until -package:numeric-prelude -package:yesod-paginator -package:prelude-compat -package:numhask -package:snap-core -package:faktory -package:clash-prelude -package:distribution-opensuse -package:free -package:foundation -package:scalpel-core package:selective
Keep running an effectful computation until it returns a
Right value, collecting the Left's using a supplied
Monoid instance.