private object Eval(TerminalNodeImpl arg)
{
if (arg.Symbol.Type == STRING)
{
return(arg.ToString());
}
if (arg.Symbol.Type == NUMBER)
{
return(arg.ToString());
}
if (arg.Symbol.Type == VARIABLE)
{
return(ENVIRONMENT[arg.ToString()]);
}
if (arg.Symbol.Type == BOOL_TRUE)
{
return(true);
}
if (arg.Symbol.Type == VARIABLE)
{
return(false);
}
throw new ChildLangRuntimeException();
}
private double GetDoubleValue(TerminalNodeImpl t)
{
if (t.Symbol.Type == VARIABLE)
{
return(Convert.ToDouble(ENVIRONMENT[t.ToString()]));
}
return(double.Parse(t.GetText()));
}
private string GetTerminalString(TerminalNodeImpl t)
{
if (t.Symbol.Type == VARIABLE)
{
return(ENVIRONMENT[t.ToString()].ToString());
}
if (t.Symbol.Type == NUMBER)
{
return(t.GetText());
}
throw new ChildLangRuntimeException();
}