Proposal to solve the `EitherT` problem.

[Dan Burton]

+1

This is in the same spirit as the missing Traversable & friends instances
for Either: this is what Haskellers are coming to expect as standard.

-- Dan Burton


On Sun, Jun 16, 2013 at 3:12 PM, Gabriel Gonzalez <gabriel439 at gmail.com>wrote:

> On 06/16/2013 03:09 PM, Roman Cheplyaka wrote:
>
>> * Gabriel Gonzalez<gabriel439 at gmail.com>  [2013-06-16 14:52:46-0700]
>>
>>> * Approach 2: Add `EitherT` to `transformers` alongside `ErrorT` and
>>> have them both implement `MonadError`.
>>>
>> I already submitted the proposal to merge EitherT into transformers [1],
>> which enjoyed universal support, barring some implementation details.
>>
>> So why not just bring that proposal to its conclusion?
>>
>> [1]: http://www.haskell.org/**pipermail/libraries/2012-**
>> December/019027.html<http://www.haskell.org/pipermail/libraries/2012-December/019027.html>
>>
>> Roman
>>
> Thanks for reminding me of this.  I vaguely remembered this but couldn't
> find the thread.
>
> I'll gladly get behind your original proposal, then.  I particularly liked
> the suggestion of keeping the `either` package around to provide the
> `semigroups` and `semigroupoids` instances.
>
>
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