2 package Moose::Meta::Role;
8 use Scalar::Util 'blessed';
10 use Sub::Name 'subname';
11 use Devel::GlobalDestruction 'in_global_destruction';
13 our $VERSION = '0.89_02';
14 $VERSION = eval $VERSION;
15 our $AUTHORITY = 'cpan:STEVAN';
17 use Moose::Meta::Class;
18 use Moose::Meta::Role::Method;
19 use Moose::Meta::Role::Method::Required;
20 use Moose::Meta::Role::Method::Conflicting;
22 use base 'Class::MOP::Module';
24 ## ------------------------------------------------------------------
26 ## I normally don't do this, but I am doing
27 ## a whole bunch of meta-programmin in this
28 ## module, so it just makes sense. For a clearer
29 ## picture of what is going on in the next
30 ## several lines of code, look at the really
31 ## big comment at the end of this file (right
34 ## ------------------------------------------------------------------
36 my $META = __PACKAGE__->meta;
38 ## ------------------------------------------------------------------
42 # since roles are lazy, we hold all the attributes
43 # of the individual role in 'statis' until which
44 # time when it is applied to a class. This means
45 # keeping a lot of things in hash maps, so we are
46 # using a little of that meta-programmin' magic
47 # here an saving lots of extra typin. And since
48 # many of these attributes above require similar
49 # functionality to support them, so we again use
50 # the wonders of meta-programmin' to deliver a
51 # very compact solution to this normally verbose
57 name => 'excluded_roles_map',
58 attr_reader => 'get_excluded_roles_map' ,
60 add => 'add_excluded_roles',
61 get_keys => 'get_excluded_roles_list',
62 existence => 'excludes_role',
66 name => 'required_methods',
67 attr_reader => 'get_required_methods_map',
69 remove => 'remove_required_methods',
70 get_values => 'get_required_method_list',
71 existence => 'requires_method',
75 name => 'attribute_map',
76 attr_reader => 'get_attribute_map',
78 get => 'get_attribute',
79 get_keys => 'get_attribute_list',
80 existence => 'has_attribute',
81 remove => 'remove_attribute',
86 my $attr_reader = $action->{attr_reader};
87 my $methods = $action->{methods};
89 # create the attribute
90 $META->add_attribute($action->{name} => (
91 reader => $attr_reader,
95 # create some helper methods
96 $META->add_method($methods->{add} => sub {
97 my ($self, @values) = @_;
98 $self->$attr_reader->{$_} = undef foreach @values;
99 }) if exists $methods->{add};
101 $META->add_method($methods->{get_keys} => sub {
103 keys %{$self->$attr_reader};
104 }) if exists $methods->{get_keys};
106 $META->add_method($methods->{get_values} => sub {
108 values %{$self->$attr_reader};
109 }) if exists $methods->{get_values};
111 $META->add_method($methods->{get} => sub {
112 my ($self, $name) = @_;
113 $self->$attr_reader->{$name}
114 }) if exists $methods->{get};
116 $META->add_method($methods->{existence} => sub {
117 my ($self, $name) = @_;
118 exists $self->$attr_reader->{$name} ? 1 : 0;
119 }) if exists $methods->{existence};
121 $META->add_method($methods->{remove} => sub {
122 my ($self, @values) = @_;
123 delete $self->$attr_reader->{$_} foreach @values;
124 }) if exists $methods->{remove};
127 $META->add_attribute(
129 reader => 'method_metaclass',
130 default => 'Moose::Meta::Role::Method',
133 $META->add_attribute(
134 'required_method_metaclass',
135 reader => 'required_method_metaclass',
136 default => 'Moose::Meta::Role::Method::Required',
139 $META->add_attribute(
140 'conflicting_method_metaclass',
141 reader => 'conflicting_method_metaclass',
142 default => 'Moose::Meta::Role::Method::Conflicting',
145 $META->add_attribute(
146 'application_to_class_class',
147 reader => 'application_to_class_class',
148 default => 'Moose::Meta::Role::Application::ToClass',
151 $META->add_attribute(
152 'application_to_role_class',
153 reader => 'application_to_role_class',
154 default => 'Moose::Meta::Role::Application::ToRole',
157 $META->add_attribute(
158 'application_to_instance_class',
159 reader => 'application_to_instance_class',
160 default => 'Moose::Meta::Role::Application::ToInstance',
163 $META->add_attribute(
164 'composition_class_roles',
165 reader => 'composition_class_roles',
166 predicate => 'has_composition_class_roles',
169 ## some things don't always fit, so they go here ...
174 unless ( defined $name ) {
176 Moose->throw_error("You must provide a name for the attribute");
179 if (scalar @_ == 1 && ref($_[0]) eq 'HASH') {
185 $self->get_attribute_map->{$name} = $attr_desc;
188 sub add_required_methods {
193 if (!blessed($method)) {
194 $method = $self->required_method_metaclass->new(
198 $self->get_required_methods_map->{$method->name} = $method;
202 sub add_conflicting_method {
206 if (@_ == 1 && blessed($_[0])) {
210 $method = $self->conflicting_method_metaclass->new(@_);
213 $self->add_required_methods($method);
216 ## ------------------------------------------------------------------
220 # the before/around/after method modifiers are
221 # stored by name, but there can be many methods
222 # then associated with that name. So again we have
223 # lots of similar functionality, so we can do some
224 # meta-programmin' and save some time.
227 foreach my $modifier_type (qw[ before around after ]) {
229 my $attr_reader = "get_${modifier_type}_method_modifiers_map";
231 # create the attribute ...
232 $META->add_attribute("${modifier_type}_method_modifiers" => (
233 reader => $attr_reader,
234 default => sub { {} }
237 # and some helper methods ...
238 $META->add_method("get_${modifier_type}_method_modifiers" => sub {
239 my ($self, $method_name) = @_;
240 #return () unless exists $self->$attr_reader->{$method_name};
241 my $mm = $self->$attr_reader->{$method_name};
245 $META->add_method("has_${modifier_type}_method_modifiers" => sub {
246 my ($self, $method_name) = @_;
248 # for now we assume that if it exists,..
249 # it has at least one modifier in it
250 (exists $self->$attr_reader->{$method_name}) ? 1 : 0;
253 $META->add_method("add_${modifier_type}_method_modifier" => sub {
254 my ($self, $method_name, $method) = @_;
256 $self->$attr_reader->{$method_name} = []
257 unless exists $self->$attr_reader->{$method_name};
259 my $modifiers = $self->$attr_reader->{$method_name};
262 # check to see that we aren't adding the
263 # same code twice. We err in favor of the
264 # first on here, this may not be as expected
265 foreach my $modifier (@{$modifiers}) {
266 return if $modifier == $method;
269 push @{$modifiers} => $method;
274 ## ------------------------------------------------------------------
275 ## override method mofidiers
277 $META->add_attribute('override_method_modifiers' => (
278 reader => 'get_override_method_modifiers_map',
279 default => sub { {} }
283 # these are a little different because there
284 # can only be one per name, whereas the other
285 # method modifiers can have multiples.
288 sub add_override_method_modifier {
289 my ($self, $method_name, $method) = @_;
290 (!$self->has_method($method_name))
291 || Moose->throw_error("Cannot add an override of method '$method_name' " .
292 "because there is a local version of '$method_name'");
293 $self->get_override_method_modifiers_map->{$method_name} = $method;
296 sub has_override_method_modifier {
297 my ($self, $method_name) = @_;
299 # for now we assume that if it exists,..
300 # it has at least one modifier in it
301 (exists $self->get_override_method_modifiers_map->{$method_name}) ? 1 : 0;
304 sub get_override_method_modifier {
305 my ($self, $method_name) = @_;
306 $self->get_override_method_modifiers_map->{$method_name};
309 ## general list accessor ...
311 sub get_method_modifier_list {
312 my ($self, $modifier_type) = @_;
313 my $accessor = "get_${modifier_type}_method_modifiers_map";
314 keys %{$self->$accessor};
317 sub reset_package_cache_flag { (shift)->{'_package_cache_flag'} = undef }
318 sub update_package_cache_flag {
320 $self->{'_package_cache_flag'} = Class::MOP::check_package_cache_flag($self->name);
325 ## ------------------------------------------------------------------
328 $META->add_attribute('roles' => (
329 reader => 'get_roles',
330 default => sub { [] }
334 my ($self, $role) = @_;
335 (blessed($role) && $role->isa('Moose::Meta::Role'))
336 || Moose->throw_error("Roles must be instances of Moose::Meta::Role");
337 push @{$self->get_roles} => $role;
338 $self->reset_package_cache_flag;
341 sub calculate_all_roles {
347 $_->calculate_all_roles
348 } @{ $self->get_roles });
352 my ($self, $role_name) = @_;
354 || Moose->throw_error("You must supply a role name to look for");
355 # if we are it,.. then return true
356 return 1 if $role_name eq $self->name;
357 # otherwise.. check our children
358 foreach my $role (@{$self->get_roles}) {
359 return 1 if $role->does_role($role_name);
364 ## ------------------------------------------------------------------
370 my $current = Class::MOP::check_package_cache_flag($self->name);
372 if (defined $self->{'_package_cache_flag'} && $self->{'_package_cache_flag'} == $current) {
373 return $self->{'methods'} ||= {};
376 $self->{_package_cache_flag} = $current;
378 my $map = $self->{'methods'} ||= {};
380 my $role_name = $self->name;
381 my $method_metaclass = $self->method_metaclass;
383 my $all_code = $self->get_all_package_symbols('CODE');
385 foreach my $symbol (keys %{ $all_code }) {
386 my $code = $all_code->{$symbol};
388 next if exists $map->{$symbol} &&
389 defined $map->{$symbol} &&
390 $map->{$symbol}->body == $code;
392 my ($pkg, $name) = Class::MOP::get_code_info($code);
393 my $meta = Class::MOP::class_of($pkg);
395 if ($meta && $meta->isa('Moose::Meta::Role')) {
396 my $role = $meta->name;
397 next unless $self->does_role($role);
401 # in 5.10 constant.pm the constants show up
402 # as being in the right package, but in pre-5.10
403 # they show up as constant::__ANON__ so we
404 # make an exception here to be sure that things
405 # work as expected in both.
407 unless ($pkg eq 'constant' && $name eq '__ANON__') {
408 next if ($pkg || '') ne $role_name ||
409 (($name || '') ne '__ANON__' && ($pkg || '') ne $role_name);
413 $map->{$symbol} = $method_metaclass->wrap(
415 package_name => $role_name,
424 my ($self, $name) = @_;
425 $self->get_method_map->{$name};
429 my ($self, $name) = @_;
430 exists $self->get_method_map->{$name} ? 1 : 0
433 # FIXME this is copy-pasted from Class::MOP::Class
434 # refactor to inherit from some common base
435 sub wrap_method_body {
436 my ( $self, %args ) = @_;
438 ('CODE' eq ref $args{body})
439 || Moose->throw_error("Your code block must be a CODE reference");
441 $self->method_metaclass->wrap(
442 package_name => $self->name,
448 my ($self, $method_name, $method) = @_;
449 (defined $method_name && $method_name)
450 || Moose->throw_error("You must define a method name");
453 if (blessed($method)) {
454 $body = $method->body;
455 if ($method->package_name ne $self->name) {
456 $method = $method->clone(
457 package_name => $self->name,
459 ) if $method->can('clone');
464 $method = $self->wrap_method_body( body => $body, name => $method_name );
467 $method->attach_to_class($self);
469 $self->get_method_map->{$method_name} = $method;
471 my $full_method_name = ($self->name . '::' . $method_name);
472 $self->add_package_symbol(
473 { sigil => '&', type => 'CODE', name => $method_name },
474 subname($full_method_name => $body)
477 $self->update_package_cache_flag; # still valid, since we just added the method to the map, and if it was invalid before that then get_method_map updated it
480 sub find_method_by_name { (shift)->get_method(@_) }
482 sub get_method_list {
484 grep { !/^meta$/ } keys %{$self->get_method_map};
488 Carp::cluck("The alias_method method is deprecated. Use add_method instead.\n");
492 $self->add_method(@_);
495 ## ------------------------------------------------------------------
497 ## ------------------------------------------------------------------
500 my ($self, $other, @args) = @_;
503 || Moose->throw_error("You must pass in an blessed instance");
505 my $application_class;
506 if ($other->isa('Moose::Meta::Role')) {
507 $application_class = $self->application_to_role_class;
509 elsif ($other->isa('Moose::Meta::Class')) {
510 $application_class = $self->application_to_class_class;
513 $application_class = $self->application_to_instance_class;
516 Class::MOP::load_class($application_class);
517 return $application_class->new(@args)->apply($self, $other);
521 my ($class, @role_specs) = @_;
523 require Moose::Meta::Role::Composite;
525 my (@roles, %role_params);
526 while (@role_specs) {
527 my ($role_name, $params) = @{ splice @role_specs, 0, 1 };
528 my $requested_role = Class::MOP::class_of($role_name);
530 my $actual_role = $requested_role->_role_for_combination($params);
531 push @roles => $actual_role;
533 next unless defined $params;
534 $role_params{$actual_role->name} = $params;
537 my $c = Moose::Meta::Role::Composite->new(roles => \@roles);
538 return $c->apply_params(\%role_params);
541 sub _role_for_combination {
542 my ($self, $params) = @_;
547 my ( $role, $package_name, %options ) = @_;
549 $options{package} = $package_name;
551 (ref $options{attributes} eq 'HASH')
552 || confess "You must pass a HASH ref of attributes"
553 if exists $options{attributes};
555 (ref $options{methods} eq 'HASH')
556 || confess "You must pass a HASH ref of methods"
557 if exists $options{methods};
559 my (%initialize_options) = %options;
560 delete @initialize_options{qw(
568 my $meta = $role->initialize( $package_name => %initialize_options );
570 $meta->_instantiate_module( $options{version}, $options{authority} );
573 $meta->add_method('meta' => sub {
574 $role->initialize(ref($_[0]) || $_[0]);
577 if (exists $options{attributes}) {
578 foreach my $attribute_name (keys %{$options{attributes}}) {
579 my $attr = $options{attributes}->{$attribute_name};
580 $meta->add_attribute($attribute_name => $attr);
584 if (exists $options{methods}) {
585 foreach my $method_name (keys %{$options{methods}}) {
586 $meta->add_method($method_name, $options{methods}->{$method_name});
590 Class::MOP::weaken_metaclass($meta->name)
591 if $meta->is_anon_role;
596 # anonymous roles. most of it is copied straight out of Class::MOP::Class.
597 # an intrepid hacker might find great riches if he unifies this code with that
598 # code in Class::MOP::Module or Class::MOP::Package
601 # this should be sufficient, if you have a
602 # use case where it is not, write a test and
604 my $ANON_ROLE_SERIAL = 0;
607 # we need a sufficiently annoying prefix
608 # this should suffice for now, this is
609 # used in a couple of places below, so
610 # need to put it up here for now.
611 my $ANON_ROLE_PREFIX = 'Moose::Meta::Role::__ANON__::SERIAL::';
615 no warnings 'uninitialized';
616 $self->name =~ /^$ANON_ROLE_PREFIX/;
619 sub create_anon_role {
620 my ($role, %options) = @_;
621 my $package_name = $ANON_ROLE_PREFIX . ++$ANON_ROLE_SERIAL;
622 return $role->create($package_name, %options);
626 # this will only get called for
627 # anon-roles, all other calls
628 # are assumed to occur during
629 # global destruction and so don't
630 # really need to be handled explicitly
634 return if in_global_destruction(); # it'll happen soon anyway and this just makes things more complicated
636 no warnings 'uninitialized';
637 return unless $self->name =~ /^$ANON_ROLE_PREFIX/;
639 # XXX: is this necessary for us? I don't understand what it's doing
642 # Moose does a weird thing where it replaces the metaclass for
643 # class when fixing metaclass incompatibility. In that case,
644 # we don't want to clean out the namespace now. We can detect
645 # that because Moose will explicitly update the singleton
646 # cache in Class::MOP.
647 #my $current_meta = Class::MOP::get_metaclass_by_name($self->name);
648 #return if $current_meta ne $self;
650 my ($serial_id) = ($self->name =~ /^$ANON_ROLE_PREFIX(\d+)/);
652 foreach my $key (keys %{$ANON_ROLE_PREFIX . $serial_id}) {
653 delete ${$ANON_ROLE_PREFIX . $serial_id}{$key};
655 delete ${'main::' . $ANON_ROLE_PREFIX}{$serial_id . '::'};
659 #####################################################################
661 ## This is Moose::Meta::Role as defined by Moose (plus the use of
662 ## MooseX::AttributeHelpers module). It is here as a reference to
663 ## make it easier to see what is happening above with all the meta
665 #####################################################################
668 # metaclass => 'Array',
669 # reader => 'get_roles',
670 # isa => 'ArrayRef[Moose::Meta::Role]',
671 # default => sub { [] },
673 # 'push' => 'add_role',
677 # has 'excluded_roles_map' => (
678 # metaclass => 'Hash',
679 # reader => 'get_excluded_roles_map',
680 # isa => 'HashRef[Str]',
682 # # Not exactly set, cause it sets multiple
683 # 'set' => 'add_excluded_roles',
684 # 'keys' => 'get_excluded_roles_list',
685 # 'exists' => 'excludes_role',
689 # has 'attribute_map' => (
690 # metaclass => 'Hash',
691 # reader => 'get_attribute_map',
692 # isa => 'HashRef[Str]',
694 # # 'set' => 'add_attribute' # has some special crap in it
695 # 'get' => 'get_attribute',
696 # 'keys' => 'get_attribute_list',
697 # 'exists' => 'has_attribute',
698 # # Not exactly delete, cause it sets multiple
699 # 'delete' => 'remove_attribute',
703 # has 'required_methods' => (
704 # metaclass => 'Hash',
705 # reader => 'get_required_methods_map',
706 # isa => 'HashRef[Moose::Meta::Role::Method::Required]',
708 # # not exactly set, or delete since it works for multiple
709 # 'set' => 'add_required_methods',
710 # 'delete' => 'remove_required_methods',
711 # 'keys' => 'get_required_method_list',
712 # 'exists' => 'requires_method',
716 # # the before, around and after modifiers are
717 # # HASH keyed by method-name, with ARRAY of
718 # # CODE refs to apply in that order
720 # has 'before_method_modifiers' => (
721 # metaclass => 'Hash',
722 # reader => 'get_before_method_modifiers_map',
723 # isa => 'HashRef[ArrayRef[CodeRef]]',
725 # 'keys' => 'get_before_method_modifiers',
726 # 'exists' => 'has_before_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_before_method_modifier'
734 # has 'after_method_modifiers' => (
735 # metaclass => 'Hash',
736 # reader =>'get_after_method_modifiers_map',
737 # isa => 'HashRef[ArrayRef[CodeRef]]',
739 # 'keys' => 'get_after_method_modifiers',
740 # 'exists' => 'has_after_method_modifiers',
741 # # This actually makes sure there is an
742 # # ARRAY at the given key, and pushed onto
743 # # it. It also checks for duplicates as well
744 # # 'add' => 'add_after_method_modifier'
748 # has 'around_method_modifiers' => (
749 # metaclass => 'Hash',
750 # reader =>'get_around_method_modifiers_map',
751 # isa => 'HashRef[ArrayRef[CodeRef]]',
753 # 'keys' => 'get_around_method_modifiers',
754 # 'exists' => 'has_around_method_modifiers',
755 # # This actually makes sure there is an
756 # # ARRAY at the given key, and pushed onto
757 # # it. It also checks for duplicates as well
758 # # 'add' => 'add_around_method_modifier'
762 # # override is similar to the other modifiers
763 # # except that it is not an ARRAY of code refs
764 # # but instead just a single name->code mapping
766 # has 'override_method_modifiers' => (
767 # metaclass => 'Hash',
768 # reader =>'get_override_method_modifiers_map',
769 # isa => 'HashRef[CodeRef]',
771 # 'keys' => 'get_override_method_modifier',
772 # 'exists' => 'has_override_method_modifier',
773 # 'add' => 'add_override_method_modifier', # checks for local method ..
777 #####################################################################
788 Moose::Meta::Role - The Moose Role metaclass
792 This class is a subclass of L<Class::MOP::Module> that provides
793 additional Moose-specific functionality.
795 It's API looks a lot like L<Moose::Meta::Class>, but internally it
796 implements many things differently. This may change in the future.
800 C<Moose::Meta::Role> is a subclass of L<Class::MOP::Module>.
808 =item B<< Moose::Meta::Role->initialize($role_name) >>
810 This method creates a new role object with the provided name.
812 =item B<< Moose::Meta::Role->combine( [ $role => { ... } ], [ $role ], ... ) >>
814 This method accepts a list of array references. Each array reference
815 should contain a role name as its first element. The second element is
816 an optional hash reference. The hash reference can contain C<-excludes>
817 and C<-alias> keys to control how methods are composed from the role.
819 The return value is a new L<Moose::Meta::Role::Composite> that
820 represents the combined roles.
822 =item B<< Moose::Meta::Role->create($name, %options) >>
824 This method is identical to the L<Moose::Meta::Class> C<create>
827 =item B<< Moose::Meta::Role->create_anon_role >>
829 This method is identical to the L<Moose::Meta::Class>
830 C<create_anon_class> method.
832 =item B<< $metarole->is_anon_role >>
834 Returns true if the role is an anonymous role.
838 =head2 Role application
842 =item B<< $metarole->apply( $thing, @options ) >>
844 This method applies a role to the given C<$thing>. That can be another
845 L<Moose::Meta::Role>, object, a L<Moose::Meta::Class> object, or a
846 (non-meta) object instance.
848 The options are passed directly to the constructor for the appropriate
849 L<Moose::Meta::Role::Application> subclass.
851 Note that this will apply the role even if the C<$thing> in question already
852 C<does> this role. L<Moose::Util/does_role> is a convenient wrapper for
853 finding out if role application is necessary.
857 =head2 Roles and other roles
861 =item B<< $metarole->get_roles >>
863 This returns an array reference of roles which this role does. This
864 list may include duplicates.
866 =item B<< $metarole->calculate_all_roles >>
868 This returns a I<unique> list of all roles that this role does, and
869 all the roles that its roles do.
871 =item B<< $metarole->does_role($role_name) >>
873 Given a role I<name>, returns true if this role does the given
876 =item B<< $metarole->add_role($role) >>
878 Given a L<Moose::Meta::Role> object, this adds the role to the list of
879 roles that the role does.
881 =item B<< $metarole->get_excluded_roles_list >>
883 Returns a list of role names which this role excludes.
885 =item B<< $metarole->excludes_role($role_name) >>
887 Given a role I<name>, returns true if this role excludes the named
890 =item B<< $metarole->add_excluded_roles(@role_names) >>
892 Given one or more role names, adds those roles to the list of excluded
899 The methods for dealing with a role's methods are all identical in API
900 and behavior to the same methods in L<Class::MOP::Class>.
904 =item B<< $metarole->method_metaclass >>
906 Returns the method metaclass name for the role. This defaults to
907 L<Moose::Meta::Role::Method>.
909 =item B<< $metarole->get_method($name) >>
911 =item B<< $metarole->has_method($name) >>
913 =item B<< $metarole->add_method( $name, $body ) >>
915 =item B<< $metarole->get_method_list >>
917 =item B<< $metarole->get_method_map >>
919 =item B<< $metarole->find_method_by_name($name) >>
921 These methods are all identical to the methods of the same name in
928 As with methods, the methods for dealing with a role's attribute are
929 all identical in API and behavior to the same methods in
930 L<Class::MOP::Class>.
932 However, attributes stored in this class are I<not> stored as
933 objects. Rather, the attribute definition is stored as a hash
934 reference. When a role is composed into a class, this hash reference
935 is passed directly to the metaclass's C<add_attribute> method.
937 This is quite likely to change in the future.
941 =item B<< $metarole->get_attribute($attribute_name) >>
943 =item B<< $metarole->has_attribute($attribute_name) >>
945 =item B<< $metarole->get_attribute_map >>
947 =item B<< $metarole->get_attribute_list >>
949 =item B<< $metarole->add_attribute($name, %options) >>
951 =item B<< $metarole->remove_attribute($attribute_name) >>
955 =head2 Required methods
959 =item B<< $metarole->get_required_method_list >>
961 Returns the list of methods required by the role.
963 =item B<< $metarole->requires_method($name) >>
965 Returns true if the role requires the named method.
967 =item B<< $metarole->add_required_methods(@names) >>
969 Adds the named methods to the role's list of required methods.
971 =item B<< $metarole->remove_required_methods(@names) >>
973 Removes the named methods from the role's list of required methods.
975 =item B<< $metarole->add_conflicting_method(%params) >>
977 Instantiate the parameters as a L<Moose::Meta::Role::Method::Conflicting>
978 object, then add it to the required method list.
982 =head2 Method modifiers
984 These methods act like their counterparts in L<Class::Mop::Class> and
985 L<Moose::Meta::Class>.
987 However, method modifiers are simply stored internally, and are not
988 applied until the role itself is applied to a class.
992 =item B<< $metarole->add_after_method_modifier($method_name, $method) >>
994 =item B<< $metarole->add_around_method_modifier($method_name, $method) >>
996 =item B<< $metarole->add_before_method_modifier($method_name, $method) >>
998 =item B<< $metarole->add_override_method_modifier($method_name, $method) >>
1000 These methods all add an appropriate modifier to the internal list of
1003 =item B<< $metarole->has_after_method_modifiers >>
1005 =item B<< $metarole->has_around_method_modifiers >>
1007 =item B<< $metarole->has_before_method_modifiers >>
1009 =item B<< $metarole->has_override_method_modifier >>
1011 Return true if the role has any modifiers of the given type.
1013 =item B<< $metarole->get_after_method_modifiers($method_name) >>
1015 =item B<< $metarole->get_around_method_modifiers($method_name) >>
1017 =item B<< $metarole->get_before_method_modifiers($method_name) >>
1019 Given a method name, returns a list of the appropriate modifiers for
1022 =item B<< $metarole->get_override_method_modifier($method_name) >>
1024 Given a method name, returns the override method modifier for that
1025 method, if it has one.
1029 =head2 Introspection
1033 =item B<< Moose::Meta::Role->meta >>
1035 This will return a L<Class::MOP::Class> instance for this class.
1041 All complex software has bugs lurking in it, and this module is no
1042 exception. If you find a bug please either email me, or add the bug
1047 Stevan Little E<lt>stevan@iinteractive.comE<gt>
1049 =head1 COPYRIGHT AND LICENSE
1051 Copyright 2006-2009 by Infinity Interactive, Inc.
1053 L<http://www.iinteractive.com>
1055 This library is free software; you can redistribute it and/or modify
1056 it under the same terms as Perl itself.