Changes to Typeable

[José Pedro Magalhães]

Uhm, you answered my question already, I just didn't read your email
carefully:

On Wed, Oct 3, 2012 at 1:01 PM, Simon Peyton-Jones <simonpj at microsoft.com>wrote:

>
> * All this is fine.  But we don't (ever) want the programmer to write
>    any instance of Typeable; that ways lies seg-faults, since we may
>    rely on their veracity.
>
>
I think I agree, but, then again, I have never written my own Typeable
instances.
Do note, however, that GHC currently uses the `time` package, which gives
manual
`Typeable` instances (CC-ing Ashley; maybe he can defend writing Typeable
instances
manually). I noticed this while working on the change-over to the
kind-polymorphic `Typeable`.


Cheers,
Pedro
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