/// <summary>
/// Finds the first scoped variable matching the name, using Rule as the current rule to work backwards from
/// </summary>
public Rule FindVariable(string name, Node rule)
{
var previousNode = rule;
foreach (var frame in Frames)
{
var v = frame.Variable(name, null);
if (v)
{
return(v);
}
previousNode = frame;
}
Rule result = null;
if (Parent != null)
{
result = Parent.FindVariable(name, rule);
}
if (result != null)
{
return(result);
}
if (ClosureEnvironment != null)
{
return(ClosureEnvironment.FindVariable(name, rule));
}
return(null);
}
