FullBinaryTreeRelation? :P On Tue, May 8, 2012 at 1:36 PM, MigMit <miguelim...@yandex.ru> wrote:
> Hi café, a quick question. > > Is there a somewhat standard class like this: > > class Something c where > unit :: c () () > pair :: c x y -> c u v -> c (x, u) (y, v) > > ? > > I'm using it heavily in my current project, but I don't want to repeat > somebody else's work, and it seems general enough to be defined somewhere; > but my quick search on Hackage didn't reveal anything. > > I know about arrows; this, however, is something more general, and it's > instances aren't always arrows. > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe >
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