Splitting SYB from the base package in GHC 6.10

[José Pedro Magalhães]

Hello,

On Sun, Oct 5, 2008 at 12:34, Ross Paterson <ross at soi.city.ac.uk> wrote:

> On Sat, Oct 04, 2008 at 05:17:41PM +0200, José Pedro Magalhães wrote:
> > Basically, a new module Data.Data in base contains the previous
> > Data.Generics.Basics and most of the instances from
> Data.Generics.Instances.
> > Other changes are:
> >
> > On Mon, Sep 15, 2008 at 13:28, José Pedro Magalhães <jpm at cs.uu.nl>
> wrote:
> >
> >       + Ratio has to be fixed to have a consistent instance: either it's
> seen
> >         as an abstract datatype (therefore with undefined gunfold) or a
> gfoldl
> >         has to be defined matching its gunfold;
> >
> > Ratio had its gfoldl defined to match its gunfold. Since GHC.Ratio
> exports the
> > constructor (:%), I guess Ratio cannot be considered abstract.
>
> I don't think GHC.Ratio counts as part of the public interface.
> But Ratio isn't a showstopper.


Sorry, I meant GHC.Real. But I am not sure on this definition either; no one
before had suggested whether to remove or add functionality to this
instance,just that the previous state was inconsistent.


Thanks,
Pedro
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