CLHEP/GenericFunctions/FunctionTimesParameter.hh
// -*- C++ -*-
// $Id: FunctionTimesParameter.hh,v 1.2 2001/05/16 05:10:34 joeb Exp $
//--------------------------FunctionTimesParameter--------------------------//
// //
// ConstOverFunction, result of multiplying a function and a parameter //
// Joe Boudreau, Petar Maksimovic, November 1999 //
// //
//--------------------------------------------------------------------------//
#ifndef FunctionTimesParameter_h
#define FunctionTimesParameter_h 1
#include "CLHEP/GenericFunctions/AbsFunction.hh"
HEP_BEGIN_NAMESPACE(Genfun)
class FunctionTimesParameter : public AbsFunction {
FUNCTION_OBJECT_DEF(FunctionTimesParameter)
public:
// Constructor
FunctionTimesParameter(const AbsParameter *parameter, const AbsFunction *function);
// Copy constructor
FunctionTimesParameter(const FunctionTimesParameter &right);
// Destructor
virtual ~FunctionTimesParameter();
// 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 FunctionTimesParameter
const FunctionTimesParameter & operator=(const FunctionTimesParameter &right);
const AbsFunction *_function;
AbsParameter *_parameter;
};
HEP_END_NAMESPACE(Genfun)
#endif
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