Moose::Meta::Attribute::Native::Trait::Counter - Helper trait for counters
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 );
This module provides a simple counter attribute, which can be incremented and decremented.
If your attribute definition does not include any of is, isa, default or handles but does use the Counter trait, then this module applies defaults as in the "SYNOPSIS" above. This allows for a very basic counter definition:
Counter
has 'foo' => (traits => ['Counter']); $obj->inc_foo;
These methods are implemented in Moose::Meta::Attribute::Native::MethodProvider::Counter. It is important to note that all those methods do in place modification of the value stored in the attribute.
Set the counter to the specified value.
Increments the value stored in this slot by 1. Providing an argument will cause the counter to be increased by specified amount.
Decrements the value stored in this slot by 1. Providing an argument will cause the counter to be increased by specified amount.
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 <stevan@iinteractive.com>
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.
To install Moose, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Moose
CPAN shell
perl -MCPAN -e shell install Moose
For more information on module installation, please visit the detailed CPAN module installation guide.