Up,
typename _Vp>
415 template<
typename _T1,
typename _T2,
typename _Up,
typename _Vp>
424 template<
typename _T1,
typename _T2,
typename _Up,
typename _Vp>
433 template<
typename _Tp,
typename... _Args>
434 __attribute__((__nonnull__))
436 construct(_Tp* __p, _Args&&... __args)
439 std::apply([__p,
this](
auto&&... __newargs) {
440 _O_traits::construct(__outermost(*
this), __p,
443 uses_allocator_construction_args<_Tp>(inner_allocator(),
444 std::forward<_Args>(__args)...));
448 template<
typename _Tp>
449 void destroy(_Tp* __p)
452 _O_traits::destroy(__outermost(*
this), __p);
456 select_on_container_copy_construction()
const
458 typedef typename _Build_index_tuple<
sizeof...(_InnerAllocs)>::__type
463 template <
typename _OutA1,
typename _OutA2,
typename... _InA>
469#if ! __cpp_lib_make_obj_using_allocator
470 template<
typename _Ind,
typename... _Args>
475 template<
size_t... _Ind,
typename... _Args>
476 tuple<allocator_arg_t, inner_allocator_type&, _Args&&...>
477 _M_construct_p(__uses_alloc1_, _Index_tuple<_Ind...>,
480 return { allocator_arg, inner_allocator(),
485 template<
size_t... _Ind,
typename... _Args>
486 tuple<_Args&&..., inner_allocator_type&>
487 _M_construct_p(__uses_alloc2_, _Index_tuple<_Ind...>,
490 return { std::get<_Ind>(
std::move(__t))..., inner_allocator() };
496 template <
typename _OutA1,
typename _OutA2,
typename... _InA>
501 return __a.outer_allocator() == __b.outer_allocator()
502 && __a._M_inner == __b._M_inner;
505#if __cpp_impl_three_way_comparison < 201907L
507 template <
typename _OutA1,
typename _OutA2,
typename... _InA>
509 operator!=(
const scoped_allocator_adaptor<_OutA1, _InA...>& __a,
510 const scoped_allocator_adaptor<_OutA2, _InA...>& __b)
noexcept
511 {
return !(__a == __b); }
516_GLIBCXX_END_NAMESPACE_VERSION
constexpr auto tuple_cat(_Tpls &&... __tpls) -> typename __tuple_cat_result< _Tpls... >::__type
tuple_cat
constexpr tuple< _Elements &&... > forward_as_tuple(_Elements &&... __args) noexcept
std::forward_as_tuple
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
tie
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.