ch17.023_best

Perl Best Practices the source code

##############################################################################
##   Code fragment (Recommended) from Chapter 17 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 Payload;
# Only works under Perl 5.6.1 and later, but not 5.8.0
use only q{ 5.6.1-  !5.8.0 };     
 
# IO::Prompt  must be 0.2.0 or better, but not 0.3.1 to 0.3.3
use only 'IO::Prompt' => q{ 0.2-  !0.3.1-0.3.3 },  qw( prompt ); 
 
# Benchmark must be no later than version 1.52
use only Benchmark => q{ -1.52 },  qw( cmpthese );