Zompist Bboard Again

bradrn wrote: if a rule acts on all stops plus /s/, you can’t write [+stop s] directly.

But really, those are just workarounds. I know of no sound change applier in which one can directly specify, for instance, ‘apply this rule if there are any nasals in the word’, or ‘move each tone one syllable to the right’. Sometimes these can be simulated via indirect means, but it’s complicated ...