标签:style blog http io ar color os sp on
__index的应用
Window_Prototype = {x=0, y=0, width=100, height=100, m ={i=50}}
Window_Prototype2 = {p=50, s=70}
MyWin = {title="Hello"}
setmetatable(MyWin, {__index = Window_Prototype})
setmetatable(MyWin, {__index = Window_Prototype2})
print(MyWin.x, MyWin.y, MyWin.width, MyWin.height, MyWin.p, MyWin.s, Window_Prototype.m.i)
注:__index 可以为表绑定其他成员并通过点的方式进行访问 MyWin.m.i 为错误访问形式(不明白为什么,继续学习)

继承的实现
Student = Person:new() function Student:new() newObj = {year = 2013} self.__index = self return setmetatable(newObj, self)end function Student:toString() return "Student : ".. self.year.." : " .. self.name endStudent 继承自 Person
student new方法先执行父类的person的new然后对year重设
参考:http://coolshell.cn/articles/10739.html
标签:style blog http io ar color os sp on
原文地址:http://www.cnblogs.com/ad-1990/p/4121545.html