Test2::Util::ExternalMeta(3pm) Perl Programmers Reference Guide
NAME
Test2::Util::ExternalMeta - Allow third party tools to safely attach
meta-data to your instances.
DESCRIPTION
This package lets you define a clear, and consistent way to allow third
party tools to attach meta-data to your instances. If your object
consumes this package, and imports its methods, then third party meta-
data has a safe place to live.
SYNOPSIS
package My::Object;
use strict;
use warnings;
use Test2::Util::ExternalMeta qw/meta get_meta set_meta delete_meta/;
...
Now to use it:
my $inst = My::Object->new;
$inst->set_meta(foo => 'bar');
my $val = $inst->get_meta('foo');
WHERE IS THE DATA STORED?
This package assumes your instances are blessed hashrefs, it will not
work if that is not true. It will store all meta-data in the "_meta"
key on your objects hash. If your object makes use of the "_meta" key
in its underlying hash, then there is a conflict and you cannot use
this package.
EXPORTS
$val = $obj->meta($key)
$val = $obj->meta($key, $default)
This will get the value for a specified meta $key. Normally this
will return "undef" when there is no value for the $key, however
you can specify a $default value to set when no value is already
set.
$val = $obj->get_meta($key)
This will get the value for a specified meta $key. This does not
have the $default overhead that meta() does.
$val = $obj->delete_meta($key)
This will remove the value of a specified meta $key. The old $val
will be returned.
$obj->set_meta($key, $val)
Set the value of a specified meta $key.
META-KEY RESTRICTIONS
Meta keys must be defined, and must be true when used as a boolean.
Keys may not be references. You are free to stringify a reference
"$ref" for use as a key, but this package will not stringify it for
you.
SOURCE
The source code repository for Test2 can be found at
http://github.com/Test-More/test-more/.
MAINTAINERS
Chad Granum <exodist@cpan.org>
AUTHORS
Chad Granum <exodist@cpan.org>
COPYRIGHT
Copyright 2020 Chad Granum <exodist@cpan.org>.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
See http://dev.perl.org/licenses/
perl v5.38.2 2023-11-28 Test2::Util::ExternalMeta(3pm)
perl 5.38.2 - Generated Fri Dec 13 14:09:34 CST 2024