[MacRuby-devel] #init & #initialize

[Laurent Sansonetti]

Hi Eloy,

On May 17, 2008, at 6:55 AM, Eloy Duran wrote:

> In the RubyCocoa layer I would like to have #initialize called from
> #init,
> because in RC it was allowed to use #initialize and thus many classes
> do this.
>
> Anyways, here's some test code, please note the comments and the
> output which are basically my questions :)
>
> Cheers,
> Eloy
>
> #!/usr/local/bin/macruby
>
> class Foo
>   def init
>     if super
>       puts 'Foo init'
>       self
>     end
>   end
>
>   def initialize
>     puts 'Object'
>   end
> end
>
> class Bar < NSObject
>   def init
>     if super
>       puts 'Bar init'
>       self
>     end
>   end
>
>   def initialize
>     puts 'NSObject'
>   end
> end
>
> # Calls only initialize which is a good thing because it's a "Object"
> subclass.
> Foo.new
> # => Object

#init should be called there. It's a bug. In MacRuby, Object is a  
subclass of NSObject. All objects are therefore NSObject subclasses.

> # Calling new on a NSObject subclass calls initialize, but NOT  
> init!!!??
> Bar.new
> # => NSObject

Same than above.

> # Calls only init and NO initialize
> Bar.alloc.init
> # => Bar init

#initialize should be called there.

So, these are bugs. We need to fix them :) I guess it would be easier  
to plug the new machinery once we use the objc dispatcher for  
everything (currently we still dispatch Ruby methods separately).

Laurent