From: Kent Sibilev <ksibilev@...>
Date: 2004-12-15T00:30:11+09:00
Subject: Re: Mixin questions

By including a mixin module into a class you can add only instance  
methods unless you implement Module#append_features(or  
Module#included), if that's what you want to know.

Cheers,
Kent.

On Dec 14, 2004, at 7:52 AM, Johan Nilsson wrote:

>
> "Robert Klemme" <bob.news@gmx.net> wrote in message
> news:327uc2F3j9j3eU1@individual.net...
>>
>> "Johan Nilsson" <johan.nilsson@---.esrange.ssc.se> schrieb im  
>> Newsbeitrag
>> news:1103018684.0021a1444d2417eb0d9c6eddf9e60f0d@teranews...
>>> Hi,
>>>
>>> some newbie questions:
>>>
>>> - How can/should I access a class constant from a mixin? The only  
>>> thing
>> I've
>>> managed to get working is "const_get("name of const")".
>>> - Is it possible to access protected methods from mixins? I'm trying  
>>> to
>>> create a mixin alike the following:
>>>
>>> ---
>>> module StaticCreateMixin
>>>     def create_from(stuff)
>>>         obj = self.new
>>>         obj.my_stuff.<modifiying fn>!(stuff)
>>>         obj
>>>     end
>>> end
>>>
>>> class Foo
>>>     extend StaticCreateMixin
>>>
>>>     def my_stuff
>>>         @stuff
>>>     end
>>>
>>>     protected :my_stuff
>>> end
>>>
>>> f = Foo.static_create("some stuff")
>>
>> Your example misses something, does it?  It's not completely clear to  
>> me
>> what you want to do.  Or did you misspell create_from as  
>> static_create?
>
> Oops. Yes, I'm a very bad speller (or it could be the
> "extract-a-minimal-sample-from-actual-code-but-don't-bother-to-test- 
> it"-synd
> rome).
>
> In english, I want to create an instance of Foo from within the mixin's
> supplied class method. The first question still applies though.
>
> // Johan
>
>