Function index_at

tests/test_numpy_array.cpp:111–113

template <typename... Ix>
py::ssize_t index_at(const arr &a, Ix... idx) {
    return a.index_at(idx...);
}
template <typename... Ix>
py::ssize_t index_at_t(const arr_t &a, Ix... idx) {
    return a.index_at(idx...);