Am Dienstag, den 01.09.2020, 10:11 +0200 schrieb Sebastian Graf:
2.) Another scenario that I'd really love to see supported with COMPLETE pragmas is a way to use | notation with them like you can with MINIMAL pragmas.
(2) is a neat idea, but requires a GHC proposal I'm not currently willing to get into. I can also see a design discussion around allowing arbitrary "formulas" (e.g., not only what is effectively CNF).
A big bonus of your design is that it's really easy to integrate into the current implementation, which is what I'd gladly do in case such a proposal would get accepted.
in the original ticket where a COMPLETE pragma was suggested ( https://gitlab.haskell.org/ghc/ghc/-/issues/8779) the ability to specify arbitrary boolean formulas was already present: “So here is what I think might work well, inspired by the new MINIMAL pragma: … The syntax is essentially the same as for MINIMAL, i.e. a boolean formula, with constructors and pattern synonyms as atoms. In this case” So one _could_ say that this doesn’t need a proposal, because it would just be the implementation finishing the original task ;-) Cheers, Joachim -- Joachim Breitner mail@joachim-breitner.de http://www.joachim-breitner.de/