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.IX Title "Moose::Meta::Attribute::Native::Trait::Bool 3"
.TH Moose::Meta::Attribute::Native::Trait::Bool 3 "2021-11-07" "perl v5.26.3" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Moose::Meta::Attribute::Native::Trait::Bool \- Helper trait for Bool attributes
.SH "VERSION"
.IX Header "VERSION"
version 2.2201
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&  package Room;
\&  use Moose;
\&
\&  has \*(Aqis_lit\*(Aq => (
\&      traits  => [\*(AqBool\*(Aq],
\&      is      => \*(Aqrw\*(Aq,
\&      isa     => \*(AqBool\*(Aq,
\&      default => 0,
\&      handles => {
\&          illuminate  => \*(Aqset\*(Aq,
\&          darken      => \*(Aqunset\*(Aq,
\&          flip_switch => \*(Aqtoggle\*(Aq,
\&          is_dark     => \*(Aqnot\*(Aq,
\&      },
\&  );
\&
\&  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
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This trait provides native delegation methods for boolean values. A boolean is
a scalar which can be \f(CW1\fR, \f(CW0\fR, \f(CW""\fR, or \f(CW\*(C`undef\*(C'\fR.
.SH "DEFAULT TYPE"
.IX Header "DEFAULT TYPE"
If you don't provide an \f(CW\*(C`isa\*(C'\fR value for your attribute, it will default to
\&\f(CW\*(C`Bool\*(C'\fR.
.SH "PROVIDED METHODS"
.IX Header "PROVIDED METHODS"
None of these methods accept arguments.
.IP "\(bu" 4
\&\fBset\fR
.Sp
Sets the value to \f(CW1\fR and returns \f(CW1\fR.
.IP "\(bu" 4
\&\fBunset\fR
.Sp
Set the value to \f(CW0\fR and returns \f(CW0\fR.
.IP "\(bu" 4
\&\fBtoggle\fR
.Sp
Toggles the value. If it's true, set to false, and vice versa.
.Sp
Returns the new value.
.IP "\(bu" 4
\&\fBnot\fR
.Sp
Equivalent of 'not \f(CW$value\fR'.
.SH "BUGS"
.IX Header "BUGS"
See \*(L"\s-1BUGS\*(R"\s0 in Moose for details on reporting bugs.
.SH "AUTHORS"
.IX Header "AUTHORS"
.IP "\(bu" 4
Stevan Little <stevan@cpan.org>
.IP "\(bu" 4
Dave Rolsky <autarch@urth.org>
.IP "\(bu" 4
Jesse Luehrs <doy@cpan.org>
.IP "\(bu" 4
Shawn M Moore <sartak@cpan.org>
.IP "\(bu" 4
יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>
.IP "\(bu" 4
Karen Etheridge <ether@cpan.org>
.IP "\(bu" 4
Florian Ragwitz <rafl@debian.org>
.IP "\(bu" 4
Hans Dieter Pearcey <hdp@cpan.org>
.IP "\(bu" 4
Chris Prather <chris@prather.org>
.IP "\(bu" 4
Matt S Trout <mstrout@cpan.org>
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
This software is copyright (c) 2006 by Infinity Interactive, Inc.
.PP
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.