[Pyrex] enums in C++ classes

[Ravi Lanka]

Lenard,

  Thanks very much. It works.

Ravi
 
Lenard Lindstrom wrote:
> Ravi Lanka wrote:
>   
>> Hi,
>>
>>     I am using pyrex to write a wrapper to a C++ library.  class A given 
>> here is a representative class of one of the classes I have in the C++ 
>> library.  It has an enum declared inside the class and one of the 
>> methods takes this enum as an argument. I am not exactly sure how to 
>> wrap this enum and use it from the python module.
>> I have included the code below that works fine and now I want to wrap 
>> the "set" method.
>>
>> please advise.
>> Ravi
>>
>>
>> =====================================================
>> code from a.h and a.cpp:
>> class A {
>>     public:
>>        A(): { value = 0;}
>>        typedef enum some_enum { zero, one, two, three };
>>        void get() { return value;}
>>        void set( some_enum eval, int i ) { value = i*eval ; }
>>     private:
>>        int value;
>> };
>>
>> demo.pyx:
>>     cdef extern from "a.h":
>>         ctypedef struct  A "A":
>>             int (*get) ()
>>             #void (*set)(some_enum val, int i)
>>         A* AFactory "new A"()
>>         void deleteA "delete  " (void *o)
>>
>>     cdef class AWrapper:
>>         def __new__( self ):
>>             cdef A *first
>>             cdef int i
>>             first = AFactory()
>>             print first.get()
>> =======================================================================
>>
>> _______________________________________________
>>   
>>     
>
> This is untried but should work. Move the enum declaration outside the 
> class and use C name specifiers to put it back in the class's namespace:
>
> cdef extern from "a.h":
>     cdef enum Asome_enum "A::some_enum":
>         Azero "A::zero"
>         Aone "A::one"
>         Atwo "A::two"
>         Athree "A::three"
>
>