2 package Mouse::Meta::Role;
10 # because Mouse doesn't introspect existing classes, we're forced to
11 # only pay attention to other Mouse classes
12 sub _metaclass_cache {
15 return $METACLASS_CACHE{$name};
21 $METACLASS_CACHE{$name} = $class->new(name => $name)
22 if !exists($METACLASS_CACHE{$name});
23 return $METACLASS_CACHE{$name};
31 $args{attributes} ||= {};
32 $args{required_methods} ||= [];
37 sub name { $_[0]->{name} }
39 sub add_required_methods {
42 push @{$self->{required_methods}}, @methods;
49 $self->{attributes}->{$name} = $spec;
52 sub has_attribute { exists $_[0]->{attributes}->{$_[1]} }
53 sub get_attribute_list { keys %{ $_[0]->{attributes} } }
54 sub get_attribute { $_[0]->{attributes}->{$_[1]} }
56 # copied from Class::Inspector
59 my $name = $self->name;
62 # Get all the CODE symbol table entries
63 my @functions = grep !/^meta$/,
64 grep { /\A[^\W\d]\w*\z/o }
65 grep { defined &{"${name}::$_"} }
67 wantarray ? @functions : \@functions;
72 my $selfname = $self->name;
74 my $classname = $class->name;
76 for my $name (@{$self->{required_methods}}) {
77 unless ($classname->can($name)) {
78 confess "'$selfname' requires the method '$name' to be implemented by '$classname'";
84 for my $name ($self->get_method_list) {
85 next if $name eq 'has' || $name eq 'requires' || $name eq 'meta' || $name eq 'with' || $name eq 'around' || $name eq 'before' || $name eq 'after' || $name eq 'blessed' || $name eq 'extends' || $name eq 'confess' || $name eq 'excludes';
86 if ($classname->can($name)) {
87 # XXX what's Moose's behavior?
90 *{"${classname}::${name}"} = *{"${selfname}::${name}"};
94 if ($class->isa('Mouse::Meta::Class')) {
96 for my $name ($self->get_attribute_list) {
97 next if $class->has_attribute($name);
98 my $spec = $self->get_attribute($name);
99 Mouse::Meta::Attribute->create($class, $name, %$spec);
103 # XXX Room for speed improvement
104 for my $name ($self->get_attribute_list) {
105 next if $class->has_attribute($name);
106 my $spec = $self->get_attribute($name);
107 $class->add_attribute($name, $spec);
111 # XXX Room for speed improvement in role to role
112 for my $modifier_type (qw/before after around/) {
113 my $add_method = "add_${modifier_type}_method_modifier";
114 my $modified = $self->{"${modifier_type}_method_modifiers"};
116 for my $method_name (keys %$modified) {
117 for my $code (@{ $modified->{$method_name} }) {
118 $class->$add_method($method_name => $code);
124 for my $modifier_type (qw/before after around/) {
126 *{ __PACKAGE__ . '::' . "add_${modifier_type}_method_modifier" } = sub {
127 my ($self, $method_name, $method) = @_;
129 push @{ $self->{"${modifier_type}_method_modifiers"}->{$method_name} },
133 *{ __PACKAGE__ . '::' . "get_${modifier_type}_method_modifiers" } = sub {
134 my ($self, $method_name, $method) = @_;
135 @{ $self->{"${modifier_type}_method_modifiers"}->{$method_name} || [] }