include/stack

// -*- C++ -*-
/***************************************************************************
 *
 * stack - Declaration of the C++ Standard Library stack class template
 *
 * $Id: //stdlib/dev/include/stack#13 $
 *
 ***************************************************************************
 *
 * 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) 1994-2005 Quovadx,  Inc., acting through its  Rogue Wave
 * Software division. Licensed under the Apache License, Version 2.0 (the
 * "License");  you may  not use this file except  in compliance with the
 * License.    You    may   obtain   a   copy   of    the   License    at
 * http://www.apache.org/licenses/LICENSE-2.0.    Unless   required    by
 * applicable law  or agreed to  in writing,  software  distributed under
 * the License is distributed on an "AS IS" BASIS,  WITHOUT WARRANTIES OR
 * CONDITIONS OF  ANY KIND, either  express or implied.  See  the License
 * for the specific language governing permissions  and limitations under
 * the License.
 * 
 **************************************************************************/

#ifndef _RWSTD_STACK_INCLUDED
#define _RWSTD_STACK_INCLUDED

#include <deque>
#include <rw/_defs.h>


_RWSTD_NAMESPACE (std) { 


template <class _TypeT,
          class _Container _RWSTD_COMPLEX_DEFAULT (deque<_TypeT>) > 
class stack;


template <class _TypeT, class _Container>
inline bool operator==(const stack<_TypeT, _Container>&, 
                       const stack<_TypeT, _Container>&);

template <class _TypeT, class _Container>
inline bool operator<(const stack<_TypeT, _Container>&, 
                      const stack<_TypeT, _Container>&);

template <class _TypeT, class _Container>
class stack
{
    friend bool _RWSTD_SPECIALIZED_FRIEND (operator==)
        (const stack&, const stack&);

    friend bool _RWSTD_SPECIALIZED_FRIEND (operator<)
        (const stack&, const stack&);

public:
    
    typedef _Container                                container_type;
    typedef _TYPENAME container_type::value_type      value_type;
    typedef _TYPENAME container_type::size_type       size_type;
    // lwg issue 307: additional typedefs
    typedef _TYPENAME container_type::reference       reference;
    typedef _TYPENAME container_type::const_reference const_reference;

protected:
    
    container_type c;

public:

    _EXPLICIT
    stack (const container_type &__c = container_type ()) 
        : c (__c) { }

    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 _TypeT, class _Container>
inline bool operator== (const stack<_TypeT, _Container> &__x, 
                        const stack<_TypeT, _Container> &__y)
{
    return __x.c == __y.c;
}

template <class _TypeT, class _Container>
inline bool operator< (const stack<_TypeT, _Container> &__x, 
                       const stack<_TypeT, _Container> &__y)
{
    return __x.c < __y.c;
}

template <class _TypeT, class _Container>
inline bool operator!= (const stack<_TypeT, _Container> &__x, 
                        const stack<_TypeT, _Container> &__y)
{
    return !(__x == __y);
}

template <class _TypeT, class _Container>
inline bool operator> (const stack<_TypeT, _Container> &__x, 
                       const stack<_TypeT, _Container> &__y)
{
    return __y < __x;
}

template <class _TypeT, class _Container>
inline bool operator>= (const stack<_TypeT, _Container> &__x, 
                        const stack<_TypeT, _Container> &__y)
{
    return !(__x < __y);
}

template <class _TypeT, class _Container>
inline bool operator<= (const stack<_TypeT, _Container> &__x, 
                        const stack<_TypeT, _Container> &__y)
{
    return !(__y <  __x);
}


}   // namespace std

#endif   // _RWSTD_STACK_INCLUDED