CLHEP/GenericFunctions/DoubleParamToArgAdaptor.hh
// -*- C++ -*-
// $Id: DoubleParamToArgAdaptor.hh,v 1.2 2001/06/18 13:53:10 evc Exp $
//-----------------------Class ParaToArgAdaptor-----------------------------//
// //
// Joe Boudreau //
// January 2000 //
// //
// This class changes the interpretation of two PARAMETERs to a function //
// connects them to a single argument, with scale factors controlling how //
// the argument is increased before it is used to adjust the parameter. //
// In other words it makes a function like //
// //
// F(a_0, a_1, a_2; x) //
// //
// and reinterprets it as //
// //
// F(a_0; x, a_1) //
// //
// //
//--------------------------------------------------------------------------//
#ifndef DoubleParamToArgAdaptor_h_
#define DoubleParamToArgAdaptor_h_
#include <functional>
#include "CLHEP/config/CLHEP.h"
#include "CLHEP/config/iostream.h"
#include <string>
#include "CLHEP/GenericFunctions/Parameter.hh"
#include "CLHEP/GenericFunctions/AbsFunction.hh"
HEP_BEGIN_NAMESPACE(Genfun)
template <class F>
class DoubleParamToArgAdaptor : public AbsFunction {
FUNCTION_OBJECT_DEF(DoubleParamToArgAdaptor)
public:
// ScopedMethodName
typedef Parameter & (F::*ScopedMethodPtr) ();
// Constructor
DoubleParamToArgAdaptor(const F & function,
ScopedMethodPtr parameterFetchMethod0,
ScopedMethodPtr paraemterFetchMethod1);
// Copy constructor
DoubleParamToArgAdaptor(const DoubleParamToArgAdaptor &right);
// Destructor
virtual ~DoubleParamToArgAdaptor();
// Retreive function value
virtual double operator ()(double argument) const; // Gives an error.
virtual double operator ()(const Argument & a) const; // Must use this one
// Dimensionality
virtual unsigned int dimensionality() const;
// Get the mean of the DoubleParamToArgAdaptor
Parameter & scaleFactor0();
const Parameter & scaleFactor0() const;
// Get the mean of the DoubleParamToArgAdaptor
Parameter & scaleFactor1();
const Parameter & scaleFactor1() const;
private:
// It is illegal to assign an adjustable constant
const DoubleParamToArgAdaptor & operator=(const DoubleParamToArgAdaptor &right);
// Here is the scale:
Parameter _scaleFactor0;
Parameter _scaleFactor1;
// Here is the function being adapted;
F *_function;
// Here is the recipe for fetching the parameter from the function:
std::mem_fun_ref_t<Parameter &, F> _parameterFetchMethod0;
std::mem_fun_ref_t<Parameter &, F> _parameterFetchMethod1;
};
HEP_END_NAMESPACE(Genfun)
#include "CLHEP/GenericFunctions/DoubleParamToArgAdaptor.icc"
#endif
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