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 ## some things don't always fit, so they go here ...
168 unless ( defined $name ) {
170 Moose->throw_error("You must provide a name for the attribute");
173 if (scalar @_ == 1 && ref($_[0]) eq 'HASH') {
179 $self->get_attribute_map->{$name} = $attr_desc;
182 sub add_required_methods {
187 if (!blessed($method)) {
188 $method = $self->required_method_metaclass->new(
192 $self->get_required_methods_map->{$method->name} = $method;
196 sub add_conflicting_method {
200 if (@_ == 1 && blessed($_[0])) {
204 $method = $self->conflicting_method_metaclass->new(@_);
207 $self->add_required_methods($method);
210 ## ------------------------------------------------------------------
214 # the before/around/after method modifiers are
215 # stored by name, but there can be many methods
216 # then associated with that name. So again we have
217 # lots of similar functionality, so we can do some
218 # meta-programmin' and save some time.
221 foreach my $modifier_type (qw[ before around after ]) {
223 my $attr_reader = "get_${modifier_type}_method_modifiers_map";
225 # create the attribute ...
226 $META->add_attribute("${modifier_type}_method_modifiers" => (
227 reader => $attr_reader,
228 default => sub { {} }
231 # and some helper methods ...
232 $META->add_method("get_${modifier_type}_method_modifiers" => sub {
233 my ($self, $method_name) = @_;
234 #return () unless exists $self->$attr_reader->{$method_name};
235 my $mm = $self->$attr_reader->{$method_name};
239 $META->add_method("has_${modifier_type}_method_modifiers" => sub {
240 my ($self, $method_name) = @_;
242 # for now we assume that if it exists,..
243 # it has at least one modifier in it
244 (exists $self->$attr_reader->{$method_name}) ? 1 : 0;
247 $META->add_method("add_${modifier_type}_method_modifier" => sub {
248 my ($self, $method_name, $method) = @_;
250 $self->$attr_reader->{$method_name} = []
251 unless exists $self->$attr_reader->{$method_name};
253 my $modifiers = $self->$attr_reader->{$method_name};
256 # check to see that we aren't adding the
257 # same code twice. We err in favor of the
258 # first on here, this may not be as expected
259 foreach my $modifier (@{$modifiers}) {
260 return if $modifier == $method;
263 push @{$modifiers} => $method;
268 ## ------------------------------------------------------------------
269 ## override method mofidiers
271 $META->add_attribute('override_method_modifiers' => (
272 reader => 'get_override_method_modifiers_map',
273 default => sub { {} }
277 # these are a little different because there
278 # can only be one per name, whereas the other
279 # method modifiers can have multiples.
282 sub add_override_method_modifier {
283 my ($self, $method_name, $method) = @_;
284 (!$self->has_method($method_name))
285 || Moose->throw_error("Cannot add an override of method '$method_name' " .
286 "because there is a local version of '$method_name'");
287 $self->get_override_method_modifiers_map->{$method_name} = $method;
290 sub has_override_method_modifier {
291 my ($self, $method_name) = @_;
293 # for now we assume that if it exists,..
294 # it has at least one modifier in it
295 (exists $self->get_override_method_modifiers_map->{$method_name}) ? 1 : 0;
298 sub get_override_method_modifier {
299 my ($self, $method_name) = @_;
300 $self->get_override_method_modifiers_map->{$method_name};
303 ## general list accessor ...
305 sub get_method_modifier_list {
306 my ($self, $modifier_type) = @_;
307 my $accessor = "get_${modifier_type}_method_modifiers_map";
308 keys %{$self->$accessor};
311 sub reset_package_cache_flag { (shift)->{'_package_cache_flag'} = undef }
312 sub update_package_cache_flag {
314 $self->{'_package_cache_flag'} = Class::MOP::check_package_cache_flag($self->name);
319 ## ------------------------------------------------------------------
322 $META->add_attribute('roles' => (
323 reader => 'get_roles',
324 default => sub { [] }
328 my ($self, $role) = @_;
329 (blessed($role) && $role->isa('Moose::Meta::Role'))
330 || Moose->throw_error("Roles must be instances of Moose::Meta::Role");
331 push @{$self->get_roles} => $role;
332 $self->reset_package_cache_flag;
335 sub calculate_all_roles {
341 $_->calculate_all_roles
342 } @{ $self->get_roles });
346 my ($self, $role_name) = @_;
348 || Moose->throw_error("You must supply a role name to look for");
349 # if we are it,.. then return true
350 return 1 if $role_name eq $self->name;
351 # otherwise.. check our children
352 foreach my $role (@{$self->get_roles}) {
353 return 1 if $role->does_role($role_name);
358 ## ------------------------------------------------------------------
364 my $current = Class::MOP::check_package_cache_flag($self->name);
366 if (defined $self->{'_package_cache_flag'} && $self->{'_package_cache_flag'} == $current) {
367 return $self->{'methods'} ||= {};
370 $self->{_package_cache_flag} = $current;
372 my $map = $self->{'methods'} ||= {};
374 my $role_name = $self->name;
375 my $method_metaclass = $self->method_metaclass;
377 my $all_code = $self->get_all_package_symbols('CODE');
379 foreach my $symbol (keys %{ $all_code }) {
380 my $code = $all_code->{$symbol};
382 next if exists $map->{$symbol} &&
383 defined $map->{$symbol} &&
384 $map->{$symbol}->body == $code;
386 my ($pkg, $name) = Class::MOP::get_code_info($code);
387 my $meta = Class::MOP::class_of($pkg);
389 if ($meta && $meta->isa('Moose::Meta::Role')) {
390 my $role = $meta->name;
391 next unless $self->does_role($role);
395 # in 5.10 constant.pm the constants show up
396 # as being in the right package, but in pre-5.10
397 # they show up as constant::__ANON__ so we
398 # make an exception here to be sure that things
399 # work as expected in both.
401 unless ($pkg eq 'constant' && $name eq '__ANON__') {
402 next if ($pkg || '') ne $role_name ||
403 (($name || '') ne '__ANON__' && ($pkg || '') ne $role_name);
407 $map->{$symbol} = $method_metaclass->wrap(
409 package_name => $role_name,
418 my ($self, $name) = @_;
419 $self->get_method_map->{$name};
423 my ($self, $name) = @_;
424 exists $self->get_method_map->{$name} ? 1 : 0
427 # FIXME this is copy-pasted from Class::MOP::Class
428 # refactor to inherit from some common base
429 sub wrap_method_body {
430 my ( $self, %args ) = @_;
432 ('CODE' eq ref $args{body})
433 || Moose->throw_error("Your code block must be a CODE reference");
435 $self->method_metaclass->wrap(
436 package_name => $self->name,
442 my ($self, $method_name, $method) = @_;
443 (defined $method_name && $method_name)
444 || Moose->throw_error("You must define a method name");
447 if (blessed($method)) {
448 $body = $method->body;
449 if ($method->package_name ne $self->name) {
450 $method = $method->clone(
451 package_name => $self->name,
453 ) if $method->can('clone');
458 $method = $self->wrap_method_body( body => $body, name => $method_name );
461 $method->attach_to_class($self);
463 $self->get_method_map->{$method_name} = $method;
465 my $full_method_name = ($self->name . '::' . $method_name);
466 $self->add_package_symbol(
467 { sigil => '&', type => 'CODE', name => $method_name },
468 subname($full_method_name => $body)
471 $self->update_package_cache_flag; # still valid, since we just added the method to the map, and if it was invalid before that then get_method_map updated it
474 sub find_method_by_name { (shift)->get_method(@_) }
476 sub get_method_list {
478 grep { !/^meta$/ } keys %{$self->get_method_map};
482 Carp::cluck("The alias_method method is deprecated. Use add_method instead.\n");
486 $self->add_method(@_);
489 ## ------------------------------------------------------------------
491 ## ------------------------------------------------------------------
494 my ($self, $other, @args) = @_;
497 || Moose->throw_error("You must pass in an blessed instance");
499 my $application_class;
500 if ($other->isa('Moose::Meta::Role')) {
501 $application_class = $self->application_to_role_class;
503 elsif ($other->isa('Moose::Meta::Class')) {
504 $application_class = $self->application_to_class_class;
507 $application_class = $self->application_to_instance_class;
510 Class::MOP::load_class($application_class);
511 return $application_class->new(@args)->apply($self, $other);
515 my ($class, @role_specs) = @_;
517 require Moose::Meta::Role::Composite;
519 my (@roles, %role_params);
520 while (@role_specs) {
521 my ($role_name, $params) = @{ splice @role_specs, 0, 1 };
522 my $requested_role = Class::MOP::class_of($role_name);
524 my $actual_role = $requested_role->_role_for_combination($params);
525 push @roles => $actual_role;
527 next unless defined $params;
528 $role_params{$actual_role->name} = $params;
531 my $c = Moose::Meta::Role::Composite->new(roles => \@roles);
532 return $c->apply_params(\%role_params);
535 sub _role_for_combination {
536 my ($self, $params) = @_;
541 my ( $role, $package_name, %options ) = @_;
543 $options{package} = $package_name;
545 (ref $options{attributes} eq 'HASH')
546 || confess "You must pass a HASH ref of attributes"
547 if exists $options{attributes};
549 (ref $options{methods} eq 'HASH')
550 || confess "You must pass a HASH ref of methods"
551 if exists $options{methods};
553 my (%initialize_options) = %options;
554 delete @initialize_options{qw(
562 my $meta = $role->initialize( $package_name => %initialize_options );
564 $meta->_instantiate_module( $options{version}, $options{authority} );
567 $meta->add_method('meta' => sub {
568 $role->initialize(ref($_[0]) || $_[0]);
571 if (exists $options{attributes}) {
572 foreach my $attribute_name (keys %{$options{attributes}}) {
573 my $attr = $options{attributes}->{$attribute_name};
574 $meta->add_attribute($attribute_name => $attr);
578 if (exists $options{methods}) {
579 foreach my $method_name (keys %{$options{methods}}) {
580 $meta->add_method($method_name, $options{methods}->{$method_name});
584 Class::MOP::weaken_metaclass($meta->name)
585 if $meta->is_anon_role;
590 # anonymous roles. most of it is copied straight out of Class::MOP::Class.
591 # an intrepid hacker might find great riches if he unifies this code with that
592 # code in Class::MOP::Module or Class::MOP::Package
595 # this should be sufficient, if you have a
596 # use case where it is not, write a test and
598 my $ANON_ROLE_SERIAL = 0;
601 # we need a sufficiently annoying prefix
602 # this should suffice for now, this is
603 # used in a couple of places below, so
604 # need to put it up here for now.
605 my $ANON_ROLE_PREFIX = 'Moose::Meta::Role::__ANON__::SERIAL::';
609 no warnings 'uninitialized';
610 $self->name =~ /^$ANON_ROLE_PREFIX/;
613 sub create_anon_role {
614 my ($role, %options) = @_;
615 my $package_name = $ANON_ROLE_PREFIX . ++$ANON_ROLE_SERIAL;
616 return $role->create($package_name, %options);
620 # this will only get called for
621 # anon-roles, all other calls
622 # are assumed to occur during
623 # global destruction and so don't
624 # really need to be handled explicitly
628 return if in_global_destruction(); # it'll happen soon anyway and this just makes things more complicated
630 no warnings 'uninitialized';
631 return unless $self->name =~ /^$ANON_ROLE_PREFIX/;
633 # XXX: is this necessary for us? I don't understand what it's doing
636 # Moose does a weird thing where it replaces the metaclass for
637 # class when fixing metaclass incompatibility. In that case,
638 # we don't want to clean out the namespace now. We can detect
639 # that because Moose will explicitly update the singleton
640 # cache in Class::MOP.
641 #my $current_meta = Class::MOP::get_metaclass_by_name($self->name);
642 #return if $current_meta ne $self;
644 my ($serial_id) = ($self->name =~ /^$ANON_ROLE_PREFIX(\d+)/);
646 foreach my $key (keys %{$ANON_ROLE_PREFIX . $serial_id}) {
647 delete ${$ANON_ROLE_PREFIX . $serial_id}{$key};
649 delete ${'main::' . $ANON_ROLE_PREFIX}{$serial_id . '::'};
653 #####################################################################
655 ## This is Moose::Meta::Role as defined by Moose (plus the use of
656 ## MooseX::AttributeHelpers module). It is here as a reference to
657 ## make it easier to see what is happening above with all the meta
659 #####################################################################
662 # metaclass => 'Array',
663 # reader => 'get_roles',
664 # isa => 'ArrayRef[Moose::Meta::Role]',
665 # default => sub { [] },
667 # 'push' => 'add_role',
671 # has 'excluded_roles_map' => (
672 # metaclass => 'Hash',
673 # reader => 'get_excluded_roles_map',
674 # isa => 'HashRef[Str]',
676 # # Not exactly set, cause it sets multiple
677 # 'set' => 'add_excluded_roles',
678 # 'keys' => 'get_excluded_roles_list',
679 # 'exists' => 'excludes_role',
683 # has 'attribute_map' => (
684 # metaclass => 'Hash',
685 # reader => 'get_attribute_map',
686 # isa => 'HashRef[Str]',
688 # # 'set' => 'add_attribute' # has some special crap in it
689 # 'get' => 'get_attribute',
690 # 'keys' => 'get_attribute_list',
691 # 'exists' => 'has_attribute',
692 # # Not exactly delete, cause it sets multiple
693 # 'delete' => 'remove_attribute',
697 # has 'required_methods' => (
698 # metaclass => 'Hash',
699 # reader => 'get_required_methods_map',
700 # isa => 'HashRef[Moose::Meta::Role::Method::Required]',
702 # # not exactly set, or delete since it works for multiple
703 # 'set' => 'add_required_methods',
704 # 'delete' => 'remove_required_methods',
705 # 'keys' => 'get_required_method_list',
706 # 'exists' => 'requires_method',
710 # # the before, around and after modifiers are
711 # # HASH keyed by method-name, with ARRAY of
712 # # CODE refs to apply in that order
714 # has 'before_method_modifiers' => (
715 # metaclass => 'Hash',
716 # reader => 'get_before_method_modifiers_map',
717 # isa => 'HashRef[ArrayRef[CodeRef]]',
719 # 'keys' => 'get_before_method_modifiers',
720 # 'exists' => 'has_before_method_modifiers',
721 # # This actually makes sure there is an
722 # # ARRAY at the given key, and pushed onto
723 # # it. It also checks for duplicates as well
724 # # 'add' => 'add_before_method_modifier'
728 # has 'after_method_modifiers' => (
729 # metaclass => 'Hash',
730 # reader =>'get_after_method_modifiers_map',
731 # isa => 'HashRef[ArrayRef[CodeRef]]',
733 # 'keys' => 'get_after_method_modifiers',
734 # 'exists' => 'has_after_method_modifiers',
735 # # This actually makes sure there is an
736 # # ARRAY at the given key, and pushed onto
737 # # it. It also checks for duplicates as well
738 # # 'add' => 'add_after_method_modifier'
742 # has 'around_method_modifiers' => (
743 # metaclass => 'Hash',
744 # reader =>'get_around_method_modifiers_map',
745 # isa => 'HashRef[ArrayRef[CodeRef]]',
747 # 'keys' => 'get_around_method_modifiers',
748 # 'exists' => 'has_around_method_modifiers',
749 # # This actually makes sure there is an
750 # # ARRAY at the given key, and pushed onto
751 # # it. It also checks for duplicates as well
752 # # 'add' => 'add_around_method_modifier'
756 # # override is similar to the other modifiers
757 # # except that it is not an ARRAY of code refs
758 # # but instead just a single name->code mapping
760 # has 'override_method_modifiers' => (
761 # metaclass => 'Hash',
762 # reader =>'get_override_method_modifiers_map',
763 # isa => 'HashRef[CodeRef]',
765 # 'keys' => 'get_override_method_modifier',
766 # 'exists' => 'has_override_method_modifier',
767 # 'add' => 'add_override_method_modifier', # checks for local method ..
771 #####################################################################
782 Moose::Meta::Role - The Moose Role metaclass
786 This class is a subclass of L<Class::MOP::Module> that provides
787 additional Moose-specific functionality.
789 It's API looks a lot like L<Moose::Meta::Class>, but internally it
790 implements many things differently. This may change in the future.
794 C<Moose::Meta::Role> is a subclass of L<Class::MOP::Module>.
802 =item B<< Moose::Meta::Role->initialize($role_name) >>
804 This method creates a new role object with the provided name.
806 =item B<< Moose::Meta::Role->combine( [ $role => { ... } ], [ $role ], ... ) >>
808 This method accepts a list of array references. Each array reference
809 should contain a role name as its first element. The second element is
810 an optional hash reference. The hash reference can contain C<-excludes>
811 and C<-alias> keys to control how methods are composed from the role.
813 The return value is a new L<Moose::Meta::Role::Composite> that
814 represents the combined roles.
816 =item B<< Moose::Meta::Role->create($name, %options) >>
818 This method is identical to the L<Moose::Meta::Class> C<create>
821 =item B<< Moose::Meta::Role->create_anon_role >>
823 This method is identical to the L<Moose::Meta::Class>
824 C<create_anon_class> method.
826 =item B<< $metarole->is_anon_role >>
828 Returns true if the role is an anonymous role.
832 =head2 Role application
836 =item B<< $metarole->apply( $thing, @options ) >>
838 This method applies a role to the given C<$thing>. That can be another
839 L<Moose::Meta::Role>, object, a L<Moose::Meta::Class> object, or a
840 (non-meta) object instance.
842 The options are passed directly to the constructor for the appropriate
843 L<Moose::Meta::Role::Application> subclass.
845 Note that this will apply the role even if the C<$thing> in question already
846 C<does> this role. L<Moose::Util/does_role> is a convenient wrapper for
847 finding out if role application is necessary.
851 =head2 Roles and other roles
855 =item B<< $metarole->get_roles >>
857 This returns an array reference of roles which this role does. This
858 list may include duplicates.
860 =item B<< $metarole->calculate_all_roles >>
862 This returns a I<unique> list of all roles that this role does, and
863 all the roles that its roles do.
865 =item B<< $metarole->does_role($role_name) >>
867 Given a role I<name>, returns true if this role does the given
870 =item B<< $metarole->add_role($role) >>
872 Given a L<Moose::Meta::Role> object, this adds the role to the list of
873 roles that the role does.
875 =item B<< $metarole->get_excluded_roles_list >>
877 Returns a list of role names which this role excludes.
879 =item B<< $metarole->excludes_role($role_name) >>
881 Given a role I<name>, returns true if this role excludes the named
884 =item B<< $metarole->add_excluded_roles(@role_names) >>
886 Given one or more role names, adds those roles to the list of excluded
893 The methods for dealing with a role's methods are all identical in API
894 and behavior to the same methods in L<Class::MOP::Class>.
898 =item B<< $metarole->method_metaclass >>
900 Returns the method metaclass name for the role. This defaults to
901 L<Moose::Meta::Role::Method>.
903 =item B<< $metarole->get_method($name) >>
905 =item B<< $metarole->has_method($name) >>
907 =item B<< $metarole->add_method( $name, $body ) >>
909 =item B<< $metarole->get_method_list >>
911 =item B<< $metarole->get_method_map >>
913 =item B<< $metarole->find_method_by_name($name) >>
915 These methods are all identical to the methods of the same name in
922 As with methods, the methods for dealing with a role's attribute are
923 all identical in API and behavior to the same methods in
924 L<Class::MOP::Class>.
926 However, attributes stored in this class are I<not> stored as
927 objects. Rather, the attribute definition is stored as a hash
928 reference. When a role is composed into a class, this hash reference
929 is passed directly to the metaclass's C<add_attribute> method.
931 This is quite likely to change in the future.
935 =item B<< $metarole->get_attribute($attribute_name) >>
937 =item B<< $metarole->has_attribute($attribute_name) >>
939 =item B<< $metarole->get_attribute_map >>
941 =item B<< $metarole->get_attribute_list >>
943 =item B<< $metarole->add_attribute($name, %options) >>
945 =item B<< $metarole->remove_attribute($attribute_name) >>
949 =head2 Required methods
953 =item B<< $metarole->get_required_method_list >>
955 Returns the list of methods required by the role.
957 =item B<< $metarole->requires_method($name) >>
959 Returns true if the role requires the named method.
961 =item B<< $metarole->add_required_methods(@names) >>
963 Adds the named methods to the role's list of required methods.
965 =item B<< $metarole->remove_required_methods(@names) >>
967 Removes the named methods from the role's list of required methods.
969 =item B<< $metarole->add_conflicting_method(%params) >>
971 Instantiate the parameters as a L<Moose::Meta::Role::Method::Conflicting>
972 object, then add it to the required method list.
976 =head2 Method modifiers
978 These methods act like their counterparts in L<Class::Mop::Class> and
979 L<Moose::Meta::Class>.
981 However, method modifiers are simply stored internally, and are not
982 applied until the role itself is applied to a class.
986 =item B<< $metarole->add_after_method_modifier($method_name, $method) >>
988 =item B<< $metarole->add_around_method_modifier($method_name, $method) >>
990 =item B<< $metarole->add_before_method_modifier($method_name, $method) >>
992 =item B<< $metarole->add_override_method_modifier($method_name, $method) >>
994 These methods all add an appropriate modifier to the internal list of
997 =item B<< $metarole->has_after_method_modifiers >>
999 =item B<< $metarole->has_around_method_modifiers >>
1001 =item B<< $metarole->has_before_method_modifiers >>
1003 =item B<< $metarole->has_override_method_modifier >>
1005 Return true if the role has any modifiers of the given type.
1007 =item B<< $metarole->get_after_method_modifiers($method_name) >>
1009 =item B<< $metarole->get_around_method_modifiers($method_name) >>
1011 =item B<< $metarole->get_before_method_modifiers($method_name) >>
1013 Given a method name, returns a list of the appropriate modifiers for
1016 =item B<< $metarole->get_override_method_modifier($method_name) >>
1018 Given a method name, returns the override method modifier for that
1019 method, if it has one.
1023 =head2 Introspection
1027 =item B<< Moose::Meta::Role->meta >>
1029 This will return a L<Class::MOP::Class> instance for this class.
1035 All complex software has bugs lurking in it, and this module is no
1036 exception. If you find a bug please either email me, or add the bug
1041 Stevan Little E<lt>stevan@iinteractive.comE<gt>
1043 =head1 COPYRIGHT AND LICENSE
1045 Copyright 2006-2009 by Infinity Interactive, Inc.
1047 L<http://www.iinteractive.com>
1049 This library is free software; you can redistribute it and/or modify
1050 it under the same terms as Perl itself.