lua中table的单继承与多继承

Table单继承（元表）

account = {}
function account:new( o )
    o = o or {}
    setmetatable(o,self)
    self.__index = self
    return o
    -- body
end
function account:show( v )

print(self.bb…v)

– body

end

a = account:new({bb = 'aa'})

a:show('bb') – aabb

Table多继承(不常用)

local function search(k,plist )

– body

for i=1,#plist do

local  v = plist[i][k]

if v then

return v

end

end

end

function createClass( … )

– body

local c = {}

local parent = {…}

setmetatable(c,{__index = function ( t,k )

– body

return search(k,parent)

end})
c.__index = c
function c:new(o )
    -- body
    o = o or {}
    setmetatable(o,c)
    return o
end

end