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 //===----------------------------------------------------------------------===//
19 template <class T, class Container = deque<T>>
23 typedef Container container_type;
24 typedef typename container_type::value_type value_type;
25 typedef typename container_type::reference reference;
26 typedef typename container_type::const_reference const_reference;
27 typedef typename container_type::size_type size_type;
36 stack(const stack& q) = default;
37 stack(stack&& q) = default;
39 stack& operator=(const stack& q) = default;
40 stack& operator=(stack&& q) = default;
42 explicit stack(const container_type& c);
43 explicit stack(container_type&& c);
44 template <class InputIterator> stack(InputIterator first, InputIterator last); // since C++23
45 template <class Alloc> explicit stack(const Alloc& a);
46 template <class Alloc> stack(const container_type& c, const Alloc& a);
47 template <class Alloc> stack(container_type&& c, const Alloc& a);
48 template <class Alloc> stack(const stack& c, const Alloc& a);
49 template <class Alloc> stack(stack&& c, const Alloc& a);
50 template<class InputIterator, class Alloc>
51 stack(InputIterator first, InputIterator last, const Alloc&); // since C++23
54 size_type size() const;
56 const_reference top() const;
58 void push(const value_type& x);
59 void push(value_type&& x);
60 template <class... Args> reference emplace(Args&&... args); // reference in C++17
63 void swap(stack& c) noexcept(is_nothrow_swappable_v<Container>)
66 template<class Container>
67 stack(Container) -> stack<typename Container::value_type, Container>; // C++17
69 template<class InputIterator>
70 stack(InputIterator, InputIterator) -> stack<iter-value-type<InputIterator>>; // since C++23
72 template<class Container, class Allocator>
73 stack(Container, Allocator) -> stack<typename Container::value_type, Container>; // C++17
75 template<class InputIterator, class Allocator>
76 stack(InputIterator, InputIterator, Allocator)
77 -> stack<iter-value-type<InputIterator>,
78 deque<iter-value-type<InputIterator>, Allocator>>; // since C++23
80 template <class T, class Container>
81 bool operator==(const stack<T, Container>& x, const stack<T, Container>& y);
82 template <class T, class Container>
83 bool operator< (const stack<T, Container>& x, const stack<T, Container>& y);
84 template <class T, class Container>
85 bool operator!=(const stack<T, Container>& x, const stack<T, Container>& y);
86 template <class T, class Container>
87 bool operator> (const stack<T, Container>& x, const stack<T, Container>& y);
88 template <class T, class Container>
89 bool operator>=(const stack<T, Container>& x, const stack<T, Container>& y);
90 template <class T, class Container>
91 bool operator<=(const stack<T, Container>& x, const stack<T, Container>& y);
93 template <class T, class Container>
94 void swap(stack<T, Container>& x, stack<T, Container>& y)
95 noexcept(noexcept(x.swap(y)));
102 #include <__iterator/iterator_traits.h>
103 #include <__memory/uses_allocator.h>
104 #include <__utility/forward.h>
106 #include <type_traits>
109 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
110 #pragma GCC system_header
113 _LIBCPP_BEGIN_NAMESPACE_STD
115 template <class _Tp, class _Container = deque<_Tp> > class _LIBCPP_TEMPLATE_VIS stack;
117 template <class _Tp, class _Container>
118 _LIBCPP_INLINE_VISIBILITY
120 operator==(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y);
122 template <class _Tp, class _Container>
123 _LIBCPP_INLINE_VISIBILITY
125 operator< (const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y);
127 template <class _Tp, class _Container /*= deque<_Tp>*/>
128 class _LIBCPP_TEMPLATE_VIS stack
131 typedef _Container container_type;
132 typedef typename container_type::value_type value_type;
133 typedef typename container_type::reference reference;
134 typedef typename container_type::const_reference const_reference;
135 typedef typename container_type::size_type size_type;
136 static_assert((is_same<_Tp, value_type>::value), "" );
142 _LIBCPP_INLINE_VISIBILITY
144 _NOEXCEPT_(is_nothrow_default_constructible<container_type>::value)
147 _LIBCPP_INLINE_VISIBILITY
148 stack(const stack& __q) : c(__q.c) {}
150 _LIBCPP_INLINE_VISIBILITY
151 stack& operator=(const stack& __q) {c = __q.c; return *this;}
154 #ifndef _LIBCPP_CXX03_LANG
155 _LIBCPP_INLINE_VISIBILITY
157 _NOEXCEPT_(is_nothrow_move_constructible<container_type>::value)
158 : c(_VSTD::move(__q.c)) {}
160 _LIBCPP_INLINE_VISIBILITY
161 stack& operator=(stack&& __q)
162 _NOEXCEPT_(is_nothrow_move_assignable<container_type>::value)
163 {c = _VSTD::move(__q.c); return *this;}
165 _LIBCPP_INLINE_VISIBILITY
166 explicit stack(container_type&& __c) : c(_VSTD::move(__c)) {}
167 #endif // _LIBCPP_CXX03_LANG
169 _LIBCPP_INLINE_VISIBILITY
170 explicit stack(const container_type& __c) : c(__c) {}
172 template <class _Alloc>
173 _LIBCPP_INLINE_VISIBILITY
174 explicit stack(const _Alloc& __a,
175 __enable_if_t<uses_allocator<container_type, _Alloc>::value>* = 0)
177 template <class _Alloc>
178 _LIBCPP_INLINE_VISIBILITY
179 stack(const container_type& __c, const _Alloc& __a,
180 __enable_if_t<uses_allocator<container_type, _Alloc>::value>* = 0)
182 template <class _Alloc>
183 _LIBCPP_INLINE_VISIBILITY
184 stack(const stack& __s, const _Alloc& __a,
185 __enable_if_t<uses_allocator<container_type, _Alloc>::value>* = 0)
187 #ifndef _LIBCPP_CXX03_LANG
188 template <class _Alloc>
189 _LIBCPP_INLINE_VISIBILITY
190 stack(container_type&& __c, const _Alloc& __a,
191 __enable_if_t<uses_allocator<container_type, _Alloc>::value>* = 0)
192 : c(_VSTD::move(__c), __a) {}
193 template <class _Alloc>
194 _LIBCPP_INLINE_VISIBILITY
195 stack(stack&& __s, const _Alloc& __a,
196 __enable_if_t<uses_allocator<container_type, _Alloc>::value>* = 0)
197 : c(_VSTD::move(__s.c), __a) {}
198 #endif // _LIBCPP_CXX03_LANG
200 #if _LIBCPP_STD_VER > 20
201 template <class _InputIterator,
202 class = __enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value>>
203 _LIBCPP_HIDE_FROM_ABI
204 stack(_InputIterator __first, _InputIterator __last) : c(__first, __last) {}
206 template <class _InputIterator,
208 class = __enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value>,
209 class = __enable_if_t<uses_allocator<container_type, _Alloc>::value>>
210 _LIBCPP_HIDE_FROM_ABI
211 stack(_InputIterator __first, _InputIterator __last, const _Alloc& __alloc) : c(__first, __last, __alloc) {}
214 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY
215 bool empty() const {return c.empty();}
216 _LIBCPP_INLINE_VISIBILITY
217 size_type size() const {return c.size();}
218 _LIBCPP_INLINE_VISIBILITY
219 reference top() {return c.back();}
220 _LIBCPP_INLINE_VISIBILITY
221 const_reference top() const {return c.back();}
223 _LIBCPP_INLINE_VISIBILITY
224 void push(const value_type& __v) {c.push_back(__v);}
225 #ifndef _LIBCPP_CXX03_LANG
226 _LIBCPP_INLINE_VISIBILITY
227 void push(value_type&& __v) {c.push_back(_VSTD::move(__v));}
229 template <class... _Args>
230 _LIBCPP_INLINE_VISIBILITY
231 #if _LIBCPP_STD_VER > 14
232 decltype(auto) emplace(_Args&&... __args)
233 { return c.emplace_back(_VSTD::forward<_Args>(__args)...);}
235 void emplace(_Args&&... __args)
236 { c.emplace_back(_VSTD::forward<_Args>(__args)...);}
238 #endif // _LIBCPP_CXX03_LANG
240 _LIBCPP_INLINE_VISIBILITY
241 void pop() {c.pop_back();}
243 _LIBCPP_INLINE_VISIBILITY
244 void swap(stack& __s)
245 _NOEXCEPT_(__is_nothrow_swappable<container_type>::value)
251 template <class T1, class _C1>
254 operator==(const stack<T1, _C1>& __x, const stack<T1, _C1>& __y);
256 template <class T1, class _C1>
259 operator< (const stack<T1, _C1>& __x, const stack<T1, _C1>& __y);
262 #if _LIBCPP_STD_VER > 14
263 template<class _Container,
264 class = enable_if_t<!__is_allocator<_Container>::value>
267 -> stack<typename _Container::value_type, _Container>;
269 template<class _Container,
271 class = enable_if_t<!__is_allocator<_Container>::value>,
272 class = enable_if_t<uses_allocator<_Container, _Alloc>::value>
274 stack(_Container, _Alloc)
275 -> stack<typename _Container::value_type, _Container>;
278 #if _LIBCPP_STD_VER > 20
279 template<class _InputIterator,
280 class = __enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value>>
281 stack(_InputIterator, _InputIterator)
282 -> stack<__iter_value_type<_InputIterator>>;
284 template<class _InputIterator,
286 class = __enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value>,
287 class = __enable_if_t<__is_allocator<_Alloc>::value>>
288 stack(_InputIterator, _InputIterator, _Alloc)
289 -> stack<__iter_value_type<_InputIterator>, deque<__iter_value_type<_InputIterator>, _Alloc>>;
292 template <class _Tp, class _Container>
293 inline _LIBCPP_INLINE_VISIBILITY
295 operator==(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y)
297 return __x.c == __y.c;
300 template <class _Tp, class _Container>
301 inline _LIBCPP_INLINE_VISIBILITY
303 operator< (const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y)
305 return __x.c < __y.c;
308 template <class _Tp, class _Container>
309 inline _LIBCPP_INLINE_VISIBILITY
311 operator!=(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y)
313 return !(__x == __y);
316 template <class _Tp, class _Container>
317 inline _LIBCPP_INLINE_VISIBILITY
319 operator> (const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y)
324 template <class _Tp, class _Container>
325 inline _LIBCPP_INLINE_VISIBILITY
327 operator>=(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y)
332 template <class _Tp, class _Container>
333 inline _LIBCPP_INLINE_VISIBILITY
335 operator<=(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y)
340 template <class _Tp, class _Container>
341 inline _LIBCPP_INLINE_VISIBILITY
342 __enable_if_t<__is_swappable<_Container>::value, void>
343 swap(stack<_Tp, _Container>& __x, stack<_Tp, _Container>& __y)
344 _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
349 template <class _Tp, class _Container, class _Alloc>
350 struct _LIBCPP_TEMPLATE_VIS uses_allocator<stack<_Tp, _Container>, _Alloc>
351 : public uses_allocator<_Container, _Alloc>
355 _LIBCPP_END_NAMESPACE_STD
357 #endif // _LIBCPP_STACK