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GenericFunctions/FunctionDifference.hh
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1 // -*- C++ -*-
2 // $Id: FunctionDifference.hh,v 1.2 2003/09/06 14:04:13 boudreau Exp $
3 //--------------------------FunctionDifference------------------------------//
4 // //
5 // FunctionDifference, result of subtraction of two functions //
6 // Joe Boudreau, Petar Maksimovic, November 1999 //
7 // //
8 //--------------------------------------------------------------------------//
9 
10 #ifndef FunctionDifference_h
11 #define FunctionDifference_h 1
13 
14 namespace Genfun {
15 
20  class FunctionDifference : public AbsFunction {
21 
23 
24  public:
25 
26  // Constructor
27  FunctionDifference(const AbsFunction* arg1, const AbsFunction *arg2);
28 
29  // Copy constructor
31 
32  // Destructor
33  virtual ~FunctionDifference();
34 
35  // Retreive function value
36  virtual double operator ()(double argument) const;
37  virtual double operator ()(const Argument & a) const;
38 
39  // Dimensionality
40  virtual unsigned int dimensionality() const;
41 
42  // Derivative.
43  Derivative partial (unsigned int) const;
44 
45  // Does this function have an analytic derivative?
46  virtual bool hasAnalyticDerivative() const {return true;}
47 
48  private:
49 
50  // It is illegal to assign a FunctionDifference
51  const FunctionDifference & operator=(const FunctionDifference &right);
52 
53  const AbsFunction *_arg1;
54  const AbsFunction *_arg2;
55 
56  };
57 } // namespace Genfun
58 #endif
Derivative partial(unsigned int) const
#define FUNCTION_OBJECT_DEF(classname)
FunctionDifference(const AbsFunction *arg1, const AbsFunction *arg2)
virtual unsigned int dimensionality() const