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
$key
. Normally this will returnundef
when there is no value for the$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 thatmeta()
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 https://github.com/Test-More/test-more/.
MAINTAINERS
AUTHORS
COPYRIGHT
Copyright 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.