Expresion.h

// -*-c++-*-
//----------------------------------------------------------------------------
//  xc utils library; general purpose classes and functions.
//
//  Copyright (C)  Luis C. Pérez Tato
//
//  XC utils 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 3 of the License, or 
//  (at your option) any later version.
//
//  This software 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 program.
// If not, see <http://www.gnu.org/licenses/>.
//----------------------------------------------------------------------------
//Expresion.h

#ifndef EXPRESION_H
#define EXPRESION_H

#include "ExprBase.h"
#include <list>
#include "Segnal.h"
#include <iostream>

class Expresion: public ExprBase
  {
    typedef std::list<Segnal *> l_Expr;
    l_Expr lista; 
  protected:

    void borra_lista(void);
    void update_nueva_lista(void);

    virtual void Traduce(std::istream &is) = 0;
    void Traduce(const std::string &str);
  public:

    typedef l_Expr::const_iterator const_iterator_segnales;
    typedef l_Expr::iterator iterator_segnales;

    Expresion(void)
      : ExprBase(false), lista() {}
    Expresion(const Expresion &other)
      : ExprBase(other), lista(other.lista)
      { update_nueva_lista(); }
    Expresion &operator=(const Expresion &other)
      {
    ExprBase::operator=(other);
        borra_lista();
        lista=(other.lista);
        update_nueva_lista();
        return *this;
      }
    Expresion &operator=(const std::string &str)
      {
        Traduce(str);
        return *this;
      }
    bool Vacia(void) const
      { return lista.empty(); }
    bool Size(void) const
      { return lista.size(); }
    Expresion::l_Expr::const_iterator Begin(void) const
      { return lista.begin(); }
    Expresion::l_Expr::const_iterator End(void) const
      { return lista.end(); }

    void PonerDouble(const double &);
    void PonerSegnal(const Segnal *);

    bool Inicial(void);

    friend std::ostream &operator <<(std::ostream &stream,const Expresion &expr);
    friend std::istream &operator >>(std::istream &is, Expresion &e)
      {
        e.Traduce(is);
        return is;
      }
    virtual ~Expresion(void);
  };

#endif