Re: deprecating Error class (Was: Proposal: add handleError to mtl)

6 Jun 2013

      On Thu, 6 Jun 2013, Roman Cheplyaka wrote:
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* Henning Thielemann  [2013-06-06 12:14:10+0200]
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On Wed, 5 Jun 2013, Ross Paterson wrote:
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On the subject of ErrorT, I wonder if it's time to deprecate the Error class.
Since I think ErrorT gives the wrong association with the 'error'
function, I would prefer to give up the Control.Monad.Trans.Error
module entirely and start a new module Control.Monad.Trans.Exception.
... which would give the wrong association with exceptions (in the
Control.Exception sense). I don't see how this is an improvement.
It's the better association and it is already mentioned in the module 
description of Control.Monad.Trans.Error:

"This monad transformer adds the ability to fail or throw exceptions to a 
monad."

Nonetheless, you may suggest another module name. Independent from the 
name of a new module, I would suggest to deprecate the Error name instead 
of removing something from the Error module.