CLHEP/GenericFunctions/FunctionDifference.hh
// -*- C++ -*-
// $Id: FunctionDifference.hh,v 1.2 2001/05/16 05:10:33 joeb Exp $
//--------------------------FunctionDifference------------------------------//
// //
// FunctionDifference, result of subtraction of two functions //
// Joe Boudreau, Petar Maksimovic, November 1999 //
// //
//--------------------------------------------------------------------------//
#ifndef FunctionDifference_h
#define FunctionDifference_h 1
#include "CLHEP/GenericFunctions/AbsFunction.hh"
HEP_BEGIN_NAMESPACE(Genfun)
class FunctionDifference : public AbsFunction {
FUNCTION_OBJECT_DEF(FunctionDifference)
public:
// Constructor
FunctionDifference(const AbsFunction* arg1, const AbsFunction *arg2);
// Copy constructor
FunctionDifference(const FunctionDifference &right);
// Destructor
virtual ~FunctionDifference();
// Retreive function value
virtual double operator ()(double argument) const;
virtual double operator ()(const Argument & a) const;
// Dimensionality
virtual unsigned int dimensionality() const;
// Derivative.
Derivative partial (unsigned int) const;
// Does this function have an analytic derivative?
virtual bool hasAnalyticDerivative() const {return true;}
private:
// It is illegal to assign a FunctionDifference
const FunctionDifference & operator=(const FunctionDifference &right);
const AbsFunction *_arg1;
const AbsFunction *_arg2;
};
HEP_END_NAMESPACE(Genfun)
#endif
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