How to convert certain typedefs to Pyrex?

[Greg Ewing (using news.cis.dfn.de)]

Edward C. Jones wrote:
> How do I treat the following typedefs in Pyrex?
>
> typedef struct _IplTileInfo IplTileInfo;
> typedef struct _CvContourScanner* CvContourScanner;
> typedef struct CvPOSITObject CvPOSITObject;

ctypedef struct IplTileInfo
cdef struct _CvContourScanner
ctypedef _CvContourScanner *CvContourScanner
ctypedef struct CvPOSITObject

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg