Moose is an excellent suggestion. 

#!/usr/bin/perl

use strict;
use warnings;

my $red = Apple->new( color => 'green'  );
my $yel = Apple->new( color => 'yellow' );

$red->color( 'red' ); # It got ripe.

my $foo = Orange->new();
my $baz = Orange->new( apple => $red ); 

for my $obj ( $red, $yel, $foo, $baz ) {
    print 'served: ', $obj->serve, "\n";
}

print "\n fruit stand: \n",
    map $_->dump, $red, $yel, $foo, $baz;


BEGIN {
    package Apple;

    use Moose;
    use namespace::autoclean;

    has 'color' => (
        is => 'rw',
        isa => 'Str',
    );

    sub serve {
        return 'sliced';
    }

    __PACKAGE__->meta->make_immutable;
    1;
}

BEGIN {
    package Orange;

    use Moose;
    use namespace::autoclean;

    has 'apple' => (
        is => 'ro',
        isa => 'Apple',
        predicate => 'has_apple',
    );

    has 'shape' => (
        is => 'ro',
        isa => 'Str',
    );

    sub serve {
        my $self = shift;
        return $self->has_apple 
             ? $self->apple->serve() 
             : 'squeezed';
    }

    __PACKAGE__->meta->make_immutable;
    1;
}

[download]

I like to put all my extra packages in BEGIN blocks since it makes them as much work as much like they were used as possible. I also put the trailing true value in, so that I can grab them and dump them straight into a separate file if it should become desirable to break them out. This simple step has prevented me from having to rerun zillions of tests via make test and prove


TGI says moo

In reply to Re^2: Perl OO best practice? by TGI
in thread Perl OO best practice? by smile4me

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