Function.hh

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#ifndef __DIADES__ALTARICA__FUNCTION__HH
#define __DIADES__ALTARICA__FUNCTION__HH


#include"Variable2.hh"


namespace Altarica
{
  class Function
  {
  private:
    vector<Variable> _param;
    Expression * _expression;
  public:
    bool eval(const vector<Value> & values,Value & result)
    {
      bool isOk = _param.size() == values.size();
      if(isOk)
        {
          vector<Variable>::size_type index = 0;
          while((index < _param.size())
                &&
                (isOk))
            {
              isOk = _param[index].setValue(values[index]);
              ++index;
            }
          if(isOk)
            {
              isOk = _expression->eval(result);
              if(!isOk)
                {
                  result = Value();
                }
            }
          else
            {
              result = Value();
            }
        }
      else
        {
          result = Value();
        }
      return isOk;
    }
  }
};


#endif