> I think it'd be a good idea to try to centralize this knowledge so that
> there are fewer places to change to add a new node type. For example,
> a routine that wants to examine all the Var nodes in a tree should be
> able to look something like this:
>
> if (IsA(node, Var))
> {
> process var node;
> }
> else
> standard_tree_walker(node, myself, ...);
>
> rather than having another copy of a bunch of error-prone boilerplate.
That is an interesting idea. The current code clearly needs cleanup and
is error-prone.
-- Bruce Momjian | http://www.op.net/~candle maillist@candle.pha.pa.us | (610)
853-3000+ If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill,
Pennsylvania19026
