until -package:numeric-prelude -package:streaming -package:util -package:snap-core -package:ghc -package:ghc-lib-parser -package:Cabal -package:numhask -package:free package:utility-ht
repeat action until result fulfills condition
Take all elements until one matches. The matching element is returned,
too. This is the key difference to
takeWhile (not . p). It
holds:
forAllPredicates $ \p xs -> takeUntil p xs == fst (breakAfter p xs)