Reposting because I think my original got blocked because of
attachments. Apologies if this appears twice.
I want to allow arbitrary C/F contiguous arrays as input to a cdef
class so I can dispatch to a different calculation method in each
case, avoiding a potentially costly copy.
Unfortunately, it appears that cython is generating incorrect code.
The following minimal example reproduces the problem:
cimport cython
cdef class TestContig:
cdef cython.bint contig
def __init__(self, double[:,:] y):
if y.is_c_contig():
self.contig = 1
elif y.is_f_contig():
self.contig = 1
else:
self.contig = 0
property contig:
def __get__(self):
return self.contig
#
C:\temp> python setup.py build_ext --inplace
running build_ext
building 'example' extension
C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\BIN\cl.exe /c
/nologo /Ox /MD /W3 /GS- /DNDEBUG -IC:\dev\bin\Python27\include
-IC:\dev\bin\Python27\PC /Tpexample.cpp
/Fobuild\temp.win32-2.7\Release\example.obj
example.cpp
example.cpp(1277) : error C3861: '__pyx_memviewslice_is_f_contig2':
identifier not found
error: command '"C:\Program Files (x86)\Microsoft Visual Studio
11.0\VC\BIN\cl.exe"' failed with exit status 2
C:\temp>
I'm on Windows7 with 32bit Python2.7 and I tested that compilation
fails with both VS2012 & MinGW32 4.6.1.
NB: If you only check for f-contiguity (or c-contiguity) in the method it
compiles fine, it appears that the bug only appears when you test for
both f and c contiguity in the same method.
Thanks,
Dave
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