Wrap enum class for cython

Question

I am trying to wrap an enum class in a c++ header file for use in a cython project.I have googled around and can not find out how to achieve this - is it supported?

Answer 1

Another alternative that allows using PEP-435 Enums as mentioned in Cython docs is as follows:

foo.h

namespace foo {
enum class Bar : uint32_t {
    Zero = 0,
    One = 1
};
}

foo.pxd

from libc.stdint cimport uint32_t

cdef extern from "foo.h" namespace 'foo':

    cdef enum _Bar 'foo::Bar':
        _Zero 'foo::Bar::Zero'
        _One  'foo::Bar::One'


cpdef enum Bar:
    Zero =  _Zero
    One  =  _One

main.pyx

from foo cimport Bar

print(Bar.Zero)
print(Bar.One)

# or iterate over elements
for value in Bar:
    print(value)