[Pyrex] #if

[Bryan Weingarten]

Michael P. Dubner wrote:

> Bryan Weingarten wrote:
>
>> the following #if statement didn't appear the generated c code.  is
>> there something i'm missing to make this work?
>>
>> def map_win32(self, err):
>>    #if defined(_windows)       return _wgpr._builtins._map_win32(err)
>>    #endif
>>
>> thanks,
>> bryan
>>  
>>
> Why your version not working was described in at least two letters.
> There is one (yet) unsupported solution for your problem. I've written 
> pre-processor for Pyrex.
> You can download it here:
>
> http://www.dubnerm.newmail.ru/soft/PyxPP/PyxPP-0.9-1.tar.gz
>
> It's not yet accepted or rejected by Greg (I've sent him a patch but 
> he possibly has no time to check it out).
> Using it you can rewrite you code as:
>
> def map_win32(self, err):
>    #@if defined(_windows)
>    return _wgpr._builtins._map_win32(err)
>    #@endif
>
> At symbol (@) used to distinguish normal Python comments from 
> conditional compilation statements. For more details lookup:
> http://www.dubnerm.newmail.ru/soft/PyxPP/
>
> -- 
> Best regards,
> Michael Dubner
> PS: Sorry for my English
>
>
>
>


this looks great.  i have one question that i couldn't figure out from 
the documentation.  in this example

cdef extern from "spam.h":
  void *spam_init(int argc, char* argv[])
*  #@if HostOS=="nt"*
  void spam_as_nt_service(void *spam)
*  #@elif HostOS=="posix"*
  void spam_use_fork(void *spam, int flag)
*  #@endif*
  spam_finish(void *spam)


is HostOS defined in spam.h?

bryan