00001 // -*- C++ -*-
00002 // $Id: ACos.hh,v 1.2 2002/05/09 08:11:20 evc Exp $
00003 //---------------------ACos-------------------------------------------------//
00004 // //
00005 // Class ACos //
00006 // Joe Boudreau, Petar Maksimovic, November 1999 //
00007 // //
00008 //--------------------------------------------------------------------------//
00009 #ifndef ACos_h
00010 #define ACos_h 1
00011 #include "CLHEP/GenericFunctions/AbsFunction.hh"
00012
00013 namespace Genfun {
00014
00015 class ACos : public AbsFunction {
00016
00017 FUNCTION_OBJECT_DEF(ACos)
00018
00019 public:
00020
00021 // Constructor
00022 ACos();
00023
00024 // Destructor
00025 virtual ~ACos();
00026
00027 // Copy constructor
00028 ACos(const ACos &right);
00029
00030 // Retreive function value
00031 virtual double operator ()(double argument) const;
00032 virtual double operator ()(const Argument & a) const {return operator() (a[0]);}
00033
00034 // Derivative.
00035 Derivative partial (unsigned int) const;
00036
00037 // Does this function have an analytic derivative?
00038 virtual bool hasAnalyticDerivative() const {return true;}
00039
00040 private:
00041
00042 // It is illegal to assign a ACosine
00043 const ACos & operator=(const ACos &right);
00044
00045 };
00046
00047 } // end namespace Genfun
00048
00049 #endif