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GenericFunctions/FunctionNegation.hh
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1 // -*- C++ -*-
2 // $Id: FunctionNegation.hh,v 1.2 2003/09/06 14:04:13 boudreau Exp $
3 //--------------------------FunctionNegation--------------------------------//
4 // //
5 // Class FunctionNegation, output of the unary - operator //
6 // Joe Boudreau, Petar Maksimovic, November 1999 //
7 // //
8 //--------------------------------------------------------------------------//
9 #ifndef FunctionNegation_h
10 #define FunctionNegation_h 1
12 
13 namespace Genfun {
14 
19  class FunctionNegation : public AbsFunction {
20 
22 
23  public:
24 
25  // Constructor
26  FunctionNegation(const AbsFunction *arg1);
27 
28  // Copy constructor.
29  FunctionNegation(const FunctionNegation &right);
30 
31  // Destructor
32  virtual ~FunctionNegation();
33 
34  // Retreive function value
35  virtual double operator ()(double argument) const;
36  virtual double operator ()(const Argument & a) const;
37 
38  // Dimensionality
39  virtual unsigned int dimensionality() const;
40 
41  // Derivative.
42  Derivative partial (unsigned int) const;
43 
44  // Does this function have an analytic derivative?
45  virtual bool hasAnalyticDerivative() const {return true;}
46 
47  private:
48 
49  // It is illegal to assign a FunctionNegation
50  const FunctionNegation & operator=(const FunctionNegation &right);
51 
52  // The function we're negating.
53  const AbsFunction *_arg1;
54  };
55 } // namespace Genfun
56 #endif