Re: darcs patch: Add justIf to Data.Maybe

Joachim Breitner writes:

are you proposing that, if check is available, no justIf is needed in the libraries? Or are you just proposing a different implementation?

For the record, I am opposed to justIf on the grounds that it is a specialisation of something that should be typed at MonadPlus (and which would consequently have to have a different name). -- Jón Fairbairn Jon.Fairbairn@cl.cam.ac.uk