Max Rabkin
Though I would argue that unless you're trying to actually use for Show/Read for serialisation, does it really matter what the Show/Read instances for Bytestring are?
Convenient debugging and REPL interaction certainly matter!
On the other hand, having a separate Show instance for Vector Word8 would require either writing all Show instances explicitly or keeping two separate packages. I would prefer to have the two packages merged into one. But since I find a useful Show instance for ByteString useful, too, I would go with the first variant of providing a few default instances instead of a generic Show a => Show (Vector a) instance. That way you can write nicer instances for some other element types, too. For example I can imagine how a much nicer Vector Bool instance would look like: fromBoolString "1.1..111..1" Greets, Ertugrul -- nightmare = unsafePerformIO (getWrongWife >>= sex) http://ertes.de/