[Haskell-cafe] Introducing Instances in GHC point releases

[John Goerzen]

Don Stewart wrote:
> duncan.coutts:
>> What we're currently missing is a PVP checker: a tool to compare APIs of
>> package versions and check that it is following the PVP. Ideally, we
>> will have packages opt-in to follow the PVP for those packages that do
>> opt-in we have the PVP enforced on hackage using the checker tool. Since
>> the HP is almost certainly going to require packages to follow the PVP
>> then this should eliminate this class of mistakes. But it does need the
>> tool, and nobody is working on that at the moment.
> 
> If I recall correct, CosmicRay wrote just such a thing (or similar to
> it) a while ago.
> 
> John?

Nope, that wasn't me.  Maybe the other John?

> 
> -- Don
>