Well, I'm stupid, I only need to combine sequence with gmapQ and it works! Thanks Andres!

JP


On Fri, Nov 1, 2013 at 11:07 AM, JP Moresmau <jpmoresmau@gmail.com> wrote:
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 <andres@well-typed.com> wrote:
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/