until -package:numeric-prelude -package:util -package:xmonad-contrib -package:LambdaHack -package:prelude-compat -is:exact -package:free -package:classy-prelude -package:base-compat -package:elerea -package:base package:rebase
until p f yields the result of applying
f
until
p holds.
Keep running an effectful computation until it returns a
Right value, collecting the Left's using a supplied
Monoid instance.