1/*
2 *
3 * Copyright (c) 1994
4 * Hewlett-Packard Company
5 *
6 * Permission to use, copy, modify, distribute and sell this software
7 * and its documentation for any purpose is hereby granted without fee,
8 * provided that the above copyright notice appear in all copies and
9 * that both that copyright notice and this permission notice appear
10 * in supporting documentation.  Hewlett-Packard Company makes no
11 * representations about the suitability of this software for any
12 * purpose.  It is provided "as is" without express or implied warranty.
13 *
14 *
15 * Copyright (c) 1996,1997
16 * Silicon Graphics Computer Systems, Inc.
17 *
18 * Permission to use, copy, modify, distribute and sell this software
19 * and its documentation for any purpose is hereby granted without fee,
20 * provided that the above copyright notice appear in all copies and
21 * that both that copyright notice and this permission notice appear
22 * in supporting documentation.  Silicon Graphics makes no
23 * representations about the suitability of this software for any
24 * purpose.  It is provided "as is" without express or implied warranty.
25 */
26
27/* NOTE: This is an internal header file, included by other STL headers.
28 *   You should not attempt to use it directly.
29 */
30
31#ifndef __SGI_STL_INTERNAL_STACK_H
32#define __SGI_STL_INTERNAL_STACK_H
33
34__STL_BEGIN_NAMESPACE
35
36#ifndef __STL_LIMITED_DEFAULT_TEMPLATES
37template <class _Tp, class _Sequence = deque<_Tp> >
38#else
39template <class _Tp, class _Sequence>
40#endif
41class stack {
42  friend bool operator== __STL_NULL_TMPL_ARGS (const stack&, const stack&);
43  friend bool operator< __STL_NULL_TMPL_ARGS (const stack&, const stack&);
44public:
45  typedef typename _Sequence::value_type      value_type;
46  typedef typename _Sequence::size_type       size_type;
47  typedef          _Sequence                  container_type;
48
49  typedef typename _Sequence::reference       reference;
50  typedef typename _Sequence::const_reference const_reference;
51protected:
52  _Sequence _M_c;
53public:
54  stack() : _M_c() {}
55  explicit stack(const _Sequence& __s) : _M_c(__s) {}
56
57  bool empty() const { return _M_c.empty(); }
58  size_type size() const { return _M_c.size(); }
59  reference top() { return _M_c.back(); }
60  const_reference top() const { return _M_c.back(); }
61  void push(const value_type& __x) { _M_c.push_back(__x); }
62  void pop() { _M_c.pop_back(); }
63};
64
65template <class _Tp, class _Seq>
66bool operator==(const stack<_Tp,_Seq>& __x, const stack<_Tp,_Seq>& __y)
67{
68  return __x._M_c == __y._M_c;
69}
70
71template <class _Tp, class _Seq>
72bool operator<(const stack<_Tp,_Seq>& __x, const stack<_Tp,_Seq>& __y)
73{
74  return __x._M_c < __y._M_c;
75}
76
77#ifdef __STL_FUNCTION_TMPL_PARTIAL_ORDER
78
79template <class _Tp, class _Seq>
80bool operator!=(const stack<_Tp,_Seq>& __x, const stack<_Tp,_Seq>& __y)
81{
82  return !(__x == __y);
83}
84
85template <class _Tp, class _Seq>
86bool operator>(const stack<_Tp,_Seq>& __x, const stack<_Tp,_Seq>& __y)
87{
88  return __y < __x;
89}
90
91template <class _Tp, class _Seq>
92bool operator<=(const stack<_Tp,_Seq>& __x, const stack<_Tp,_Seq>& __y)
93{
94  return !(__y < __x);
95}
96
97template <class _Tp, class _Seq>
98bool operator>=(const stack<_Tp,_Seq>& __x, const stack<_Tp,_Seq>& __y)
99{
100  return !(__x < __y);
101}
102
103#endif /* __STL_FUNCTION_TMPL_PARTIAL_ORDER */
104
105__STL_END_NAMESPACE
106
107#endif /* __SGI_STL_INTERNAL_STACK_H */
108
109// Local Variables:
110// mode:C++
111// End:
112