Re: cython and preprocessor

On 08/02/2011 11:15 AM, Dag Sverre Seljebotn wrote:
> On 08/02/2011 09:49 AM, Denis Bilenko wrote:
>> Hi,
>>
>> I've been using Cython for gevent (http://gevent.org) for 2 years now
>> and love it. Thanks to all the authors and the contributors!
>>
>> One problem that I have to work around is lack of preprocessor support.
>>
>> I've been using this hack:
>>
>> cdef void emit_ifdef "#if defined(_WIN32) //" ()
>> cdef void emit_else "#else //" ()
>> cdef void emit_endif "#endif //" ()
>>
>> but that's very very limited, as it only can be used in the executable
>> code and not in declarations (also results in compiler warnings).
>>
>> So I've made another hack: https://github.com/denik/cython-ifdef
>>
>> It uses unifdef to process the source multiple times for all possible
>> configurations of symbols definitions and then runs cython on all
>> those sources and then merges the resulting .c files into one.
>
> Nice trick!
>
> IMO it would be nice to have this integrated into Cython itself at some
> point, building on Cython syntax, e.g.:
>
> cdef class A: