class DBObject : public QObject
{
    Q_OBJECT
    
    // Here is described a Qt meta-property.
    Q_PROPERTY(int id READ id WRITE setId)

public:
    explicit DBObject(QObject *parent = nullptr);

    int id() const;
    void setId(int id);

private:
    int m_id;
};

class User : public DBObject
{
    Q_OBJECT

    // Here are described Qt meta-properties.
    Q_PROPERTY(QString name READ name WRITE setName)
    Q_PROPERTY(Status status READ status WRITE setStatus)
    
public:
    explicit User(QObject *parent = nullptr);

    enum Status {
        INACTIVE,
        ACTIVE,
        OTHER
    };
    // Here is declared a Qt meta-enum.
    Q_ENUM(Status)

    QString name() const;
    void setName(const QString &name);

    Status status() const;
    void setStatus(const Status &status);

private:
    QString m_name;
    Status m_status;
};

#ifdef __EMSCRIPTEN__
#include <emscripten/bind.h>

// And here we can see kind of copy of the informations already given to Qt meta-object system.
EMSCRIPTEN_BINDINGS(my_example) {

    emscripten::class_<DBObject>("DBObject")
            .property("id", &DBObject::id, &DBObject::setId);

    emscripten::enum_<User::Status>("UserStatus")
            .value("INACTIVE", User::Status::INACTIVE)
            .value("ACTIVE", User::Status::ACTIVE)
            .value("OTHER", User::Status::OTHER);
    emscripten::class_<User, emscripten::base<DBObject>>("User")
            .property("name", &User::name, &User::setName)
            .property("status", &User::status, &User::setStatus);
}

#endif