/usr/include/CLHEP/GenericFunctions/SymToArgAdaptor.hh is in libclhep-dev 2.1.2.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// $Id:
//-----------------------Class ParaToArgAdaptor-----------------------------//
// //
// Joe Boudreau //
// June 2004 //
// //
// The purpose of this adaptor is to be able to create, starting FROM //
// a function F of several variables and controlled by several parameters: //
// //
// F(alpha, beta, gamma....; x, y, z) //
// //
// a new function of several variables in which the parameter values are //
// set by some of the variables. Application: event-per-event errors. //
// //
// Arguments to the adaptor: //
// 1) The original generic function to adapt. //
// 2) The symbolic expression to apply it to. //
// 3) The name of a parameter to tweak. //
// 4) The symbolic expression to tweak it with //
// //
//--------------------------------------------------------------------------//
#ifndef _SYMTOARGADAPTOR_
#define _SYMTOARGADAPTOR_
#include <functional>
#include <iostream>
#include <string>
#include "CLHEP/GenericFunctions/Parameter.hh"
#include "CLHEP/GenericFunctions/AbsFunction.hh"
namespace Genfun {
template <class F>
class SymToArgAdaptor : public AbsFunction {
FUNCTION_OBJECT_DEF(SymToArgAdaptor)
public:
// ScopedMethodName
typedef Parameter & (F::*ScopedMethodPtr) ();
// Constructor
SymToArgAdaptor( F & function, // A function.
const AbsFunction & f_expression, // An expression to apply it to
ScopedMethodPtr parameterFetchMethod, // A parameter.
const AbsFunction * p_expression); // An expression for the parameter
// Copy constructor
SymToArgAdaptor(const SymToArgAdaptor &right);
// Destructor
virtual ~SymToArgAdaptor();
// 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;
private:
// It is illegal to assign an adjustable constant
const SymToArgAdaptor & operator=(const SymToArgAdaptor &right);
// Here is the function being adapted;
F *_function;
// A Variable (int an argument) to which the function is going to apply:
const AbsFunction *_f_expression;
// Here is the recipe for fetching the parameter from the function:
std::mem_fun_ref_t<Parameter &, F> _parameterFetchMethod;
// Here is the symbol to be connect to the parameter:
const AbsFunction *_p_expression;
};
} // namespace Genfun
#include "CLHEP/GenericFunctions/SymToArgAdaptor.icc"
#endif
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