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 = '0.88';
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 && $name ) {
170 Moose->throw_error("You must provide a name for the attribute");
173 if (scalar @_ == 1 && ref($_[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::Application::RoleSummation;
518 require Moose::Meta::Role::Composite;
520 my (@roles, %role_params);
521 while (@role_specs) {
522 my ($role_name, $params) = @{ splice @role_specs, 0, 1 };
523 my $requested_role = Class::MOP::class_of($role_name);
525 my $actual_role = $requested_role->_role_for_combination($params);
526 push @roles => $actual_role;
528 next unless defined $params;
529 $role_params{$actual_role->name} = $params;
532 my $c = Moose::Meta::Role::Composite->new(roles => \@roles);
533 Moose::Meta::Role::Application::RoleSummation->new(
534 role_params => \%role_params
540 sub _role_for_combination {
541 my ($self, $params) = @_;
546 my ( $role, $package_name, %options ) = @_;
548 $options{package} = $package_name;
550 (ref $options{attributes} eq 'HASH')
551 || confess "You must pass a HASH ref of attributes"
552 if exists $options{attributes};
554 (ref $options{methods} eq 'HASH')
555 || confess "You must pass a HASH ref of methods"
556 if exists $options{methods};
558 my (%initialize_options) = %options;
559 delete @initialize_options{qw(
567 my $meta = $role->initialize( $package_name => %initialize_options );
569 $meta->_instantiate_module( $options{version}, $options{authority} );
572 $meta->add_method('meta' => sub {
573 $role->initialize(ref($_[0]) || $_[0]);
576 if (exists $options{attributes}) {
577 foreach my $attribute_name (keys %{$options{attributes}}) {
578 my $attr = $options{attributes}->{$attribute_name};
579 $meta->add_attribute($attribute_name => $attr);
583 if (exists $options{methods}) {
584 foreach my $method_name (keys %{$options{methods}}) {
585 $meta->add_method($method_name, $options{methods}->{$method_name});
589 Class::MOP::weaken_metaclass($meta->name)
590 if $meta->is_anon_role;
595 # anonymous roles. most of it is copied straight out of Class::MOP::Class.
596 # an intrepid hacker might find great riches if he unifies this code with that
597 # code in Class::MOP::Module or Class::MOP::Package
600 # this should be sufficient, if you have a
601 # use case where it is not, write a test and
603 my $ANON_ROLE_SERIAL = 0;
606 # we need a sufficiently annoying prefix
607 # this should suffice for now, this is
608 # used in a couple of places below, so
609 # need to put it up here for now.
610 my $ANON_ROLE_PREFIX = 'Moose::Meta::Role::__ANON__::SERIAL::';
614 no warnings 'uninitialized';
615 $self->name =~ /^$ANON_ROLE_PREFIX/;
618 sub create_anon_role {
619 my ($role, %options) = @_;
620 my $package_name = $ANON_ROLE_PREFIX . ++$ANON_ROLE_SERIAL;
621 return $role->create($package_name, %options);
625 # this will only get called for
626 # anon-roles, all other calls
627 # are assumed to occur during
628 # global destruction and so don't
629 # really need to be handled explicitly
633 return if in_global_destruction(); # it'll happen soon anyway and this just makes things more complicated
635 no warnings 'uninitialized';
636 return unless $self->name =~ /^$ANON_ROLE_PREFIX/;
638 # XXX: is this necessary for us? I don't understand what it's doing
641 # Moose does a weird thing where it replaces the metaclass for
642 # class when fixing metaclass incompatibility. In that case,
643 # we don't want to clean out the namespace now. We can detect
644 # that because Moose will explicitly update the singleton
645 # cache in Class::MOP.
646 #my $current_meta = Class::MOP::get_metaclass_by_name($self->name);
647 #return if $current_meta ne $self;
649 my ($serial_id) = ($self->name =~ /^$ANON_ROLE_PREFIX(\d+)/);
651 foreach my $key (keys %{$ANON_ROLE_PREFIX . $serial_id}) {
652 delete ${$ANON_ROLE_PREFIX . $serial_id}{$key};
654 delete ${'main::' . $ANON_ROLE_PREFIX}{$serial_id . '::'};
658 #####################################################################
660 ## This is Moose::Meta::Role as defined by Moose (plus the use of
661 ## MooseX::AttributeHelpers module). It is here as a reference to
662 ## make it easier to see what is happening above with all the meta
664 #####################################################################
667 # metaclass => 'Collection::Array',
668 # reader => 'get_roles',
669 # isa => 'ArrayRef[Moose::Meta::Role]',
670 # default => sub { [] },
672 # 'push' => 'add_role',
676 # has 'excluded_roles_map' => (
677 # metaclass => 'Collection::Hash',
678 # reader => 'get_excluded_roles_map',
679 # isa => 'HashRef[Str]',
681 # # Not exactly set, cause it sets multiple
682 # 'set' => 'add_excluded_roles',
683 # 'keys' => 'get_excluded_roles_list',
684 # 'exists' => 'excludes_role',
688 # has 'attribute_map' => (
689 # metaclass => 'Collection::Hash',
690 # reader => 'get_attribute_map',
691 # isa => 'HashRef[Str]',
693 # # 'set' => 'add_attribute' # has some special crap in it
694 # 'get' => 'get_attribute',
695 # 'keys' => 'get_attribute_list',
696 # 'exists' => 'has_attribute',
697 # # Not exactly delete, cause it sets multiple
698 # 'delete' => 'remove_attribute',
702 # has 'required_methods' => (
703 # metaclass => 'Collection::Hash',
704 # reader => 'get_required_methods_map',
705 # isa => 'HashRef[Moose::Meta::Role::Method::Required]',
707 # # not exactly set, or delete since it works for multiple
708 # 'set' => 'add_required_methods',
709 # 'delete' => 'remove_required_methods',
710 # 'keys' => 'get_required_method_list',
711 # 'exists' => 'requires_method',
715 # # the before, around and after modifiers are
716 # # HASH keyed by method-name, with ARRAY of
717 # # CODE refs to apply in that order
719 # has 'before_method_modifiers' => (
720 # metaclass => 'Collection::Hash',
721 # reader => 'get_before_method_modifiers_map',
722 # isa => 'HashRef[ArrayRef[CodeRef]]',
724 # 'keys' => 'get_before_method_modifiers',
725 # 'exists' => 'has_before_method_modifiers',
726 # # This actually makes sure there is an
727 # # ARRAY at the given key, and pushed onto
728 # # it. It also checks for duplicates as well
729 # # 'add' => 'add_before_method_modifier'
733 # has 'after_method_modifiers' => (
734 # metaclass => 'Collection::Hash',
735 # reader =>'get_after_method_modifiers_map',
736 # isa => 'HashRef[ArrayRef[CodeRef]]',
738 # 'keys' => 'get_after_method_modifiers',
739 # 'exists' => 'has_after_method_modifiers',
740 # # This actually makes sure there is an
741 # # ARRAY at the given key, and pushed onto
742 # # it. It also checks for duplicates as well
743 # # 'add' => 'add_after_method_modifier'
747 # has 'around_method_modifiers' => (
748 # metaclass => 'Collection::Hash',
749 # reader =>'get_around_method_modifiers_map',
750 # isa => 'HashRef[ArrayRef[CodeRef]]',
752 # 'keys' => 'get_around_method_modifiers',
753 # 'exists' => 'has_around_method_modifiers',
754 # # This actually makes sure there is an
755 # # ARRAY at the given key, and pushed onto
756 # # it. It also checks for duplicates as well
757 # # 'add' => 'add_around_method_modifier'
761 # # override is similar to the other modifiers
762 # # except that it is not an ARRAY of code refs
763 # # but instead just a single name->code mapping
765 # has 'override_method_modifiers' => (
766 # metaclass => 'Collection::Hash',
767 # reader =>'get_override_method_modifiers_map',
768 # isa => 'HashRef[CodeRef]',
770 # 'keys' => 'get_override_method_modifier',
771 # 'exists' => 'has_override_method_modifier',
772 # 'add' => 'add_override_method_modifier', # checks for local method ..
776 #####################################################################
787 Moose::Meta::Role - The Moose Role metaclass
791 This class is a subclass of L<Class::MOP::Module> that provides
792 additional Moose-specific functionality.
794 It's API looks a lot like L<Moose::Meta::Class>, but internally it
795 implements many things differently. This may change in the future.
799 C<Moose::Meta::Role> is a subclass of L<Class::MOP::Module>.
807 =item B<< Moose::Meta::Role->initialize($role_name) >>
809 This method creates a new role object with the provided name.
811 =item B<< Moose::Meta::Role->combine( [ $role => { ... } ], [ $role ], ... ) >>
813 This method accepts a list of array references. Each array reference
814 should contain a role name as its first element. The second element is
815 an optional hash reference. The hash reference can contain C<excludes>
816 and C<alias> keys to control how methods are composed from the role.
818 The return value is a new L<Moose::Meta::Role::Composite> that
819 represents the combined roles.
821 =item B<< Moose::Meta::Role->create($name, %options) >>
823 This method is identical to the L<Moose::Meta::Class> C<create>
826 =item B<< Moose::Meta::Role->create_anon_role >>
828 This method is identical to the L<Moose::Meta::Class>
829 C<create_anon_class> method.
831 =item B<< $metarole->is_anon_role >>
833 Returns true if the role is an anonymous role.
837 =head2 Role application
841 =item B<< $metarole->apply( $thing, @options ) >>
843 This method applies a role to the given C<$thing>. That can be another
844 L<Moose::Meta::Role>, object, a L<Moose::Meta::Class> object, or a
845 (non-meta) object instance.
847 The options are passed directly to the constructor for the appropriate
848 L<Moose::Meta::Role::Application> subclass.
850 Note that this will apply the role even if the C<$thing> in question already
851 C<does> this role. L<Moose::Util/does_role> is a convenient wrapper for
852 finding out if role application is necessary.
856 =head2 Roles and other roles
860 =item B<< $metarole->get_roles >>
862 This returns an array reference of roles which this role does. This
863 list may include duplicates.
865 =item B<< $metarole->calculate_all_roles >>
867 This returns a I<unique> list of all roles that this role does, and
868 all the roles that its roles do.
870 =item B<< $metarole->does_role($role_name) >>
872 Given a role I<name>, returns true if this role does the given
875 =item B<< $metarole->add_role($role) >>
877 Given a L<Moose::Meta::Role> object, this adds the role to the list of
878 roles that the role does.
880 =item B<< $metarole->get_excluded_roles_list >>
882 Returns a list of role names which this role excludes.
884 =item B<< $metarole->excludes_role($role_name) >>
886 Given a role I<name>, returns true if this role excludes the named
889 =item B<< $metarole->add_excluded_roles(@role_names) >>
891 Given one or more role names, adds those roles to the list of excluded
898 The methods for dealing with a role's methods are all identical in API
899 and behavior to the same methods in L<Class::MOP::Class>.
903 =item B<< $metarole->method_metaclass >>
905 Returns the method metaclass name for the role. This defaults to
906 L<Moose::Meta::Role::Method>.
908 =item B<< $metarole->get_method($name) >>
910 =item B<< $metarole->has_method($name) >>
912 =item B<< $metarole->add_method( $name, $body ) >>
914 =item B<< $metarole->get_method_list >>
916 =item B<< $metarole->get_method_map >>
918 =item B<< $metarole->find_method_by_name($name) >>
920 These methods are all identical to the methods of the same name in
927 As with methods, the methods for dealing with a role's attribute are
928 all identical in API and behavior to the same methods in
929 L<Class::MOP::Class>.
931 However, attributes stored in this class are I<not> stored as
932 objects. Rather, the attribute definition is stored as a hash
933 reference. When a role is composed into a class, this hash reference
934 is passed directly to the metaclass's C<add_attribute> method.
936 This is quite likely to change in the future.
940 =item B<< $metarole->get_attribute($attribute_name) >>
942 =item B<< $metarole->has_attribute($attribute_name) >>
944 =item B<< $metarole->get_attribute_map >>
946 =item B<< $metarole->get_attribute_list >>
948 =item B<< $metarole->add_attribute($name, %options) >>
950 =item B<< $metarole->remove_attribute($attribute_name) >>
954 =head2 Required methods
958 =item B<< $metarole->get_required_method_list >>
960 Returns the list of methods required by the role.
962 =item B<< $metarole->requires_method($name) >>
964 Returns true if the role requires the named method.
966 =item B<< $metarole->add_required_methods(@names) >>
968 Adds the named methods to the role's list of required methods.
970 =item B<< $metarole->remove_required_methods(@names) >>
972 Removes the named methods from the role's list of required methods.
974 =item B<< $metarole->add_conflicting_method(%params) >>
976 Instantiate the parameters as a L<Moose::Meta::Role::Method::Conflicting>
977 object, then add it to the required method list.
981 =head2 Method modifiers
983 These methods act like their counterparts in L<Class::Mop::Class> and
984 L<Moose::Meta::Class>.
986 However, method modifiers are simply stored internally, and are not
987 applied until the role itself is applied to a class.
991 =item B<< $metarole->add_after_method_modifier($method_name, $method) >>
993 =item B<< $metarole->add_around_method_modifier($method_name, $method) >>
995 =item B<< $metarole->add_before_method_modifier($method_name, $method) >>
997 =item B<< $metarole->add_override_method_modifier($method_name, $method) >>
999 These methods all add an appropriate modifier to the internal list of
1002 =item B<< $metarole->has_after_method_modifiers >>
1004 =item B<< $metarole->has_around_method_modifiers >>
1006 =item B<< $metarole->has_before_method_modifiers >>
1008 =item B<< $metarole->has_override_method_modifier >>
1010 Return true if the role has any modifiers of the given type.
1012 =item B<< $metarole->get_after_method_modifiers($method_name) >>
1014 =item B<< $metarole->get_around_method_modifiers($method_name) >>
1016 =item B<< $metarole->get_before_method_modifiers($method_name) >>
1018 Given a method name, returns a list of the appropriate modifiers for
1021 =item B<< $metarole->get_override_method_modifier($method_name) >>
1023 Given a method name, returns the override method modifier for that
1024 method, if it has one.
1028 =head2 Introspection
1032 =item B<< Moose::Meta::Role->meta >>
1034 This will return a L<Class::MOP::Class> instance for this class.
1040 All complex software has bugs lurking in it, and this module is no
1041 exception. If you find a bug please either email me, or add the bug
1046 Stevan Little E<lt>stevan@iinteractive.comE<gt>
1048 =head1 COPYRIGHT AND LICENSE
1050 Copyright 2006-2009 by Infinity Interactive, Inc.
1052 L<http://www.iinteractive.com>
1054 This library is free software; you can redistribute it and/or modify
1055 it under the same terms as Perl itself.