Injective type families

[Ben Gamari]

Jan Stolarek <jan.stolarek at p.lodz.pl> writes:

> Ben,
>
>>   1. Should this feature be placed behind a LANGUAGE pragma?
> 
> No, I don't think it should. I consider it a tiny addition to
> TypeFamilies that is not worth having its separate pragma. Injective
> TFs are fully backwards compatible, so no existing code
> will be broken.
>
That being said, it does claim new syntax and consequently would be
rather difficult to back out if we realize that this implementation
isn't the right direction. I don't have a strong opinion here, just
playing devil's advocate.

>>   2. Could you perhaps add some text to better motivate the feature in
>>      the users guide?
> Done. Tell me whether you like the new version.
>
Definitely better. Thanks for the quick turnaround!

> BTW do we still have nightly builds of User's Guide?
>
I have a script that I periodically run to push the documentation from
my test builds here:

    http://downloads.haskell.org/~ghc/master/users-guide//

It's updated pretty close to daily.

Cheers,

- Ben
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