oop = require("oop/oop")

function Vault(cls)
    cls.setattr(cls, "public_note", nil, "public")
    cls.setattr(cls, "protected_note", nil, "protected")
    cls.setattr(cls, "private_note", nil, "private")

    cls.method("public_method", function(this)
        print("public_method:", this.public_note)
    end, "public")

    cls.method("protected_method", function(this)
        print("protected_method:", this.protected_note)
    end, "protected")

    cls.method("private_method", function(this)
        print("private_method:", this.private_note)
    end, "private")

    function cls.__init(this)
        this.public_note = "hello"
        this.protected_note = "shielded"
        this.private_note = "secret"
    end
end

function SubVault(cls)
    cls.inherit(Vault)

    function cls.show_all(this)
        print("inside SubVault:")
        this.public_method()
        this.protected_method()
        this.private_method()
    end
end

local v = oop.new(Vault)
print("outside Vault:")
print("public_note:", v.public_note)
v.public_method()
print("protected_note:", v.protected_note)
print("private_note:", v.private_note)
v.protected_method()
v.private_method()

local s = oop.new(SubVault)
s.show_all()