Basically, when processing the import parameter list, it resolves everything but doesn't actually do it yet. Instead, it keeps a list of name=>ref pairs on a "worklist". Then, a callback is made that may alter this worklist, and finally the worklist is processed.

So, I have one place where things are added to the list, one place that traverses the list, and maybe places that look things up by name just for warning checking. It might get more later, such as the ability to remove items.

I'm leaning with chromatic for now, too. As long as I don't box myself into a corner, it should be easy to add later (as another named method) if needed.

—John