mixins的實例類型是什麼?
很簡單,mixins的類型就是其超類的子類型。
class A {
String info="this is A";
void printA(){
print("A");
}
}
class B {
void printB(){
print("B");
}
}
class C with A,B{
}
void main(){
var c=new C();
print(c is C); //true
print(c is A); //true
print(c is B); //true
// var a=new A();
// print(a is Object);
}