Gabriel439/Haskell-Pipes-Library — pull request #125 by k0001 (2014-08-26 23:59:37+00:00)
Title: Add support for ExceptT in Pipes.Lift

This depends on the version of `mmorph` that is in GitHub which provides instances for `ExceptT`.

There is no `liftCatchExcept` as it would be exactly the same as `liftCatchError`. `catchExcept` is a bit more general than its `catchError` counterpart in that it the error type can change.

There's no urgency to merge this from my side, I just had some spare minutes and decided to add this and send a pull request.