Test2::Util::ExternalMeta - Allow third party tools to safely attach meta-data to your instances.
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');
Perl Programmers Reference Guide
Test2::Util::ExternalMeta(3)
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 2019 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/
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+-----------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-----------------------+
|Availability | runtime/perl-532 |
+---------------+-----------------------+
|Stability | Pass-through volatile |
+---------------+-----------------------+
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from
http://www.cpan.org/src/5.0/perl-5.32.0.tar.gz.
Further information about this software can be found on the open source
community website at https://www.perl.org/.
perl v5.32.0 2020-06-14
Test2::Util::ExternalMeta(3)