lua面向对象

lua面向对象的一种写法：

local function _init(class,...)
	-- body
	local o = setmetatable({},{__index = class})
	if o.__init__ then
		o:__init__(...)
	end

	return o
end

function class(base)
	-- body
	return setmetatable({},{
			__call = _init,
			__index = base
		})
end


People = class()

function People.__init__(self,name,age)
	self.name = name or ""
	self.age = age or 0
end

function People.getInfo(self)
	-- body
	print("name = "..self.name.." age = "..self.age)
end



Man = class(People)

function Man.getInfo(self)
	-- body
	print("man print name = "..self.name.." age = "..self.age)
end

m = Man("xiaoming",25)

m:getInfo()