library test; | |
T f<T>() => throw ''; | |
class A {} | |
class B extends A { | |
B operator *(B v) => throw ''; | |
B operator +(C v) => throw ''; | |
B operator -(int i) => throw ''; | |
C operator &(A v) => throw ''; | |
} | |
class C extends B {} | |
main() {} | |
void test(B local, B? local2, B? local3) {} |