[Haskell-cafe] Type classes

David Waern david.waern at gmail.com
Sun Jul 4 11:01:38 EDT 2010

2010/7/4 David Waern <david.waern at gmail.com>:
> 2010/7/4 Daniel Fischer <daniel.is.fischer at web.de>:
>>> > Hmm, it seems only partial: documentation attached to an instance is
>>> > shown in the list of instances under a type, but not the list under a
>>> > class.
>>> I'm guessing that's to reduce noise...
>> I'm guessing it might have something to do with the fact that often the
>> module containing the class definition isn't processed together with the
>> module containing the instance declaration.
> Actually Haddock attaches instance information to the modules in a
> separate step after having processed all of them. The fact that no
> documentation shows up for instances under the class documentation is
> a bug, embarrasingly enough, which I hadn't noticed. Looking at the
> code, it's not that I've forgotten to add code to the Html backend,
> it's something deeper that is wrong, so I will have to investigate.

I found the bug and fixed it, it's in the latest darcs version at


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