`extends` doesn't work anymore? about 30log

[Yonaba]

Hi, Martin,

Actually, that works fine if you do this:

function Actor:__init()
    Actor.super.__init(self)
    self.test2 = "2"
    for k, v in pairs( self ) do
        print( k .. ": " .. v .. "\n" )
    end
end

Take a look at this section in the Readme: Chained initialisation

Best regards
Roland.

[martin-damien]

I modified the code but I still have the same error:

class = require "vendors.30log.30log"

Card = class { __name = "Card" }

function Card:__init()
    self.test1 = "1"
end

Actor = Card:extends { __name = "Actor" }

function Actor:__init()
    Actor.super.__init()
    self.test2 = "2"
    for k, v in pairs( self ) do
        print( k .. ": " .. v .. "\n" )
    end
end

test = Actor()

And result is:

lua: test.lua:6: attempt to index local 'self' (a nil value)
stack traceback:
    test.lua:6: in function '__init'
    test.lua:12: in function '__init'
    ./vendors/30log/30log.lua:35: in function <./vendors/30log/30log.lua:32>
    (tail call): ?
    test.lua:19: in main chunk
    [C]: ?

For information I'm running Lua 5.1.4

[Yonaba]

Sorry Martin, my bad, I didn't give the correct code.
See the previous sample I gave, I just updated it.
As a matter of fact, you when you can to write a class constructor and you need to call its super class constructor, you will have to call explicitely the superclass itself, passing it the object to be instantiated.

function Subclass:__init(...)
  Superclass.super.__init(self)
  -- ... rest of the code
end

Sorry for the inconvenience.

Best regards,
Roland.

[martin-damien]

OK, thank you very much. It works now :)

[Yonaba]

Awesome. Thanks.