/usr/include/CLHEP/GenericFunctions/FunctionDirectProduct.hh is in libclhep-dev 2.1.4.1+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | // -*- C++ -*-
// $Id: FunctionDirectProduct.hh,v 1.2 2003/09/06 14:04:13 boudreau Exp $
//--------------------------FunctionDirectProduct---------------------------//
// //
// FunctionDirectProduct, result of multiplication of taking the direct //
// product of two functions: f(x)*g(y)= h(x,y). The direct product always //
// gives a function taking an argument of higher dimensionality than the //
// arguments. //
// //
// Joe Boudreau, Petar Maksimovic, November 1999 //
// //
//--------------------------------------------------------------------------//
#ifndef FunctionDirectProduct_h
#define FunctionDirectProduct_h 1
#include "CLHEP/GenericFunctions/AbsFunction.hh"
namespace Genfun {
/**
* @author
* @ingroup genfun
*/
class FunctionDirectProduct : public AbsFunction {
FUNCTION_OBJECT_DEF(FunctionDirectProduct)
public:
// Constructor
FunctionDirectProduct(const AbsFunction *arg1, const AbsFunction *arg2);
// Copy constructor
FunctionDirectProduct(const FunctionDirectProduct &right);
// Destructor
virtual ~FunctionDirectProduct();
// 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;
// Derivative.
Derivative partial (unsigned int) const;
// Does this function have an analytic derivative?
virtual bool hasAnalyticDerivative() const {return true;}
private:
// It is illegal to assign a FunctionDirectProduct
const FunctionDirectProduct & operator=(const FunctionDirectProduct &right);
AbsFunction *_arg1;
AbsFunction *_arg2;
unsigned int _m; // dimension of arg1
unsigned int _n; // dimension of arg2
};
} // namespace Genfun
#endif
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