until -package:numeric-prelude -package:base-prelude -package:distribution-opensuse -package:extra -package:ghc -package:utility-ht -package:hosc -package:llvm-hs-pure -package:xmonad-contrib -package:github -package:rebase package:selective
Keep running an effectful computation until it returns a
Right value, collecting the Left's using a supplied
Monoid instance.