From: Robert Klemme <bob.news@...>
Date: 2004-12-15T00:37:17+09:00
Subject: Re: Mixin questions


"Kent Sibilev" <ksibilev@bellsouth.net> schrieb im Newsbeitrag
news:07703F80-4DE5-11D9-B79B-000A95C700E8@bellsouth.net...
> 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.

No.  Note the fine difference between include and extend (see code below).
But anyway thanks for calling.

Also, with a little magic you can add class and instance methods either
way (i.e. with include and extend).

Kind regards

    robert


> 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
> >
> >
>
>
>