CLHEP/GenericFunctions/ConstPlusFunction.hh

0001 // -*- C++ -*-
0002 // $Id: ConstPlusFunction.hh,v 1.2 2003/09/06 14:04:13 boudreau Exp $
0003 //--------------------------ConstPlusFunction-------------------------------//
0004 //                                                                          //
0005 // ConstPlusFunction, result of adding a function and a constant            //
0006 // Joe Boudreau, Petar Maksimovic, November 1999                            //
0007 //                                                                          //
0008 //--------------------------------------------------------------------------//
0009
0010 #ifndef ConstPlusFunction_h
0011 #define ConstPlusFunction_h 1
0012 #include "CLHEP/GenericFunctions/AbsFunction.hh"
0013
0014 namespace Genfun {
0015
0016   /**
0017    * @author
0018    * @ingroup genfun
0019    */
0020   class ConstPlusFunction : public AbsFunction  {
0021
0022     FUNCTION_OBJECT_DEF(ConstPlusFunction)
0023
0024       public:
0025
0026     // Constructor
0027     ConstPlusFunction(double constant, const AbsFunction *arg);
0028
0029     // Copy constructor
0030     ConstPlusFunction(const ConstPlusFunction &right);
0031
0032     // Destructor
0033     virtual ~ConstPlusFunction();
0034
0035     // Retreive function value
0036     virtual double operator ()(double argument) const override;
0037     virtual double operator ()(const Argument & argument) const override;
0038
0039     // Dimensionality
0040     virtual unsigned int dimensionality() const override;
0041
0042     // Derivative.
0043     Derivative partial (unsigned int) const override;
0044
0045     // Does this function have an analytic derivative?
0046     virtual bool hasAnalyticDerivative() const override {return true;}
0047
0048   private:
0049
0050     // It is illegal to assign a ConstPlusFunction
0051     const ConstPlusFunction & operator=(const ConstPlusFunction &right);
0052
0053     double             _constant;
0054     const AbsFunction *_arg;
0055   };
0056 } // namespace Genfun
0057 #endif