Moose::Meta::Attribute::Native::Trait::Counter(3p)

NAME
Moose::Meta::Attribute::Native::Trait::Counter - Helper trait for Int attributes which represent counters

VERSION
version 2.2201

SYNOPSIS
  package MyHomePage;
  use Moose;

  has 'counter' => (
      traits  => ['Counter'],
      is      => 'ro',
      isa     => 'Num',
      default => 0,
      handles => {
          inc_counter   => 'inc',
          dec_counter   => 'dec',
          reset_counter => 'reset',
      },
  );

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

  my $count_by_twos = 2;
  $page->inc_counter($count_by_twos);

DESCRIPTION
This trait provides native delegation methods for counters. A counter can be any sort of number (integer or not). The delegation methods allow you to increment, decrement, or reset the value.

DEFAULT TYPE
If you don't provide an "isa" value for your attribute, it will default to "Num".

PROVIDED METHODS

•   set($value)

    Sets the counter to the specified value and returns the new value.

    This method requires a single argument.

•   inc

•   inc($arg)

    Increases the attribute value by the amount of the argument, or by 1 if no argument is given. This method returns the new value.

    This method accepts a single argument.

•   dec

•   dec($arg)

    Decreases the attribute value by the amount of the argument, or by 1 if no argument is given. This method returns the new value.

    This method accepts a single argument.

•   reset

    Resets the value stored in this slot to its default value, and returns the new value.

BUGS
See "BUGS" in Moose for details on reporting bugs.

AUTHORS

•   Stevan Little <stevan@cpan.org>

•   Dave Rolsky <autarch@urth.org>

•   Jesse Luehrs <doy@cpan.org>

•   Shawn M Moore <sartak@cpan.org>

•   יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>

•   Karen Etheridge <ether@cpan.org>

•   Florian Ragwitz <rafl@debian.org>

•   Hans Dieter Pearcey <hdp@cpan.org>

•   Chris Prather <chris@prather.org>

•   Matt S Trout <mstrout@cpan.org>

COPYRIGHT AND LICENSE
This software is copyright (c) 2006 by Infinity Interactive, Inc.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.