Henning Thielemann wrote:
instance on Foo a?
Btw. was anything bad about the suggested Haskell98 solution?
You called it 'non-hacky'; I would call it 'slightly hacky' since, IMO,
it qualifies as a hack around a deficiency in the class system.
However, I don't think there is anything wrong with it. After all it's
the same trick the Prelude uses for instance Show [Char].
Jules
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