CLHEP/GenericFunctions/FunctionDifference.hh

0001 // -*- C++ -*-
0002 // $Id: FunctionDifference.hh,v 1.2 2003/09/06 14:04:13 boudreau Exp $
0003 //--------------------------FunctionDifference------------------------------//
0004 //                                                                          //
0005 // FunctionDifference, result of subtraction of two functions               //
0006 // Joe Boudreau, Petar Maksimovic, November 1999                            //
0007 //                                                                          //
0008 //--------------------------------------------------------------------------//
0009
0010 #ifndef FunctionDifference_h
0011 #define FunctionDifference_h 1
0012 #include "CLHEP/GenericFunctions/AbsFunction.hh"
0013
0014 namespace Genfun {
0015
0016   /**
0017    * @author
0018    * @ingroup genfun
0019    */
0020   class FunctionDifference : public AbsFunction {
0021
0022     FUNCTION_OBJECT_DEF(FunctionDifference)
0023
0024       public:
0025
0026     // Constructor
0027     FunctionDifference(const AbsFunction* arg1, const AbsFunction *arg2);
0028
0029     // Copy constructor
0030     FunctionDifference(const FunctionDifference &right);
0031
0032     // Destructor
0033     virtual ~FunctionDifference();
0034
0035     // Retreive function value
0036     virtual double operator ()(double argument) const override;
0037     virtual double operator ()(const Argument & a) 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 FunctionDifference
0051     const FunctionDifference & operator=(const FunctionDifference &right);
0052
0053     const AbsFunction *_arg1;
0054     const AbsFunction *_arg2;
0055
0056   };
0057 } // namespace Genfun
0058 #endif