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 ); 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.
isa
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.
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.
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.
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cpanm
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CPAN shell
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