Ok, the ctypedef is the wrong thing. Declaring a fake function that is a
cast on the C side is the way to go:
cdef extern from "foo.h":
int* vla_cast "(int (*)[])" (int*)
int foo(int n, int* a)
cpdef pyfoo():
cdef int data[9]
print foo(3, vla_cast(data))
On Thursday, October 16, 2014 10:34:11 PM UTC+1, Dima Pasechnik wrote:
>
> On 2014-10-16, Volker Braun <vbrau...@gmail.com <javascript:>> wrote:
> > On Thursday, October 16, 2014 8:31:20 PM UTC+1, Dima Pasechnik wrote:
> >>
> >> Strange that Cython does not allow a proper cast, to (int (*)[])).
> >
> >
> > Considering that Cython doesn't allow VLAs its probably not surprising.
> > Just make a C macro for the cast.
>
> hmm, I don't know what this means, i.e. I don't know how to tell Cython
> just to leave the thing alone, and plug it into the generated C.
>
> > Or lie to Cython
> >
> > ctypedef int* vlamatrix "(int (*)[])"
> this gives a syntax error in Cython...
>
> >
> > and use that to call f(n, <vlamatrix>a)
> >
> > Now we just need to find whoever came up with (int (*)[])) as syntax for
> > cast to VLA matrix...
> >
>
>
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