On Tue, 25 Mar 2008, Ryan Ingram wrote:
settest :: S.Set Int
settest = runSetM $ do
x <- mplus (mplus mzero (return 2)) (mplus (return 2) (return 3))
return (x+3)
-- fromList [5,6]
What this does under the hood is treat the computation on each element of the
set separately, except at programmer-specified synchronization points where
the computation result is required to be a member of the Ord typeclass.
It's like working in the List monad mainly, collapsing duplicates from
time to time, right?
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