until -package:numeric-prelude -package:base-prelude -package:hosc -package:numhask is:exact -package:intro -package:foundation -package:elerea -package:classy-prelude -package:ghc -package:Cabal-syntax -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