14 Mar
2011
14 Mar
'11
12:56 p.m.
If you have only one alternative, then you can simply do:
Opt1 <- someIO
E.g., if you are _sure_ that foo returns always a 'Just' within a monad you
can perfectly do :
Just x <- foo
2011/3/14 tsuraan
In my code, I'm doing this quite a lot:
x <- someIO case x of Opt1 -> ...
Having a line for extracting the value from the IO (or STM) and then acting on the value seems unnatural. Is there a more concise way to do this? This code:
case someIO of Opt1 -> ...
Doesn't work, but is there something like that, that is valid?
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