Moose::Meta::Attribute::Native::Trait::Counter

version 2.1005

  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);

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.

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

• 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.

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

Moose is maintained by the Moose Cabal, along with the help of many contributors. See "CABAL" in Moose and "CONTRIBUTORS" in Moose for details.

This software is copyright (c) 2013 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.