Moose::Meta::Attribute::Native::Trait::Bool(3)
                                           User Contributed Perl Documentation


NAME
       Moose::Meta::Attribute::Native::Trait::Bool - Helper trait for Bool
       attributes

VERSION
       version 2.4000

SYNOPSIS
         package Room;
         use Moose;

         has 'is_lit' => (
             traits  => ['Bool'],
             is      => 'rw',
             isa     => 'Bool',
             default => 0,
             handles => {
                 illuminate  => 'set',
                 darken      => 'unset',
                 flip_switch => 'toggle',
                 is_dark     => 'not',
             },
         );

         my $room = Room->new();
         $room->illuminate;        # same as $room->is_lit(1);
         $room->darken;            # same as $room->is_lit(0);
         $room->flip_switch;       # same as $room->is_lit(not $room->is_lit);
         return $room->is_dark;    # same as !$room->is_lit

DESCRIPTION
       This trait provides native delegation methods for boolean values. A
       boolean is a scalar which can be 1, 0, "", or "undef".

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

PROVIDED METHODS
       None of these methods accept arguments.

       o   set

           Sets the value to 1 and returns 1.

       o   unset

           Set the value to 0 and returns 0.

       o   toggle

           Toggles the value. If it's true, set to false, and vice versa.

           Returns the new value.

       o   not

           Equivalent of 'not $value'.

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

AUTHORS
       o   Stevan Little <stevan@cpan.org>

       o   Dave Rolsky <autarch@urth.org>

       o   Jesse Luehrs <doy@cpan.org>

       o   Shawn M Moore <sartak@cpan.org>

       o   <?><?><?><?> <?><?><?>'<?><?> (Yuval Kogman)
           <nothingmuch@woobling.org>

       o   Karen Etheridge <ether@cpan.org>

       o   Florian Ragwitz <rafl@debian.org>

       o   Hans Dieter Pearcey <hdp@cpan.org>

       o   Chris Prather <chris@prather.org>

       o   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.

perl v5.42.2                      2026-06-15
                                Moose::Meta::Attribute::Native::Trait::Bool(3)