FWIW, I think I'm weakly opposed. Either is Haskell 98. MonadFail is
solidly "standards-track" material, to the extent that designation is meaningful
at the moment. IsString ... isn't.
On Wed, Oct 24, 2018 at 10:44 PM Daniel Bergey
Is there still consensus in favor of adding this instance?
instance IsString str => MonadFail (Either str) where fail = Left . fromString
In 2016 there was some discussion, and my reading is that there was consensus in favor at the time: Trac: https://ghc.haskell.org/trac/ghc/ticket/12160 libaries mailing list: https://mail.haskell.org/pipermail/libraries/2016-August/027248.html
Does anyone know of a later decision not to add it, or was it simply no one's top priority?
What is the next step to move this proposal forward? Is more discussion in order? Should I just submit a patch?
Thanks, bergey _______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries