CLHEP/GenericFunctions/ConstTimesFunction.hh

0001 // -*- C++ -*-
0002 // $Id: ConstTimesFunction.hh,v 1.2 2003/09/06 14:04:13 boudreau Exp $
0003 //--------------------------ConstOverFunction-------------------------------//
0004 //                                                                          //
0005 // ConstOverFunction, result of multiplying a constant and a function       //
0006 // Joe Boudreau, Petar Maksimovic, November 1999                            //
0007 //                                                                          //
0008 //--------------------------------------------------------------------------//
0009
0010 #ifndef ConstTimesFunction_h
0011 #define ConstTimesFunction_h 1
0012 #include "CLHEP/GenericFunctions/AbsFunction.hh"
0013 namespace Genfun {
0014
0015   /**
0016    * @author
0017    * @ingroup genfun
0018    */
0019   class ConstTimesFunction : public AbsFunction  {
0020
0021     FUNCTION_OBJECT_DEF(ConstTimesFunction)
0022
0023       public:
0024
0025     // Constructor
0026     ConstTimesFunction(double constant, const AbsFunction *arg);
0027
0028     // Copy constructor
0029     ConstTimesFunction(const ConstTimesFunction &right);
0030
0031     // Destructor
0032     virtual ~ConstTimesFunction();
0033
0034     // Retreive function value
0035     virtual double operator ()(double argument) const override;
0036     virtual double operator ()(const Argument & a) const override;
0037
0038     // Dimensionality
0039     virtual unsigned int dimensionality() const override;
0040
0041     // Derivative.
0042     Derivative partial (unsigned int) const override;
0043
0044     // Does this function have an analytic derivative?
0045     virtual bool hasAnalyticDerivative() const override {return true;}
0046
0047   private:
0048
0049     // It is illegal to assign a ConstTimesFunction
0050     const ConstTimesFunction & operator=(const ConstTimesFunction &right);
0051
0052     double             _constant;
0053     const AbsFunction *_arg;
0054   };
0055 } // namespace Genfun
0056 #endif