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- // Stack implementation -*- C++ -*-
-
- // Copyright (C) 2001 Free Software Foundation, Inc.
- //
- // This file is part of the GNU ISO C++ Library. This library is free
- // software; you can redistribute it and/or modify it under the
- // terms of the GNU General Public License as published by the
- // Free Software Foundation; either version 2, or (at your option)
- // any later version.
-
- // This library is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU General Public License for more details.
-
- // You should have received a copy of the GNU General Public License along
- // with this library; see the file COPYING. If not, write to the Free
- // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- // USA.
-
- // As a special exception, you may use this file as part of a free software
- // library without restriction. Specifically, if other files instantiate
- // templates or use macros or inline functions from this file, or you compile
- // this file and link it with other files to produce an executable, this
- // file does not by itself cause the resulting executable to be covered by
- // the GNU General Public License. This exception does not however
- // invalidate any other reasons why the executable file might be covered by
- // the GNU General Public License.
-
- /*
- *
- * Copyright (c) 1994
- * Hewlett-Packard Company
- *
- * Permission to use, copy, modify, distribute and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies and
- * that both that copyright notice and this permission notice appear
- * in supporting documentation. Hewlett-Packard Company makes no
- * representations about the suitability of this software for any
- * purpose. It is provided "as is" without express or implied warranty.
- *
- *
- * Copyright (c) 1996,1997
- * Silicon Graphics Computer Systems, Inc.
- *
- * Permission to use, copy, modify, distribute and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies and
- * that both that copyright notice and this permission notice appear
- * in supporting documentation. Silicon Graphics makes no
- * representations about the suitability of this software for any
- * purpose. It is provided "as is" without express or implied warranty.
- */
-
- /** @file stl_stack.h
- * This is an internal header file, included by other library headers.
- * You should not attempt to use it directly.
- */
-
- #ifndef __GLIBCPP_INTERNAL_STACK_H
- #define __GLIBCPP_INTERNAL_STACK_H
-
- #include <bits/concept_check.h>
-
- namespace std
- {
-
- // Forward declarations of operators == and <, needed for friend declaration.
-
- template <class _Tp,
- class _Sequence = deque<_Tp> >
- class stack;
-
- template <class _Tp, class _Seq>
- bool operator==(const stack<_Tp,_Seq>& __x, const stack<_Tp,_Seq>& __y);
-
- template <class _Tp, class _Seq>
- bool operator<(const stack<_Tp,_Seq>& __x, const stack<_Tp,_Seq>& __y);
-
-
- template <class _Tp, class _Sequence>
- class stack
- {
- // concept requirements
- __glibcpp_class_requires(_Tp, _SGIAssignableConcept)
- __glibcpp_class_requires(_Sequence, _BackInsertionSequenceConcept)
- typedef typename _Sequence::value_type _Sequence_value_type;
- __glibcpp_class_requires2(_Tp, _Sequence_value_type, _SameTypeConcept);
-
- template <class _Tp1, class _Seq1>
- friend bool operator== (const stack<_Tp1, _Seq1>&,
- const stack<_Tp1, _Seq1>&);
- template <class _Tp1, class _Seq1>
- friend bool operator< (const stack<_Tp1, _Seq1>&,
- const stack<_Tp1, _Seq1>&);
- public:
- typedef typename _Sequence::value_type value_type;
- typedef typename _Sequence::size_type size_type;
- typedef _Sequence container_type;
-
- typedef typename _Sequence::reference reference;
- typedef typename _Sequence::const_reference const_reference;
- protected:
- _Sequence c;
- public:
- stack() : c() {}
- explicit stack(const _Sequence& __s) : c(__s) {}
-
- bool empty() const { return c.empty(); }
- size_type size() const { return c.size(); }
- reference top() { return c.back(); }
- const_reference top() const { return c.back(); }
- void push(const value_type& __x) { c.push_back(__x); }
- void pop() { c.pop_back(); }
- };
-
- template <class _Tp, class _Seq>
- bool operator==(const stack<_Tp,_Seq>& __x, const stack<_Tp,_Seq>& __y)
- {
- return __x.c == __y.c;
- }
-
- template <class _Tp, class _Seq>
- bool operator<(const stack<_Tp,_Seq>& __x, const stack<_Tp,_Seq>& __y)
- {
- return __x.c < __y.c;
- }
-
- template <class _Tp, class _Seq>
- bool operator!=(const stack<_Tp,_Seq>& __x, const stack<_Tp,_Seq>& __y)
- {
- return !(__x == __y);
- }
-
- template <class _Tp, class _Seq>
- bool operator>(const stack<_Tp,_Seq>& __x, const stack<_Tp,_Seq>& __y)
- {
- return __y < __x;
- }
-
- template <class _Tp, class _Seq>
- bool operator<=(const stack<_Tp,_Seq>& __x, const stack<_Tp,_Seq>& __y)
- {
- return !(__y < __x);
- }
-
- template <class _Tp, class _Seq>
- bool operator>=(const stack<_Tp,_Seq>& __x, const stack<_Tp,_Seq>& __y)
- {
- return !(__x < __y);
- }
-
- } // namespace std
-
- #endif /* __GLIBCPP_INTERNAL_STACK_H */
-
- // Local Variables:
- // mode:C++
- // End:
-