[Pyrex] Anonymous union inside struct

[Lenard Lindstrom]

Jonne wrote:
> Hi!
>
> I have the following c-code:
>
> typedef struct expansion_t {
>     int type;                     
>  
>     union {
>         struct nunchuk_t nunchuk;
>         struct classic_ctrl_t classic;
>         struct guitar_hero_3_t gh3;
>     };
> } expansion_t;
>
>
> Where all the structures in the union are of a different size.
>
> Now, I know that pyrex can't nest ctypedefs, but is it possible to 
> convert this code to pyrex, so
> that I can refer to both exp.type and exp.gh3, if object is an 
> expansion_t?
>
>
The structure declaration in an cdef extern never actually declares 
anything. It is for Pyrex book keeping only. So unnamed structure or 
union elements can be flattened:

cdef extern from "header.h":
    struct nunchuk_t:
        ....
    ....
    ctypedef struct expansion_t:
        int type
        struct nunchuk_t nunchuk
        struct classic_ctrl_t classic
        struct guitar_hero_3_t gh3


-- 
Lenard Lindstrom
<len-l at telus.net>