FunctionExpression.hpp

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//  This file is part of ff3d - http://www.freefem.org/ff3d
//  Copyright (C) 2001, 2002, 2003 Stéphane Del Pino

//  This program 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 program 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, write to the Free Software Foundation,
//  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  

//  $Id: FunctionExpression.hpp,v 1.21 2008/01/31 21:38:16 delpinux Exp $

#ifndef FUNCTION_EXPRESSION_HPP
#define FUNCTION_EXPRESSION_HPP

#include <Expression.hpp>
#include <ReferenceCounting.hpp>

#include <iostream>

class ScalarFunctionBase;
class FunctionExpression
  : public Expression
{
public:
  enum FunctionType {
    constant,
    linearBase,
    normalComponent,
    fem,
    dg,
    spectral,
    derivative,
    meshReferences,
    composed,
    variable,
    cfunction,
    binaryOperation,
    unaryMinus,
    convection,

    objectCharacteristic,
    meshCharacteristic,
    domainCharacteristic,

    read,
    functionValue,
    not_,
    integrate
  };
private:
  const FunctionType __type;    
  bool __unknown;               
protected:
  ConstReferenceCounting<ScalarFunctionBase> __scalarFunction; 
  virtual std::ostream& put(std::ostream& os) const;

public:
  virtual bool hasBoundaryExpression() const;

  const FunctionExpression::FunctionType& type() const;

  ConstReferenceCounting<ScalarFunctionBase> function() const;

  ReferenceCounting<FunctionExpression> value();

  FunctionExpression(const FunctionExpression& e);

  FunctionExpression(const FunctionExpression::FunctionType& type);

  virtual ~FunctionExpression();
};

#endif // FUNCTION_EXPRESSION_HPP

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