package Mouse::Meta::Role;
-use Mouse::Util qw(:meta not_supported english_list); # enables strict and warnings
+use Mouse::Util qw(:meta); # enables strict and warnings
use Mouse::Meta::Module;
our @ISA = qw(Mouse::Meta::Module);
-sub method_metaclass(){ 'Mouse::Meta::Role::Method' } # required for get_method()
+sub method_metaclass;
sub _construct_meta {
my $class = shift;
my %args = @_;
- $args{methods} ||= {};
- $args{attributes} ||= {};
- $args{required_methods} ||= [];
- $args{roles} ||= [];
+ $args{methods} = {};
+ $args{attributes} = {};
+ $args{required_methods} = [];
+ $args{roles} = [];
my $self = bless \%args, ref($class) || $class;
if($class ne __PACKAGE__){
return $self->create(undef, @_);
}
-sub is_anon_role{
- return exists $_[0]->{anon_serial_id};
-}
+sub is_anon_role;
-sub get_roles { $_[0]->{roles} }
+sub get_roles;
+
+sub calculate_all_roles {
+ my $self = shift;
+ my %seen;
+ return grep { !$seen{ $_->name }++ }
+ ($self, map { $_->calculate_all_roles } @{ $self->get_roles });
+}
sub get_required_method_list{
return @{ $_[0]->{required_methods} };
my $name = shift;
$self->{attributes}->{$name} = (@_ == 1) ? $_[0] : { @_ };
-}
-
-sub _check_required_methods{
- my($role, $applicant, $args) = @_;
-
- if($args->{_to} eq 'role'){
- $applicant->add_required_methods($role->get_required_method_list);
- }
- else{ # to class or instance
- my $class_name = $applicant->name;
- my $role_name = $role->name;
- my @missing;
- foreach my $method_name(@{$role->{required_methods}}){
- if(!($class_name->can($method_name) || exists $args->{to_be_provided}{$method_name})){
- push @missing, $method_name;
- }
- }
- if(@missing){
- $role->throw_error("'$role_name' requires the "
- . (@missing == 1 ? 'method' : 'methods')
- . " "
- . english_list(map{ sprintf q{'%s'}, $_ } @missing)
- . " to be implemented by '$class_name'");
- }
- }
-
- return;
-}
-
-sub _apply_methods{
- my($role, $applicant, $args) = @_;
-
- my $role_name = $role->name;
- my $class_name = $applicant->name;
-
- my $alias = $args->{-alias};
- my $excludes = $args->{-excludes};
-
- foreach my $method_name($role->get_method_list){
- next if $method_name eq 'meta';
-
- my $code = $role->get_method_body($method_name);
-
- if($excludes && !exists $excludes->{$method_name}){
- if(!$applicant->has_method($method_name)){
- # The third argument, $role, is used in Role::Composite
- $applicant->add_method($method_name => $code, $role);
- }
- }
-
- if($alias && $alias->{$method_name}){
- my $dstname = $alias->{$method_name};
-
- my $dstcode = $applicant->get_method_body($dstname);
-
- if(defined($dstcode) && $dstcode != $code){
- $role->throw_error("Cannot create a method alias if a local method of the same name exists");
- }
- else{
- $applicant->add_method($dstname => $code, $role);
- }
- }
- }
-
- return;
-}
-
-sub _apply_attributes{
- my($role, $applicant, $args) = @_;
-
- for my $attr_name ($role->get_attribute_list) {
- next if $applicant->has_attribute($attr_name);
-
- $applicant->add_attribute($attr_name => $role->get_attribute($attr_name));
- }
- return;
-}
-
-sub _apply_modifiers{
- my($role, $applicant, $args) = @_;
-
- for my $modifier_type (qw/override before around after/) {
- my $modifiers = $role->{"${modifier_type}_method_modifiers"}
- or next;
-
- my $add_modifier = "add_${modifier_type}_method_modifier";
-
- foreach my $method_name (keys %{$modifiers}){
- my $modifier_codes = $modifiers->{$method_name};
- foreach my $code(ref($modifier_codes) eq 'ARRAY' ? @{$modifier_codes} : $modifier_codes){
- next if $applicant->{"_$modifier_type"}{$code}++; # skip applied modifiers
- $applicant->$add_modifier($method_name => $code);
- }
- }
- }
return;
}
-sub _append_roles{
- my($role, $applicant, $args) = @_;
-
- my $roles = ($args->{_to} eq 'role') ? $applicant->get_roles : $applicant->roles;
-
- foreach my $r($role, @{$role->get_roles}){
- if(!$applicant->does_role($r->name)){
- push @{$roles}, $r;
- }
- }
- return;
-}
# Moose uses Application::ToInstance, Application::ToClass, Application::ToRole
sub apply {
- my $self = shift;
- my $applicant = shift;
-
- my %args = (@_ == 1) ? %{ $_[0] } : @_;
-
- if($applicant->isa('Mouse::Meta::Class')){ # Application::ToClass
- $args{_to} = 'class';
- }
- elsif($applicant->isa('Mouse::Meta::Role')){ # Application::ToRole
- $args{_to} = 'role';
- }
- else{ # Appplication::ToInstance
- $args{_to} = 'instance';
-
- my $metaclass = $applicant->meta->create_anon_class(
- superclasses => [ref $applicant],
- cache => 1,
- );
- bless $applicant, $metaclass->name; # rebless
-
- $applicant = $metaclass;
- }
-
- if($args{alias} && !exists $args{-alias}){
- $args{-alias} = $args{alias};
- }
- if($args{excludes} && !exists $args{-excludes}){
- $args{-excludes} = $args{excludes};
- }
-
- # In Moose it is called 'aliased methods'
- $args{to_be_provided} = {};
- if(my $alias = $args{-alias}){
- @{$args{to_be_provided}}{ values %{$alias} } = ();
- }
- @{ $args{to_be_provided} }{ $self->get_method_list } = ();
-
- if(my $excludes = $args{-excludes}){
- $args{-excludes} = {}; # replace with a hash ref
- if(ref $excludes){
- %{$args{-excludes}} = (map{ $_ => undef } @{$excludes});
- }
- else{
- $args{-excludes}{$excludes} = undef;
- }
- }
+ my $self = shift;
+ my $consumer = shift;
- $self->_check_required_methods($applicant, \%args);
- $self->_apply_attributes($applicant, \%args);
- $self->_apply_methods($applicant, \%args);
- $self->_apply_modifiers($applicant, \%args);
- $self->_append_roles($applicant, \%args);
- return;
+ require 'Mouse/Meta/Role/Application.pm';
+ return Mouse::Meta::Role::Application->new(@_)->apply($self, $consumer);
}
sub combine {
- my($role_class, @role_specs) = @_;
-
- require 'Mouse/Meta/Role/Composite.pm'; # we don't want to create its namespace
+ my($self, @role_specs) = @_;
+ require 'Mouse/Meta/Role/Composite.pm';
my $composite = Mouse::Meta::Role::Composite->create_anon_role();
foreach my $role_spec (@role_specs) {
return $composite;
}
-for my $modifier_type (qw/before after around/) {
-
- my $modifier = "${modifier_type}_method_modifiers";
- my $add_method_modifier = sub {
- my ($self, $method_name, $method) = @_;
-
- push @{ $self->{$modifier}->{$method_name} ||= [] }, $method;
- return;
- };
- my $has_method_modifiers = sub{
- my($self, $method_name) = @_;
- my $m = $self->{$modifier}->{$method_name};
- return $m && @{$m} != 0;
- };
- my $get_method_modifiers = sub {
- my ($self, $method_name) = @_;
- return @{ $self->{$modifier}->{$method_name} ||= [] }
- };
-
- no strict 'refs';
- *{ 'add_' . $modifier_type . '_method_modifier' } = $add_method_modifier;
- *{ 'has_' . $modifier_type . '_method_modifiers' } = $has_method_modifiers;
- *{ 'get_' . $modifier_type . '_method_modifiers' } = $get_method_modifiers;
-}
+sub add_before_method_modifier;
+sub add_around_method_modifier;
+sub add_after_method_modifier;
+
+sub get_before_method_modifiers;
+sub get_around_method_modifiers;
+sub get_after_method_modifiers;
sub add_override_method_modifier{
my($self, $method_name, $method) = @_;
$self->{override_method_modifiers}->{$method_name} = $method;
}
-sub has_override_method_modifier {
- my ($self, $method_name) = @_;
- return exists $self->{override_method_modifiers}->{$method_name};
-}
-
sub get_override_method_modifier {
my ($self, $method_name) = @_;
return $self->{override_method_modifiers}->{$method_name};
}
-sub get_method_modifier_list {
- my($self, $modifier_type) = @_;
-
- return keys %{ $self->{$modifier_type . '_method_modifiers'} };
-}
-
-# This is currently not passing all the Moose tests.
sub does_role {
my ($self, $role_name) = @_;
(defined $role_name)
|| $self->throw_error("You must supply a role name to look for");
+ $role_name = $role_name->name if ref $role_name;
+
# if we are it,.. then return true
return 1 if $role_name eq $self->name;
# otherwise.. check our children
return 0;
}
-
1;
-
__END__
=head1 NAME
Mouse::Meta::Role - The Mouse Role metaclass
+=head1 VERSION
+
+This document describes Mouse version 0.70
+
+=head1 DESCRIPTION
+
+This class is a meta object protocol for Mouse roles,
+which is a subset of Moose::Meta:::Role.
+
=head1 SEE ALSO
L<Moose::Meta::Role>
projects / gitmo/Mouse.git / blobdiff