From: Robert Klemme <shortcutter@...>
Date: 2010-09-16T00:13:50+09:00
Subject: Re: property short cut for read-ony instance access, but....

On Wed, Sep 15, 2010 at 4:46 PM, Gene Angelo <web.gma@gmail.com> wrote:
> Hello,
>
> Is there a short cut for creating a property that has read-only access
> from instance variables and read/write access for derived classes?
>
> Was looking for something like...
>
> attr_reader :prompt
> attr_writer protected :prompt
>
> or am I doomed to do it this way...
>
> #...
> def prompt
>   @prompt
> end
>
> def prompt=(value)
>   @prompt=value
> end
> protected :prompt=
> #...

With a little meta programming you can do

class Module
  def attr_protected *names
    attr_accessor *names
    protected *names.map {|n| "#{n}="}
  end
end

and use it like

class A
  attr_protected :foo, :bar
end

Kind regards

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/