deprecating

[Johan Tibell]

Hi Simon,

On Fri, Oct 19, 2012 at 4:49 AM, Simon Peyton-Jones
<simonpj at microsoft.com> wrote:
> As discussed in Trac #6032 I am deprecating
>
>           Rank2Types
>
>           PolymorphicComponents
>
> in favour of the single flag
>
>           RankNTypes

I'm fine with making the changes to cabal, but before I do, I want to
make sure that we really want to do this. I did a quick investigation
of how many modules need to be updated on Hackage. It's about 775.
That will require quite a lot of work by quite a lot of people. Could
we instead have Rank2Types be an alias for RankNTypes?

Cheers,
Johan