CLHEP/GenericFunctions/Theta.hh

0001 // -*- C++ -*-
0002 // $Id:
0003 //---------------------Theta------------------------------------------------//
0004 //                                                                          //
0005 // Class Theta                                                              //
0006 // Joe Boudreau, Petar Maksimovic, November 1999                            //
0007 //                                                                          //
0008 //--------------------------------------------------------------------------//
0009 #ifndef Theta_h
0010 #define Theta_h 1
0011 #include "CLHEP/GenericFunctions/AbsFunction.hh"
0012 namespace Genfun {
0013
0014   /**
0015    * @author
0016    * @ingroup genfun
0017    */
0018   class Theta : public AbsFunction  {
0019
0020     FUNCTION_OBJECT_DEF(Theta)
0021
0022       public:
0023
0024     // Constructor
0025     Theta();
0026
0027     // Destructor
0028     virtual ~Theta();
0029
0030     // Copy constructor
0031     Theta(const Theta &right);
0032
0033     // Retreive function value
0034     virtual double operator ()(double argument) const override;
0035     virtual double operator ()(const Argument & a) const override {return operator() (a[0]);}
0036
0037     // Derivative.
0038     Derivative partial (unsigned int) const override;
0039
0040     // Does this function have an analytic derivative?
0041     virtual bool hasAnalyticDerivative() const override {return true;}
0042
0043
0044   private:
0045
0046     // It is illegal to assign a Theta
0047     const Theta & operator=(const Theta &right);
0048
0049   };
0050 } // namespace Genfun
0051
0052 #endif