// This may look like C code, but it is really -*- C++ -*-
/* 
Copyright (C) 1988 Free Software Foundation
    written by Doug Lea (dl@rocky.oswego.edu)

This file is part of the GNU C++ Library.  This library is free
software; you can redistribute it and/or modify it under the terms of
the GNU Library General Public License as published by the Free
Software Foundation; either version 2 of the License, 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/


#ifndef _<T>SLStack_h
#ifdef __GNUG__
#pragma interface
#endif
#define _<T>SLStack_h 1

#include "<T>.SLList.h"
#include "<T>.Stack.h"

class <T>SLStack : public <T>Stack
{
  <T>SLList     p;

public:
                <T>SLStack();
                <T>SLStack(const <T>SLStack& s);
                ~<T>SLStack();

  void          operator = (const <T>SLStack&);

  void          push(<T&> item);
  <T>           pop();
  <T>&          top();               
  void          del_top();

  int           empty();
  int           full();
  int           length();

  void          clear();

  int           OK();

};

inline <T>SLStack::<T>SLStack() :p() {}
inline <T>SLStack::<T>SLStack(const <T>SLStack& a) : p(a.p) {}
inline <T>SLStack::~<T>SLStack() {}

inline void <T>SLStack::push(<T&> item)
{
  p.prepend(item);
}

inline <T> <T>SLStack::pop()
{
  return p.remove_front();
}

inline <T>& <T>SLStack::top()
{
  return p.front();
}

inline void <T>SLStack::del_top()
{
  p.del_front();
}

inline void <T>SLStack::operator =(const <T>SLStack& s)
{
  p = s.p;
}

inline int <T>SLStack::empty() 
{
  return p.empty();
}

inline int <T>SLStack::full() 
{
  return 0;
}

inline int <T>SLStack::length() 
{
  return p.length();
}

inline int <T>SLStack::OK() 
{
  return p.OK();
}

inline void <T>SLStack::clear() 
{
  p.clear();
}

#endif