From: Gennady <gfb@...>
Date: 2003-05-09T08:51:29+09:00
Subject: Re: Can a global be a constant?

It seems like you missed David Black's post, it may be the neat solution you
are looking for:
http://www.ruby-talk.org/cgi-bin/scat.rb/ruby/ruby-talk/71000

Gennady.

----- Original Message ----- 
From: "Jim Freeze" <jim@freeze.org>
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
Sent: Thursday, May 08, 2003 4:37 PM
Subject: Re: Can a global be a constant?


> On Friday,  9 May 2003 at  8:23:52 +0900, Hal E. Fulton wrote:
> >
> > Not a stupid question... maybe my assumptions
> > don't work for you, but what I was thinking
> > was something like:
> >
> > class State
> >   @@debug = nil
> >   @@verbose = nil
> >
> >   def State.debug
> >     @@debug
> >   end
> >
> >   def State.debug=(val)
> >     @@debug = val
> >   end
> >
> >   def State.verbose
> >     @@verbose
> >   end
> >
> >   def State.verbose=(val)
> >     @@verbose = val
> >   end
> >
> > class App
> >   def main
> >     State.debug = true
> >     State.verbose = false
> >     Work.new
> >   end
> > end
> >
> > class Work
> >   def initialize
> >     puts State.debug
> >   end
> > end
> >
> > App.new.main
> >
> >
> > Hal
>
> Yes. That is the truly global solution. I was
> trying to do that but was getting lost somewhere.
>
> Is there a neater (read more concise) way to define State with
> maybe a << class_attr_accessor maybe?
>
> A couple of requirements that would be nice:
>   1) Only the creator of the state can change it
>   2) Classes at most have to do an include to get
>      access to the state.
>
> -- 
> Jim Freeze
> ----------
> VMS is like a nightmare about RSX-11M.
>
>