[Haskell-cafe] ANNOUNCE: attempt

Michael Snoyman michael at snoyman.com
Mon Nov 16 15:28:30 EST 2009

We'd like to announce the second release (version 0.0.1) of the attempt
package, for handling of failures. This release has been made to work with
the new control-monad-failure package[1] in an effort to standardize failure

Notable changes to this release:
* The MonadAttempt class was fully redundant with MonadFailure, and has thus
been removed.
* WrapFailure class has been moved to control-monad-failure (with minor
* Data.Attempt.Helper (safe versions of some functions) has been moved to
* Full support for the monadloc package[3] to get monadic stack traces.

As usual, this release is available on hackage[4]. API stability cannot be
guaranteed with this release as well, but we're getting much closer to
hitting the mark.

All the best,
Michael Snoyman, Nicolas Pouillard

1. http://hackage.haskell.org/package/control-monad-failure
2. http://hackage.haskell.org/package/safe-failure
3. http://hackage.haskell.org/package/monadloc
4. http://hackage.haskell.org/package/attempt
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