2 package Moose::Meta::Role;
8 use Scalar::Util 'blessed';
10 use Devel::GlobalDestruction 'in_global_destruction';
12 our $VERSION = '1.24';
13 $VERSION = eval $VERSION;
14 our $AUTHORITY = 'cpan:STEVAN';
16 use Moose::Meta::Class;
17 use Moose::Meta::Role::Attribute;
18 use Moose::Meta::Role::Method;
19 use Moose::Meta::Role::Method::Required;
20 use Moose::Meta::Role::Method::Conflicting;
21 use Moose::Meta::Method::Meta;
22 use Moose::Util qw( ensure_all_roles );
23 use Class::MOP::MiniTrait;
25 use base 'Class::MOP::Module',
26 'Class::MOP::Mixin::HasAttributes',
27 'Class::MOP::Mixin::HasMethods';
29 Class::MOP::MiniTrait::apply(__PACKAGE__, 'Moose::Meta::Object::Trait');
31 ## ------------------------------------------------------------------
33 ## I normally don't do this, but I am doing
34 ## a whole bunch of meta-programmin in this
35 ## module, so it just makes sense. For a clearer
36 ## picture of what is going on in the next
37 ## several lines of code, look at the really
38 ## big comment at the end of this file (right
41 ## ------------------------------------------------------------------
43 my $META = __PACKAGE__->meta;
45 ## ------------------------------------------------------------------
49 # since roles are lazy, we hold all the attributes
50 # of the individual role in 'statis' until which
51 # time when it is applied to a class. This means
52 # keeping a lot of things in hash maps, so we are
53 # using a little of that meta-programmin' magic
54 # here an saving lots of extra typin. And since
55 # many of these attributes above require similar
56 # functionality to support them, so we again use
57 # the wonders of meta-programmin' to deliver a
58 # very compact solution to this normally verbose
64 name => 'excluded_roles_map',
65 attr_reader => 'get_excluded_roles_map' ,
67 add => 'add_excluded_roles',
68 get_keys => 'get_excluded_roles_list',
69 existence => 'excludes_role',
73 name => 'required_methods',
74 attr_reader => 'get_required_methods_map',
76 remove => 'remove_required_methods',
77 get_values => 'get_required_method_list',
78 existence => 'requires_method',
83 my $attr_reader = $action->{attr_reader};
84 my $methods = $action->{methods};
86 # create the attribute
87 $META->add_attribute($action->{name} => (
88 reader => $attr_reader,
92 # create some helper methods
93 $META->add_method($methods->{add} => sub {
94 my ($self, @values) = @_;
95 $self->$attr_reader->{$_} = undef foreach @values;
96 }) if exists $methods->{add};
98 $META->add_method($methods->{get_keys} => sub {
100 keys %{$self->$attr_reader};
101 }) if exists $methods->{get_keys};
103 $META->add_method($methods->{get_values} => sub {
105 values %{$self->$attr_reader};
106 }) if exists $methods->{get_values};
108 $META->add_method($methods->{get} => sub {
109 my ($self, $name) = @_;
110 $self->$attr_reader->{$name}
111 }) if exists $methods->{get};
113 $META->add_method($methods->{existence} => sub {
114 my ($self, $name) = @_;
115 exists $self->$attr_reader->{$name} ? 1 : 0;
116 }) if exists $methods->{existence};
118 $META->add_method($methods->{remove} => sub {
119 my ($self, @values) = @_;
120 delete $self->$attr_reader->{$_} foreach @values;
121 }) if exists $methods->{remove};
124 $META->add_attribute(
126 reader => 'method_metaclass',
127 default => 'Moose::Meta::Role::Method',
130 $META->add_attribute(
131 'required_method_metaclass',
132 reader => 'required_method_metaclass',
133 default => 'Moose::Meta::Role::Method::Required',
136 $META->add_attribute(
137 'conflicting_method_metaclass',
138 reader => 'conflicting_method_metaclass',
139 default => 'Moose::Meta::Role::Method::Conflicting',
142 $META->add_attribute(
143 'application_to_class_class',
144 reader => 'application_to_class_class',
145 default => 'Moose::Meta::Role::Application::ToClass',
148 $META->add_attribute(
149 'application_to_role_class',
150 reader => 'application_to_role_class',
151 default => 'Moose::Meta::Role::Application::ToRole',
154 $META->add_attribute(
155 'application_to_instance_class',
156 reader => 'application_to_instance_class',
157 default => 'Moose::Meta::Role::Application::ToInstance',
160 # More or less copied from Moose::Meta::Class
165 if (defined(my $meta = Class::MOP::get_metaclass_by_name($pkg))) {
171 my $meta = $class->SUPER::initialize(
173 'attribute_metaclass' => 'Moose::Meta::Role::Attribute',
177 Class::MOP::weaken_metaclass($pkg) if $options{weaken};
186 my $meta = blessed $pkg ? $pkg : Class::MOP::class_of($pkg);
188 my %existing_classes;
190 %existing_classes = map { $_ => $meta->$_() } qw(
193 wrapped_method_metaclass
194 required_method_metaclass
195 conflicting_method_metaclass
196 application_to_class_class
197 application_to_role_class
198 application_to_instance_class
203 $options{weaken} = Class::MOP::metaclass_is_weak($meta->name)
204 if !exists $options{weaken}
206 && $meta->isa('Moose::Meta::Role');
208 # don't need to remove generated metaobjects here yet, since we don't
209 # yet generate anything in roles. this may change in the future though...
210 # keep an eye on that
211 my $new_meta = $self->SUPER::reinitialize(
216 $new_meta->_restore_metaobjects_from($meta)
217 if $meta && $meta->isa('Moose::Meta::Role');
221 sub _restore_metaobjects_from {
225 $self->_restore_metamethods_from($old_meta);
226 $self->_restore_metaattributes_from($old_meta);
228 for my $role ( @{ $old_meta->get_roles } ) {
229 $self->add_role($role);
236 if (blessed $_[0] && ! $_[0]->isa('Moose::Meta::Role::Attribute') ) {
237 my $class = ref $_[0];
238 Moose->throw_error( "Cannot add a $class as an attribute to a role" );
240 elsif (!blessed($_[0]) && defined($_[0]) && $_[0] =~ /^\+(.*)/) {
241 Moose->throw_error( "has '+attr' is not supported in roles" );
244 return $self->SUPER::add_attribute(@_);
247 sub _attach_attribute {
248 my ( $self, $attribute ) = @_;
250 $attribute->attach_to_role($self);
253 sub add_required_methods {
258 if (!blessed($method)) {
259 $method = $self->required_method_metaclass->new(
263 $self->get_required_methods_map->{$method->name} = $method;
267 sub add_conflicting_method {
271 if (@_ == 1 && blessed($_[0])) {
275 $method = $self->conflicting_method_metaclass->new(@_);
278 $self->add_required_methods($method);
281 ## ------------------------------------------------------------------
285 # the before/around/after method modifiers are
286 # stored by name, but there can be many methods
287 # then associated with that name. So again we have
288 # lots of similar functionality, so we can do some
289 # meta-programmin' and save some time.
292 foreach my $modifier_type (qw[ before around after ]) {
294 my $attr_reader = "get_${modifier_type}_method_modifiers_map";
296 # create the attribute ...
297 $META->add_attribute("${modifier_type}_method_modifiers" => (
298 reader => $attr_reader,
299 default => sub { {} }
302 # and some helper methods ...
303 $META->add_method("get_${modifier_type}_method_modifiers" => sub {
304 my ($self, $method_name) = @_;
305 #return () unless exists $self->$attr_reader->{$method_name};
306 my $mm = $self->$attr_reader->{$method_name};
310 $META->add_method("has_${modifier_type}_method_modifiers" => sub {
311 my ($self, $method_name) = @_;
313 # for now we assume that if it exists,..
314 # it has at least one modifier in it
315 (exists $self->$attr_reader->{$method_name}) ? 1 : 0;
318 $META->add_method("add_${modifier_type}_method_modifier" => sub {
319 my ($self, $method_name, $method) = @_;
321 $self->$attr_reader->{$method_name} = []
322 unless exists $self->$attr_reader->{$method_name};
324 my $modifiers = $self->$attr_reader->{$method_name};
327 # check to see that we aren't adding the
328 # same code twice. We err in favor of the
329 # first on here, this may not be as expected
330 foreach my $modifier (@{$modifiers}) {
331 return if $modifier == $method;
334 push @{$modifiers} => $method;
339 ## ------------------------------------------------------------------
340 ## override method mofidiers
342 $META->add_attribute('override_method_modifiers' => (
343 reader => 'get_override_method_modifiers_map',
344 default => sub { {} }
348 # these are a little different because there
349 # can only be one per name, whereas the other
350 # method modifiers can have multiples.
353 sub add_override_method_modifier {
354 my ($self, $method_name, $method) = @_;
355 (!$self->has_method($method_name))
356 || Moose->throw_error("Cannot add an override of method '$method_name' " .
357 "because there is a local version of '$method_name'");
358 $self->get_override_method_modifiers_map->{$method_name} = $method;
361 sub has_override_method_modifier {
362 my ($self, $method_name) = @_;
364 # for now we assume that if it exists,..
365 # it has at least one modifier in it
366 (exists $self->get_override_method_modifiers_map->{$method_name}) ? 1 : 0;
369 sub get_override_method_modifier {
370 my ($self, $method_name) = @_;
371 $self->get_override_method_modifiers_map->{$method_name};
374 ## general list accessor ...
376 sub get_method_modifier_list {
377 my ($self, $modifier_type) = @_;
378 my $accessor = "get_${modifier_type}_method_modifiers_map";
379 keys %{$self->$accessor};
382 sub reset_package_cache_flag { (shift)->{'_package_cache_flag'} = undef }
383 sub update_package_cache_flag {
385 $self->{'_package_cache_flag'} = Class::MOP::check_package_cache_flag($self->name);
389 sub _meta_method_class { 'Moose::Meta::Method::Meta' }
391 ## ------------------------------------------------------------------
394 $META->add_attribute('roles' => (
395 reader => 'get_roles',
396 default => sub { [] }
400 my ($self, $role) = @_;
401 (blessed($role) && $role->isa('Moose::Meta::Role'))
402 || Moose->throw_error("Roles must be instances of Moose::Meta::Role");
403 push @{$self->get_roles} => $role;
404 $self->reset_package_cache_flag;
407 sub calculate_all_roles {
413 $_->calculate_all_roles
414 } @{ $self->get_roles });
418 my ($self, $role) = @_;
420 || Moose->throw_error("You must supply a role name to look for");
421 my $role_name = blessed $role ? $role->name : $role;
422 # if we are it,.. then return true
423 return 1 if $role_name eq $self->name;
424 # otherwise.. check our children
425 foreach my $role (@{$self->get_roles}) {
426 return 1 if $role->does_role($role_name);
431 sub find_method_by_name { (shift)->get_method(@_) }
433 ## ------------------------------------------------------------------
435 ## ------------------------------------------------------------------
438 my ($self, $other, %args) = @_;
441 || Moose->throw_error("You must pass in an blessed instance");
443 my $application_class;
444 if ($other->isa('Moose::Meta::Role')) {
445 $application_class = $self->application_to_role_class;
447 elsif ($other->isa('Moose::Meta::Class')) {
448 $application_class = $self->application_to_class_class;
451 $application_class = $self->application_to_instance_class;
454 Class::MOP::load_class($application_class);
456 my $deprecation_check = 0;
458 if ( exists $args{excludes} && !exists $args{'-excludes'} ) {
459 $args{'-excludes'} = delete $args{excludes};
460 $deprecation_check = 1;
462 if ( exists $args{alias} && !exists $args{'-alias'} ) {
463 $args{'-alias'} = delete $args{alias};
464 $deprecation_check = 1;
467 if ( $deprecation_check ) {
468 Moose::Deprecated::deprecated(
469 feature => 'alias or excludes',
471 'The alias and excludes options for role application'.
472 ' have been renamed -alias and -excludes'.
473 " (${\$other->name} is consuming ${\$self->name}".
474 " - do you need to upgrade ${\$other->name}?)"
478 if ( exists $args{'-excludes'} ) {
479 # I wish we had coercion here :)
480 $args{'-excludes'} = (
481 ref $args{'-excludes'} eq 'ARRAY'
483 : [ $args{'-excludes'} ]
487 return $application_class->new(%args)->apply($self, $other, \%args);
490 sub composition_class_roles { }
493 my ($class, @role_specs) = @_;
495 require Moose::Meta::Role::Composite;
497 my (@roles, %role_params);
498 while (@role_specs) {
499 my ($role, $params) = @{ splice @role_specs, 0, 1 };
503 : Class::MOP::class_of($role);
505 my $actual_role = $requested_role->_role_for_combination($params);
506 push @roles => $actual_role;
508 next unless defined $params;
509 $role_params{$actual_role->name} = $params;
512 my $c = Moose::Meta::Role::Composite->new(roles => \@roles);
513 return $c->apply_params(\%role_params);
516 sub _role_for_combination {
517 my ($self, $params) = @_;
522 my ( $role, $package_name, %options ) = @_;
524 $options{package} = $package_name;
526 (ref $options{attributes} eq 'HASH')
527 || confess "You must pass a HASH ref of attributes"
528 if exists $options{attributes};
530 (ref $options{methods} eq 'HASH')
531 || confess "You must pass a HASH ref of methods"
532 if exists $options{methods};
534 $options{meta_name} = 'meta'
535 unless exists $options{meta_name};
537 my (%initialize_options) = %options;
538 delete @initialize_options{qw(
547 my $meta = $role->initialize( $package_name => %initialize_options );
549 $meta->_instantiate_module( $options{version}, $options{authority} );
551 $meta->_add_meta_method($options{meta_name})
552 if defined $options{meta_name};
554 if (exists $options{attributes}) {
555 foreach my $attribute_name (keys %{$options{attributes}}) {
556 my $attr = $options{attributes}->{$attribute_name};
557 $meta->add_attribute(
558 $attribute_name => blessed $attr ? $attr : %{$attr} );
562 if (exists $options{methods}) {
563 foreach my $method_name (keys %{$options{methods}}) {
564 $meta->add_method($method_name, $options{methods}->{$method_name});
574 for my $meta (Class::MOP::get_all_metaclass_instances) {
575 next if $meta->name eq $self->name;
576 next unless $meta->isa('Moose::Meta::Class')
577 || $meta->isa('Moose::Meta::Role');
578 push @consumers, $meta->name
579 if $meta->does_role($self->name);
584 # anonymous roles. most of it is copied straight out of Class::MOP::Class.
585 # an intrepid hacker might find great riches if he unifies this code with that
586 # code in Class::MOP::Module or Class::MOP::Package
589 # this should be sufficient, if you have a
590 # use case where it is not, write a test and
592 my $ANON_ROLE_SERIAL = 0;
595 # we need a sufficiently annoying prefix
596 # this should suffice for now, this is
597 # used in a couple of places below, so
598 # need to put it up here for now.
599 my $ANON_ROLE_PREFIX = 'Moose::Meta::Role::__ANON__::SERIAL::';
603 no warnings 'uninitialized';
604 $self->name =~ /^$ANON_ROLE_PREFIX/;
607 sub create_anon_role {
608 my ($role, %options) = @_;
609 $options{weaken} = 1 unless exists $options{weaken};
610 my $package_name = $ANON_ROLE_PREFIX . ++$ANON_ROLE_SERIAL;
611 return $role->create($package_name, %options);
615 # this will only get called for
616 # anon-roles, all other calls
617 # are assumed to occur during
618 # global destruction and so don't
619 # really need to be handled explicitly
623 return if in_global_destruction(); # it'll happen soon anyway and this just makes things more complicated
625 no warnings 'uninitialized';
626 return unless $self->name =~ /^$ANON_ROLE_PREFIX/;
628 # Moose does a weird thing where it replaces the metaclass for
629 # class when fixing metaclass incompatibility. In that case,
630 # we don't want to clean out the namespace now. We can detect
631 # that because Moose will explicitly update the singleton
632 # cache in Class::MOP.
633 my $current_meta = Class::MOP::get_metaclass_by_name($self->name);
634 return if $current_meta ne $self;
636 my ($serial_id) = ($self->name =~ /^$ANON_ROLE_PREFIX(\d+)/);
638 foreach my $key (keys %{$ANON_ROLE_PREFIX . $serial_id}) {
639 delete ${$ANON_ROLE_PREFIX . $serial_id}{$key};
641 delete ${'main::' . $ANON_ROLE_PREFIX}{$serial_id . '::'};
645 #####################################################################
647 ## This is Moose::Meta::Role as defined by Moose (plus the use of
648 ## MooseX::AttributeHelpers module). It is here as a reference to
649 ## make it easier to see what is happening above with all the meta
651 #####################################################################
654 # metaclass => 'Array',
655 # reader => 'get_roles',
656 # isa => 'ArrayRef[Moose::Meta::Role]',
657 # default => sub { [] },
659 # 'push' => 'add_role',
663 # has 'excluded_roles_map' => (
664 # metaclass => 'Hash',
665 # reader => 'get_excluded_roles_map',
666 # isa => 'HashRef[Str]',
668 # # Not exactly set, cause it sets multiple
669 # 'set' => 'add_excluded_roles',
670 # 'keys' => 'get_excluded_roles_list',
671 # 'exists' => 'excludes_role',
675 # has 'required_methods' => (
676 # metaclass => 'Hash',
677 # reader => 'get_required_methods_map',
678 # isa => 'HashRef[Moose::Meta::Role::Method::Required]',
680 # # not exactly set, or delete since it works for multiple
681 # 'set' => 'add_required_methods',
682 # 'delete' => 'remove_required_methods',
683 # 'keys' => 'get_required_method_list',
684 # 'exists' => 'requires_method',
688 # # the before, around and after modifiers are
689 # # HASH keyed by method-name, with ARRAY of
690 # # CODE refs to apply in that order
692 # has 'before_method_modifiers' => (
693 # metaclass => 'Hash',
694 # reader => 'get_before_method_modifiers_map',
695 # isa => 'HashRef[ArrayRef[CodeRef]]',
697 # 'keys' => 'get_before_method_modifiers',
698 # 'exists' => 'has_before_method_modifiers',
699 # # This actually makes sure there is an
700 # # ARRAY at the given key, and pushed onto
701 # # it. It also checks for duplicates as well
702 # # 'add' => 'add_before_method_modifier'
706 # has 'after_method_modifiers' => (
707 # metaclass => 'Hash',
708 # reader =>'get_after_method_modifiers_map',
709 # isa => 'HashRef[ArrayRef[CodeRef]]',
711 # 'keys' => 'get_after_method_modifiers',
712 # 'exists' => 'has_after_method_modifiers',
713 # # This actually makes sure there is an
714 # # ARRAY at the given key, and pushed onto
715 # # it. It also checks for duplicates as well
716 # # 'add' => 'add_after_method_modifier'
720 # has 'around_method_modifiers' => (
721 # metaclass => 'Hash',
722 # reader =>'get_around_method_modifiers_map',
723 # isa => 'HashRef[ArrayRef[CodeRef]]',
725 # 'keys' => 'get_around_method_modifiers',
726 # 'exists' => 'has_around_method_modifiers',
727 # # This actually makes sure there is an
728 # # ARRAY at the given key, and pushed onto
729 # # it. It also checks for duplicates as well
730 # # 'add' => 'add_around_method_modifier'
734 # # override is similar to the other modifiers
735 # # except that it is not an ARRAY of code refs
736 # # but instead just a single name->code mapping
738 # has 'override_method_modifiers' => (
739 # metaclass => 'Hash',
740 # reader =>'get_override_method_modifiers_map',
741 # isa => 'HashRef[CodeRef]',
743 # 'keys' => 'get_override_method_modifier',
744 # 'exists' => 'has_override_method_modifier',
745 # 'add' => 'add_override_method_modifier', # checks for local method ..
749 #####################################################################
760 Moose::Meta::Role - The Moose Role metaclass
764 This class is a subclass of L<Class::MOP::Module> that provides
765 additional Moose-specific functionality.
767 It's API looks a lot like L<Moose::Meta::Class>, but internally it
768 implements many things differently. This may change in the future.
772 C<Moose::Meta::Role> is a subclass of L<Class::MOP::Module>.
780 =item B<< Moose::Meta::Role->initialize($role_name) >>
782 This method creates a new role object with the provided name.
784 =item B<< Moose::Meta::Role->combine( [ $role => { ... } ], [ $role ], ... ) >>
786 This method accepts a list of array references. Each array reference
787 should contain a role name or L<Moose::Meta::Role> object as its first element. The second element is
788 an optional hash reference. The hash reference can contain C<-excludes>
789 and C<-alias> keys to control how methods are composed from the role.
791 The return value is a new L<Moose::Meta::Role::Composite> that
792 represents the combined roles.
794 =item B<< $metarole->composition_class_roles >>
796 When combining multiple roles using C<combine>, this method is used to obtain a
797 list of role names to be applied to the L<Moose::Meta::Role::Composite>
798 instance returned by C<combine>. The default implementation returns an empty
799 list. Extensions that need to hook into role combination may wrap this method
800 to return additional role names.
802 =item B<< Moose::Meta::Role->create($name, %options) >>
804 This method is identical to the L<Moose::Meta::Class> C<create>
807 =item B<< Moose::Meta::Role->create_anon_role >>
809 This method is identical to the L<Moose::Meta::Class>
810 C<create_anon_class> method.
812 =item B<< $metarole->is_anon_role >>
814 Returns true if the role is an anonymous role.
816 =item B<< $metarole->consumers >>
818 Returns a list of names of classes and roles which consume this role.
822 =head2 Role application
826 =item B<< $metarole->apply( $thing, @options ) >>
828 This method applies a role to the given C<$thing>. That can be another
829 L<Moose::Meta::Role>, object, a L<Moose::Meta::Class> object, or a
830 (non-meta) object instance.
832 The options are passed directly to the constructor for the appropriate
833 L<Moose::Meta::Role::Application> subclass.
835 Note that this will apply the role even if the C<$thing> in question already
836 C<does> this role. L<Moose::Util/does_role> is a convenient wrapper for
837 finding out if role application is necessary.
841 =head2 Roles and other roles
845 =item B<< $metarole->get_roles >>
847 This returns an array reference of roles which this role does. This
848 list may include duplicates.
850 =item B<< $metarole->calculate_all_roles >>
852 This returns a I<unique> list of all roles that this role does, and
853 all the roles that its roles do.
855 =item B<< $metarole->does_role($role) >>
857 Given a role I<name> or L<Moose::Meta::Role> object, returns true if this role
860 =item B<< $metarole->add_role($role) >>
862 Given a L<Moose::Meta::Role> object, this adds the role to the list of
863 roles that the role does.
865 =item B<< $metarole->get_excluded_roles_list >>
867 Returns a list of role names which this role excludes.
869 =item B<< $metarole->excludes_role($role_name) >>
871 Given a role I<name>, returns true if this role excludes the named
874 =item B<< $metarole->add_excluded_roles(@role_names) >>
876 Given one or more role names, adds those roles to the list of excluded
883 The methods for dealing with a role's methods are all identical in API
884 and behavior to the same methods in L<Class::MOP::Class>.
888 =item B<< $metarole->method_metaclass >>
890 Returns the method metaclass name for the role. This defaults to
891 L<Moose::Meta::Role::Method>.
893 =item B<< $metarole->get_method($name) >>
895 =item B<< $metarole->has_method($name) >>
897 =item B<< $metarole->add_method( $name, $body ) >>
899 =item B<< $metarole->get_method_list >>
901 =item B<< $metarole->find_method_by_name($name) >>
903 These methods are all identical to the methods of the same name in
904 L<Class::MOP::Package>
910 As with methods, the methods for dealing with a role's attribute are
911 all identical in API and behavior to the same methods in
912 L<Class::MOP::Class>.
914 However, attributes stored in this class are I<not> stored as
915 objects. Rather, the attribute definition is stored as a hash
916 reference. When a role is composed into a class, this hash reference
917 is passed directly to the metaclass's C<add_attribute> method.
919 This is quite likely to change in the future.
923 =item B<< $metarole->get_attribute($attribute_name) >>
925 =item B<< $metarole->has_attribute($attribute_name) >>
927 =item B<< $metarole->get_attribute_list >>
929 =item B<< $metarole->add_attribute($name, %options) >>
931 =item B<< $metarole->remove_attribute($attribute_name) >>
935 =head2 Required methods
939 =item B<< $metarole->get_required_method_list >>
941 Returns the list of methods required by the role.
943 =item B<< $metarole->requires_method($name) >>
945 Returns true if the role requires the named method.
947 =item B<< $metarole->add_required_methods(@names) >>
949 Adds the named methods to the role's list of required methods.
951 =item B<< $metarole->remove_required_methods(@names) >>
953 Removes the named methods from the role's list of required methods.
955 =item B<< $metarole->add_conflicting_method(%params) >>
957 Instantiate the parameters as a L<Moose::Meta::Role::Method::Conflicting>
958 object, then add it to the required method list.
962 =head2 Method modifiers
964 These methods act like their counterparts in L<Class::MOP::Class> and
965 L<Moose::Meta::Class>.
967 However, method modifiers are simply stored internally, and are not
968 applied until the role itself is applied to a class.
972 =item B<< $metarole->add_after_method_modifier($method_name, $method) >>
974 =item B<< $metarole->add_around_method_modifier($method_name, $method) >>
976 =item B<< $metarole->add_before_method_modifier($method_name, $method) >>
978 =item B<< $metarole->add_override_method_modifier($method_name, $method) >>
980 These methods all add an appropriate modifier to the internal list of
983 =item B<< $metarole->has_after_method_modifiers >>
985 =item B<< $metarole->has_around_method_modifiers >>
987 =item B<< $metarole->has_before_method_modifiers >>
989 =item B<< $metarole->has_override_method_modifier >>
991 Return true if the role has any modifiers of the given type.
993 =item B<< $metarole->get_after_method_modifiers($method_name) >>
995 =item B<< $metarole->get_around_method_modifiers($method_name) >>
997 =item B<< $metarole->get_before_method_modifiers($method_name) >>
999 Given a method name, returns a list of the appropriate modifiers for
1002 =item B<< $metarole->get_override_method_modifier($method_name) >>
1004 Given a method name, returns the override method modifier for that
1005 method, if it has one.
1009 =head2 Introspection
1013 =item B<< Moose::Meta::Role->meta >>
1015 This will return a L<Class::MOP::Class> instance for this class.
1021 See L<Moose/BUGS> for details on reporting bugs.
1025 Stevan Little E<lt>stevan@iinteractive.comE<gt>
1027 =head1 COPYRIGHT AND LICENSE
1029 Copyright 2006-2010 by Infinity Interactive, Inc.
1031 L<http://www.iinteractive.com>
1033 This library is free software; you can redistribute it and/or modify
1034 it under the same terms as Perl itself.