#
# This software is Copyright 2005 by Elsevier Inc.  You may use it
# under the terms of the license at http://perl.plover.com/hop/LICENSE.txt .
#



###
### Iterator_memory_tracking
###

## Chapter 4 section 6.3.1

my %extant;
sub Iterator (&) { 
  my $creator = (caller)[3];
  $extant{$creator}++;
  print STDERR "+ $creator $extant{$creator}\n";
  return $_[0];
 }