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GenericFunctions/FixedConstant.hh
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1// -*- C++ -*-
2// $Id: FixedConstant.hh,v 1.2 2003/09/06 14:04:13 boudreau Exp $
3//----------------------FixedConstant --------------------------------------//
4// //
5// Class FixedConstant //
6// Joe Boudreau, Petar Maksimovic, Nov. 1999 //
7// //
8// FixedConstant allows use to treat "promote" fixed contants to constant //
9// functions so that they automatically will inherit all the algebraic //
10// operations we have so painstakingly defined for functions. //
11// //
12//--------------------------------------------------------------------------//
13#ifndef FixedConstant_h
14#define FixedConstant_h 1
16
17namespace Genfun {
18
23 class FixedConstant : public AbsFunction {
24
25 FUNCTION_OBJECT_DEF(FixedConstant)
26
27 public:
28
29 // Constructor
30 FixedConstant(double value);
31
32 // Copy constructor
34
35 // Destructor
36 virtual ~FixedConstant();
37
38 // Retrieve function value
39 virtual double operator ()(double argument) const;
40 virtual double operator ()(const Argument & a) const {return operator() (a[0]);}
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 fixed constant
51 const FixedConstant & operator=(const FixedConstant &right);
52
53 // The value of the constant:
54 double _value;
55 };
56} // namespace Genfun
57#endif
#define FUNCTION_OBJECT_DEF(classname)
FixedConstant(const FixedConstant &right)
Derivative partial(unsigned int) const
FixedConstant(double value)
virtual double operator()(double argument) const