John Goerzen wrote:
Python can work that way, but also adds another feature:
try: blah moreblah finally: foo
And in Haskell we have catch(Dyn), bracket, and finally. Are these not enough?
I hadn't been aware of finally. That does seem to help.
One of the things I like about exceptions in haskell is that there's relatively little magic, if a function like finally isn't there, you can implement it yourself. m `finally` f = do r <- m `catch` (\e -> f >> throw e) f return r (I'm ignoring asynchronous exceptions for now, see the code for Control.Exception for details) And I find bracket quite useful, it nicely captures a concept you have to code "by hand" in many other languages. And bracket is also a function you could have implemented yourself, if it hadn't been available. /Peter