until -package:numeric-prelude -package:base-prelude -package:distribution-opensuse -package:extra -package:llvm-hs-pure -package:faktory -package:yesod-paginator -package:sparse-linear-algebra -package:IfElse package:selective -is:exact
Keep running an effectful computation until it returns a
Right value, collecting the Left's using a supplied
Monoid instance.