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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:
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