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GenericFunctions/KroneckerDelta.hh
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1 // -*- C++ -*-
2 // $Id: KroneckerDelta.hh,v 1.1 2007/01/21 20:54:33 boudreau Exp $
3 //---------------------Rectangular------------------------------------------//
4 // //
5 // Class KroneckerDelta by Joe Boudreau //
6 // //
7 //--------------------------------------------------------------------------//
8 #ifndef KroneckerDelta_h
9 #define KroneckerDelta_h 1
12 namespace Genfun {
13 
18  class KroneckerDelta : public AbsFunction {
19 
21 
22  public:
23 
24  // Constructor
26 
27  // Copy constructor
28  KroneckerDelta(const KroneckerDelta &right);
29 
30  // Destructor
31  virtual ~KroneckerDelta();
32 
33  // Retreive function value
34  virtual double operator ()(double argument) const;
35  virtual double operator ()(const Argument & a) const {return operator() (a[0]);}
36 
37  // Derivative.
38  Derivative partial (unsigned int) const;
39 
40  // Does this function have an analytic derivative?
41  virtual bool hasAnalyticDerivative() const {return true;}
42 
43  private:
44 
45  // It is illegal to assign an adjustable constant
46  const KroneckerDelta & operator=(const KroneckerDelta &right);
47 
48 
49  };
50 } // namespace Genfun
51 #endif
virtual bool hasAnalyticDerivative() const
#define FUNCTION_OBJECT_DEF(classname)
virtual double operator()(double argument) const
Derivative partial(unsigned int) const