[Cython] Refcount nanny status

[Michael Abshoff]

Robert Bradshaw wrote:
> On Jan 9, 2009, at 5:47 PM, Michael Abshoff wrote:
> 
>> Stefan Behnel wrote:
>>> Dag Sverre Seljebotn wrote:
>>>> I don't have time for fixing it, but old_temp in NewTempsExprNode  
>>>> was
>>>> introduced solely to do "print self.old_temp" during debugging.  
>>>> Sorry,
>>>> there should have beena comment.
>>> I fixed the crash (but not the underlying temp problem).
>> Thanks
>>
>>> You should at
>>> least get a meaningful error message out of it now.
>> Now the first file in the Sage library builds, but the second one from
>> 3.2.3 fails:
> 
> [...]

Hi Robert,

>> RuntimeError: no temp, but release requested in CoerceToTempNode
>>
>> I am not quite sure what to do next, but I am hoping RobertWB or
>> somwbody else has an idea what the problem might be :)
> 
> OK, I looked into this and got Cython to work through the entire Sage  
> library. It has issues compiling
> 
> http://hg.sagemath.org/sage-main/file/b0aa7ef45b3c/sage/combinat/ 
> matrices/dancing_links.pyx
> http://hg.sagemath.org/sage-main/file/b0aa7ef45b3c/sage/combinat/ 
> matrices/dancing_links_c.h
> 
> sage/combinat/matrices/dancing_links_c.h: In member function ‘column*  
> dancing_links::smallest_column()’:
> sage/combinat/matrices/dancing_links_c.h:73: error: ‘set’ was not  
> declared in this scope
> sage/combinat/matrices/dancing_links_c.h:73: error: expected primary- 
> expression before ‘*’ token
> sage/combinat/matrices/dancing_links_c.h:73: error: expected primary- 
> expression before ‘>’ token
> sage/combinat/matrices/dancing_links_c.h:73: error: ‘seenColumns’ was  
> not declared in this scope
> 
> and I don't know enough C++ to diagnose the error message. Any ideas?

Which gcc are you using?

Do you have your changes anywhere so I can play with them?

Is set in any way now a reserved Cython word? Maybe it is as simple as 
prefixing set with std::, but I would prefer to play with it. Pinging 
Carlo Hamalainen (listed at the top of the file) might also be a good 
idea :)

> - Robert

Cheers,

Michael

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