MooseX::AttributeHelpers::Trait::Counter (3pm)

  package MyHomePage;
  use Moose;
  use MooseX::AttributeHelpers;

  has 'counter' => (
      metaclass => 'Counter',
      is        => 'ro',
      isa       => 'Num',
      default   => sub { 0 },
      provides  => {
          inc => 'inc_counter',
          dec => 'dec_counter',
          reset => 'reset_counter',
      }
  );

  my $page = MyHomePage->new();
  $page->inc_counter; # same as $page->counter($page->counter + 1);
  $page->dec_counter; # same as $page->counter($page->counter - 1);

This module provides a simple counter attribute, which can be incremented and decremeneted.

If your attribute definition does not include any of is, isa, default or provides but does use the \*(C`Counter\*(C' metaclass, then this module applies defaults as in the \*(L"\s-1SYNOPSIS\s0\*(R" above. This allows for a very basic counter definition:

has 'foo' => (metaclass => 'Counter'); $obj->inc_foo;

meta

method_provider

has_method_provider

helper_type

process_options_for_provides

Run before its superclass method.

check_provides_values

Run after its superclass method.

It is important to note that all those methods do in place modification of the value stored in the attribute.

set

Set the counter to the specified value.

inc

Increments the value stored in this slot by 1. Providing an argument will cause the counter to be increased by specified amount.

dec

Decrements the value stored in this slot by 1. Providing an argument will cause the counter to be increased by specified amount.

reset

Resets the value stored in this slot to it's default value.

All complex software has bugs lurking in it, and this module is no exception. If you find a bug please either email me, or add the bug to cpan-RT.

Stevan Little <[email protected]>

Copyright 2007-2009 by Infinity Interactive, Inc.

<http://www.iinteractive.com>

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.