The ABC of Dart Part 5 - 操作符重载

Dart可以像C语言一样重载部分操作符。支持重载的操作符有：

<	+	^	[]
>	/	&	[]=
<=	~/	<<	~
>=	*	>>	==
–	%

重载通过operator关键字实现：

class Point{
    int x;
    int y;
    
    Point(this.x, this.y);
    
    //重载加号运算符
    Point operator +(Point point){
        return new Point(x + point.x, y + point.y);
    }
}

void main(){
    Point p1 = new Point(1,2);
    Point p2 = new Point(3,4);
    print((p1 + p2).x);//打印4
    print((p1 + p2).y);//打印6
}