Function construct

include/pybind11/detail/init.h:108–112

// mechanisms.
template <typename Class>
void construct(...) {
    static_assert(!std::is_same<Class, Class>::value /* always false */,
                  "pybind11::init(): init function must return a compatible pointer, "
                  "holder, or value");
}

// Pointer return v1: the factory function returns a class pointer for a registered class.
// If we don't need an alias (because this class doesn't have one, or because the final type is