16 Jan
2007
16 Jan
'07
8:20 p.m.
G'day all. On Tue, Jan 16, 2007 at 14:06:08 +0200, Yitzchak Gale wrote:
But the list monad [] is not a transformer, so you can't lift in it, even if the contained type happens also to be a monad.
Quoting Magnus Therning
Yeah, I had some vague thought of that being a problem, which lead me to ListT.
ListT is also not a transformer. See here for details: http://www.haskell.org/hawiki/ListTDoneRight Cheers, Andrew Bromage