until -package:numeric-prelude -package:language-bash -package:distribution-opensuse -package:LambdaHack -package:rebase -package:free -package:linear-base -package:utility-ht -package:singletons-base -package:monad-loops -package:varying package:filepath

findFromEndUntil :: (Word16 -> Bool) -> ShortByteString -> Int
filepath System.OsPath.Data.ByteString.Short.Internal
Returns the length of the substring matching, not the index. If no match, returns 0.