Hello all,
as a happy Pyrex user for more than six years I recently got interested
in Cython as well. So far adopting codes to Cython has in most cases
been quite straightforward. In fact it even resulted in improvements due
to some errors, which Pyrex had not complained about and which were
detected by Cython.
However, for the following minimalistic example the resulting C code
doesn't compile:
#### _stypes.pxd ####
ctypedef public class Time [type MyTime_Type, object MyTimeObject]:
cdef public double seconds
ctypedef public class Event [type MyEvent_Type, object MyEventObject]:
cdef public Time time
#### _stypes.pyx ####
ctypedef public class Time [type MyTime_Type, object MyTimeObject]:
def __init__(self, seconds):
self.seconds = seconds
ctypedef public class Event [type MyEvent_Type, object MyEventObject]:
def __init__(self, Time time):
self.time = time
####
Compilation to C works without complaint, but the compilation of the
resulting C code gives errors like
_stypes.c:319: error: expected specifier-qualifier-list before
'MyTimeObject'
_stypes.c: In function '__pyx_pf_7_stypes_5Event___init__':
_stypes.c:463: error: 'MyEventObject' has no member named 'time'
[The last error repeated several times]
It turns out that in _stypes.c, the declaration of MyEventObject
precedes that of MyTimeObject. Here's the relevant code snippet:
/* Type declarations */
/* "/home/saul/Cython-Test/_stypes.pxd":5
* cdef public double seconds
*
* ctypedef public class Event [type MyEvent_Type, object
MyEventObject]: # <<<<<<<<<<<<<<
* cdef public Time time
*/
typedef struct {
PyObject_HEAD
MyTimeObject *time;
} MyEventObject;
/* "/home/saul/Cython-Test/_stypes.pxd":1
* ctypedef public class Time [type MyTime_Type, object MyTimeObject]:
# <<<<<<<<<<<<<<
* cdef public double seconds
*/
typedef struct {
PyObject_HEAD
double seconds;
} MyTimeObject;
/* Module declarations from _stypes */
I.e. MyTimeObject is declared *after* MyEventObject, which I wouldn't
have expected. Is there any reason for that?
At this point I am stuck, although I suspect that I overlooked something
very simple. Any hints would be appreciated.
By the way, the C code Pyrex produces from the above pyx/pxd compiles
and works properly.
Cython 0.11.2 and Python 2.6 under Ubuntu 9.04.
Cheers,
Joachim
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