Mixins of Dart

Dart里的Mixin

一开始以为只是简单的代码混入，感觉还蛮好用。

但是多个Mixin如果有相同的函数或变量混入了如何解决？

Mixins in Dart work by creating a new class that layers the implementation of
the mixin on top of a superclass to create a new class - it is not “on the side “ but “on top” of the superclass, so there is no ambiguity in how to resolve lookups.

- Lasse R. H. Nielsen on StackOverflow.

以下的代码，实际上继承链为Disposable->A->B->AB。

abstract class Disposable {
  void dispose() {
     print('Disposable');
  }
}

mixin A on Disposable {
  @override
  void dispose() {
    super.dispose();
    print('A');
  }
}

mixin B on Disposable {
  @override
  void dispose() {
    super.dispose();
    print('B');
  }
}

final class AB extends Disposable with A,B {
  @override
  void dispose() {
    super.dispose();
    print('AB');
  }
}


void main() {
  AB().dispose();
}