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

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

version 2.2011

  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

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

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

None of these methods accept arguments.
set
Sets the value to 1 and returns 1.
unset
Set the value to 0 and returns 0.
toggle
Toggles the value. If it's true, set to false, and vice versa.
Returns the new value.
not
Equivalent of 'not $value'.

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

Stevan Little <stevan.little@iinteractive.com>
Dave Rolsky <autarch@urth.org>
Jesse Luehrs <doy@tozt.net>
Shawn M Moore <code@sartak.org>
יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>
Karen Etheridge <ether@cpan.org>
Florian Ragwitz <rafl@debian.org>
Hans Dieter Pearcey <hdp@weftsoar.net>
Chris Prather <chris@prather.org>
Matt S Trout <mst@shadowcat.co.uk>

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.
2018-05-16 perl v5.28.1

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