NAME

Moose::Util::MetaRole - Apply roles to any metaclass, as well as the object base class

VERSION

version 2.1605

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 %args = @_;
  
      Moose->init_meta(%args);
  
      Moose::Util::MetaRole::apply_metaroles(
          for             => $args{for_class},
          class_metaroles => {
              class       => ['MyApp::Role::Meta::Class'],
              constructor => ['MyApp::Role::Meta::Method::Constructor'],
          },
      );
  
      Moose::Util::MetaRole::apply_base_class_roles(
          for   => $args{for_class},
          roles => ['MyApp::Role::Object'],
      );
  
      return $args{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

The easiest way to use this module is through 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_metaroles( ... )

This function will apply roles to one or more metaclasses for the specified class. It will return a new metaclass object for the class or role passed in the "for" parameter.

It accepts the following parameters:

apply_base_class_roles( for => $class, roles => \@roles )

This function will apply the specified roles to the object's base class.

BUGS

See "BUGS" in Moose for details on reporting bugs.

AUTHORS

COPYRIGHT AND LICENSE

This software is copyright (c) 2006 by Infinity Interactive, Inc.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.