Function.h

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#ifndef _utl_Function_h_
#define _utl_Function_h_

#include <string>
#include <vector>

#include <utl/SymbolTable.h>
#include <utl/MathExpressionGrammar.h>
#include <utl/ExpressionParser.h>
#include <utl/AugerUnits.h>

#include <utl/Branch.h>


namespace utl {

  class Function {
  public:
    Function() {}
    Function(const std::string& function, const std::vector<std::string>& vars);
    Function(const std::string& function, const std::string& var);
    
    const std::string& GetFunction() const { return fFunction; }
    
    utl::SymbolTable& GetVariables() { return fFunc.GetVariables(); }
    const utl::SymbolTable& GetVariables() const { return fFunc.GetVariables(); }
    
    double operator()() const { return fFunc.Evaluate(fFunction); } // for convenience and special use
    double operator()(const double& var) const;
    double operator()(const std::vector<double>& vars) const;
    
   
    //friend class utl::Branch; // only Branch is allowed to call default ctor

  private:
      std::string fFunction;
      std::vector<std::string> fVariableNames;
      //  mutable SymbolTable *fVariables;
      mutable FunctionParser fFunc;
  };

}


#endif