From: 7stud -- <dolgun@...>
Date: 2007-09-22T11:13:00+09:00
Subject: Re: Break loop by trapping INT

Morton Goldberg wrote:
> When the trap is triggered, the trap's proc object receives a 'call'
> message. This happens in the scope of top level, not in the scope of
> the while block. To get the result you want, you need to invoke a non-
> local jump mechanism. This can be done with catch and throw.
> 
> trap('INT') { puts "done";  throw :quit }
> 
> count = 0
> catch :quit do
>     while count < 10;
>        puts count += 1
>        sleep 1
>     end
> end

Yikes!  Isn't that using catch/throw as a plain vanilla goto?
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