// @dart = 2.9 | |
library test; | |
T f<T>() => null; | |
class A { | |
C operator +(F v) => null; | |
C operator -(int i) => null; | |
} | |
class B extends A { | |
D operator +(E v) => null; | |
D operator -(int i) => null; | |
} | |
class C extends B {} | |
class D extends C {} | |
class E extends D {} | |
class F extends E {} | |
class Index {} | |
class Test { | |
B operator [](Index i) => null; | |
void operator []=(Index i, A v) {} | |
void test() {} | |
} | |
main() {} |