> On 1 Feb 2020, at 00:36, Greg Ewing <greg.ew...@canterbury.ac.nz> wrote: > > On 1/02/20 12:25 am, John Skaller2 wrote: >> cdef extern from "Python.h": >> ctypedef int int32_t >> ctypedef int int64_t >> ctypedef unsigned int uint32_t >> ctypedef unsigned int uint64_t > > These work because Cython doesn't need to know the exact > sizes of these types. All it needs to know is that they're > some kind of integer so that its type checks will pass. > The typedef names end up in the generated C code, and the > C compiler figures out their actual sizes.
Ah. I see. That makes sense. So this is some kind of hack way of getting something a bit like Haskell type classes, you’re basically saying int32_t and int64_t are of class “Integer”. This also explains the conflict for me, because Felix is the opposite: it aims to make the types of things more precise (and has actual type classes for generalisation). — John Skaller skal...@internode.on.net _______________________________________________ cython-devel mailing list cython-devel@python.org https://mail.python.org/mailman/listinfo/cython-devel
