Pre-Proposal: Add Validation somewhere easily accessible

[Ross Paterson]

On Mon, Sep 22, 2014 at 05:43:05PM +0200, Andreas Abel wrote:
> UPDATE: I found that "Errors e" on
> 
> https://hackage.haskell.org/package/transformers-0.4.1.0/docs/Control-Applicative-Lift.html
> 
> seems to be doing the job of "Validation" already (no nice names of the
> operations, though).

Which operations and names would you like?