Lua实现类继承
投稿：hebedich
这里给大家演示的是一个使用lua实现类继承的示例，实现类继承其实有很多种写法，这里是本人常用的方法，推荐给大家。
mulInherit.lua
复制代码 代码如下:
--[[
author:looyer@sina.com
date:2014/7/18
purpose:lua的继承演示
--]]
--- base class "Object"
local Object = {_t = "Object"}
function Object:new(id)
local o =
{
_id = id
}
setmetatable(o, self)
self.__index = self
return o
end
function Object:type()
return self._t
end
function Object:id()
return self._id
end
--- class "Widget" driver from "Object"
local Widget = {_t = "Widget"}
setmetatable(Widget, Object)
function Widget:new(id)
local o =
{
_id = id,
}
setmetatable(o, self)
self.__index = self
-- function (tb, key)
-- return self[key]
-- end
return o
end
-- function Widget:id()
-- return self._id
-- end
--- class "Drawor" driver from "Object"
local Drawor = {_t = "Drawor"}
setmetatable(Drawor, Object)
function Drawor:new(id, name)
local o =
{
_id = id,
_name = name,
}
setmetatable(o, self)
self.__index = self
return o
end
function Drawor:name()
return self._name
end
--- class "DrawPlane" driver from "Widget" and "Drawor"
local DrawPlane = {_t = "DrawPlane", _father = {Widget, Drawor}}
function DrawPlane:new(id)
local o =
{
_id = id,
}
setmetatable(o, self)
self.__index =
function (tb, key)
if self[key] then return self[key] end
for _, v in pairs(self._father) do
if v._t == key then return v end
if v[key] then return v[key] end
end
end
return o
end
local varA = Object:new()
local varB = Widget:new(10)
local varC = Drawor:new(30, "dwr")
local varD = DrawPlane:new(51)
print("varA type:", varA:type())
print("varB type:", varB:type())
print("varB._id: ", varB._id, varB:id())
print("varC name: ", varC:name())
print("varD type: ", varD:type())
print("varD id: ", varD:id())
print("varD father Widget--", varD.Widget:type())
以上就是本文所要分享的代码了，希望大家能够喜欢。