Re: [boost] [fusion] Illegal partial specialization error.

From: Joel de Guzman (joel_at_[hidden])
Date: 2007-07-02 02:22:19

Eric Niebler wrote:
> 
> Joel de Guzman wrote:
>> Stefan Seefeld wrote:
>>> Michael Marcin wrote:
>>>> If I include <boost/fusion/support/tag_of.hpp> my compiler (derived 
>>>> from Metrowerks 9.4) gives me several errors claiming illegal 
>>>> partial specializations.
>>>>
>>>> It looks like it's partially specializing forward declarations of 
>>>> the tag_of structure.  I don't know if that's allowed (from the 
>>>> error I assume probably not) but it certainly seems to be pointless 
>>>> to me.  Are these perhaps supposed to be more than declarations?
>>> What's the point, if you (partially) specialize it anyway ?
>>>
>>> FWIW, I have seen similar errors with IBM's XLC++ and am pretty sure 
>>> that
>>> at least in that particular case it was a compiler bug.
>>
>> Yes, it's most probably a compiler bug. I've seen this before.
>> patch welcome ;-). I do not have CW now.
> 
> The attached patch should fix this problem. It uses an MPL assert in the 
> primary template to catch potential ODR violations, rather than forward 
> declared partial specializations.

Cool! Committed to CVS? Thanks!

Regards,
-- 
Joel de Guzman
http://www.boost-consulting.com
http://spirit.sf.net