Support for new const arrays / ndarray.setflags

[allComputableThings]

AFAIK, there's no way to return a new const-array from an njit function:

import numba
import numpy as np
@numba.jit(nopython=True)
def f():
    x = np.empty(10, dtype=np.bool_)
    x.setflags(write=False)  # Unknown attribute 'setflags' of type array(bool, 1d, C)
    return x
f()

Immutability is fundamental to safe, well designed, easy-to-reason-about APIs, and would a helpful addition.