until -package:numeric-prelude -package:util -package:xmonad-contrib -package:LambdaHack -package:mixed-types-num -package:extra -package:basic-prelude -package:ghc-lib-parser -package:ghc 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.