Deprecation rewrite introduces infinite recursion… how to prevent that?

I have a double-dispatch chain:

x generic: y → y firstDispatch: x → x secondDispatchFromY: y

However this has been added after the fact, so there are direct uses of the secondDispatchFromY:  layer, which I'd like to deprecate/rewrite to use the generic: one. But if I do so, the intermediate firstDispatch: gets rewritten in the process, and this results in an infinite recursion.

Is there a way to formulate the rewrite rule to avoid that?

I could make a whole new set of secondDispatchFromYbis: methods, change the firstDispatch: ones to use those, and then the rewrite would be ok, but it seems like a lot of noise in the code for a small deprecation…

Thinking of it, this is not really a deprecation, more like an advice on proper use…

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Damien Pollet
type less, do more [ | ] http://people.untyped.org/damien.pollet