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.\"
.IX Title "Moose::Meta::Attribute::Native::Trait::Counter 3pm"
.TH Moose::Meta::Attribute::Native::Trait::Counter 3pm "2023-01-30" "perl v5.36.0" "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::Counter \- Helper trait for Int attributes which represent counters
.SH "VERSION"
.IX Header "VERSION"
version 2.2203
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&  package MyHomePage;
\&  use Moose;
\&
\&  has \*(Aqcounter\*(Aq => (
\&      traits  => [\*(AqCounter\*(Aq],
\&      is      => \*(Aqro\*(Aq,
\&      isa     => \*(AqNum\*(Aq,
\&      default => 0,
\&      handles => {
\&          inc_counter   => \*(Aqinc\*(Aq,
\&          dec_counter   => \*(Aqdec\*(Aq,
\&          reset_counter => \*(Aqreset\*(Aq,
\&      },
\&  );
\&
\&  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);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
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.
.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`Num\*(C'\fR.
.SH "PROVIDED METHODS"
.IX Header "PROVIDED METHODS"
.IP "\(bu" 4
\&\fBset($value)\fR
.Sp
Sets the counter to the specified value and returns the new value.
.Sp
This method requires a single argument.
.IP "\(bu" 4
\&\fBinc\fR
.IP "\(bu" 4
\&\fBinc($arg)\fR
.Sp
Increases the attribute value by the amount of the argument, or by 1 if no
argument is given. This method returns the new value.
.Sp
This method accepts a single argument.
.IP "\(bu" 4
\&\fBdec\fR
.IP "\(bu" 4
\&\fBdec($arg)\fR
.Sp
Decreases the attribute value by the amount of the argument, or by 1 if no
argument is given. This method returns the new value.
.Sp
This method accepts a single argument.
.IP "\(bu" 4
\&\fBreset\fR
.Sp
Resets the value stored in this slot to its default value, and returns the new
value.
.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.