举例：

Unit.lua

local Unit = {};Unit.Name = function (u)    print(u.name);endreturn Unit;

Monster.lua

local Unit = require "Unit";local Monster = {};Monster.Name = Unit.Name;return Monster;

run.lua

local Monster = require "Monster"m = {};m.name = "test";Monster.Name(m);

 这里实现的类要做到数据和逻辑分离，好处有很多