ch15.060_prob

Perl Best Practices the source code

##############################################################################
## Code fragment (NOT RECOMMENDED) from Chapter 15 of "Perl Best Practices" ##
##     Copyright (c) O'Reilly & Associates, 2005. All Rights Reserved.      ##
##  See: http://www.oreilly.com/pub/a/oreilly/ask_tim/2001/codepolicy.html  ##
##############################################################################


# Standard modules...
use strict;
use warnings;
use IO::Prompt;
use Carp;
use English qw( -no_match_vars );
use Data::Alias;
use Readonly;


package Dogtag;
use Class::Std::Utils;
{
    # Attributes...
    my %name_of;
    my %rank_of;
    my %serial_num_of;
 
    # The usual inside-out constructor...
    sub new {
        my ($class, $arg_ref) = @_;
 
        my $new_object = bless anon_scalar(), $class;
 
        # Now using special objects to ensure serial numbers are unique...
        $serial_num_of{ident $new_object} = new Unique::ID;
 
        return $new_object;
    }

}

Dogtag->new();