Newsgroups: comp.lang.perl
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!elroy.jpl.nasa.gov!jpl-devvax!lwall
From: lwall@jpl-devvax.jpl.nasa.gov (Larry Wall)
Subject: Re: Recursive use of iterators
Message-ID: <1991Apr9.044920.22700@jpl-devvax.jpl.nasa.gov>
Reply-To: lwall@jpl-devvax.JPL.NASA.GOV (Larry Wall)
Organization: Jet Propulsion Laboratory, Pasadena, CA
References: <1991Apr3.233616.11680@uvaarpa.Virginia.EDU>
Date: Tue, 9 Apr 1991 04:49:20 GMT

In article <1991Apr3.233616.11680@uvaarpa.Virginia.EDU> worley@compass.com writes:
: I was writing a recursive function that contained a foreach statement,
: so I made sure to localize the array it was iterating over:
: 
: 	local(@dependencies) = ...;
: 	foreach (@dependencies) {...}
: 
: Somewhat to my surprise, the recursive execution of the loop
: interfered with the proper operation of the outer execution.  I found
: that I have to localize the symbol table entry (if that's how you say
: it):
: 
: 	local(*dependencies);
: 	@dependencies = ...;
: 	foreach (@dependencies) {...}
: 
: This is probably not a bug, but it led me to wonder how you deal with
: recursive loops like:
: 
: 	foreach $i ($a .. $b) {...}

That's handled by translating internally to

	local(@_GEN_1) = ($a .. $b);
	foreach $i (@_GEN_1) {...}

Only when you use a bare array do you get the direct references into the array.
That still doesn't say why your original didn't work though...

Larry