bool is_stack(std::false_type) const {
auto pp = stack::push_pop(*this);
return stack::check<T>(lua_state(), -1, no_panic);
}
decltype(auto) as_stack(std::false_type) const {
base_t::push();
return stack::pop<T>(lua_state());
}
bool is_stack(std::true_type) const {
return stack::check<T>(lua_state(), base_t::stack_index(), no_panic);
}
decltype(auto) as_stack(std::true_type) const {
return stack::get<T>(lua_state(), base_t::stack_index());
}