ch16.049_best

来自「Perl Best Practices the source code」· 049_BEST 代码 · 共 45 行

##############################################################################
##   Code fragment (Recommended) from Chapter 16 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 Wax::Floor;
use Class::Std;
{
    sub feature_list :CUMULATIVE {
        return ('Long-lasting', 'Non-toxic', 'Polymer-based');
    }
}

package Topping::Dessert;
use Class::Std;
{
    sub feature_list :CUMULATIVE {
        return ('Low-carb', 'Non-dairy', 'Sugar-free');
    }
}

package Shimmer;
use Class::Std;
use base qw( Wax::Floor  Topping::Dessert );
{
    sub feature_list :CUMULATIVE {
        return ('Multi-purpose', 'Time-saving', 'Easy-to-use');
    }
}


my @features = Shimmer->feature_list();
print "Shimmer is the @features alternative!\n";