Lua 七 對象

Person = {name = "siki",age = 16}

function  Person:eat ()
	print(self.name.."在吃飯")

end

function Person:new(o)
	loacl t = o or {}
	setmetatable(t,{__index = self})
	return t
end

person1 = Person:new()
person1.name = "xiaoli"
print(person1.name)

執行的時候

>lua -e "io.stdout:setvbuf 'no'" "duixiang.lua" 
xiaoli
>Exit code: 0

另外
 

setmetatable(t,{__index = self})

等價於

setmetatable(t,self)
self.__index = self

 

另外繼承的用法 如下

Person = {name = "siki",age = 16}

function  Person:eat ()
	print(self.name.."在吃飯")

end

function Person:new(o)
	local t = o or{}
	setmetatable(t,{__index = self})
	return t
end

person1 = Person:new()
person1.name = "xiaoli"
print(person1.name)

Student = Person:new()
Student.grade = 1

stu1 = Student:new()

print(stu1.grade)