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Moose::Util::MetaRole(3pm) User Contributed Perl Documentation Moose::Util::MetaRole(3pm)
NAME
Moose::Util::MetaRole - Apply roles to any metaclass, as well as the object base class
SYNOPSIS
package MyApp::Moose;
use Moose ();
use Moose::Exporter;
use Moose::Util::MetaRole;
use MyApp::Role::Meta::Class;
use MyApp::Role::Meta::Method::Constructor;
use MyApp::Role::Object;
Moose::Exporter->setup_import_methods( also => 'Moose' );
sub init_meta {
shift;
my %options = @_;
Moose->init_meta(%options);
Moose::Util::MetaRole::apply_metaclass_roles(
for_class => $options{for_class},
metaclass_roles => ['MyApp::Role::Meta::Class'],
constructor_class_roles => ['MyApp::Role::Meta::Method::Constructor'],
);
Moose::Util::MetaRole::apply_base_class_roles(
for_class => $options{for_class},
roles => ['MyApp::Role::Object'],
);
return $options{for_class}->meta();
}
DESCRIPTION
This utility module is designed to help authors of Moose extensions write extensions that
are able to cooperate with other Moose extensions. To do this, you must write your
extensions as roles, which can then be dynamically applied to the caller's metaclasses.
This module makes sure to preserve any existing superclasses and roles already set for the
meta objects, which means that any number of extensions can apply roles in any order.
USAGE
It is very important that you only call this module's functions when your module is
imported by the caller. The process of applying roles to the metaclass reinitializes the
metaclass object, which wipes out any existing attributes already defined. However, as
long as you do this when your module is imported, the caller should not have any
attributes defined yet.
The easiest way to ensure that this happens is to use Moose::Exporter, which can generate
the appropriate "init_meta" method for you, and make sure it is called when imported.
FUNCTIONS
This module provides two functions.
apply_metaclass_roles( ... )
This function will apply roles to one or more metaclasses for the specified class. It
accepts the following parameters:
o for_class => $name
This specifies the class for which to alter the meta classes.
o metaclass_roles => \@roles
o attribute_metaclass_roles => \@roles
o method_metaclass_roles => \@roles
o wrapped_method_metaclass_roles => \@roles
o instance_metaclass_roles => \@roles
o constructor_class_roles => \@roles
o destructor_class_roles => \@roles
o application_to_class_class_roles => \@roles
o application_to_role_class_roles => \@roles
o application_to_instance_class_roles => \@roles
These parameter all specify one or more roles to be applied to the specified
metaclass. You can pass any or all of these parameters at once.
apply_base_class_roles( for_class => $class, roles => \@roles )
This function will apply the specified roles to the object's base class.
AUTHOR
Dave Rolsky <autarch AT urth.org>
COPYRIGHT AND LICENSE
Copyright 2009 by Infinity Interactive, Inc.
<http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify it under the same
terms as Perl itself.
perl v5.10.0 2009-11-18 Moose::Util::MetaRole(3pm)
Generated by $Id: phpMan.php,v 4.49 2006/02/26 13:18:18 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2012-05-24 19:52 @38.107.179.239 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)