#!/usr/bin/perl
# Fig. 14.22: Queue.pm
# Implementation of queue using a tied scalar.

package Queue;
use strict;
use warnings;

sub TIESCALAR
{
   my ( $class ) = shift();
   my @data = split( ' ', $_[ 0 ] );

   bless( \@data, $class );
   return \@data;
}

sub STORE
{
   my $obj = shift();
   my $data = shift();

   push( @$obj, $data );
}

sub FETCH
{
   my $obj = shift();
   return shift( @$obj );
}

return 1;

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