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CLHEP/GenericFunctions/Exponential.hh
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1 // -*- C++ -*-
2 // $Id: Exponential.hh,v 1.2 2003/09/06 14:04:13 boudreau Exp $
3 //---------------------Exponential------------------------------------------//
4 // //
5 // Class Exponential //
6 // Joe Boudreau, Petar Maksimovic, November 1999 //
7 // //
8 //--------------------------------------------------------------------------//
9 #ifndef Exponential_h
10 #define Exponential_h 1
13 
14 namespace Genfun {
15 
20  class Exponential : public AbsFunction {
21 
23 
24  public:
25 
26  // Constructor
27  Exponential();
28 
29  // Copy constructor
30  Exponential(const Exponential &right);
31 
32  // Destructor
33  virtual ~Exponential();
34 
35  // Retreive function value
36  virtual double operator ()(double argument) const;
37  virtual double operator ()(const Argument & a) const {return operator() (a[0]);}
38 
39  // Get the decay constant
41  const Parameter & decayConstant() const;
42 
43  // Derivative.
44  Derivative partial (unsigned int) const;
45 
46  // Does this function have an analytic derivative?
47  virtual bool hasAnalyticDerivative() const {return true;}
48 
49  private:
50 
51  // It is illegal to assign an adjustable constant
52  const Exponential & operator=(const Exponential &right);
53 
54  // Here is the decay constant
55  Parameter _decayConstant;
56 
57  };
58 } // namespace Genfun
59 #endif
virtual double operator()(double argument) const
Definition: Exponential.cc:23
#define FUNCTION_OBJECT_DEF(classname)
Parameter & decayConstant()
Definition: Exponential.cc:28
Derivative partial(unsigned int) const
Definition: Exponential.cc:37
virtual ~Exponential()
Definition: Exponential.cc:20