29 #ifndef _SCOPED_ALLOCATOR
30 #define _SCOPED_ALLOCATOR 1
32 #pragma GCC system_header
34 #if __cplusplus < 201103L
42 namespace std _GLIBCXX_VISIBILITY(default)
44 _GLIBCXX_BEGIN_NAMESPACE_VERSION
46 template<
template<
typename>
class _Pred,
typename... _Allocs>
49 template<
template<
typename>
class _Pred,
typename _Alloc,
typename... _Allocs>
50 struct __any_of<_Pred, _Alloc, _Allocs...>
51 : __or_<_Pred<_Alloc>, __any_of<_Pred, _Allocs...>>
54 template<
template<
typename>
class _Pred,
typename _Alloc>
55 struct __any_of<_Pred, _Alloc>
64 template<
typename _Alloc>
65 struct __propagate_on_copy
66 : allocator_traits<_Alloc>::propagate_on_container_copy_assignment
68 template<
typename _Alloc>
69 struct __propagate_on_move
70 : allocator_traits<_Alloc>::propagate_on_container_move_assignment
72 template<
typename _Alloc>
73 struct __propagate_on_swap
74 : allocator_traits<_Alloc>::propagate_on_container_swap
78 template<
typename _Alloc>
80 __do_outermost(_Alloc& __a, _Alloc*) -> decltype(__a.outer_allocator())
81 {
return __a.outer_allocator(); }
83 template<
typename _Alloc>
85 __do_outermost(_Alloc& __a, ...)
89 template<
typename _Alloc>
91 __outermost(_Alloc& __a) -> decltype(__do_outermost(__a, &__a))
92 {
return __do_outermost(__a, &__a); }
94 template<
typename _OuterAlloc,
typename... _InnerAllocs>
98 struct __inner_type_impl;
100 template<
typename _Outer>
101 struct __inner_type_impl<_Outer>
105 __inner_type_impl() =
default;
106 __inner_type_impl(
const __inner_type_impl&) =
default;
107 __inner_type_impl(__inner_type_impl&&) =
default;
108 __inner_type_impl& operator=(
const __inner_type_impl&) =
default;
109 __inner_type_impl& operator=(__inner_type_impl&&) =
default;
111 template<
typename _Alloc>
112 __inner_type_impl(
const __inner_type_impl<_Alloc>& __other)
115 template<
typename _Alloc>
116 __inner_type_impl(__inner_type_impl<_Alloc>&& __other)
120 _M_get(__type* __p) noexcept {
return *__p; }
123 _M_get(
const __type* __p)
const noexcept {
return *__p; }
126 _M_tie() const noexcept {
return tuple<>(); }
129 operator==(
const __inner_type_impl&) const noexcept
133 template<
typename _Outer,
typename _InnerHead,
typename... _InnerTail>
134 struct __inner_type_impl<_Outer, _InnerHead, _InnerTail...>
136 typedef scoped_allocator_adaptor<_InnerHead, _InnerTail...> __type;
138 __inner_type_impl() =
default;
139 __inner_type_impl(
const __inner_type_impl&) =
default;
140 __inner_type_impl(__inner_type_impl&&) =
default;
141 __inner_type_impl& operator=(
const __inner_type_impl&) =
default;
142 __inner_type_impl& operator=(__inner_type_impl&&) =
default;
144 template<
typename... _Allocs>
145 __inner_type_impl(
const __inner_type_impl<_Allocs...>& __other)
146 : _M_inner(__other._M_inner) { }
148 template<
typename... _Allocs>
149 __inner_type_impl(__inner_type_impl<_Allocs...>&& __other)
150 : _M_inner(std::move(__other._M_inner)) { }
152 template<
typename... _Args>
154 __inner_type_impl(_Args&&... __args)
155 : _M_inner(std::
forward<_Args>(__args)...) { }
158 _M_get(
void*) noexcept {
return _M_inner; }
161 _M_get(
const void*) const noexcept {
return _M_inner; }
163 tuple<
const _InnerHead&,
const _InnerTail&...>
164 _M_tie() const noexcept
165 {
return _M_inner._M_tie(); }
168 operator==(
const __inner_type_impl& __other)
const noexcept
169 {
return _M_inner == __other._M_inner; }
172 template<
typename...>
friend class __inner_type_impl;
173 template<
typename,
typename...>
friend class scoped_allocator_adaptor;
179 template<
typename _OuterAlloc,
typename... _InnerAllocs>
180 class scoped_allocator_adaptor
183 typedef allocator_traits<_OuterAlloc> __traits;
185 typedef __inner_type_impl<_OuterAlloc, _InnerAllocs...> __inner_type;
186 __inner_type _M_inner;
188 template<
typename _Outer,
typename... _Inner>
189 friend class scoped_allocator_adaptor;
191 template<
typename...>
192 friend class __inner_type_impl;
194 tuple<
const _OuterAlloc&,
const _InnerAllocs&...>
195 _M_tie() const noexcept
196 {
return std::tuple_cat(
std::tie(outer_allocator()), _M_inner._M_tie()); }
198 template<
typename _Alloc>
199 using __outermost_type =
typename
202 template<
typename _Alloc>
203 using __outermost_alloc_traits
204 = allocator_traits<__outermost_type<_Alloc>>;
206 template<
typename _Tp,
typename... _Args>
208 _M_construct(__uses_alloc0, _Tp* __p, _Args&&... __args)
210 typedef __outermost_alloc_traits<scoped_allocator_adaptor> _O_traits;
211 _O_traits::construct(__outermost(*
this), __p,
212 std::forward<_Args>(__args)...);
215 typedef __uses_alloc1<typename __inner_type::__type> __uses_alloc1_;
216 typedef __uses_alloc2<typename __inner_type::__type> __uses_alloc2_;
218 template<
typename _Tp,
typename... _Args>
220 _M_construct(__uses_alloc1_, _Tp* __p, _Args&&... __args)
222 typedef __outermost_alloc_traits<scoped_allocator_adaptor> _O_traits;
223 _O_traits::construct(__outermost(*
this), __p,
224 allocator_arg, inner_allocator(),
225 std::forward<_Args>(__args)...);
228 template<
typename _Tp,
typename... _Args>
230 _M_construct(__uses_alloc2_, _Tp* __p, _Args&&... __args)
232 typedef __outermost_alloc_traits<scoped_allocator_adaptor> _O_traits;
233 _O_traits::construct(__outermost(*
this), __p,
234 std::forward<_Args>(__args)...,
238 template<
typename _Alloc>
240 _S_select_on_copy(
const _Alloc& __a)
242 typedef allocator_traits<_Alloc> __a_traits;
243 return __a_traits::select_on_container_copy_construction(__a);
246 template<std::size_t... _Indices>
247 scoped_allocator_adaptor(tuple<
const _OuterAlloc&,
248 const _InnerAllocs&...> __refs,
249 _Index_tuple<_Indices...>)
250 : _OuterAlloc(_S_select_on_copy(std::get<0>(__refs))),
251 _M_inner(_S_select_on_copy(std::get<_Indices+1>(__refs))...)
255 typedef _OuterAlloc outer_allocator_type;
256 typedef typename __inner_type::__type inner_allocator_type;
266 typedef typename conditional<
267 __any_of<__propagate_on_copy, _OuterAlloc, _InnerAllocs...>::value,
269 typedef typename conditional<
270 __any_of<__propagate_on_move, _OuterAlloc, _InnerAllocs...>::value,
272 typedef typename conditional<
273 __any_of<__propagate_on_swap, _OuterAlloc, _InnerAllocs...>::value,
279 typedef scoped_allocator_adaptor<
280 typename __traits::template rebind_alloc<_Tp>,
281 _InnerAllocs...> other;
284 scoped_allocator_adaptor() : _OuterAlloc(), _M_inner() { }
286 template<
typename _Outer2>
287 scoped_allocator_adaptor(_Outer2&& __outer,
288 const _InnerAllocs&... __inner)
289 : _OuterAlloc(std::
forward<_Outer2>(__outer)),
293 scoped_allocator_adaptor(
const scoped_allocator_adaptor& __other)
294 : _OuterAlloc(__other.outer_allocator()),
295 _M_inner(__other._M_inner)
298 scoped_allocator_adaptor(scoped_allocator_adaptor&& __other)
299 : _OuterAlloc(std::move(__other.outer_allocator())),
300 _M_inner(std::move(__other._M_inner))
303 template<
typename _Outer2>
304 scoped_allocator_adaptor(
305 const scoped_allocator_adaptor<_Outer2, _InnerAllocs...>& __other)
306 : _OuterAlloc(__other.outer_allocator()),
307 _M_inner(__other._M_inner)
310 template<
typename _Outer2>
311 scoped_allocator_adaptor(
312 scoped_allocator_adaptor<_Outer2, _InnerAllocs...>&& __other)
313 : _OuterAlloc(std::move(__other.outer_allocator())),
314 _M_inner(std::move(__other._M_inner))
317 scoped_allocator_adaptor&
318 operator=(
const scoped_allocator_adaptor&) =
default;
320 scoped_allocator_adaptor&
321 operator=(scoped_allocator_adaptor&&) =
default;
323 inner_allocator_type& inner_allocator() noexcept
324 {
return _M_inner._M_get(
this); }
326 const inner_allocator_type& inner_allocator() const noexcept
327 {
return _M_inner._M_get(
this); }
329 outer_allocator_type& outer_allocator() noexcept
330 {
return static_cast<_OuterAlloc&
>(*this); }
332 const outer_allocator_type& outer_allocator() const noexcept
333 {
return static_cast<const _OuterAlloc&
>(*this); }
335 pointer allocate(size_type __n)
338 pointer allocate(size_type __n, const_void_pointer __hint)
341 void deallocate(pointer __p, size_type __n)
344 size_type max_size()
const
347 template<
typename _Tp,
typename... _Args>
348 void construct(_Tp* __p, _Args&&... __args)
350 auto& __inner = inner_allocator();
352 = __use_alloc<_Tp, inner_allocator_type, _Args...>(__inner);
353 _M_construct(__use_tag, __p, std::forward<_Args>(__args)...);
356 template<
typename _T1,
typename _T2,
typename... _Args1,
359 construct(pair<_T1, _T2>* __p, piecewise_construct_t,
360 tuple<_Args1...> __x, tuple<_Args2...> __y)
364 auto& __inner = inner_allocator();
366 = __use_alloc<_T1, inner_allocator_type, _Args1...>(__inner);
368 = __use_alloc<_T2, inner_allocator_type, _Args2...>(__inner);
369 typedef __outermost_alloc_traits<scoped_allocator_adaptor> _O_traits;
371 _M_construct_p(__x_use_tag, __x),
372 _M_construct_p(__y_use_tag, __y));
375 template<
typename _T1,
typename _T2>
377 construct(pair<_T1, _T2>* __p)
380 template<
typename _T1,
typename _T2,
typename _Up,
typename _Vp>
382 construct(pair<_T1, _T2>* __p, _Up&& __u, _Vp&& __v)
385 std::forward_as_tuple(std::forward<_Up>(__u)),
386 std::forward_as_tuple(std::forward<_Vp>(__v)));
389 template<
typename _T1,
typename _T2,
typename _Up,
typename _Vp>
391 construct(pair<_T1, _T2>* __p,
const pair<_Up, _Vp>& __x)
394 std::forward_as_tuple(__x.first),
395 std::forward_as_tuple(__x.second));
398 template<
typename _T1,
typename _T2,
typename _Up,
typename _Vp>
400 construct(pair<_T1, _T2>* __p, pair<_Up, _Vp>&& __x)
403 std::forward_as_tuple(std::forward<_Up>(__x.first)),
404 std::forward_as_tuple(std::forward<_Vp>(__x.second)));
407 template<
typename _Tp>
408 void destroy(_Tp* __p)
410 typedef __outermost_alloc_traits<scoped_allocator_adaptor> _O_traits;
411 _O_traits::destroy(__outermost(*
this), __p);
414 scoped_allocator_adaptor
415 select_on_container_copy_construction()
const
417 typedef typename _Build_index_tuple<
sizeof...(_InnerAllocs)>::__type
419 return scoped_allocator_adaptor(_M_tie(), _Indices());
422 template <
typename _OutA1,
typename _OutA2,
typename... _InA>
424 operator==(
const scoped_allocator_adaptor<_OutA1, _InA...>& __a,
425 const scoped_allocator_adaptor<_OutA2, _InA...>& __b) noexcept;
428 template<
typename _Tuple>
430 _M_construct_p(__uses_alloc0, _Tuple& __t)
431 {
return std::move(__t); }
433 template<
typename... _Args>
434 std::tuple<allocator_arg_t, inner_allocator_type&, _Args...>
438 return std::tuple_cat(_Tuple(allocator_arg, inner_allocator()),
442 template<
typename... _Args>
447 return std::tuple_cat(std::move(__t), _Tuple(inner_allocator()));
451 template <
typename _OutA1,
typename _OutA2,
typename... _InA>
453 operator==(
const scoped_allocator_adaptor<_OutA1, _InA...>& __a,
454 const scoped_allocator_adaptor<_OutA2, _InA...>& __b) noexcept
456 return __a.outer_allocator() == __b.outer_allocator()
457 && __a._M_inner == __b._M_inner;
460 template <
typename _OutA1,
typename _OutA2,
typename... _InA>
462 operator!=(
const scoped_allocator_adaptor<_OutA1, _InA...>& __a,
463 const scoped_allocator_adaptor<_OutA2, _InA...>& __b) noexcept
464 {
return !(__a == __b); }
468 _GLIBCXX_END_NAMESPACE_VERSION
473 #endif // _SCOPED_ALLOCATOR
__pointer pointer
The allocator's pointer type.
tuple< _Elements &...> tie(_Elements &...__args) noexcept
tie
constexpr _Tp && forward(typename std::remove_reference< _Tp >::type &__t) noexcept
Forward an lvalue.
constexpr piecewise_construct_t piecewise_construct
piecewise_construct
static size_type max_size(const _Alloc &__a)
The maximum supported allocation size.
__const_void_pointer const_void_pointer
The allocator's const void pointer type.
__void_pointer void_pointer
The allocator's void pointer type.
static void deallocate(_Alloc &__a, pointer __p, size_type __n)
Deallocate memory.
integral_constant< bool, false > false_type
The type used as a compile-time boolean with false value.
__const_pointer const_pointer
The allocator's const pointer type.
static pointer allocate(_Alloc &__a, size_type __n)
Allocate memory.
integral_constant< bool, true > true_type
The type used as a compile-time boolean with true value.
Primary class template, tuple.
__difference_type difference_type
The allocator's difference type.
_Alloc::value_type value_type
The allocated type.
__size_type size_type
The allocator's size type.