[ENH/BUG?] Enum as C array index value: Invalid index type 'Test'

[Source61]

Describe the bug

Not sure if this is a bug or enhancement.

I have a C array with defined index ranges in an enum.

In C++ this will compile and run, in Cython this generates the error "Invalid index type 'Test'".

A work-around is to cast the enums to int, but it's ugly and I think unnecessary since enums are already defined as ints?
(Trying to assign 0.4 to Test_Something results in error: enumindex.pyx:3:19: Cannot assign type 'double' to 'int')

Code to reproduce the behaviour:

cdef:
        enum Test:
                Test_Something = 0

        int arr[15]

arr[Test_Something] = 123

Expected behaviour

No response

OS

Linux (Ubuntu 22.04.3 LTS WSL)

Python version

3.10.12

Cython version

3.0.10

Additional context

No response

[da-woods]

I suspect this should work (for plain enums). It shouldn't for C++ scoped enums though.