// Evaluate and return the value of the part of an expression that this instance represents
public object GetValue()
{
if (EvalDlg != null)
{
EvalDlg();
}
if (SpecialValue != null)
{
if (string.IsNullOrEmpty(Suffix))
{
return(SpecialValue.ToString());
}
else
{
return(SpecialValue.GetSuffix(Suffix));
}
}
if (LeftSide == null)
{
if (Variable != null && !IsStatic)
{
return(Variable.Value);
}
else
{
return(Value);
}
}
else
{
if (Operator == "AND")
{
return(LeftSide.Bool() && RightSide.Bool());
}
if (Operator == "OR")
{
return(LeftSide.Bool() || RightSide.Bool());
}
if (LeftSide.Value is String || RightSide.Value is String)
{
if (Operator == "+")
{
return(LeftSide.Value.ToString() + RightSide.Value.ToString());
}
if (Operator == "==")
{
return(LeftSide.Value.ToString() == RightSide.Value.ToString());
}
if (Operator == "=")
{
return(LeftSide.Value.ToString() == RightSide.Value.ToString());
}
if (Operator == "!=")
{
return(LeftSide.Value.ToString() != RightSide.Value.ToString());
}
}
if (LeftSide.Value is float || RightSide.Value is float)
{
if (Operator == "+")
{
return(LeftSide.Float() + RightSide.Float());
}
if (Operator == "-")
{
return(LeftSide.Float() - RightSide.Float());
}
if (Operator == "/")
{
return(LeftSide.Float() / RightSide.Float());
}
if (Operator == "*")
{
return(LeftSide.Float() * RightSide.Float());
}
if (Operator == "^")
{
return((float)Math.Pow(LeftSide.Double(), RightSide.Double()));
}
if (Operator == "<")
{
return(LeftSide.Float() < RightSide.Float());
}
if (Operator == ">")
{
return(LeftSide.Float() > RightSide.Float());
}
if (Operator == "<=")
{
return(LeftSide.Float() <= RightSide.Float());
}
if (Operator == ">=")
{
return(LeftSide.Float() >= RightSide.Float());
}
if (Operator == "==")
{
return(LeftSide.Float() == RightSide.Float());
}
if (Operator == "=")
{
return(LeftSide.Float() == RightSide.Float());
}
if (Operator == "!=")
{
return(LeftSide.Float() != RightSide.Float());
}
}
if (LeftSide.Value is Direction && RightSide.Value is Direction)
{
if (Operator == "*")
{
return((Direction)LeftSide.GetValue() * (Direction)RightSide.GetValue());
}
if (Operator == "+")
{
return((Direction)LeftSide.GetValue() + (Direction)RightSide.GetValue());
}
if (Operator == "-")
{
return((Direction)LeftSide.GetValue() + (Direction)RightSide.GetValue());
}
}
}
throw new kOSException("Expression error.");
}