Function cast

include/pybind11/stl.h:205–218

    template <typename T>
    static handle cast(T &&src, return_value_policy policy, handle parent) {
        if (!std::is_lvalue_reference<T>::value) {
            policy = return_value_policy_override<Key>::policy(policy);
        }
        pybind11::set s;
        for (auto &&value : src) {
            auto value_ = reinterpret_steal<object>(
                key_conv::cast(detail::forward_like<T>(value), policy, parent));
            if (!value_ || !s.add(std::move(value_))) {
                return handle();
            }
        }
        return s.release();
    }

    PYBIND11_TYPE_CASTER(type,
                         io_name("collections.abc.Set", "set") + const_name("[") + key_conv::name