Re: [HACKERS] It would be nice if this could be fixed...

> 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.

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