Tie::RefHash(3)

NNAAMMEE
       Tie::RefHash - use references as hash keys

SSYYNNOOPPSSIISS
           require 5.004;
           use Tie::RefHash;
           tie HASHVARIABLE, 'Tie::RefHash', LIST;

           untie HASHVARIABLE;

DDEESSCCRRIIPPTTIIOONN
       This module provides the ability to use references as hash
       keys if you first tie the hash variable to this module.

       It is implemented using the standard perl TIEHASH
       interface.  Please see the tie entry in perlfunc(1) and
       perltie(1) for more information.

EEXXAAMMPPLLEE
           use Tie::RefHash;
           tie %h, 'Tie::RefHash';
           $a = [];
           $b = {};
           $c = \*main;
           $d = \"gunk";
           $e = sub { 'foo' };
           %h = ($a => 1, $b => 2, $c => 3, $d => 4, $e => 5);
           $a->[0] = 'foo';
           $b->{foo} = 'bar';
           for (keys %h) {
              print ref($_), "\n";
           }

AAUUTTHHOORR
       Gurusamy Sarathy        gsar@umich.edu

VVEERRSSIIOONN
       Version 1.2    15 Dec 1996

SSEEEE AALLSSOO
       perl(1), perlfunc(1), perltie(1)