Re: In search of: [a->b] -> a -> [b]

Derek Elkins wrote:

Christian Sievers <sievers@math2.nat.tu-bs.de> wrote:

...

(and this could be a monad comprehension, if Haskell still had them...)

I don't think Haskell ever had them (I'd have to check). Gofer did.

They were put in for Haskell 1.4, and removed again for Haskell 98 because of the horrendously confusing error messages they caused. http://www.haskell.org/definition/ --KW 8-) -- Keith Wansbrough <kw217@cl.cam.ac.uk> http://www.cl.cam.ac.uk/users/kw217/ University of Cambridge Computer Laboratory.