Function auxiliaries

deps/pybind11-2.13.1/tests/test_numpy_array.cpp:142–157

template <typename T, typename T2>
py::handle auxiliaries(T &&r, T2 &&r2) {
    if (r.ndim() != 2) {
        throw std::domain_error("error: ndim != 2");
    }
    py::list l;
    l.append(*r.data(0, 0));
    l.append(*r2.mutable_data(0, 0));
    l.append(r.data(0, 1) == r2.mutable_data(0, 1));
    l.append(r.ndim());
    l.append(r.itemsize());
    l.append(r.shape(0));
    l.append(r.shape(1));
    l.append(r.size());
    l.append(r.nbytes());
    return l.release();
}

// note: declaration at local scope would create a dangling reference!
static int data_i = 42;