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GenericFunctions/Power.hh
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1 // -*- C++ -*-
2 // $Id: Power.hh,v 1.2 2003/09/06 14:04:13 boudreau Exp $
3 //----------------------Power-----------------------------------------------//
4 // //
5 // Class Power //
6 // Joe Boudreau, Petar Maksimovic, Nov. 1999 //
7 // //
8 // Power(x) returns x^n //
9 //--------------------------------------------------------------------------//
10 #ifndef Power_h
11 #define Power_h 1
13 namespace Genfun {
14 
19  class Power : public AbsFunction {
20 
22 
23  public:
24 
25  // Constructor
26  Power(double n);
27  Power(int n);
28  Power(unsigned int n);
29 
30  // Copy constructor
31  Power(const Power &right);
32 
33  // Destructor
34  virtual ~Power();
35 
36  // Retrieve function value
37 
38  virtual double operator ()(double argument) const;
39  virtual double operator ()(const Argument & a) const {return operator() (a[0]);}
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 fixed constant
50  const Power & operator=(const Power &right);
51 
52  double _doublePower; // power (as a double)
53  int _intPower; // power (as an integer)
54  bool _asInteger; // flag: object constructed with integer argument
55 
56  };
57 } // namespace Genfun
58 #endif
#define FUNCTION_OBJECT_DEF(classname)
virtual double operator()(double argument) const
Definition: Power.cc:34
virtual bool hasAnalyticDerivative() const
Power(double n)
Definition: Power.cc:19
Derivative partial(unsigned int) const
Definition: Power.cc:62