From: Joel VanderWerf <vjoel@...>
Date: 2003-07-07T07:24:02+09:00
Subject: Re: Freezing an arbitary object

Brian Candler wrote:

> - local variables: cannot be frozen, since they don't belong to an object
>   and are not an object themselves. They can always be reassigned to point
>   to another object. Sorry, that's a Ruby fact of life.

I wonder why this doesn't work? I didn't expect it to, but I'm curious.

irb(main):005:0> b = binding
#<Binding:0x401d7e7c>
irb(main):006:0> eval "y=1", b
1
irb(main):007:0> eval "y", b
1
irb(main):008:0> b.freeze
#<Binding:0x401d7e7c>
irb(main):009:0> eval "y=2", b
2

Would it be useful to be able to freeze the current binding? Disastrous? 
Inefficient?