I think that new SomeAsyncException type in base is supposed to make it possible to ignore all asynchronous exceptions. https://github.com/ghc/packages-base/blob/master/GHC/IO/Exception.hs#L113
On Wed, 10 Jul 2013 09:28:12 +0300 Michael Snoyman <mich...@snoyman.com> wrote: > There's a pattern that arises fairly often: catching every exception > thrown by code. The naive approach is to do something like: > > result <- try someCode > case result of > Left (e :: SomeException) -> putStrLn $ "It failed: " ++ show > e Right realValue -> useRealValue > > This seems perfectly valid, except that it catches a number of > exceptions which seemingly should *not* be caught. In particular, it > catches the async exceptions used by both killThread and timeout. > > I think it's fair to say that there's not going to be a single > function that solves all cases correctly, but it is a common enough > situation that people need to write code that resumes work in the > case of an exception that I think we need to either have some > guidelines for the right approach here, or perhaps even a utility > function along the lines of: > > shouldBeCaught :: SomeException -> Bool > > One first stab at such a function would be to return `False` for > AsyncException and Timeout, and `True` for everything else, but I'm > not convinced that this is sufficient. Are there any thoughts on the > right approach to take here? _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
