Ah, right, nice. In the meantime I found that a past version of me knew that there is some kind of #map() for tuples, but since I never could put it to good use, it slipped from my radar.
Just to note, depending on compiler settings (and Scala version?), it should be a.asMatchable match ....
Not sure if there’s any sane way to put plain functions for uniform tuples on top of this mechanism to make this a match for the DSL use case. But the OP seems to be happy with lists, anyway…