From: Chad Fowler <chad@...>
Date: 2004-03-13T05:28:40+09:00
Subject: Re: Win32OLE bug

On Sat, 13 Mar 2004, Bret Pettichord wrote:

# >
# >form = callcc do |cc|		#1
# >   ie.document.forms.each do |form|	#2
# >     if(form.action == "start")	#3
# >       cc.call(form)			#4
# >     end				#5
# >    end				#6
# >end					#7
# >
# >puts form.inspect
# >"#<WIN32OLE:0x28bcf48"
# >
# >
# >Chad
# 
# Thanks Chad. I actually included my workaround in my original post (but 
# which kent snipped). I don't understand what you have here. 

Line one of my example assigns the result of the #callcc invocation to the 
"form" variable.  callcc stands for "call with current continuation".  The 
continuation (to simplify) is a complete snapshot of state at a current 
point in time (including the position of execution).  Executing the #call 
method on the continuation returns to the point directly after the #callcc 
invocation, unwinding the call stack, and any arguments passed into #call 
(such as "form" in line 4) are the return values from the #callcc 
invocation itself.  

Jim Weirch has a much more lucid explanation here:
http://onestepback.org/index.cgi/Tech/Programming/Kata/KataTwoCallCC.rdoc

Alternatively, for this example, you could use throw and catch.

Chad