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Mouse::Role(3pm)					User Contributed Perl Documentation					  Mouse::Role(3pm)

NAME
Mouse::Role - The Mouse Role VERSION
This document describes Mouse version 0.99 SYNOPSIS
package Comparable; use Mouse::Role; # the package is now a Mouse role # Declare methods that are required by this role requires qw(compare); # Define methods this role provides sub equals { my($self, $other) = @_; return $self->compare($other) == 0; } # and later package MyObject; use Mouse; with qw(Comparable); # Now MyObject can equals() sub compare { # ... } my $foo = MyObject->new(); my $bar = MyObject->new(); $obj->equals($bar); # yes, it is comparable DESCRIPTION
This module declares the caller class to be a Mouse role. The concept of roles is documented in Moose::Manual::Roles. This document serves as API documentation. EXPORTED FUNCTIONS
Mouse::Role supports all of the functions that Mouse exports, but differs slightly in how some items are handled (see "CAVEATS" below for details). Mouse::Role also offers two role-specific keywords: "requires(@method_names)" Roles can require that certain methods are implemented by any class which "does" the role. Note that attribute accessors also count as methods for the purposes of satisfying the requirements of a role. "excludes(@role_names)" This is exported but not implemented in Mouse. IMPORT AND UNIMPORT
import Importing Mouse::Role will give you sugar. "-traits" are also supported. unimport Please unimport ("no Mouse::Role") so that if someone calls one of the keywords (such as "has") it will break loudly instead breaking subtly. CAVEATS
Role support has only a few caveats: o Roles cannot use the "extends" keyword; it will throw an exception for now. The same is true of the "augment" and "inner" keywords (not sure those really make sense for roles). All other Mouse keywords will be deferred so that they can be applied to the consuming class. o Role composition does its best to not be order-sensitive when it comes to conflict resolution and requirements detection. However, it is order-sensitive when it comes to method modifiers. All before/around/after modifiers are included whenever a role is composed into a class, and then applied in the order in which the roles are used. This also means that there is no conflict for before/around/after modifiers. In most cases, this will be a non-issue; however, it is something to keep in mind when using method modifiers in a role. You should never assume any ordering. SEE ALSO
Mouse Moose::Role Moose::Manual::Roles Moose::Spec::Role perl v5.14.2 2012-06-30 Mouse::Role(3pm)

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Moose::Role(3)						User Contributed Perl Documentation					    Moose::Role(3)

NAME
Moose::Role - The Moose Role VERSION
version 2.0205 SYNOPSIS
package Eq; use Moose::Role; # automatically turns on strict and warnings requires 'equal'; sub no_equal { my ($self, $other) = @_; !$self->equal($other); } # ... then in your classes package Currency; use Moose; # automatically turns on strict and warnings with 'Eq'; sub equal { my ($self, $other) = @_; $self->as_float == $other->as_float; } # ... and also package Comparator; use Moose; has compare_to => ( is => 'ro', does => 'Eq', handles => 'Eq', ); # ... which allows my $currency1 = Currency->new(...); my $currency2 = Currency->new(...); Comparator->new(compare_to => $currency1)->equal($currency2); DESCRIPTION
The concept of roles is documented in Moose::Manual::Roles. This document serves as API documentation. EXPORTED FUNCTIONS
Moose::Role currently supports all of the functions that Moose exports, but differs slightly in how some items are handled (see "CAVEATS" below for details). Moose::Role also offers two role-specific keyword exports: requires (@method_names) Roles can require that certain methods are implemented by any class which "does" the role. Note that attribute accessors also count as methods for the purposes of satisfying the requirements of a role. excludes (@role_names) Roles can "exclude" other roles, in effect saying "I can never be combined with these @role_names". This is a feature which should not be used lightly. unimport Moose::Role offers a way to remove the keywords it exports, through the "unimport" method. You simply have to say "no Moose::Role" at the bottom of your code for this to work. METACLASS
When you use Moose::Role, you can specify traits which will be applied to your role metaclass: use Moose::Role -traits => 'My::Trait'; This is very similar to the attribute traits feature. When you do this, your class's "meta" object will have the specified traits applied to it. See "Metaclass and Trait Name Resolution" in Moose for more details. APPLYING ROLES
In addition to being applied to a class using the 'with' syntax (see Moose::Manual::Roles) and using the Moose::Util 'apply_all_roles' method, roles may also be applied to an instance of a class using Moose::Util 'apply_all_roles' or the role's metaclass: MyApp::Test::SomeRole->meta->apply( $instance ); Doing this creates a new, mutable, anonymous subclass, applies the role to that, and reblesses. In a debugger, for example, you will see class names of the form " Moose::Meta::Class::__ANON__::SERIAL::6 ", which means that doing a 'ref' on your instance may not return what you expect. See Moose::Object for 'DOES'. Additional params may be added to the new instance by providing 'rebless_params'. See Moose::Meta::Role::Application::ToInstance. CAVEATS
Role support has only a few caveats: o Roles cannot use the "extends" keyword; it will throw an exception for now. The same is true of the "augment" and "inner" keywords (not sure those really make sense for roles). All other Moose keywords will be deferred so that they can be applied to the consuming class. o Role composition does its best to not be order-sensitive when it comes to conflict resolution and requirements detection. However, it is order-sensitive when it comes to method modifiers. All before/around/after modifiers are included whenever a role is composed into a class, and then applied in the order in which the roles are used. This also means that there is no conflict for before/around/after modifiers. In most cases, this will be a non-issue; however, it is something to keep in mind when using method modifiers in a role. You should never assume any ordering. BUGS
See "BUGS" in Moose for details on reporting bugs. AUTHOR
Stevan Little <stevan@iinteractive.com> COPYRIGHT AND LICENSE
This software is copyright (c) 2011 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. perl v5.12.5 2011-09-06 Moose::Role(3)
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