class AAA {
public:
    AAA() {}
    AAA(const AAA&) {}
};

class BBB {
public:
    BBB() {}
    operator AAA() { AAA a; return a; }
};

int main() {
    BBB b;
    AAA a = {b};
}

class AAA {};

class BBB {
public:
    BBB() {}
    operator AAA() { AAA a; return a; }
};

int main() {
    BBB b;
    AAA a = {b};
}

class CCC {};

class AAA {
public:
    AAA() {}
    AAA(const AAA&) {}
    AAA(const CCC&) {}
};


class BBB {
public:
    BBB() {}
    operator CCC() {CCC c; return c;}
};

int main() {
    BBB b;
    AAA a = {b};
}