Impossible to create an inner usertype/enum in a usertype

[kunitoki]

I have an API that has classes and inner classes that i should be binding to lua mirroring the c++ one.
It seems like basic_usertype don't forward base_t::new_enum and base_t::new_usertype so it is not possible to register inner enums and inner classes.

struct outer
{
    struct inner
    {
    };
};

auto outer_class = lua.new_usertype<outer>("outer");
auto inner_class = outer_class.new_usertype<inner>("inner");

Seems quite limiting not being able to do this.

[deadlocklogic]

I usually use this approach which works fine:

auto outer_class = lua.new_usertype<outer>("outer");
auto inner_class = lua.new_usertype<inner>("outer::inner");
lua["outer"]["inner"] = lua["outer::inner"];