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// This file is part of ff3d - http://www.freefem.org/ff3d
// Copyright (C) 2001, 2002, 2003 Stphane 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 1.20 2007/04/01 23:46:41 delpinux Exp $
#ifndef FUNCTION_EXPRESSION_HPP
#define FUNCTION_EXPRESSION_HPP
#include <Expression.hpp>
#include <ReferenceCounting.hpp>
#include <iostream>
class ScalarFunctionBase;
/**
* @file FunctionExpression.hpp
* @author Stephane Del Pino
* @date Tue Jul 4 01:05:53 2006
*
* @brief Function expression base class
*
*/
class FunctionExpression
: public Expression
{
public:
/// functions types ids
enum FunctionType {
constant,
linearBase,
normalComponent,
fem,
spectral,
derivative,
meshReferences,
composed,
variable,
cfunction,
binaryOperation,
unaryMinus,
convection,
objectCharacteristic,
meshCharacteristic,
domainCharacteristic,
read,
functionValue,
not_,
integrate
};
private:
const FunctionType __type; /**< Type of function */
bool __unknown; /**< is true if the function is unknown */
protected:
ConstReferenceCounting<ScalarFunctionBase> __scalarFunction; /**< The function associated to the expression */
/**
* Specialization of the put function
*
* @param os the stream
*
* @return the stream @a os
*/
virtual std::ostream& put(std::ostream& os) const;
public:
/**
* Returns @b true if the functions has a boundary
*
* @return false as a default value
*/
virtual bool hasBoundaryExpression() const;
/**
* Read only access to the type of the function
*
* @return __type
*/
const FunctionExpression::FunctionType& type() const;
/**
* Access to the scalar function
*
* @return __scalarFunction
*/
ConstReferenceCounting<ScalarFunctionBase> function() const;
/**
* Access the value of the function expression
*
* @return a FunctionExpressionValue
*/
ReferenceCounting<FunctionExpression> value();
/**
* Copy constructor
*
* @param e the original function expression
*
*/
FunctionExpression(const FunctionExpression& e);
/**
* Builds a function expression of type @a type
*
* @param type the type of the function expression
*
*/
FunctionExpression(const FunctionExpression::FunctionType& type);
/**
* Destructor
*
*/
virtual ~FunctionExpression();
};
#endif // FUNCTION_EXPRESSION_HPP
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