public object Visit(ASTVarNode node, object data)
{
Variable var = node.Var;
if (var == null)
{
throw new EvaluationException("var was null in StandardEvaluator");
}
object item = var.Value;
if (this._trapNullValues && (item == null))
{
throw new EvaluationException("Could not evaluate " + node.GetName() + ": no value set for the variable.");
}
if (this._trapNaN && (((item is double) && double.IsNaN((double)item)) || ((item is float) && float.IsNaN((float)item))))
{
throw new EvaluationException("NaN value detected for variable " + node.GetName());
}
if (this._trapInfinity && (((item is double) && double.IsInfinity((double)item)) || ((item is float) && float.IsInfinity((float)item))))
{
throw new EvaluationException("Infinite value " + item.ToString() + "detected for variable " + node.GetName());
}
this.stack.Push(item);
return(data);
}
protected double VisitVariable(ASTVarNode node)
{
object o = node.Var.Value;
if (o == null)
{
throw new EvaluationException("Variable " + node.GetName() + " has a null value");
}
return(FromObject(o));
}
public virtual object Visit(ASTVarNode node, object data)
{
this.sb.Append(node.GetName());
return(data);
}
