问混和遮蔽

EN

class A{ foo() => "A";}
class B{ foo() => "B";}
class C{ foo() => "C";}

class Mix extends A with B,C {
  foo() => "MIX";
  bar() => super.foo();
}

class MessABC = Object with A,B,C;
class MessBCA = Object with B,C,A;
class MessCAB = Object with C,A,B;

void main() {
  Mix mix = new Mix();
  MessABC mABC = new MessABC();
  MessBCA mBCA = new MessBCA();
  MessCAB mCAB = new MessCAB();

  print("Mix.foo = ${mix.foo()} Mix.bar = ${mix.bar()} \n"
        "mABC.foo = ${mABC.foo()} \n"
        "mBCA.foo = ${mBCA.foo()} \n"
        "mCAB.foo = ${mCAB.foo()} \n");

}