Lua super-light fancy delegative prototypal inheritance

example.lua

local Base = require('library').Base

local Person = Base {
  -- missing properties: name
  speak = function (self)
    return "Hello, I am " .. self.name
  end
}

local Programmer = Person {
  -- missing properties: name
  speak = function (self)
    -- "super call"
    return Person.speak(self) .. " and I like programming"
  end
}

local me = Programmer { name = "FireFly" }

print(me:speak() .. "!") -- Hello, I am FireFly and I like programming!

library.lua

local function inherit(self, tbl)
  return setmetatable(tbl, { __index = self, __call = inherit })
end

local Base = inherit({}, {}) -- our base type

return { inherit = inherit, Base = Base }