7 use Scalar::Util 'blessed';
9 use Mouse::Util qw(load_class not_supported);
12 our @EXPORT = qw(before after around super override inner augment has extends with requires excludes confess blessed);
26 our %is_removable = map{ $_ => undef } @EXPORT;
27 delete $is_removable{confess};
28 delete $is_removable{blessed};
31 my $meta = Mouse::Meta::Role->initialize(scalar caller);
35 $meta->add_before_method_modifier($_ => $code);
40 my $meta = Mouse::Meta::Role->initialize(scalar caller);
44 $meta->add_after_method_modifier($_ => $code);
49 my $meta = Mouse::Meta::Role->initialize(scalar caller);
53 $meta->add_around_method_modifier($_ => $code);
59 return unless $Mouse::SUPER_BODY;
60 $Mouse::SUPER_BODY->(@Mouse::SUPER_ARGS);
64 my $classname = caller;
65 my $meta = Mouse::Meta::Role->initialize($classname);
69 my $fullname = "${classname}::${name}";
72 && $meta->throw_error("Cannot add an override of method '$fullname' "
73 . "because there is a local version of '$fullname'");
75 $meta->add_override_method_modifier($name => sub {
76 local $Mouse::SUPER_PACKAGE = shift;
77 local $Mouse::SUPER_BODY = shift;
78 local @Mouse::SUPER_ARGS = @_;
84 # We keep the same errors messages as Moose::Role emits, here.
86 Carp::croak "Roles cannot support 'inner'";
90 Carp::croak "Roles cannot support 'augment'";
94 my $meta = Mouse::Meta::Role->initialize(scalar caller);
99 $meta->add_attribute($name => \%opts);
103 Carp::croak "Roles do not support 'extends'"
107 my $meta = Mouse::Meta::Role->initialize(scalar caller);
108 Mouse::Util::apply_all_roles($meta->name, @_);
112 my $meta = Mouse::Meta::Role->initialize(scalar caller);
113 $meta->throw_error("Must specify at least one method") unless @_;
114 $meta->add_required_methods(@_);
129 # we should never export to main
130 if ($caller eq 'main') {
131 warn qq{$class does not export its sugar to the 'main' package.\n};
135 Mouse::Meta::Role->initialize($caller)->add_method(meta => sub {
136 return Mouse::Meta::Role->initialize(ref($_[0]) || $_[0]);
139 Mouse::Role->export_to_level(1, @_);
150 for my $keyword (@EXPORT) {
152 if(exists $is_removable{$keyword}
153 && ($code = $caller->can($keyword))
154 && (Mouse::Util::get_code_info($code))[0] eq __PACKAGE__){
156 delete $stash->{$keyword};
168 Mouse::Role - define a role in Mouse
172 =head2 meta -> Mouse::Meta::Role
174 Returns this role's metaclass instance.
176 =head2 before (method|methods) => Code
178 Sets up a "before" method modifier. See L<Moose/before> or
179 L<Class::Method::Modifiers/before>.
181 =head2 after (method|methods) => Code
183 Sets up an "after" method modifier. See L<Moose/after> or
184 L<Class::Method::Modifiers/after>.
186 =head2 around (method|methods) => Code
188 Sets up an "around" method modifier. See L<Moose/around> or
189 L<Class::Method::Modifiers/around>.
195 Sets up the "super" keyword. See L<Moose/super>.
197 =item B<override ($name, &sub)>
199 Sets up an "override" method modifier. See L<Moose/Role/override>.
203 This is not supported and emits an error. See L<Moose/Role>.
205 =item B<augment ($name, &sub)>
207 This is not supported and emits an error. See L<Moose/Role>.
211 =head2 has (name|names) => parameters
213 Sets up an attribute (or if passed an arrayref of names, multiple attributes) to
214 this role. See L<Mouse/has>.
216 =head2 confess error -> BOOM
218 L<Carp/confess> for your convenience.
220 =head2 blessed value -> ClassName | undef
222 L<Scalar::Util/blessed> for your convenience.
228 Importing Mouse::Role will give you sugar.
232 Please unimport Mouse (C<no Mouse::Role>) so that if someone calls one of the
233 keywords (such as L</has>) it will break loudly instead breaking subtly.