Did you consider the transitive dependency from errors?
Errors re-exports Control.Monad.Trans.Either from Control.Error.
In particular I noted that snap then depends on errors.
I didn't grep through the source though.
-Edward
On Tue, Aug 13, 2013 at 1:25 PM, Ross Paterson
On Tue, Aug 13, 2013 at 10:30:23AM -0400, Edward Kmett wrote:
An argument against just randomly bikeshedding the name it is there are a lot of packages out there currently transitively depending on the existing either package, due to the popularity of Tekmo's errors package and the fact that it has been picked up by snap. So half of the web-apps in the ecosystem depend on this type transitively.
Fortunately it seems that EitherT is only used by the following packages:
citation-resolve coroutine-object CSPM-Frontend errors happstack-heist hoodle-core hoodle-parser katt pdf-toolbox-core pianola restricted-workers terminfo-hs
Moreover adding a new module and type means people can switch over an extended timescale. Thus I think internal consistency within transformers outweighs compatibility with the existing EitherT in this case.
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