On Sat, 8 Jan 2011, Roman Cheplyaka wrote:
I think catMaybes deserves its own typeclass, which would represent
"truncatable" structures:
class Truncatable struct where
catMaybes :: struct (Maybe a) -> Maybe a
But catMaybes has the type catMaybes :: struct (Maybe a) -> struct a for struct = [] _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
