From: nobu.nokada@...
Date: 2002-12-18T19:44:13+09:00
Subject: Re: $SAFE block?

Hi,

At Wed, 18 Dec 2002 18:59:21 +0900,
Tim Bates wrote:
> Once $SAFE is set to a certain level, it's not possible to lower it again. As 
> far as I know, the only way to execute some code at a high $SAFE level and 
> then return to a lower one is like this:
> 
> thread = Thread.new {
> 	$SAFE = 4
> 	# .. do code
> }
> thread.join
> 
> Which is messy to say the least. Why not have something like:
> 
> Kernel#safe(anInteger) { block }

module Kernel
  def safe(level)
    proc {$SAFE = level; yield}.call
  end
end

p Thread.current.safe_level		# => 0
p safe(4) { Thread.current.safe_level }	# => 4
p Thread.current.safe_level		# => 0

-- 
Nobu Nakada