// 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: