Commit | Line | Data |
d245e471 |
1 | package Moo::Role; |
2 | |
3 | use strictures 1; |
4 | use Moo::_Utils; |
5 | use base qw(Role::Tiny); |
6 | |
a047096b |
7 | require Moo::sification; |
8 | |
d245e471 |
9 | BEGIN { *INFO = \%Role::Tiny::INFO } |
10 | |
11 | our %INFO; |
12 | |
13 | sub import { |
14 | my $target = caller; |
15 | strictures->import; |
1ba11455 |
16 | return if $INFO{$target}; # already exported into this package |
d245e471 |
17 | # get symbol table reference |
18 | my $stash = do { no strict 'refs'; \%{"${target}::"} }; |
167455a0 |
19 | _install_coderef "${target}::has" => "Moo::Role::has" => sub { |
d245e471 |
20 | my ($name, %spec) = @_; |
21 | ($INFO{$target}{accessor_maker} ||= do { |
faa9ce11 |
22 | require Method::Generate::Accessor; |
d245e471 |
23 | Method::Generate::Accessor->new |
24 | })->generate_method($target, $name, \%spec); |
57d402ef |
25 | push @{$INFO{$target}{attributes}||=[]}, $name, \%spec; |
d245e471 |
26 | }; |
7f9775b1 |
27 | if ($INC{'Moo/HandleMoose.pm'}) { |
28 | Moo::HandleMoose::inject_fake_metaclass_for($target); |
29 | } |
d245e471 |
30 | goto &Role::Tiny::import; |
31 | } |
32 | |
a84066c7 |
33 | sub _inhale_if_moose { |
34 | my ($self, $role) = @_; |
35 | _load_module($role); |
36 | if (!$INFO{$role} and $INC{"Moose.pm"}) { |
37 | if (my $meta = Class::MOP::class_of($role)) { |
38 | $INFO{$role}{methods} = { |
a3411285 |
39 | map +($_ => $role->can($_)), |
40 | grep !$meta->get_method($_)->isa('Class::MOP::Method::Meta'), |
41 | $meta->get_method_list |
a84066c7 |
42 | }; |
43 | $Role::Tiny::APPLIED_TO{$role} = { |
44 | map +($_->name => 1), $meta->calculate_all_roles |
45 | }; |
46 | $INFO{$role}{requires} = [ $meta->get_required_method_list ]; |
57d402ef |
47 | $INFO{$role}{attributes} = [ |
a84066c7 |
48 | map +($_ => $meta->get_attribute($_)), $meta->get_attribute_list |
57d402ef |
49 | ]; |
a84066c7 |
50 | my $mods = $INFO{$role}{modifiers} = []; |
51 | foreach my $type (qw(before after around)) { |
52 | my $map = $meta->${\"get_${type}_method_modifiers_map"}; |
53 | foreach my $method (keys %$map) { |
54 | foreach my $mod (@{$map->{$method}}) { |
55 | push @$mods, [ $type => $method => $mod ]; |
56 | } |
57 | } |
58 | } |
59 | require Class::Method::Modifiers if @$mods; |
60 | $INFO{$role}{inhaled_from_moose} = 1; |
61 | } |
62 | } |
63 | } |
64 | |
a41e15c3 |
65 | sub _maybe_make_accessors { |
66 | my ($self, $role, $target) = @_; |
67 | my $m; |
68 | if ($INFO{$role}{inhaled_from_moose} |
69 | or $m = Moo->_accessor_maker_for($target) |
70 | and ref($m) ne 'Method::Generate::Accessor') { |
71 | $self->_make_accessors($role, $target); |
72 | } |
73 | } |
74 | |
a84066c7 |
75 | sub _make_accessors_if_moose { |
76 | my ($self, $role, $target) = @_; |
77 | if ($INFO{$role}{inhaled_from_moose}) { |
a41e15c3 |
78 | $self->_make_accessors($role, $target); |
79 | } |
80 | } |
81 | |
82 | sub _make_accessors { |
83 | my ($self, $role, $target) = @_; |
84 | my $acc_gen = ($Moo::MAKERS{$target}{accessor} ||= do { |
85 | require Method::Generate::Accessor; |
86 | Method::Generate::Accessor->new |
87 | }); |
db10ae2d |
88 | my $con_gen = $Moo::MAKERS{$target}{constructor}; |
a41e15c3 |
89 | my @attrs = @{$INFO{$role}{attributes}||[]}; |
90 | while (my ($name, $spec) = splice @attrs, 0, 2) { |
db10ae2d |
91 | # needed to ensure we got an index for an arrayref based generator |
92 | if ($con_gen) { |
93 | $spec = $con_gen->all_attribute_specs->{$name}; |
94 | } |
a41e15c3 |
95 | $acc_gen->generate_method($target, $name, $spec); |
a84066c7 |
96 | } |
97 | } |
98 | |
4a79464d |
99 | sub apply_roles_to_package { |
100 | my ($me, $to, @roles) = @_; |
101 | $me->_inhale_if_moose($_) for @roles; |
102 | $me->SUPER::apply_roles_to_package($to, @roles); |
103 | } |
104 | |
6893ea30 |
105 | sub apply_single_role_to_package { |
369a4c50 |
106 | my ($me, $to, $role) = @_; |
a84066c7 |
107 | $me->_inhale_if_moose($role); |
d245e471 |
108 | $me->_handle_constructor($to, $INFO{$role}{attributes}); |
a41e15c3 |
109 | $me->_maybe_make_accessors($role, $to); |
110 | $me->SUPER::apply_single_role_to_package($to, $role); |
d245e471 |
111 | } |
112 | |
113 | sub create_class_with_roles { |
114 | my ($me, $superclass, @roles) = @_; |
115 | |
c69190f1 |
116 | my $new_name = join( |
117 | '__WITH__', $superclass, my $compose_name = join '__AND__', @roles |
118 | ); |
119 | |
d245e471 |
120 | return $new_name if $Role::Tiny::COMPOSED{class}{$new_name}; |
121 | |
a84066c7 |
122 | $me->_inhale_if_moose($_) for @roles; |
123 | |
64284a1b |
124 | my $m; |
125 | if ($m = Moo->_accessor_maker_for($superclass) |
126 | and ref($m) ne 'Method::Generate::Accessor') { |
127 | # old fashioned way time. |
128 | *{_getglob("${new_name}::ISA")} = [ $superclass ]; |
129 | $me->apply_roles_to_package($new_name, @roles); |
130 | return $new_name; |
131 | } |
132 | |
faa9ce11 |
133 | require Sub::Quote; |
d245e471 |
134 | |
135 | $me->SUPER::create_class_with_roles($superclass, @roles); |
136 | |
137 | foreach my $role (@roles) { |
138 | die "${role} is not a Role::Tiny" unless my $info = $INFO{$role}; |
139 | } |
140 | |
c69190f1 |
141 | $Moo::MAKERS{$new_name} = {}; |
142 | |
d245e471 |
143 | $me->_handle_constructor( |
873df570 |
144 | $new_name, [ map @{$INFO{$_}{attributes}||[]}, @roles ], $superclass |
d245e471 |
145 | ); |
146 | |
147 | return $new_name; |
148 | } |
149 | |
a84066c7 |
150 | sub _composable_package_for { |
151 | my ($self, $role) = @_; |
152 | my $composed_name = 'Role::Tiny::_COMPOSABLE::'.$role; |
153 | return $composed_name if $Role::Tiny::COMPOSED{role}{$composed_name}; |
154 | $self->_make_accessors_if_moose($role, $composed_name); |
155 | $self->SUPER::_composable_package_for($role); |
156 | } |
157 | |
dccea57d |
158 | sub _install_single_modifier { |
159 | my ($me, @args) = @_; |
160 | _install_modifier(@args); |
d245e471 |
161 | } |
162 | |
163 | sub _handle_constructor { |
c4570291 |
164 | my ($me, $to, $attr_info, $superclass) = @_; |
57d402ef |
165 | return unless $attr_info && @$attr_info; |
d245e471 |
166 | if ($INFO{$to}) { |
57d402ef |
167 | push @{$INFO{$to}{attributes}||=[]}, @$attr_info; |
d245e471 |
168 | } else { |
169 | # only fiddle with the constructor if the target is a Moo class |
170 | if ($INC{"Moo.pm"} |
c4570291 |
171 | and my $con = Moo->_constructor_maker_for($to, $superclass)) { |
a41e15c3 |
172 | # shallow copy of the specs since the constructor will assign an index |
57d402ef |
173 | $con->register_attribute_specs(map ref() ? { %$_ } : $_, @$attr_info); |
d245e471 |
174 | } |
175 | } |
176 | } |
177 | |
178 | 1; |
bce933ec |
179 | |
0b6e5fff |
180 | =head1 NAME |
181 | |
182 | Moo::Role - Minimal Object Orientation support for Roles |
bce933ec |
183 | |
184 | =head1 SYNOPSIS |
185 | |
186 | package My::Role; |
187 | |
188 | use Moo::Role; |
189 | |
190 | sub foo { ... } |
191 | |
192 | sub bar { ... } |
193 | |
194 | has baz => ( |
195 | is => 'ro', |
196 | ); |
197 | |
198 | 1; |
199 | |
200 | else where |
201 | |
202 | package Some::Class; |
203 | |
204 | use Moo; |
205 | |
206 | # bar gets imported, but not foo |
207 | with('My::Role'); |
208 | |
209 | sub foo { ... } |
210 | |
211 | 1; |
212 | |
213 | =head1 DESCRIPTION |
214 | |
215 | C<Moo::Role> builds upon L<Role::Tiny>, so look there for most of the |
216 | documentation on how this works. The main addition here is extra bits to make |
217 | the roles more "Moosey;" which is to say, it adds L</has>. |
218 | |
219 | =head1 IMPORTED SUBROUTINES |
220 | |
221 | See L<Role::Tiny/IMPORTED SUBROUTINES> for all the other subroutines that are |
222 | imported by this module. |
223 | |
224 | =head2 has |
225 | |
226 | has attr => ( |
227 | is => 'ro', |
228 | ); |
229 | |
230 | Declares an attribute for the class to be composed into. See |
231 | L<Moo/has> for all options. |
40f3e3aa |
232 | |
233 | =head1 AUTHORS |
234 | |
235 | See L<Moo> for authors. |
236 | |
237 | =head1 COPYRIGHT AND LICENSE |
238 | |
239 | See L<Moo> for the copyright and license. |
240 | |
241 | =cut |