24 Feb
2011
24 Feb
'11
6:01 p.m.
On Thu, Feb 24, 2011 at 2:42 PM, Andrew Coppin
Anybody have any hints on how to get around this?
Use a lazy state monad?
That's not going to work. It still needs to read the input to determine which monadic action comes next, and hence what the final result will be. So whether it forces the result or not, it still has to scan the entire input before it can generate any output.
From the sound of it, you want some kind of lazy IO, driven/generated by a state monad. Check out the "safe-lazy-io". I've never used it, but the announcement is pretty convincing. http://www.haskell.org/pipermail/haskell/2009-March/021133.html