Commit | Line | Data |
c0e30cf5 |
1 | |
2 | package Moose::Meta::Class; |
3 | |
4 | use strict; |
5 | use warnings; |
6 | |
0addec44 |
7 | use Class::MOP; |
648e79ae |
8 | |
590e8894 |
9 | use Carp qw( confess ); |
2e7f6cf4 |
10 | use Data::OptList; |
f8b6827f |
11 | use List::Util qw( first ); |
349cda54 |
12 | use List::MoreUtils qw( any all uniq first_index ); |
0db1c8dc |
13 | use Scalar::Util 'blessed'; |
a15dff8d |
14 | |
74862722 |
15 | use Moose::Meta::Method::Overridden; |
3f9e4b0a |
16 | use Moose::Meta::Method::Augmented; |
77f14411 |
17 | use Moose::Error::Default; |
0fa70d03 |
18 | use Moose::Meta::Class::Immutable::Trait; |
19 | use Moose::Meta::Method::Constructor; |
20 | use Moose::Meta::Method::Destructor; |
699a2e32 |
21 | use Moose::Meta::Method::Meta; |
61907a02 |
22 | use Moose::Util; |
d2782813 |
23 | use Class::MOP::MiniTrait; |
8ee73eeb |
24 | |
c0e30cf5 |
25 | use base 'Class::MOP::Class'; |
26 | |
d2782813 |
27 | Class::MOP::MiniTrait::apply(__PACKAGE__, 'Moose::Meta::Object::Trait'); |
28 | |
598340d5 |
29 | __PACKAGE__->meta->add_attribute('roles' => ( |
ef333f17 |
30 | reader => 'roles', |
31 | default => sub { [] } |
32 | )); |
33 | |
a9b63d79 |
34 | __PACKAGE__->meta->add_attribute('role_applications' => ( |
639f9a1a |
35 | reader => '_get_role_applications', |
a9b63d79 |
36 | default => sub { [] } |
37 | )); |
38 | |
0fa70d03 |
39 | __PACKAGE__->meta->add_attribute( |
40 | Class::MOP::Attribute->new('immutable_trait' => ( |
41 | accessor => "immutable_trait", |
42 | default => 'Moose::Meta::Class::Immutable::Trait', |
43 | )) |
44 | ); |
45 | |
e606ae5f |
46 | __PACKAGE__->meta->add_attribute('constructor_class' => ( |
47 | accessor => 'constructor_class', |
e0001338 |
48 | default => 'Moose::Meta::Method::Constructor', |
e606ae5f |
49 | )); |
50 | |
51 | __PACKAGE__->meta->add_attribute('destructor_class' => ( |
52 | accessor => 'destructor_class', |
e0001338 |
53 | default => 'Moose::Meta::Method::Destructor', |
e606ae5f |
54 | )); |
55 | |
11c86f15 |
56 | __PACKAGE__->meta->add_attribute('error_class' => ( |
bf6fa6b3 |
57 | accessor => 'error_class', |
58 | default => 'Moose::Error::Default', |
11c86f15 |
59 | )); |
60 | |
590868a3 |
61 | sub initialize { |
62 | my $class = shift; |
0db1c8dc |
63 | my @args = @_; |
64 | unshift @args, 'package' if @args % 2; |
65 | my %opts = @args; |
66 | my $package = delete $opts{package}; |
67 | return Class::MOP::get_metaclass_by_name($package) |
68 | || $class->SUPER::initialize($package, |
685f7e44 |
69 | 'attribute_metaclass' => 'Moose::Meta::Attribute', |
70 | 'method_metaclass' => 'Moose::Meta::Method', |
71 | 'instance_metaclass' => 'Moose::Meta::Instance', |
0db1c8dc |
72 | %opts, |
d03bd989 |
73 | ); |
ac2dc464 |
74 | } |
590868a3 |
75 | |
61bdd94f |
76 | sub create { |
0db1c8dc |
77 | my $class = shift; |
78 | my @args = @_; |
79 | |
80 | unshift @args, 'package' if @args % 2 == 1; |
81 | my %options = @args; |
d03bd989 |
82 | |
61bdd94f |
83 | (ref $options{roles} eq 'ARRAY') |
7d4035ae |
84 | || $class->throw_error("You must pass an ARRAY ref of roles", data => $options{roles}) |
61bdd94f |
85 | if exists $options{roles}; |
dd37a5be |
86 | |
0db1c8dc |
87 | my $package = delete $options{package}; |
88 | my $roles = delete $options{roles}; |
89 | |
90 | my $new_meta = $class->SUPER::create($package, %options); |
dd37a5be |
91 | |
310ba883 |
92 | if ($roles) { |
7d4035ae |
93 | Moose::Util::apply_all_roles( $new_meta, @$roles ); |
61bdd94f |
94 | } |
d03bd989 |
95 | |
7d4035ae |
96 | return $new_meta; |
61bdd94f |
97 | } |
98 | |
699a2e32 |
99 | sub _meta_method_class { 'Moose::Meta::Method::Meta' } |
100 | |
0db1c8dc |
101 | sub _anon_package_prefix { 'Moose::Meta::Class::__ANON__::SERIAL::' } |
102 | |
cf600c83 |
103 | sub _anon_cache_key { |
0db1c8dc |
104 | my $class = shift; |
105 | my %options = @_; |
83dcb866 |
106 | |
107 | my $superclass_key = join('|', |
108 | map { $_->[0] } @{ Data::OptList::mkopt($options{superclasses} || []) } |
cf600c83 |
109 | ); |
83dcb866 |
110 | |
111 | my $roles = Data::OptList::mkopt(($options{roles} || []), { |
112 | moniker => 'role', |
113 | val_test => sub { ref($_[0]) eq 'HASH' }, |
114 | }); |
115 | |
116 | my @role_keys; |
117 | for my $role_spec (@$roles) { |
118 | my ($role, $params) = @$role_spec; |
119 | $params = { %$params } if $params; |
120 | |
121 | my $key = blessed($role) ? $role->name : $role; |
122 | |
123 | if ($params && %$params) { |
124 | my $alias = delete $params->{'-alias'} |
125 | || delete $params->{'alias'} |
126 | || {}; |
127 | my $excludes = delete $params->{'-excludes'} |
128 | || delete $params->{'excludes'} |
129 | || []; |
130 | $excludes = [$excludes] unless ref($excludes) eq 'ARRAY'; |
131 | |
132 | if (%$params) { |
133 | warn "Roles with parameters cannot be cached. Consider " |
134 | . "applying the parameters before calling " |
135 | . "create_anon_class, or using 'weaken => 0' instead"; |
136 | return; |
137 | } |
138 | |
6b8422d6 |
139 | my $alias_key = join('%', |
140 | map { $_ => $alias->{$_} } sort keys %$alias |
141 | ); |
142 | my $excludes_key = join('%', |
143 | sort @$excludes |
144 | ); |
145 | $key .= '<' . join('+', 'a', $alias_key, 'e', $excludes_key) . '>'; |
83dcb866 |
146 | } |
147 | |
148 | push @role_keys, $key; |
149 | } |
150 | |
bf9c6a45 |
151 | my $role_key = join('|', sort @role_keys); |
83dcb866 |
152 | |
153 | # Makes something like Super::Class|Super::Class::2=Role|Role::1 |
154 | return join('=', $superclass_key, $role_key); |
cf600c83 |
155 | } |
156 | |
157 | sub reinitialize { |
158 | my $self = shift; |
159 | my $pkg = shift; |
160 | |
161 | my $meta = blessed $pkg ? $pkg : Class::MOP::class_of($pkg); |
162 | |
cf600c83 |
163 | my %existing_classes; |
164 | if ($meta) { |
165 | %existing_classes = map { $_ => $meta->$_() } qw( |
166 | attribute_metaclass |
167 | method_metaclass |
168 | wrapped_method_metaclass |
169 | instance_metaclass |
170 | constructor_class |
171 | destructor_class |
172 | error_class |
173 | ); |
cf600c83 |
174 | } |
175 | |
0db1c8dc |
176 | return $self->SUPER::reinitialize( |
cf600c83 |
177 | $pkg, |
178 | %existing_classes, |
179 | @_, |
180 | ); |
cf600c83 |
181 | } |
182 | |
ef333f17 |
183 | sub add_role { |
184 | my ($self, $role) = @_; |
185 | (blessed($role) && $role->isa('Moose::Meta::Role')) |
11c86f15 |
186 | || $self->throw_error("Roles must be instances of Moose::Meta::Role", data => $role); |
ef333f17 |
187 | push @{$self->roles} => $role; |
188 | } |
189 | |
639f9a1a |
190 | sub role_applications { |
191 | my ($self) = @_; |
192 | |
193 | return @{$self->_get_role_applications}; |
194 | } |
195 | |
a9b63d79 |
196 | sub add_role_application { |
197 | my ($self, $application) = @_; |
198 | (blessed($application) && $application->isa('Moose::Meta::Role::Application::ToClass')) |
199 | || $self->throw_error("Role applications must be instances of Moose::Meta::Role::Application::ToClass", data => $application); |
639f9a1a |
200 | push @{$self->_get_role_applications} => $application; |
a9b63d79 |
201 | } |
202 | |
b8aeb4dc |
203 | sub calculate_all_roles { |
204 | my $self = shift; |
205 | my %seen; |
206 | grep { !$seen{$_->name}++ } map { $_->calculate_all_roles } @{ $self->roles }; |
207 | } |
208 | |
9f83eb5d |
209 | sub calculate_all_roles_with_inheritance { |
210 | my $self = shift; |
211 | my %seen; |
212 | grep { !$seen{$_->name}++ } |
213 | map { Class::MOP::class_of($_)->can('calculate_all_roles') |
214 | ? Class::MOP::class_of($_)->calculate_all_roles |
215 | : () } |
216 | $self->linearized_isa; |
217 | } |
218 | |
ef333f17 |
219 | sub does_role { |
220 | my ($self, $role_name) = @_; |
322abb07 |
221 | |
ef333f17 |
222 | (defined $role_name) |
11c86f15 |
223 | || $self->throw_error("You must supply a role name to look for"); |
322abb07 |
224 | |
9c429218 |
225 | foreach my $class ($self->class_precedence_list) { |
322abb07 |
226 | my $meta = Class::MOP::class_of($class); |
3d0f5a27 |
227 | # when a Moose metaclass is itself extended with a role, |
228 | # this check needs to be done since some items in the |
229 | # class_precedence_list might in fact be Class::MOP |
230 | # based still. |
322abb07 |
231 | next unless $meta && $meta->can('roles'); |
232 | foreach my $role (@{$meta->roles}) { |
9c429218 |
233 | return 1 if $role->does_role($role_name); |
234 | } |
ef333f17 |
235 | } |
236 | return 0; |
237 | } |
238 | |
d79e62fd |
239 | sub excludes_role { |
240 | my ($self, $role_name) = @_; |
ebfc4d0f |
241 | |
d79e62fd |
242 | (defined $role_name) |
11c86f15 |
243 | || $self->throw_error("You must supply a role name to look for"); |
ebfc4d0f |
244 | |
ac2dc464 |
245 | foreach my $class ($self->class_precedence_list) { |
ebfc4d0f |
246 | my $meta = Class::MOP::class_of($class); |
247 | # when a Moose metaclass is itself extended with a role, |
248 | # this check needs to be done since some items in the |
249 | # class_precedence_list might in fact be Class::MOP |
250 | # based still. |
251 | next unless $meta && $meta->can('roles'); |
252 | foreach my $role (@{$meta->roles}) { |
9c429218 |
253 | return 1 if $role->excludes_role($role_name); |
254 | } |
d79e62fd |
255 | } |
256 | return 0; |
257 | } |
258 | |
8c9d74e7 |
259 | sub new_object { |
7d4035ae |
260 | my $self = shift; |
e606ae5f |
261 | my $params = @_ == 1 ? $_[0] : {@_}; |
7d4035ae |
262 | my $object = $self->SUPER::new_object($params); |
1308deb4 |
263 | |
7d4035ae |
264 | foreach my $attr ( $self->get_all_attributes() ) { |
1308deb4 |
265 | |
266 | next unless $attr->can('has_trigger') && $attr->has_trigger; |
267 | |
268 | my $init_arg = $attr->init_arg; |
269 | |
270 | next unless defined $init_arg; |
271 | |
272 | next unless exists $params->{$init_arg}; |
273 | |
274 | $attr->trigger->( |
7d4035ae |
275 | $object, |
1308deb4 |
276 | ( |
277 | $attr->should_coerce |
7d4035ae |
278 | ? $attr->get_read_method_ref->($object) |
1308deb4 |
279 | : $params->{$init_arg} |
280 | ), |
1308deb4 |
281 | ); |
8c9d74e7 |
282 | } |
1308deb4 |
283 | |
7d4035ae |
284 | $object->BUILDALL($params) if $object->can('BUILDALL'); |
a19ae3d7 |
285 | |
7d4035ae |
286 | return $object; |
8c9d74e7 |
287 | } |
288 | |
e3225a0f |
289 | sub _generate_fallback_constructor { |
290 | my $self = shift; |
291 | my ($class) = @_; |
292 | return $class . '->Moose::Object::new(@_)' |
293 | } |
294 | |
295 | sub _inline_params { |
296 | my $self = shift; |
297 | my ($params, $class) = @_; |
298 | return ( |
299 | 'my ' . $params . ' = ', |
300 | $self->_inline_BUILDARGS($class, '@_'), |
301 | ';', |
302 | ); |
303 | } |
304 | |
305 | sub _inline_BUILDARGS { |
306 | my $self = shift; |
307 | my ($class, $args) = @_; |
308 | |
309 | my $buildargs = $self->find_method_by_name("BUILDARGS"); |
310 | |
311 | if ($args eq '@_' |
312 | && (!$buildargs or $buildargs->body == \&Moose::Object::BUILDARGS)) { |
313 | return ( |
314 | 'do {', |
315 | 'my $params;', |
316 | 'if (scalar @_ == 1) {', |
317 | 'if (!defined($_[0]) || ref($_[0]) ne \'HASH\') {', |
318 | $self->_inline_throw_error( |
319 | '"Single parameters to new() must be a HASH ref"', |
320 | 'data => $_[0]', |
321 | ) . ';', |
322 | '}', |
323 | '$params = { %{ $_[0] } };', |
324 | '}', |
325 | 'elsif (@_ % 2) {', |
326 | 'Carp::carp(', |
327 | '"The new() method for ' . $class . ' expects a ' |
328 | . 'hash reference or a key/value list. You passed an ' |
329 | . 'odd number of arguments"', |
330 | ');', |
331 | '$params = {@_, undef};', |
332 | '}', |
333 | 'else {', |
334 | '$params = {@_};', |
335 | '}', |
336 | '$params;', |
337 | '}', |
338 | ); |
339 | } |
340 | else { |
341 | return $class . '->BUILDARGS(' . $args . ')'; |
342 | } |
343 | } |
344 | |
345 | sub _inline_slot_initializer { |
346 | my $self = shift; |
ec86bdff |
347 | my ($attr, $idx) = @_; |
e3225a0f |
348 | |
ec86bdff |
349 | return ( |
350 | '## ' . $attr->name, |
351 | $self->_inline_check_required_attr($attr), |
352 | $self->SUPER::_inline_slot_initializer(@_), |
353 | ); |
e3225a0f |
354 | } |
355 | |
356 | sub _inline_check_required_attr { |
357 | my $self = shift; |
358 | my ($attr) = @_; |
359 | |
360 | return unless defined $attr->init_arg; |
361 | return unless $attr->can('is_required') && $attr->is_required; |
362 | return if $attr->has_default || $attr->has_builder; |
363 | |
364 | return ( |
365 | 'if (!exists $params->{\'' . $attr->init_arg . '\'}) {', |
366 | $self->_inline_throw_error( |
367 | '"Attribute (' . quotemeta($attr->name) . ') is required"' |
368 | ) . ';', |
369 | '}', |
370 | ); |
371 | } |
372 | |
7106ce79 |
373 | # XXX: these two are duplicated from cmop, because we have to pass the tc stuff |
374 | # through to _inline_set_value - this should probably be fixed, but i'm not |
375 | # quite sure how. -doy |
e3225a0f |
376 | sub _inline_init_attr_from_constructor { |
377 | my $self = shift; |
ec86bdff |
378 | my ($attr, $idx) = @_; |
379 | |
380 | my @initial_value = $attr->_inline_set_value( |
381 | '$instance', |
382 | '$params->{\'' . $attr->init_arg . '\'}', |
383 | '$type_constraint_bodies[' . $idx . ']', |
c40e4359 |
384 | '$type_coercions[' . $idx . ']', |
ec86bdff |
385 | '$type_constraints[' . $idx . ']', |
386 | 'for constructor', |
e3225a0f |
387 | ); |
388 | |
ec86bdff |
389 | push @initial_value, ( |
390 | '$attrs->[' . $idx . ']->set_initial_value(', |
391 | '$instance,', |
392 | $attr->_inline_instance_get('$instance'), |
393 | ');', |
394 | ) if $attr->has_initializer; |
e3225a0f |
395 | |
ec86bdff |
396 | return @initial_value; |
e3225a0f |
397 | } |
398 | |
ec86bdff |
399 | sub _inline_init_attr_from_default { |
e3225a0f |
400 | my $self = shift; |
ec86bdff |
401 | my ($attr, $idx) = @_; |
e3225a0f |
402 | |
545c6012 |
403 | return if $attr->can('is_lazy') && $attr->is_lazy; |
ec86bdff |
404 | my $default = $self->_inline_default_value($attr, $idx); |
405 | return unless $default; |
e3225a0f |
406 | |
ec86bdff |
407 | my @initial_value = ( |
408 | 'my $default = ' . $default . ';', |
409 | $attr->_inline_set_value( |
410 | '$instance', |
411 | '$default', |
412 | '$type_constraint_bodies[' . $idx . ']', |
c40e4359 |
413 | '$type_coercions[' . $idx . ']', |
ec86bdff |
414 | '$type_constraints[' . $idx . ']', |
415 | 'for constructor', |
416 | ), |
e3225a0f |
417 | ); |
418 | |
ec86bdff |
419 | push @initial_value, ( |
420 | '$attrs->[' . $idx . ']->set_initial_value(', |
421 | '$instance,', |
422 | $attr->_inline_instance_get('$instance'), |
423 | ');', |
424 | ) if $attr->has_initializer; |
e3225a0f |
425 | |
ec86bdff |
426 | return @initial_value; |
e3225a0f |
427 | } |
428 | |
429 | sub _inline_extra_init { |
430 | my $self = shift; |
431 | return ( |
432 | $self->_inline_triggers, |
433 | $self->_inline_BUILDALL, |
434 | ); |
435 | } |
436 | |
437 | sub _inline_triggers { |
438 | my $self = shift; |
439 | my @trigger_calls; |
440 | |
ec86bdff |
441 | my @attrs = sort { $a->name cmp $b->name } $self->get_all_attributes; |
e3225a0f |
442 | for my $i (0 .. $#attrs) { |
443 | my $attr = $attrs[$i]; |
444 | |
445 | next unless $attr->can('has_trigger') && $attr->has_trigger; |
446 | |
447 | my $init_arg = $attr->init_arg; |
448 | next unless defined $init_arg; |
449 | |
450 | push @trigger_calls, |
451 | 'if (exists $params->{\'' . $init_arg . '\'}) {', |
3eeaf081 |
452 | '$triggers->[' . $i . ']->(', |
e3225a0f |
453 | '$instance,', |
454 | $attr->_inline_instance_get('$instance') . ',', |
455 | ');', |
456 | '}'; |
457 | } |
458 | |
459 | return @trigger_calls; |
460 | } |
461 | |
462 | sub _inline_BUILDALL { |
463 | my $self = shift; |
464 | |
465 | my @methods = reverse $self->find_all_methods_by_name('BUILD'); |
466 | my @BUILD_calls; |
467 | |
468 | foreach my $method (@methods) { |
469 | push @BUILD_calls, |
470 | '$instance->' . $method->{class} . '::BUILD($params);'; |
471 | } |
472 | |
473 | return @BUILD_calls; |
474 | } |
475 | |
e2eef3a5 |
476 | sub superclasses { |
477 | my $self = shift; |
2e7f6cf4 |
478 | my $supers = Data::OptList::mkopt(\@_); |
479 | foreach my $super (@{ $supers }) { |
480 | my ($name, $opts) = @{ $super }; |
481 | Class::MOP::load_class($name, $opts); |
482 | my $meta = Class::MOP::class_of($name); |
483 | $self->throw_error("You cannot inherit from a Moose Role ($name)") |
e2eef3a5 |
484 | if $meta && $meta->isa('Moose::Meta::Role') |
485 | } |
2e7f6cf4 |
486 | return $self->SUPER::superclasses(map { $_->[0] } @{ $supers }); |
e2eef3a5 |
487 | } |
488 | |
093b12c2 |
489 | ### --------------------------------------------- |
490 | |
a2eec5e7 |
491 | sub add_attribute { |
492 | my $self = shift; |
28af3424 |
493 | my $attr = |
e472c9a5 |
494 | (blessed $_[0] && $_[0]->isa('Class::MOP::Attribute') |
d03bd989 |
495 | ? $_[0] |
28af3424 |
496 | : $self->_process_attribute(@_)); |
497 | $self->SUPER::add_attribute($attr); |
498 | # it may be a Class::MOP::Attribute, theoretically, which doesn't have |
499 | # 'bare' and doesn't implement this method |
9340e346 |
500 | if ($attr->can('_check_associated_methods')) { |
501 | $attr->_check_associated_methods; |
28af3424 |
502 | } |
503 | return $attr; |
a2eec5e7 |
504 | } |
505 | |
78cd1d3b |
506 | sub add_override_method_modifier { |
507 | my ($self, $name, $method, $_super_package) = @_; |
18c2ec0e |
508 | |
d05cd563 |
509 | (!$self->has_method($name)) |
11c86f15 |
510 | || $self->throw_error("Cannot add an override method if a local method is already present"); |
18c2ec0e |
511 | |
74862722 |
512 | $self->add_method($name => Moose::Meta::Method::Overridden->new( |
3f9e4b0a |
513 | method => $method, |
514 | class => $self, |
515 | package => $_super_package, # need this for roles |
516 | name => $name, |
18c2ec0e |
517 | )); |
78cd1d3b |
518 | } |
519 | |
520 | sub add_augment_method_modifier { |
ac2dc464 |
521 | my ($self, $name, $method) = @_; |
d05cd563 |
522 | (!$self->has_method($name)) |
11c86f15 |
523 | || $self->throw_error("Cannot add an augment method if a local method is already present"); |
3f9e4b0a |
524 | |
525 | $self->add_method($name => Moose::Meta::Method::Augmented->new( |
526 | method => $method, |
527 | class => $self, |
528 | name => $name, |
529 | )); |
78cd1d3b |
530 | } |
531 | |
1341f10c |
532 | ## Private Utility methods ... |
533 | |
05d9eaf6 |
534 | sub _find_next_method_by_name_which_is_not_overridden { |
535 | my ($self, $name) = @_; |
68efb014 |
536 | foreach my $method ($self->find_all_methods_by_name($name)) { |
ac2dc464 |
537 | return $method->{code} |
74862722 |
538 | if blessed($method->{code}) && !$method->{code}->isa('Moose::Meta::Method::Overridden'); |
05d9eaf6 |
539 | } |
540 | return undef; |
541 | } |
542 | |
f6df97ae |
543 | ## Metaclass compatibility |
f8b6827f |
544 | |
f6df97ae |
545 | sub _base_metaclasses { |
546 | my $self = shift; |
547 | my %metaclasses = $self->SUPER::_base_metaclasses; |
548 | for my $class (keys %metaclasses) { |
549 | $metaclasses{$class} =~ s/^Class::MOP/Moose::Meta/; |
1341f10c |
550 | } |
f6df97ae |
551 | return ( |
552 | %metaclasses, |
553 | error_class => 'Moose::Error::Default', |
f8b6827f |
554 | ); |
f8b6827f |
555 | } |
556 | |
f6df97ae |
557 | sub _fix_class_metaclass_incompatibility { |
558 | my $self = shift; |
559 | my ($super_meta) = @_; |
f8b6827f |
560 | |
f6df97ae |
561 | $self->SUPER::_fix_class_metaclass_incompatibility(@_); |
f8b6827f |
562 | |
88f2e008 |
563 | if ($self->_class_metaclass_can_be_made_compatible($super_meta)) { |
590e8894 |
564 | ($self->is_pristine) |
565 | || confess "Can't fix metaclass incompatibility for " |
566 | . $self->name |
567 | . " because it is not pristine."; |
a907317a |
568 | my $super_meta_name = $super_meta->_real_ref_name; |
61907a02 |
569 | my $class_meta_subclass_meta_name = Moose::Util::_reconcile_roles_for_metaclass(blessed($self), $super_meta_name); |
8450b001 |
570 | my $new_self = $class_meta_subclass_meta_name->reinitialize( |
cf7febc7 |
571 | $self->name, |
572 | ); |
6a52b083 |
573 | |
8450b001 |
574 | $self->_replace_self( $new_self, $class_meta_subclass_meta_name ); |
f8b6827f |
575 | } |
f6df97ae |
576 | } |
f8b6827f |
577 | |
f6df97ae |
578 | sub _fix_single_metaclass_incompatibility { |
579 | my $self = shift; |
580 | my ($metaclass_type, $super_meta) = @_; |
f8b6827f |
581 | |
f6df97ae |
582 | $self->SUPER::_fix_single_metaclass_incompatibility(@_); |
f8b6827f |
583 | |
88f2e008 |
584 | if ($self->_single_metaclass_can_be_made_compatible($super_meta, $metaclass_type)) { |
590e8894 |
585 | ($self->is_pristine) |
586 | || confess "Can't fix metaclass incompatibility for " |
587 | . $self->name |
588 | . " because it is not pristine."; |
7f6c8567 |
589 | my $super_meta_name = $super_meta->_real_ref_name; |
61907a02 |
590 | my $class_specific_meta_subclass_meta_name = Moose::Util::_reconcile_roles_for_metaclass($self->$metaclass_type, $super_meta->$metaclass_type); |
cf7febc7 |
591 | my $new_self = $super_meta->reinitialize( |
592 | $self->name, |
8450b001 |
593 | $metaclass_type => $class_specific_meta_subclass_meta_name, |
cf7febc7 |
594 | ); |
6a52b083 |
595 | |
7f6c8567 |
596 | $self->_replace_self( $new_self, $super_meta_name ); |
f6df97ae |
597 | } |
f8b6827f |
598 | } |
599 | |
6a52b083 |
600 | sub _replace_self { |
601 | my $self = shift; |
602 | my ( $new_self, $new_class) = @_; |
603 | |
604 | %$self = %$new_self; |
605 | bless $self, $new_class; |
606 | |
607 | # We need to replace the cached metaclass instance or else when it goes |
608 | # out of scope Class::MOP::Class destroy's the namespace for the |
609 | # metaclass's class, causing much havoc. |
dcc8dc06 |
610 | my $weaken = Class::MOP::metaclass_is_weak( $self->name ); |
6a52b083 |
611 | Class::MOP::store_metaclass_by_name( $self->name, $self ); |
dcc8dc06 |
612 | Class::MOP::weaken_metaclass( $self->name ) if $weaken; |
6a52b083 |
613 | } |
614 | |
1341f10c |
615 | sub _process_attribute { |
a3738e5b |
616 | my ( $self, $name, @args ) = @_; |
7e59b803 |
617 | |
618 | @args = %{$args[0]} if scalar @args == 1 && ref($args[0]) eq 'HASH'; |
d9bb6c63 |
619 | |
f9b5f5f8 |
620 | if (($name || '') =~ /^\+(.*)/) { |
7e59b803 |
621 | return $self->_process_inherited_attribute($1, @args); |
1341f10c |
622 | } |
623 | else { |
7e59b803 |
624 | return $self->_process_new_attribute($name, @args); |
625 | } |
626 | } |
627 | |
628 | sub _process_new_attribute { |
629 | my ( $self, $name, @args ) = @_; |
7e59b803 |
630 | |
d5c30e52 |
631 | $self->attribute_metaclass->interpolate_class_and_new($name, @args); |
1341f10c |
632 | } |
633 | |
634 | sub _process_inherited_attribute { |
635 | my ($self, $attr_name, %options) = @_; |
636 | my $inherited_attr = $self->find_attribute_by_name($attr_name); |
637 | (defined $inherited_attr) |
329c5dd4 |
638 | || $self->throw_error("Could not find an attribute by the name of '$attr_name' to inherit from in ${\$self->name}", data => $attr_name); |
1341f10c |
639 | if ($inherited_attr->isa('Moose::Meta::Attribute')) { |
d7d8a8c7 |
640 | return $inherited_attr->clone_and_inherit_options(%options); |
1341f10c |
641 | } |
642 | else { |
643 | # NOTE: |
644 | # kind of a kludge to handle Class::MOP::Attributes |
d7d8a8c7 |
645 | return $inherited_attr->Moose::Meta::Attribute::clone_and_inherit_options(%options); |
ac2dc464 |
646 | } |
1341f10c |
647 | } |
648 | |
17c594b1 |
649 | # reinitialization support |
650 | |
651 | sub _restore_metaobjects_from { |
652 | my $self = shift; |
653 | my ($old_meta) = @_; |
654 | |
655 | $self->SUPER::_restore_metaobjects_from($old_meta); |
656 | |
657 | for my $role ( @{ $old_meta->roles } ) { |
658 | $self->add_role($role); |
659 | } |
660 | |
661 | for my $application ( @{ $old_meta->_get_role_applications } ) { |
662 | $application->class($self); |
663 | $self->add_role_application ($application); |
664 | } |
665 | } |
666 | |
948cd189 |
667 | ## Immutability |
668 | |
669 | sub _immutable_options { |
670 | my ( $self, @args ) = @_; |
671 | |
672 | $self->SUPER::_immutable_options( |
673 | inline_destructor => 1, |
948cd189 |
674 | |
675 | # Moose always does this when an attribute is created |
676 | inline_accessors => 0, |
677 | |
678 | @args, |
679 | ); |
680 | } |
681 | |
5cf3dbcf |
682 | ## ------------------------------------------------- |
683 | |
bf6fa6b3 |
684 | our $error_level; |
11c86f15 |
685 | |
686 | sub throw_error { |
687 | my ( $self, @args ) = @_; |
bf6fa6b3 |
688 | local $error_level = ($error_level || 0) + 1; |
11c86f15 |
689 | $self->raise_error($self->create_error(@args)); |
690 | } |
691 | |
e3225a0f |
692 | sub _inline_throw_error { |
693 | my ( $self, $msg, $args ) = @_; |
694 | "\$meta->throw_error($msg" . ($args ? ", $args" : "") . ")"; # FIXME makes deparsing *REALLY* hard |
695 | } |
696 | |
11c86f15 |
697 | sub raise_error { |
698 | my ( $self, @args ) = @_; |
699 | die @args; |
700 | } |
701 | |
702 | sub create_error { |
703 | my ( $self, @args ) = @_; |
704 | |
18748ad6 |
705 | require Carp::Heavy; |
706 | |
bf6fa6b3 |
707 | local $error_level = ($error_level || 0 ) + 1; |
18748ad6 |
708 | |
11c86f15 |
709 | if ( @args % 2 == 1 ) { |
710 | unshift @args, "message"; |
711 | } |
712 | |
fcab1742 |
713 | my %args = ( metaclass => $self, last_error => $@, @args ); |
11c86f15 |
714 | |
bf6fa6b3 |
715 | $args{depth} += $error_level; |
11c86f15 |
716 | |
bf6fa6b3 |
717 | my $class = ref $self ? $self->error_class : "Moose::Error::Default"; |
11c86f15 |
718 | |
a810a01f |
719 | Class::MOP::load_class($class); |
720 | |
11c86f15 |
721 | $class->new( |
bf6fa6b3 |
722 | Carp::caller_info($args{depth}), |
723 | %args |
11c86f15 |
724 | ); |
725 | } |
726 | |
c0e30cf5 |
727 | 1; |
728 | |
ad46f524 |
729 | # ABSTRACT: The Moose metaclass |
730 | |
c0e30cf5 |
731 | __END__ |
732 | |
733 | =pod |
734 | |
c0e30cf5 |
735 | =head1 DESCRIPTION |
736 | |
70bb0f97 |
737 | This class is a subclass of L<Class::MOP::Class> that provides |
738 | additional Moose-specific functionality. |
e522431d |
739 | |
7854b409 |
740 | To really understand this class, you will need to start with the |
741 | L<Class::MOP::Class> documentation. This class can be understood as a |
742 | set of additional features on top of the basic feature provided by |
743 | that parent class. |
6ba6d68c |
744 | |
d4b1449e |
745 | =head1 INHERITANCE |
746 | |
747 | C<Moose::Meta::Class> is a subclass of L<Class::MOP::Class>. |
748 | |
c0e30cf5 |
749 | =head1 METHODS |
750 | |
751 | =over 4 |
752 | |
70bb0f97 |
753 | =item B<< Moose::Meta::Class->initialize($package_name, %options) >> |
590868a3 |
754 | |
70bb0f97 |
755 | This overrides the parent's method in order to provide its own |
756 | defaults for the C<attribute_metaclass>, C<instance_metaclass>, and |
757 | C<method_metaclass> options. |
61bdd94f |
758 | |
70bb0f97 |
759 | These all default to the appropriate Moose class. |
61bdd94f |
760 | |
70bb0f97 |
761 | =item B<< Moose::Meta::Class->create($package_name, %options) >> |
17594769 |
762 | |
70bb0f97 |
763 | This overrides the parent's method in order to accept a C<roles> |
9e25a72a |
764 | option. This should be an array reference containing roles |
765 | that the class does, each optionally followed by a hashref of options |
766 | (C<-excludes> and C<-alias>). |
17594769 |
767 | |
70bb0f97 |
768 | my $metaclass = Moose::Meta::Class->create( 'New::Class', roles => [...] ); |
17594769 |
769 | |
70bb0f97 |
770 | =item B<< Moose::Meta::Class->create_anon_class >> |
17594769 |
771 | |
70bb0f97 |
772 | This overrides the parent's method to accept a C<roles> option, just |
773 | as C<create> does. |
5cf3dbcf |
774 | |
70bb0f97 |
775 | It also accepts a C<cache> option. If this is true, then the anonymous |
776 | class will be cached based on its superclasses and roles. If an |
777 | existing anonymous class in the cache has the same superclasses and |
778 | roles, it will be reused. |
ac2dc464 |
779 | |
70bb0f97 |
780 | my $metaclass = Moose::Meta::Class->create_anon_class( |
781 | superclasses => ['Foo'], |
782 | roles => [qw/Some Roles Go Here/], |
783 | cache => 1, |
784 | ); |
ac2dc464 |
785 | |
2e7f6cf4 |
786 | Each entry in both the C<superclasses> and the C<roles> option can be |
b2d54db8 |
787 | followed by a hash reference with arguments. The C<superclasses> |
2e7f6cf4 |
788 | option can be supplied with a L<-version|Class::MOP/Class Loading |
789 | Options> option that ensures the loaded superclass satisfies the |
790 | required version. The C<role> option also takes the C<-version> as an |
791 | argument, but the option hash reference can also contain any other |
792 | role relevant values like exclusions or parameterized role arguments. |
793 | |
70bb0f97 |
794 | =item B<< $metaclass->make_immutable(%options) >> |
ac2dc464 |
795 | |
70bb0f97 |
796 | This overrides the parent's method to add a few options. Specifically, |
797 | it uses the Moose-specific constructor and destructor classes, and |
798 | enables inlining the destructor. |
8c9d74e7 |
799 | |
dcdceb38 |
800 | Since Moose always inlines attributes, it sets the C<inline_accessors> option |
801 | to false. |
802 | |
70bb0f97 |
803 | =item B<< $metaclass->new_object(%params) >> |
a15dff8d |
804 | |
70bb0f97 |
805 | This overrides the parent's method in order to add support for |
806 | attribute triggers. |
6ba6d68c |
807 | |
2e7f6cf4 |
808 | =item B<< $metaclass->superclasses(@superclasses) >> |
809 | |
6b958a3e |
810 | This is the accessor allowing you to read or change the parents of |
2e7f6cf4 |
811 | the class. |
812 | |
813 | Each superclass can be followed by a hash reference containing a |
814 | L<-version|Class::MOP/Class Loading Options> value. If the version |
815 | requirement is not satisfied an error will be thrown. |
816 | |
70bb0f97 |
817 | =item B<< $metaclass->add_override_method_modifier($name, $sub) >> |
ef1d5f4b |
818 | |
70bb0f97 |
819 | This adds an C<override> method modifier to the package. |
e9ec68d6 |
820 | |
70bb0f97 |
821 | =item B<< $metaclass->add_augment_method_modifier($name, $sub) >> |
e9ec68d6 |
822 | |
70bb0f97 |
823 | This adds an C<augment> method modifier to the package. |
78cd1d3b |
824 | |
70bb0f97 |
825 | =item B<< $metaclass->calculate_all_roles >> |
02a0fb52 |
826 | |
70bb0f97 |
827 | This will return a unique array of C<Moose::Meta::Role> instances |
828 | which are attached to this class. |
78cd1d3b |
829 | |
9f83eb5d |
830 | =item B<< $metaclass->calculate_all_roles_with_inheritance >> |
831 | |
832 | This will return a unique array of C<Moose::Meta::Role> instances |
833 | which are attached to this class, and each of this class's ancestors. |
834 | |
70bb0f97 |
835 | =item B<< $metaclass->add_role($role) >> |
02a0fb52 |
836 | |
70bb0f97 |
837 | This takes a L<Moose::Meta::Role> object, and adds it to the class's |
838 | list of roles. This I<does not> actually apply the role to the class. |
2b14ac61 |
839 | |
b90dd4ef |
840 | =item B<< $metaclass->role_applications >> |
841 | |
639f9a1a |
842 | Returns a list of L<Moose::Meta::Role::Application::ToClass> |
b90dd4ef |
843 | objects, which contain the arguments to role application. |
844 | |
845 | =item B<< $metaclass->add_role_application($application) >> |
846 | |
847 | This takes a L<Moose::Meta::Role::Application::ToClass> object, and |
848 | adds it to the class's list of role applications. This I<does not> |
849 | actually apply any role to the class; it is only for tracking role |
850 | applications. |
851 | |
560c498d |
852 | =item B<< $metaclass->does_role($role) >> |
ef333f17 |
853 | |
560c498d |
854 | This returns a boolean indicating whether or not the class does the specified |
855 | role. The role provided can be either a role name or a L<Moose::Meta::Role> |
856 | object. This tests both the class and its parents. |
02a0fb52 |
857 | |
70bb0f97 |
858 | =item B<< $metaclass->excludes_role($role_name) >> |
ef333f17 |
859 | |
70bb0f97 |
860 | A class excludes a role if it has already composed a role which |
861 | excludes the named role. This tests both the class and its parents. |
02a0fb52 |
862 | |
70bb0f97 |
863 | =item B<< $metaclass->add_attribute($attr_name, %params|$params) >> |
ef333f17 |
864 | |
70bb0f97 |
865 | This overrides the parent's method in order to allow the parameters to |
866 | be provided as a hash reference. |
02a0fb52 |
867 | |
9f9fdd08 |
868 | =item B<< $metaclass->constructor_class($class_name) >> |
d79e62fd |
869 | |
9f9fdd08 |
870 | =item B<< $metaclass->destructor_class($class_name) >> |
e606ae5f |
871 | |
948cd189 |
872 | These are the names of classes used when making a class immutable. These |
90a49845 |
873 | default to L<Moose::Meta::Method::Constructor> and |
874 | L<Moose::Meta::Method::Destructor> respectively. These accessors are |
875 | read-write, so you can use them to change the class name. |
e606ae5f |
876 | |
70bb0f97 |
877 | =item B<< $metaclass->error_class($class_name) >> |
8b1d510f |
878 | |
70bb0f97 |
879 | The name of the class used to throw errors. This defaults to |
8b1d510f |
880 | L<Moose::Error::Default>, which generates an error with a stacktrace |
881 | just like C<Carp::confess>. |
882 | |
70bb0f97 |
883 | =item B<< $metaclass->throw_error($message, %extra) >> |
11c86f15 |
884 | |
885 | Throws the error created by C<create_error> using C<raise_error> |
886 | |
c0e30cf5 |
887 | =back |
888 | |
889 | =head1 BUGS |
890 | |
d4048ef3 |
891 | See L<Moose/BUGS> for details on reporting bugs. |
c0e30cf5 |
892 | |
8a7a9c53 |
893 | =cut |
1a563243 |
894 | |