stack revision 262801 
1// -*- C++ -*-
2//===---------------------------- stack -----------------------------------===//
3//
4//                     The LLVM Compiler Infrastructure
5//
6// This file is dual licensed under the MIT and the University of Illinois Open
7// Source Licenses. See LICENSE.TXT for details.
8//
9//===----------------------------------------------------------------------===//
10
11#ifndef _LIBCPP_STACK
12#define _LIBCPP_STACK
13
14/*
15    stack synopsis
16
17namespace std
18{
19
20template <class T, class Container = deque<T>>
21class stack
22{
23public:
24    typedef Container                                container_type;
25    typedef typename container_type::value_type      value_type;
26    typedef typename container_type::reference       reference;
27    typedef typename container_type::const_reference const_reference;
28    typedef typename container_type::size_type       size_type;
29
30protected:
31    container_type c;
32
33public:
34    stack() = default;
35    ~stack() = default;
36
37    stack(const stack& q) = default;
38    stack(stack&& q) = default;
39
40    stack& operator=(const stack& q) = default;
41    stack& operator=(stack&& q) = default;
42
43    explicit stack(const container_type& c);
44    explicit stack(container_type&& c);
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
51    bool empty() const;
52    size_type size() const;
53    reference top();
54    const_reference top() const;
55
56    void push(const value_type& x);
57    void push(value_type&& x);
58    template <class... Args> void emplace(Args&&... args);
59    void pop();
60
61    void swap(stack& c) noexcept(noexcept(swap(c, q.c)));
62};
63
64template <class T, class Container>
65  bool operator==(const stack<T, Container>& x, const stack<T, Container>& y);
66template <class T, class Container>
67  bool operator< (const stack<T, Container>& x, const stack<T, Container>& y);
68template <class T, class Container>
69  bool operator!=(const stack<T, Container>& x, const stack<T, Container>& y);
70template <class T, class Container>
71  bool operator> (const stack<T, Container>& x, const stack<T, Container>& y);
72template <class T, class Container>
73  bool operator>=(const stack<T, Container>& x, const stack<T, Container>& y);
74template <class T, class Container>
75  bool operator<=(const stack<T, Container>& x, const stack<T, Container>& y);
76
77template <class T, class Container>
78  void swap(stack<T, Container>& x, stack<T, Container>& y)
79  noexcept(noexcept(x.swap(y)));
80
81}  // std
82
83*/
84
85#include <__config>
86#include <deque>
87
88#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
89#pragma GCC system_header
90#endif
91
92_LIBCPP_BEGIN_NAMESPACE_STD
93
94template <class _Tp, class _Container> class _LIBCPP_TYPE_VIS_ONLY stack;
95
96template <class _Tp, class _Container>
97_LIBCPP_INLINE_VISIBILITY
98bool
99operator==(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y);
100
101template <class _Tp, class _Container>
102_LIBCPP_INLINE_VISIBILITY
103bool
104operator< (const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y);
105
106template <class _Tp, class _Container = deque<_Tp> >
107class _LIBCPP_TYPE_VIS_ONLY stack
108{
109public:
110    typedef _Container                               container_type;
111    typedef typename container_type::value_type      value_type;
112    typedef typename container_type::reference       reference;
113    typedef typename container_type::const_reference const_reference;
114    typedef typename container_type::size_type       size_type;
115
116protected:
117    container_type c;
118
119public:
120    _LIBCPP_INLINE_VISIBILITY
121    stack()
122        _NOEXCEPT_(is_nothrow_default_constructible<container_type>::value)
123        : c() {}
124
125    _LIBCPP_INLINE_VISIBILITY
126    stack(const stack& __q) : c(__q.c) {}
127
128#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
129    _LIBCPP_INLINE_VISIBILITY
130    stack(stack&& __q)
131        _NOEXCEPT_(is_nothrow_move_constructible<container_type>::value)
132        : c(_VSTD::move(__q.c)) {}
133#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
134
135    _LIBCPP_INLINE_VISIBILITY
136    stack& operator=(const stack& __q) {c = __q.c; return *this;}
137
138#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
139    _LIBCPP_INLINE_VISIBILITY
140    stack& operator=(stack&& __q)
141        _NOEXCEPT_(is_nothrow_move_assignable<container_type>::value)
142        {c = _VSTD::move(__q.c); return *this;}
143#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
144
145    _LIBCPP_INLINE_VISIBILITY
146    explicit stack(const container_type& __c) : c(__c) {}
147#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
148    _LIBCPP_INLINE_VISIBILITY
149    explicit stack(container_type&& __c) : c(_VSTD::move(__c)) {}
150#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
151    template <class _Alloc>
152        _LIBCPP_INLINE_VISIBILITY
153        explicit stack(const _Alloc& __a,
154                       typename enable_if<uses_allocator<container_type,
155                                                         _Alloc>::value>::type* = 0)
156            : c(__a) {}
157    template <class _Alloc>
158        _LIBCPP_INLINE_VISIBILITY
159        stack(const container_type& __c, const _Alloc& __a,
160              typename enable_if<uses_allocator<container_type,
161                                                _Alloc>::value>::type* = 0)
162            : c(__c, __a) {}
163    template <class _Alloc>
164        _LIBCPP_INLINE_VISIBILITY
165        stack(const stack& __s, const _Alloc& __a,
166              typename enable_if<uses_allocator<container_type,
167                                                _Alloc>::value>::type* = 0)
168            : c(__s.c, __a) {}
169#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
170    template <class _Alloc>
171        _LIBCPP_INLINE_VISIBILITY
172        stack(container_type&& __c, const _Alloc& __a,
173              typename enable_if<uses_allocator<container_type,
174                                                _Alloc>::value>::type* = 0)
175            : c(_VSTD::move(__c), __a) {}
176    template <class _Alloc>
177        _LIBCPP_INLINE_VISIBILITY
178        stack(stack&& __s, const _Alloc& __a,
179              typename enable_if<uses_allocator<container_type,
180                                                _Alloc>::value>::type* = 0)
181            : c(_VSTD::move(__s.c), __a) {}
182#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
183
184    _LIBCPP_INLINE_VISIBILITY
185    bool empty()     const      {return c.empty();}
186    _LIBCPP_INLINE_VISIBILITY
187    size_type size() const      {return c.size();}
188    _LIBCPP_INLINE_VISIBILITY
189    reference top()             {return c.back();}
190    _LIBCPP_INLINE_VISIBILITY
191    const_reference top() const {return c.back();}
192
193    _LIBCPP_INLINE_VISIBILITY
194    void push(const value_type& __v) {c.push_back(__v);}
195#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
196    _LIBCPP_INLINE_VISIBILITY
197    void push(value_type&& __v) {c.push_back(_VSTD::move(__v));}
198#ifndef _LIBCPP_HAS_NO_VARIADICS
199    template <class... _Args>
200        _LIBCPP_INLINE_VISIBILITY
201        void emplace(_Args&&... __args)
202        {c.emplace_back(_VSTD::forward<_Args>(__args)...);}
203#endif  // _LIBCPP_HAS_NO_VARIADICS
204#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
205    _LIBCPP_INLINE_VISIBILITY
206    void pop() {c.pop_back();}
207
208    _LIBCPP_INLINE_VISIBILITY
209    void swap(stack& __s)
210        _NOEXCEPT_(__is_nothrow_swappable<container_type>::value)
211    {
212        using _VSTD::swap;
213        swap(c, __s.c);
214    }
215
216    template <class T1, class _C1>
217    friend
218    bool
219    operator==(const stack<T1, _C1>& __x, const stack<T1, _C1>& __y);
220
221    template <class T1, class _C1>
222    friend
223    bool
224    operator< (const stack<T1, _C1>& __x, const stack<T1, _C1>& __y);
225};
226
227template <class _Tp, class _Container>
228inline _LIBCPP_INLINE_VISIBILITY
229bool
230operator==(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y)
231{
232    return __x.c == __y.c;
233}
234
235template <class _Tp, class _Container>
236inline _LIBCPP_INLINE_VISIBILITY
237bool
238operator< (const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y)
239{
240    return __x.c < __y.c;
241}
242
243template <class _Tp, class _Container>
244inline _LIBCPP_INLINE_VISIBILITY
245bool
246operator!=(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y)
247{
248    return !(__x == __y);
249}
250
251template <class _Tp, class _Container>
252inline _LIBCPP_INLINE_VISIBILITY
253bool
254operator> (const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y)
255{
256    return __y < __x;
257}
258
259template <class _Tp, class _Container>
260inline _LIBCPP_INLINE_VISIBILITY
261bool
262operator>=(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y)
263{
264    return !(__x < __y);
265}
266
267template <class _Tp, class _Container>
268inline _LIBCPP_INLINE_VISIBILITY
269bool
270operator<=(const stack<_Tp, _Container>& __x, const stack<_Tp, _Container>& __y)
271{
272    return !(__y < __x);
273}
274
275template <class _Tp, class _Container>
276inline _LIBCPP_INLINE_VISIBILITY
277void
278swap(stack<_Tp, _Container>& __x, stack<_Tp, _Container>& __y)
279    _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
280{
281    __x.swap(__y);
282}
283
284template <class _Tp, class _Container, class _Alloc>
285struct _LIBCPP_TYPE_VIS_ONLY uses_allocator<stack<_Tp, _Container>, _Alloc>
286    : public uses_allocator<_Container, _Alloc>
287{
288};
289
290_LIBCPP_END_NAMESPACE_STD
291
292#endif  // _LIBCPP_STACK
293