Hello Günther, I think the largest reason Haskellers don't use left-fold enumerators is that there isn't a ready-to-use package on Hackage. Oleg's code is extremely well commented and easy to follow, but it's not cabalized. In addition to Takusen, Johan Tibbe's hyena application server uses enumerators for IO: http://github.com/tibbe/hyena/tree/master There is a darcs repo of a cabalized iteratee package available at http://inmachina.net/~jwlato/haskell/iteratee/ This is essentially Oleg's code, slightly modified and reorganized. If anyone is interested in using left-fold enumerators for IO, please give it a look and let me know what you think. I'd like to put this on hackage in about a week or so, if possible. I would especially appreciate build reports. There are a few iteratee/enumerator design questions that remain, which Oleg and others would like to explore more fully. The results of that research will likely find there way into this library. Sincerely, John Lato
Hi all,
in the last few months I was looking for haskell database library, eventually settling for HDBC (thanks John btw).
Takusen also caught my eye although I even failed installing it.
Nevertheless a particular property of takusen, left-fold-enumerator, also sparked my interest and I tried to follow it up.
I had the impression this is something of relevance but something that is not mentioned or made use of often. There are actually only a few references on the net and most of those by one person only, Oleg.
There was one post from John Goerzen about Haskell HTTP libraries in which he hinted using left-fold enumerators.
Anyway what I'm saying is that the whole topic is somewhat off the radar of the larger haskell community, how come, or am I merely overestimating its relevance and usefulness?
Günther