From: Nikolai Weibull <mailing-lists.ruby-talk@...>
Date: 2005-05-18T00:51:30+09:00
Subject: Re: Help regarding def wrapper

Gavin Kistner wrote:

> On May 17, 2005, at 7:52 AM, Nikolai Weibull wrote:

> > I���d like to have a def that I can scope in one go, i.e.,
> >
> > class A
> >  scoped_def :private, :a do
> >    ���
> >  end
> > end

> What do you prefer about the above, versus the existing (and, IMO,  
> slightly prettier):
>
> class A
>     private; def meth1( arg1, arg2=:foo )
>         'private'
>     end
> 
>     protected; def meth2( arg1, arg2='bar' )
>         'protected'
>     end
> 
>     public; def meth2( arg1, arg2 )
>         'public'
>     end
> end

Well, the visibility will affect all methods defined after it and I
really want to intermingle methods of varying visibility, i.e., not, as
you suggest below, to group them by visibility.

> With your technique, you cannot declare default values for arguments,  
> correct? (At least, not in blocks in 1.8)
> 
> And while the above syntax that I wrote is close to yours, I further  
> personally prefer using the public/protected/private items as they  
> were intended, to denote blocks of methods in my class which are  
> each, visually grouping like-scoped methods.

Actually, I���d argue that this isn���t how they were intended, as that is a
behavior that these methods take upon themselves if not passed any
arguments.  Looking at the standard library, there are thirty instances
of private being used as below and ninety-one instances of the

  private :name1, :name2, ���

kind.

> class A
>     def public1; ...; end
>     def public2; ...; end
> 
>     protected
>         def protected1; ...; end
>         def protected2; ...; end
> 
>     private
>         def private1; ...; end
>         def private2; ...; end
> end

Anyway, thanks for your input,
        nikolai

-- 
Nikolai Weibull: now available free of charge at http://bitwi.se/!
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