You're perfectly right Andres. ext1Q and extQ work well with monadic result
type. I can't get gmapQ to work though, but I seem to in fact not need it,
so I've removed its usage totally.
Thanks a million!
JP
On Fri, Nov 1, 2013 at 10:00 AM, Andres Löh
Hi.
However, the ext1Q, extQ and gmapQ functions have no monadic equivalent. There seems to be monadic transformation (from a to different a) but no monadic queries (from a to b). Do I have to rewrite these functions myself to work with monadic queries (it at all possible) or is there a better way? I've seen some functions that work with monads and MonadPlus, but I don't see anything that would work with IO.
I think the idea is that the Q functions don't need a monadic counterpart because they can already be used at a monadic result type.
Cheers, Andres
-- Andres Löh, Haskell Consultant Well-Typed LLP, http://www.well-typed.com
-- JP Moresmau http://jpmoresmau.blogspot.com/