parsedFunction.h

// -*- Mode: C++; tab-width: 2; -*-
// vi: set ts=2:
//
// $Id: parsedFunction.h,v 1.9 2003/12/19 14:54:08 anne Exp $
//

#ifndef BALL_MATHS_PARSEDFUNCTION_H
#define BALL_MATHS_PARSEDFUNCTION_H

#ifndef BALL_DATATYPE_STRINGHASHMAP_H
# include <BALL/DATATYPE/stringHashMap.h>
#endif

#include <numeric>

using std::unary_function;

namespace BALL
{
  extern StringHashMap<double*> *ParsedFunctionConstants;
  extern StringHashMap<double (*)(double)> *ParsedFunctionFunctions;
  
  template <typename arg> 
  class ParsedFunction 
    : public unary_function<arg, double> 
  {
    public:
  
      ParsedFunction();
  
      ParsedFunction(const String& expression);
      
      ParsedFunction(const ParsedFunction& func);
      
      ~ParsedFunction();
      
      
      double operator () (arg p) throw(Exception::ParseError);
    

      void initTable();
  
      StringHashMap<double*> constants_;
  
      StringHashMap<double (*)(double)> functions_;
    
    protected:
      String expression_;
  };
}

#endif // BALL_MATHS_PARSEDFUNCTION_H

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