until -package:numeric-prelude -package:base-prelude -package:hosc -package:numhask -package:prelude-compat -package:snap-core -package:faktory -package:elerea is:exact -package:basic-prelude package:utility-ht

until :: Monad m => (a -> Bool) -> m a -> m a
utility-ht Control.Monad.HT
repeat action until result fulfills condition