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

       •   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>

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

       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.

perl v5.40.0                                       2024-10-20             Moose::Meta::At...:Trait::Counter(3pm)

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

       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.

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

       •   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.

         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);

       version 2.2207