private int Compare(IElement e1, IElement e2)
{
IOrderedSet S2 = e2.AssociatedSet as IOrderedSet;
if (!(e1.AssociatedSet is IOrderedSet S1) || S2 is null || S1 != S2)
{
throw new ScriptRuntimeException("Cannot order elements.", this);
}
return(S1.Compare(e1, e2));
}
private int Compare(IElement e1, IElement e2)
{
if (e1.AssociatedSet is IOrderedSet S1 && e2.AssociatedSet is IOrderedSet S2 && S1 == S2)
{
return(S1.Compare(e1, e2));
}