lua--面对对象多继承

ClassTool.lua

local function search (k, plist)
    for i = 1, table.getn(plist) do
        local v = plist[i][k]
        if v then return v end
    end
end

function createClass (...)
    local c = {}
    setmetatable(c ,{__index = 
    function (t, k)
        local v = search(k, arg)
        t[k] = v
        return v
    end
    })

    c.__index = c

    function c:new (o)
        o = o or {}
        setmetatable(o, c)
        return o
    end
        return c
end

ClassA.lua

ClassA = {}

function ClassA:msg()
  print("ClassA msg")
end

ClassB.lua

ClassB = {}

function ClassB:say()
  print("ClassB say")
end

main.lua

require("ClassA")
require("ClassB")
require("ClassTool")

local function main()
  ClassTest = createClass(ClassA, ClassB)
  test = ClassTest:new()
  print(test:say())
  print(test:msg())
end

main()