2 //===----------------------------------------------------------------------===//
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
8 //===----------------------------------------------------------------------===//
10 #ifndef _LIBCPP_SCOPED_ALLOCATOR
11 #define _LIBCPP_SCOPED_ALLOCATOR
14 scoped_allocator synopsis
19 template <class OuterAlloc, class... InnerAllocs>
20 class scoped_allocator_adaptor : public OuterAlloc
22 typedef allocator_traits<OuterAlloc> OuterTraits; // exposition only
23 scoped_allocator_adaptor<InnerAllocs...> inner; // exposition only
26 typedef OuterAlloc outer_allocator_type;
27 typedef see below inner_allocator_type;
29 typedef typename OuterTraits::value_type value_type;
30 typedef typename OuterTraits::size_type size_type;
31 typedef typename OuterTraits::difference_type difference_type;
32 typedef typename OuterTraits::pointer pointer;
33 typedef typename OuterTraits::const_pointer const_pointer;
34 typedef typename OuterTraits::void_pointer void_pointer;
35 typedef typename OuterTraits::const_void_pointer const_void_pointer;
37 typedef see below propagate_on_container_copy_assignment;
38 typedef see below propagate_on_container_move_assignment;
39 typedef see below propagate_on_container_swap;
40 typedef see below is_always_equal;
45 typedef scoped_allocator_adaptor<
46 OuterTraits::template rebind_alloc<Tp>, InnerAllocs...> other;
49 scoped_allocator_adaptor();
50 template <class OuterA2>
51 scoped_allocator_adaptor(OuterA2&& outerAlloc,
52 const InnerAllocs&... innerAllocs) noexcept;
53 scoped_allocator_adaptor(const scoped_allocator_adaptor& other) noexcept;
54 scoped_allocator_adaptor(scoped_allocator_adaptor&& other) noexcept;
55 template <class OuterA2>
56 scoped_allocator_adaptor(const scoped_allocator_adaptor<OuterA2, InnerAllocs...>& other) noexcept;
57 template <class OuterA2>
58 scoped_allocator_adaptor(const scoped_allocator_adaptor<OuterA2, InnerAllocs...>&& other) noexcept;
60 scoped_allocator_adaptor& operator=(const scoped_allocator_adaptor&) = default;
61 scoped_allocator_adaptor& operator=(scoped_allocator_adaptor&&) = default;
62 ~scoped_allocator_adaptor();
64 inner_allocator_type& inner_allocator() noexcept;
65 const inner_allocator_type& inner_allocator() const noexcept;
67 outer_allocator_type& outer_allocator() noexcept;
68 const outer_allocator_type& outer_allocator() const noexcept;
70 pointer allocate(size_type n); // [[nodiscard]] in C++20
71 pointer allocate(size_type n, const_void_pointer hint); // [[nodiscard]] in C++20
72 void deallocate(pointer p, size_type n) noexcept;
74 size_type max_size() const;
75 template <class T, class... Args> void construct(T* p, Args&& args);
76 template <class T1, class T2, class... Args1, class... Args2>
77 void construct(pair<T1, T2>* p, piecewise_construct t, tuple<Args1...> x,
79 template <class T1, class T2>
80 void construct(pair<T1, T2>* p);
81 template <class T1, class T2, class U, class V>
82 void construct(pair<T1, T2>* p, U&& x, V&& y);
83 template <class T1, class T2, class U, class V>
84 void construct(pair<T1, T2>* p, const pair<U, V>& x);
85 template <class T1, class T2, class U, class V>
86 void construct(pair<T1, T2>* p, pair<U, V>&& x);
87 template <class T> void destroy(T* p);
89 template <class T> void destroy(T* p) noexcept;
91 scoped_allocator_adaptor select_on_container_copy_construction() const noexcept;
94 template<class OuterAlloc, class... InnerAllocs>
95 scoped_allocator_adaptor(OuterAlloc, InnerAllocs...)
96 -> scoped_allocator_adaptor<OuterAlloc, InnerAllocs...>;
98 template <class OuterA1, class OuterA2, class... InnerAllocs>
100 operator==(const scoped_allocator_adaptor<OuterA1, InnerAllocs...>& a,
101 const scoped_allocator_adaptor<OuterA2, InnerAllocs...>& b) noexcept;
103 template <class OuterA1, class OuterA2, class... InnerAllocs>
105 operator!=(const scoped_allocator_adaptor<OuterA1, InnerAllocs...>& a,
106 const scoped_allocator_adaptor<OuterA2, InnerAllocs...>& b) noexcept; // removed in C++20
112 #if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
113 # include <__cxx03/scoped_allocator>
116 # include <__memory/allocator_traits.h>
117 # include <__memory/uses_allocator_construction.h>
118 # include <__type_traits/common_type.h>
119 # include <__type_traits/enable_if.h>
120 # include <__type_traits/integral_constant.h>
121 # include <__type_traits/is_constructible.h>
122 # include <__type_traits/remove_reference.h>
123 # include <__utility/declval.h>
124 # include <__utility/forward.h>
125 # include <__utility/move.h>
126 # include <__utility/pair.h>
127 # include <__utility/piecewise_construct.h>
131 # if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
132 # pragma GCC system_header
136 # include <__undef_macros>
138 _LIBCPP_BEGIN_NAMESPACE_STD
140 # if !defined(_LIBCPP_CXX03_LANG)
142 // scoped_allocator_adaptor
144 template <class... _Allocs>
145 class scoped_allocator_adaptor;
147 template <class... _Allocs>
148 struct __get_poc_copy_assignment;
151 struct __get_poc_copy_assignment<_A0> {
152 static const bool value = allocator_traits<_A0>::propagate_on_container_copy_assignment::value;
155 template <class _A0, class... _Allocs>
156 struct __get_poc_copy_assignment<_A0, _Allocs...> {
157 static const bool value = allocator_traits<_A0>::propagate_on_container_copy_assignment::value ||
158 __get_poc_copy_assignment<_Allocs...>::value;
161 template <class... _Allocs>
162 struct __get_poc_move_assignment;
165 struct __get_poc_move_assignment<_A0> {
166 static const bool value = allocator_traits<_A0>::propagate_on_container_move_assignment::value;
169 template <class _A0, class... _Allocs>
170 struct __get_poc_move_assignment<_A0, _Allocs...> {
171 static const bool value = allocator_traits<_A0>::propagate_on_container_move_assignment::value ||
172 __get_poc_move_assignment<_Allocs...>::value;
175 template <class... _Allocs>
176 struct __get_poc_swap;
179 struct __get_poc_swap<_A0> {
180 static const bool value = allocator_traits<_A0>::propagate_on_container_swap::value;
183 template <class _A0, class... _Allocs>
184 struct __get_poc_swap<_A0, _Allocs...> {
185 static const bool value =
186 allocator_traits<_A0>::propagate_on_container_swap::value || __get_poc_swap<_Allocs...>::value;
189 template <class... _Allocs>
190 struct __get_is_always_equal;
193 struct __get_is_always_equal<_A0> {
194 static const bool value = allocator_traits<_A0>::is_always_equal::value;
197 template <class _A0, class... _Allocs>
198 struct __get_is_always_equal<_A0, _Allocs...> {
199 static const bool value = allocator_traits<_A0>::is_always_equal::value && __get_is_always_equal<_Allocs...>::value;
202 template <class... _Allocs>
203 class __scoped_allocator_storage;
205 template <class _OuterAlloc, class... _InnerAllocs>
206 class __scoped_allocator_storage<_OuterAlloc, _InnerAllocs...> : public _OuterAlloc {
207 typedef _OuterAlloc outer_allocator_type;
210 typedef scoped_allocator_adaptor<_InnerAllocs...> inner_allocator_type;
213 inner_allocator_type __inner_;
216 _LIBCPP_HIDE_FROM_ABI __scoped_allocator_storage() _NOEXCEPT {}
218 template <class _OuterA2, __enable_if_t<is_constructible<outer_allocator_type, _OuterA2>::value, int> = 0>
219 _LIBCPP_HIDE_FROM_ABI
220 __scoped_allocator_storage(_OuterA2&& __outer_alloc, const _InnerAllocs&... __inner_allocs) _NOEXCEPT
221 : outer_allocator_type(std::forward<_OuterA2>(__outer_alloc)),
222 __inner_(__inner_allocs...) {}
224 template <class _OuterA2, __enable_if_t<is_constructible<outer_allocator_type, const _OuterA2&>::value, int> = 0>
225 _LIBCPP_HIDE_FROM_ABI
226 __scoped_allocator_storage(const __scoped_allocator_storage<_OuterA2, _InnerAllocs...>& __other) _NOEXCEPT
227 : outer_allocator_type(__other.outer_allocator()),
228 __inner_(__other.inner_allocator()) {}
230 template <class _OuterA2, __enable_if_t<is_constructible<outer_allocator_type, _OuterA2>::value, int> = 0>
231 _LIBCPP_HIDE_FROM_ABI
232 __scoped_allocator_storage(__scoped_allocator_storage<_OuterA2, _InnerAllocs...>&& __other) _NOEXCEPT
233 : outer_allocator_type(std::move(__other.outer_allocator())),
234 __inner_(std::move(__other.inner_allocator())) {}
236 template <class _OuterA2, __enable_if_t<is_constructible<outer_allocator_type, _OuterA2>::value, int> = 0>
237 _LIBCPP_HIDE_FROM_ABI __scoped_allocator_storage(_OuterA2&& __o, const inner_allocator_type& __i) _NOEXCEPT
238 : outer_allocator_type(std::forward<_OuterA2>(__o)),
241 _LIBCPP_HIDE_FROM_ABI inner_allocator_type& inner_allocator() _NOEXCEPT { return __inner_; }
242 _LIBCPP_HIDE_FROM_ABI const inner_allocator_type& inner_allocator() const _NOEXCEPT { return __inner_; }
244 _LIBCPP_HIDE_FROM_ABI outer_allocator_type& outer_allocator() _NOEXCEPT {
245 return static_cast<outer_allocator_type&>(*this);
247 _LIBCPP_HIDE_FROM_ABI const outer_allocator_type& outer_allocator() const _NOEXCEPT {
248 return static_cast<const outer_allocator_type&>(*this);
251 scoped_allocator_adaptor<outer_allocator_type, _InnerAllocs...> _LIBCPP_HIDE_FROM_ABI
252 select_on_container_copy_construction() const _NOEXCEPT {
253 return scoped_allocator_adaptor<outer_allocator_type, _InnerAllocs...>(
254 allocator_traits<outer_allocator_type>::select_on_container_copy_construction(outer_allocator()),
255 allocator_traits<inner_allocator_type>::select_on_container_copy_construction(inner_allocator()));
259 friend class __scoped_allocator_storage;
262 template <class _OuterAlloc>
263 class __scoped_allocator_storage<_OuterAlloc> : public _OuterAlloc {
264 typedef _OuterAlloc outer_allocator_type;
267 typedef scoped_allocator_adaptor<_OuterAlloc> inner_allocator_type;
269 _LIBCPP_HIDE_FROM_ABI __scoped_allocator_storage() _NOEXCEPT {}
271 template <class _OuterA2, __enable_if_t<is_constructible<outer_allocator_type, _OuterA2>::value, int> = 0>
272 _LIBCPP_HIDE_FROM_ABI __scoped_allocator_storage(_OuterA2&& __outer_alloc) _NOEXCEPT
273 : outer_allocator_type(std::forward<_OuterA2>(__outer_alloc)) {}
275 template <class _OuterA2, __enable_if_t<is_constructible<outer_allocator_type, const _OuterA2&>::value, int> = 0>
276 _LIBCPP_HIDE_FROM_ABI __scoped_allocator_storage(const __scoped_allocator_storage<_OuterA2>& __other) _NOEXCEPT
277 : outer_allocator_type(__other.outer_allocator()) {}
279 template <class _OuterA2, __enable_if_t<is_constructible<outer_allocator_type, _OuterA2>::value, int> = 0>
280 _LIBCPP_HIDE_FROM_ABI __scoped_allocator_storage(__scoped_allocator_storage<_OuterA2>&& __other) _NOEXCEPT
281 : outer_allocator_type(std::move(__other.outer_allocator())) {}
283 _LIBCPP_HIDE_FROM_ABI inner_allocator_type& inner_allocator() _NOEXCEPT {
284 return static_cast<inner_allocator_type&>(*this);
286 _LIBCPP_HIDE_FROM_ABI const inner_allocator_type& inner_allocator() const _NOEXCEPT {
287 return static_cast<const inner_allocator_type&>(*this);
290 _LIBCPP_HIDE_FROM_ABI outer_allocator_type& outer_allocator() _NOEXCEPT {
291 return static_cast<outer_allocator_type&>(*this);
293 _LIBCPP_HIDE_FROM_ABI const outer_allocator_type& outer_allocator() const _NOEXCEPT {
294 return static_cast<const outer_allocator_type&>(*this);
297 _LIBCPP_HIDE_FROM_ABI scoped_allocator_adaptor<outer_allocator_type>
298 select_on_container_copy_construction() const _NOEXCEPT {
299 return scoped_allocator_adaptor<outer_allocator_type>(
300 allocator_traits<outer_allocator_type>::select_on_container_copy_construction(outer_allocator()));
303 __scoped_allocator_storage(const outer_allocator_type& __o, const inner_allocator_type& __i) _NOEXCEPT;
306 friend class __scoped_allocator_storage;
311 template <class _Alloc>
312 decltype(std::declval<_Alloc>().outer_allocator(), true_type()) __has_outer_allocator_test(_Alloc&& __a);
314 template <class _Alloc>
315 false_type __has_outer_allocator_test(const volatile _Alloc& __a);
317 template <class _Alloc>
318 struct __has_outer_allocator
319 : public common_type< decltype(std::__has_outer_allocator_test(std::declval<_Alloc&>()))>::type {};
321 template <class _Alloc, bool = __has_outer_allocator<_Alloc>::value>
324 _LIBCPP_HIDE_FROM_ABI type& operator()(type& __a) const _NOEXCEPT { return __a; }
327 template <class _Alloc>
328 struct __outermost<_Alloc, true> {
329 typedef __libcpp_remove_reference_t< decltype(std::declval<_Alloc>().outer_allocator()) > _OuterAlloc;
330 typedef typename __outermost<_OuterAlloc>::type type;
331 _LIBCPP_HIDE_FROM_ABI type& operator()(_Alloc& __a) const _NOEXCEPT {
332 return __outermost<_OuterAlloc>()(__a.outer_allocator());
336 template <class _OuterAlloc, class... _InnerAllocs>
337 class _LIBCPP_TEMPLATE_VIS scoped_allocator_adaptor<_OuterAlloc, _InnerAllocs...>
338 : public __scoped_allocator_storage<_OuterAlloc, _InnerAllocs...> {
339 typedef __scoped_allocator_storage<_OuterAlloc, _InnerAllocs...> _Base;
340 typedef allocator_traits<_OuterAlloc> _OuterTraits;
343 typedef _OuterAlloc outer_allocator_type;
344 typedef typename _Base::inner_allocator_type inner_allocator_type;
345 typedef typename _OuterTraits::size_type size_type;
346 typedef typename _OuterTraits::difference_type difference_type;
347 typedef typename _OuterTraits::pointer pointer;
348 typedef typename _OuterTraits::const_pointer const_pointer;
349 typedef typename _OuterTraits::void_pointer void_pointer;
350 typedef typename _OuterTraits::const_void_pointer const_void_pointer;
352 typedef integral_constant< bool, __get_poc_copy_assignment<outer_allocator_type, _InnerAllocs...>::value >
353 propagate_on_container_copy_assignment;
354 typedef integral_constant< bool, __get_poc_move_assignment<outer_allocator_type, _InnerAllocs...>::value >
355 propagate_on_container_move_assignment;
356 typedef integral_constant< bool, __get_poc_swap<outer_allocator_type, _InnerAllocs...>::value >
357 propagate_on_container_swap;
358 typedef integral_constant< bool, __get_is_always_equal<outer_allocator_type, _InnerAllocs...>::value >
363 typedef scoped_allocator_adaptor< typename _OuterTraits::template rebind_alloc<_Tp>, _InnerAllocs... > other;
366 _LIBCPP_HIDE_FROM_ABI scoped_allocator_adaptor() _NOEXCEPT {}
367 template <class _OuterA2, __enable_if_t<is_constructible<outer_allocator_type, _OuterA2>::value, int> = 0>
368 _LIBCPP_HIDE_FROM_ABI
369 scoped_allocator_adaptor(_OuterA2&& __outer_alloc, const _InnerAllocs&... __inner_allocs) _NOEXCEPT
370 : _Base(std::forward<_OuterA2>(__outer_alloc), __inner_allocs...) {}
371 // scoped_allocator_adaptor(const scoped_allocator_adaptor& __other) = default;
372 template <class _OuterA2, __enable_if_t<is_constructible<outer_allocator_type, const _OuterA2&>::value, int> = 0>
373 _LIBCPP_HIDE_FROM_ABI
374 scoped_allocator_adaptor(const scoped_allocator_adaptor<_OuterA2, _InnerAllocs...>& __other) _NOEXCEPT
376 template <class _OuterA2, __enable_if_t<is_constructible<outer_allocator_type, _OuterA2>::value, int> = 0>
377 _LIBCPP_HIDE_FROM_ABI
378 scoped_allocator_adaptor(scoped_allocator_adaptor<_OuterA2, _InnerAllocs...>&& __other) _NOEXCEPT
379 : _Base(std::move(__other)) {}
381 // scoped_allocator_adaptor& operator=(const scoped_allocator_adaptor&) = default;
382 // scoped_allocator_adaptor& operator=(scoped_allocator_adaptor&&) = default;
383 // ~scoped_allocator_adaptor() = default;
385 _LIBCPP_HIDE_FROM_ABI inner_allocator_type& inner_allocator() _NOEXCEPT { return _Base::inner_allocator(); }
386 _LIBCPP_HIDE_FROM_ABI const inner_allocator_type& inner_allocator() const _NOEXCEPT {
387 return _Base::inner_allocator();
390 _LIBCPP_HIDE_FROM_ABI outer_allocator_type& outer_allocator() _NOEXCEPT { return _Base::outer_allocator(); }
391 _LIBCPP_HIDE_FROM_ABI const outer_allocator_type& outer_allocator() const _NOEXCEPT {
392 return _Base::outer_allocator();
395 [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI pointer allocate(size_type __n) {
396 return allocator_traits<outer_allocator_type>::allocate(outer_allocator(), __n);
398 [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI pointer allocate(size_type __n, const_void_pointer __hint) {
399 return allocator_traits<outer_allocator_type>::allocate(outer_allocator(), __n, __hint);
402 _LIBCPP_HIDE_FROM_ABI void deallocate(pointer __p, size_type __n) _NOEXCEPT {
403 allocator_traits<outer_allocator_type>::deallocate(outer_allocator(), __p, __n);
406 _LIBCPP_HIDE_FROM_ABI size_type max_size() const {
407 return allocator_traits<outer_allocator_type>::max_size(outer_allocator());
410 # if _LIBCPP_STD_VER >= 20
411 template <class _Type, class... _Args>
412 _LIBCPP_HIDE_FROM_ABI void construct(_Type* __ptr, _Args&&... __args) {
413 using _OM = __outermost<outer_allocator_type>;
415 [__ptr, this](auto&&... __newargs) {
416 allocator_traits<typename _OM::type>::construct(
417 _OM()(outer_allocator()), __ptr, std::forward<decltype(__newargs)>(__newargs)...);
419 std::uses_allocator_construction_args<_Type>(inner_allocator(), std::forward<_Args>(__args)...));
422 template <class _Tp, class... _Args>
423 _LIBCPP_HIDE_FROM_ABI void construct(_Tp* __p, _Args&&... __args) {
424 __construct(__uses_alloc_ctor<_Tp, inner_allocator_type&, _Args...>(), __p, std::forward<_Args>(__args)...);
427 template <class _T1, class _T2, class... _Args1, class... _Args2>
428 _LIBCPP_HIDE_FROM_ABI void
429 construct(pair<_T1, _T2>* __p, piecewise_construct_t, tuple<_Args1...> __x, tuple<_Args2...> __y) {
430 typedef __outermost<outer_allocator_type> _OM;
431 allocator_traits<typename _OM::type>::construct(
432 _OM()(outer_allocator()),
435 __transform_tuple(typename __uses_alloc_ctor< _T1, inner_allocator_type&, _Args1... >::type(),
437 typename __make_tuple_indices<sizeof...(_Args1)>::type{}),
438 __transform_tuple(typename __uses_alloc_ctor< _T2, inner_allocator_type&, _Args2... >::type(),
440 typename __make_tuple_indices<sizeof...(_Args2)>::type{}));
443 template <class _T1, class _T2>
444 _LIBCPP_HIDE_FROM_ABI void construct(pair<_T1, _T2>* __p) {
445 construct(__p, piecewise_construct, tuple<>{}, tuple<>{});
448 template <class _T1, class _T2, class _Up, class _Vp>
449 _LIBCPP_HIDE_FROM_ABI void construct(pair<_T1, _T2>* __p, _Up&& __x, _Vp&& __y) {
452 std::forward_as_tuple(std::forward<_Up>(__x)),
453 std::forward_as_tuple(std::forward<_Vp>(__y)));
456 template <class _T1, class _T2, class _Up, class _Vp>
457 _LIBCPP_HIDE_FROM_ABI void construct(pair<_T1, _T2>* __p, const pair<_Up, _Vp>& __x) {
458 construct(__p, piecewise_construct, std::forward_as_tuple(__x.first), std::forward_as_tuple(__x.second));
461 template <class _T1, class _T2, class _Up, class _Vp>
462 _LIBCPP_HIDE_FROM_ABI void construct(pair<_T1, _T2>* __p, pair<_Up, _Vp>&& __x) {
465 std::forward_as_tuple(std::forward<_Up>(__x.first)),
466 std::forward_as_tuple(std::forward<_Vp>(__x.second)));
471 _LIBCPP_HIDE_FROM_ABI void destroy(_Tp* __p) {
472 typedef __outermost<outer_allocator_type> _OM;
473 allocator_traits<typename _OM::type>::destroy(_OM()(outer_allocator()), __p);
476 _LIBCPP_HIDE_FROM_ABI scoped_allocator_adaptor select_on_container_copy_construction() const _NOEXCEPT {
477 return _Base::select_on_container_copy_construction();
481 _LIBCPP_HIDE_FROM_ABI explicit scoped_allocator_adaptor(
482 outer_allocator_type&& __o, inner_allocator_type&& __i) _NOEXCEPT : _Base(std::move(__o), std::move(__i)) {}
484 template <class _Tp, class... _Args>
485 _LIBCPP_HIDE_FROM_ABI void __construct(integral_constant<int, 0>, _Tp* __p, _Args&&... __args) {
486 typedef __outermost<outer_allocator_type> _OM;
487 allocator_traits<typename _OM::type>::construct(_OM()(outer_allocator()), __p, std::forward<_Args>(__args)...);
490 template <class _Tp, class... _Args>
491 _LIBCPP_HIDE_FROM_ABI void __construct(integral_constant<int, 1>, _Tp* __p, _Args&&... __args) {
492 typedef __outermost<outer_allocator_type> _OM;
493 allocator_traits<typename _OM::type>::construct(
494 _OM()(outer_allocator()), __p, allocator_arg, inner_allocator(), std::forward<_Args>(__args)...);
497 template <class _Tp, class... _Args>
498 _LIBCPP_HIDE_FROM_ABI void __construct(integral_constant<int, 2>, _Tp* __p, _Args&&... __args) {
499 typedef __outermost<outer_allocator_type> _OM;
500 allocator_traits<typename _OM::type>::construct(
501 _OM()(outer_allocator()), __p, std::forward<_Args>(__args)..., inner_allocator());
504 template <class... _Args, size_t... _Idx>
505 _LIBCPP_HIDE_FROM_ABI tuple<_Args&&...>
506 __transform_tuple(integral_constant<int, 0>, tuple<_Args...>&& __t, __tuple_indices<_Idx...>) {
507 return std::forward_as_tuple(std::get<_Idx>(std::move(__t))...);
510 template <class... _Args, size_t... _Idx>
511 _LIBCPP_HIDE_FROM_ABI tuple<allocator_arg_t, inner_allocator_type&, _Args&&...>
512 __transform_tuple(integral_constant<int, 1>, tuple<_Args...>&& __t, __tuple_indices<_Idx...>) {
513 using _Tup = tuple<allocator_arg_t, inner_allocator_type&, _Args&&...>;
514 return _Tup(allocator_arg, inner_allocator(), std::get<_Idx>(std::move(__t))...);
517 template <class... _Args, size_t... _Idx>
518 _LIBCPP_HIDE_FROM_ABI tuple<_Args&&..., inner_allocator_type&>
519 __transform_tuple(integral_constant<int, 2>, tuple<_Args...>&& __t, __tuple_indices<_Idx...>) {
520 using _Tup = tuple<_Args&&..., inner_allocator_type&>;
521 return _Tup(std::get<_Idx>(std::move(__t))..., inner_allocator());
525 friend class __scoped_allocator_storage;
528 # if _LIBCPP_STD_VER >= 17
529 template <class _OuterAlloc, class... _InnerAllocs>
530 scoped_allocator_adaptor(_OuterAlloc, _InnerAllocs...) -> scoped_allocator_adaptor<_OuterAlloc, _InnerAllocs...>;
533 template <class _OuterA1, class _OuterA2>
534 inline _LIBCPP_HIDE_FROM_ABI bool
535 operator==(const scoped_allocator_adaptor<_OuterA1>& __a, const scoped_allocator_adaptor<_OuterA2>& __b) _NOEXCEPT {
536 return __a.outer_allocator() == __b.outer_allocator();
539 template <class _OuterA1, class _OuterA2, class _InnerA0, class... _InnerAllocs>
540 inline _LIBCPP_HIDE_FROM_ABI bool
541 operator==(const scoped_allocator_adaptor<_OuterA1, _InnerA0, _InnerAllocs...>& __a,
542 const scoped_allocator_adaptor<_OuterA2, _InnerA0, _InnerAllocs...>& __b) _NOEXCEPT {
543 return __a.outer_allocator() == __b.outer_allocator() && __a.inner_allocator() == __b.inner_allocator();
546 # if _LIBCPP_STD_VER <= 17
548 template <class _OuterA1, class _OuterA2, class... _InnerAllocs>
549 inline _LIBCPP_HIDE_FROM_ABI bool operator!=(const scoped_allocator_adaptor<_OuterA1, _InnerAllocs...>& __a,
550 const scoped_allocator_adaptor<_OuterA2, _InnerAllocs...>& __b) _NOEXCEPT {
551 return !(__a == __b);
554 # endif // _LIBCPP_STD_VER <= 17
556 # endif // !defined(_LIBCPP_CXX03_LANG)
558 _LIBCPP_END_NAMESPACE_STD
562 # if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
571 # include <stdexcept>
572 # include <type_traits>
575 #endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
577 #endif // _LIBCPP_SCOPED_ALLOCATOR