From: Christoph <chr_news@...>
Date: 2002-08-26T22:06:16+09:00
Subject: Re: warning modifying constant & 'global constant'

"David Garamond" wrote in
....
> thanks matz.
>
> i want to protect some global variables without having to resort to
> setting $SAFE to 4. can we use some proxying mechanism, or override an
> object method to trap assignment/binding? freeze() only protect the
> object value, and does not prevent rebinding.

Actually freezing a class as a similar effect on its
class, local variables and constants

---
class A
    @@var = 3
    @var     = 2
   Var         =1
   freeze
   # for example
   p  @@var #  raises a TypeError  ...
 end
---


/Christoph