There is a common idiom used in Control.Concurrent libraries, as
embodied in the implementation of bracket:
http://www.haskell.org/ghc/docs/7.0-latest/html/libraries/base-4.3.0.0/src/Control-Exception-Base.html#bracket
bracket before after thing =
mask $ \restore - do
a - before
r -
On 31 January 2011 14:17, Leon Smith leon.p.sm...@gmail.com wrote:
Is there some subtle semantic difference? Is there a performance
difference? It seems like a trivial thing, but I am genuinely
curious.
According to my understanding the two should have equivalent
semantics. As for
