5 use base qw(Role::Tiny);
7 require Moo::sification;
9 BEGIN { *INFO = \%Role::Tiny::INFO }
17 return if $INFO{$target}; # already exported into this package
18 # get symbol table reference
19 my $stash = do { no strict 'refs'; \%{"${target}::"} };
20 _install_coderef "${target}::has" => "Moo::Role::has" => sub {
21 my ($name, %spec) = @_;
22 ($INFO{$target}{accessor_maker} ||= do {
23 require Method::Generate::Accessor;
24 Method::Generate::Accessor->new
25 })->generate_method($target, $name, \%spec);
26 push @{$INFO{$target}{attributes}||=[]}, $name, \%spec;
27 $me->_maybe_reset_handlemoose($target);
29 # install before/after/around subs
30 foreach my $type (qw(before after around)) {
31 *{_getglob "${target}::${type}"} = sub {
32 require Class::Method::Modifiers;
33 push @{$INFO{$target}{modifiers}||=[]}, [ $type => @_ ];
34 $me->_maybe_reset_handlemoose($target);
37 *{_getglob "${target}::requires"} = sub {
38 push @{$INFO{$target}{requires}||=[]}, @_;
39 $me->_maybe_reset_handlemoose($target);
41 *{_getglob "${target}::with"} = sub {
42 $me->apply_roles_to_package($target, @_);
43 $me->_maybe_reset_handlemoose($target);
45 # grab all *non-constant* (stash slot is not a scalarref) subs present
46 # in the symbol table and store their refaddrs (no need to forcibly
47 # inflate constant subs into real subs) - also add '' to here (this
48 # is used later) with a map to the coderefs in case of copying or re-use
49 my @not_methods = ('', map { *$_{CODE}||() } grep !ref($_), values %$stash);
50 @{$INFO{$target}{not_methods}={}}{@not_methods} = @not_methods;
52 $Role::Tiny::APPLIED_TO{$target} = { $target => undef };
54 if ($INC{'Moo/HandleMoose.pm'}) {
55 Moo::HandleMoose::inject_fake_metaclass_for($target);
59 sub _maybe_reset_handlemoose {
60 my ($class, $target) = @_;
61 if ($INC{"Moo/HandleMoose.pm"}) {
62 Moo::HandleMoose::maybe_reinject_fake_metaclass_for($target);
66 sub _inhale_if_moose {
67 my ($self, $role) = @_;
69 if (!$INFO{$role} and $INC{"Moose.pm"}) {
70 if (my $meta = Class::MOP::class_of($role)) {
71 $INFO{$role}{methods} = {
72 map +($_ => $role->can($_)),
73 grep !$meta->get_method($_)->isa('Class::MOP::Method::Meta'),
74 $meta->get_method_list
76 $Role::Tiny::APPLIED_TO{$role} = {
77 map +($_->name => 1), $meta->calculate_all_roles
79 $INFO{$role}{requires} = [ $meta->get_required_method_list ];
80 $INFO{$role}{attributes} = [
81 map +($_ => $meta->get_attribute($_)), $meta->get_attribute_list
83 my $mods = $INFO{$role}{modifiers} = [];
84 foreach my $type (qw(before after around)) {
85 my $map = $meta->${\"get_${type}_method_modifiers_map"};
86 foreach my $method (keys %$map) {
87 foreach my $mod (@{$map->{$method}}) {
88 push @$mods, [ $type => $method => $mod ];
92 require Class::Method::Modifiers if @$mods;
93 $INFO{$role}{inhaled_from_moose} = 1;
98 sub _maybe_make_accessors {
99 my ($self, $role, $target) = @_;
101 if ($INFO{$role}{inhaled_from_moose}
103 and $m = Moo->_accessor_maker_for($target)
104 and ref($m) ne 'Method::Generate::Accessor') {
105 $self->_make_accessors($role, $target);
109 sub _make_accessors_if_moose {
110 my ($self, $role, $target) = @_;
111 if ($INFO{$role}{inhaled_from_moose}) {
112 $self->_make_accessors($role, $target);
116 sub _make_accessors {
117 my ($self, $role, $target) = @_;
118 my $acc_gen = ($Moo::MAKERS{$target}{accessor} ||= do {
119 require Method::Generate::Accessor;
120 Method::Generate::Accessor->new
122 my $con_gen = $Moo::MAKERS{$target}{constructor};
123 my @attrs = @{$INFO{$role}{attributes}||[]};
124 while (my ($name, $spec) = splice @attrs, 0, 2) {
125 # needed to ensure we got an index for an arrayref based generator
127 $spec = $con_gen->all_attribute_specs->{$name};
129 $acc_gen->generate_method($target, $name, $spec);
133 sub apply_roles_to_package {
134 my ($me, $to, @roles) = @_;
135 $me->_inhale_if_moose($_) for @roles;
136 $me->SUPER::apply_roles_to_package($to, @roles);
139 sub apply_single_role_to_package {
140 my ($me, $to, $role) = @_;
141 $me->_inhale_if_moose($role);
142 $me->_handle_constructor($to, $INFO{$role}{attributes});
143 $me->_maybe_make_accessors($role, $to);
144 $me->SUPER::apply_single_role_to_package($to, $role);
147 sub create_class_with_roles {
148 my ($me, $superclass, @roles) = @_;
151 '__WITH__', $superclass, my $compose_name = join '__AND__', @roles
154 return $new_name if $Role::Tiny::COMPOSED{class}{$new_name};
156 $me->_inhale_if_moose($_) for @roles;
160 and $m = Moo->_accessor_maker_for($superclass)
161 and ref($m) ne 'Method::Generate::Accessor') {
162 # old fashioned way time.
163 *{_getglob("${new_name}::ISA")} = [ $superclass ];
164 $me->apply_roles_to_package($new_name, @roles);
170 $me->SUPER::create_class_with_roles($superclass, @roles);
172 foreach my $role (@roles) {
173 die "${role} is not a Role::Tiny" unless my $info = $INFO{$role};
176 $Moo::MAKERS{$new_name} = {};
178 $me->_handle_constructor(
179 $new_name, [ map @{$INFO{$_}{attributes}||[]}, @roles ], $superclass
185 sub _composable_package_for {
186 my ($self, $role) = @_;
187 my $composed_name = 'Role::Tiny::_COMPOSABLE::'.$role;
188 return $composed_name if $Role::Tiny::COMPOSED{role}{$composed_name};
189 $self->_make_accessors_if_moose($role, $composed_name);
190 $self->SUPER::_composable_package_for($role);
193 sub _install_single_modifier {
194 my ($me, @args) = @_;
195 _install_modifier(@args);
198 sub _handle_constructor {
199 my ($me, $to, $attr_info, $superclass) = @_;
200 return unless $attr_info && @$attr_info;
202 push @{$INFO{$to}{attributes}||=[]}, @$attr_info;
204 # only fiddle with the constructor if the target is a Moo class
206 and my $con = Moo->_constructor_maker_for($to, $superclass)) {
207 # shallow copy of the specs since the constructor will assign an index
208 $con->register_attribute_specs(map ref() ? { %$_ } : $_, @$attr_info);
217 Moo::Role - Minimal Object Orientation support for Roles
241 # bar gets imported, but not foo
250 C<Moo::Role> builds upon L<Role::Tiny>, so look there for most of the
251 documentation on how this works. The main addition here is extra bits to make
252 the roles more "Moosey;" which is to say, it adds L</has>.
254 =head1 IMPORTED SUBROUTINES
256 See L<Role::Tiny/IMPORTED SUBROUTINES> for all the other subroutines that are
257 imported by this module.
265 Declares an attribute for the class to be composed into. See
266 L<Moo/has> for all options.
270 See L<Moo> for authors.
272 =head1 COPYRIGHT AND LICENSE
274 See L<Moo> for the copyright and license.