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 | |
11c86f15 |
9 | use Carp (); |
f8b6827f |
10 | use List::Util qw( first ); |
8b1d510f |
11 | use List::MoreUtils qw( any all uniq ); |
21f1e231 |
12 | use Scalar::Util 'weaken', 'blessed'; |
a15dff8d |
13 | |
56d7c745 |
14 | our $VERSION = '0.73'; |
e606ae5f |
15 | $VERSION = eval $VERSION; |
d44714be |
16 | our $AUTHORITY = 'cpan:STEVAN'; |
bc1e29b5 |
17 | |
74862722 |
18 | use Moose::Meta::Method::Overridden; |
3f9e4b0a |
19 | use Moose::Meta::Method::Augmented; |
bf6fa6b3 |
20 | use Moose::Error::Default; |
8ee73eeb |
21 | |
c0e30cf5 |
22 | use base 'Class::MOP::Class'; |
23 | |
598340d5 |
24 | __PACKAGE__->meta->add_attribute('roles' => ( |
ef333f17 |
25 | reader => 'roles', |
26 | default => sub { [] } |
27 | )); |
28 | |
e606ae5f |
29 | __PACKAGE__->meta->add_attribute('constructor_class' => ( |
30 | accessor => 'constructor_class', |
e0001338 |
31 | default => 'Moose::Meta::Method::Constructor', |
e606ae5f |
32 | )); |
33 | |
34 | __PACKAGE__->meta->add_attribute('destructor_class' => ( |
35 | accessor => 'destructor_class', |
e0001338 |
36 | default => 'Moose::Meta::Method::Destructor', |
e606ae5f |
37 | )); |
38 | |
11c86f15 |
39 | __PACKAGE__->meta->add_attribute('error_class' => ( |
bf6fa6b3 |
40 | accessor => 'error_class', |
41 | default => 'Moose::Error::Default', |
11c86f15 |
42 | )); |
43 | |
44 | |
590868a3 |
45 | sub initialize { |
46 | my $class = shift; |
47 | my $pkg = shift; |
685f7e44 |
48 | return Class::MOP::get_metaclass_by_name($pkg) |
49 | || $class->SUPER::initialize($pkg, |
50 | 'attribute_metaclass' => 'Moose::Meta::Attribute', |
51 | 'method_metaclass' => 'Moose::Meta::Method', |
52 | 'instance_metaclass' => 'Moose::Meta::Instance', |
53 | @_ |
54 | ); |
ac2dc464 |
55 | } |
590868a3 |
56 | |
61bdd94f |
57 | sub create { |
58 | my ($self, $package_name, %options) = @_; |
59 | |
60 | (ref $options{roles} eq 'ARRAY') |
11c86f15 |
61 | || $self->throw_error("You must pass an ARRAY ref of roles", data => $options{roles}) |
61bdd94f |
62 | if exists $options{roles}; |
310ba883 |
63 | my $roles = delete $options{roles}; |
dd37a5be |
64 | |
61bdd94f |
65 | my $class = $self->SUPER::create($package_name, %options); |
dd37a5be |
66 | |
310ba883 |
67 | if ($roles) { |
68 | Moose::Util::apply_all_roles( $class, @$roles ); |
61bdd94f |
69 | } |
70 | |
71 | return $class; |
72 | } |
73 | |
2b72f3b4 |
74 | sub check_metaclass_compatibility { |
75 | my $self = shift; |
76 | |
77 | if ( my @supers = $self->superclasses ) { |
78 | $self->_fix_metaclass_incompatibility(@supers); |
79 | } |
80 | |
81 | $self->SUPER::check_metaclass_compatibility(@_); |
82 | } |
83 | |
17594769 |
84 | my %ANON_CLASSES; |
85 | |
86 | sub create_anon_class { |
87 | my ($self, %options) = @_; |
88 | |
89 | my $cache_ok = delete $options{cache}; |
17594769 |
90 | |
91 | # something like Super::Class|Super::Class::2=Role|Role::1 |
92 | my $cache_key = join '=' => ( |
11aaed6c |
93 | join('|', @{$options{superclasses} || []}), |
94 | join('|', sort @{$options{roles} || []}), |
17594769 |
95 | ); |
96 | |
6d5cbd2b |
97 | if ($cache_ok && defined $ANON_CLASSES{$cache_key}) { |
17594769 |
98 | return $ANON_CLASSES{$cache_key}; |
99 | } |
100 | |
101 | my $new_class = $self->SUPER::create_anon_class(%options); |
102 | |
6d5cbd2b |
103 | $ANON_CLASSES{$cache_key} = $new_class |
104 | if $cache_ok; |
17594769 |
105 | |
106 | return $new_class; |
107 | } |
108 | |
ef333f17 |
109 | sub add_role { |
110 | my ($self, $role) = @_; |
111 | (blessed($role) && $role->isa('Moose::Meta::Role')) |
11c86f15 |
112 | || $self->throw_error("Roles must be instances of Moose::Meta::Role", data => $role); |
ef333f17 |
113 | push @{$self->roles} => $role; |
114 | } |
115 | |
b8aeb4dc |
116 | sub calculate_all_roles { |
117 | my $self = shift; |
118 | my %seen; |
119 | grep { !$seen{$_->name}++ } map { $_->calculate_all_roles } @{ $self->roles }; |
120 | } |
121 | |
ef333f17 |
122 | sub does_role { |
123 | my ($self, $role_name) = @_; |
322abb07 |
124 | |
ef333f17 |
125 | (defined $role_name) |
11c86f15 |
126 | || $self->throw_error("You must supply a role name to look for"); |
322abb07 |
127 | |
9c429218 |
128 | foreach my $class ($self->class_precedence_list) { |
322abb07 |
129 | my $meta = Class::MOP::class_of($class); |
130 | next unless $meta && $meta->can('roles'); |
131 | foreach my $role (@{$meta->roles}) { |
9c429218 |
132 | return 1 if $role->does_role($role_name); |
133 | } |
ef333f17 |
134 | } |
135 | return 0; |
136 | } |
137 | |
d79e62fd |
138 | sub excludes_role { |
139 | my ($self, $role_name) = @_; |
140 | (defined $role_name) |
11c86f15 |
141 | || $self->throw_error("You must supply a role name to look for"); |
ac2dc464 |
142 | foreach my $class ($self->class_precedence_list) { |
143 | next unless $class->can('meta'); |
5cb193ed |
144 | # NOTE: |
145 | # in the pretty rare instance when a Moose metaclass |
ac2dc464 |
146 | # is itself extended with a role, this check needs to |
5cb193ed |
147 | # be done since some items in the class_precedence_list |
ac2dc464 |
148 | # might in fact be Class::MOP based still. |
149 | next unless $class->meta->can('roles'); |
9c429218 |
150 | foreach my $role (@{$class->meta->roles}) { |
151 | return 1 if $role->excludes_role($role_name); |
152 | } |
d79e62fd |
153 | } |
154 | return 0; |
155 | } |
156 | |
8c9d74e7 |
157 | sub new_object { |
1308deb4 |
158 | my $class = shift; |
e606ae5f |
159 | my $params = @_ == 1 ? $_[0] : {@_}; |
1308deb4 |
160 | my $self = $class->SUPER::new_object($params); |
161 | |
162 | foreach my $attr ( $class->compute_all_applicable_attributes() ) { |
163 | |
164 | next unless $attr->can('has_trigger') && $attr->has_trigger; |
165 | |
166 | my $init_arg = $attr->init_arg; |
167 | |
168 | next unless defined $init_arg; |
169 | |
170 | next unless exists $params->{$init_arg}; |
171 | |
172 | $attr->trigger->( |
173 | $self, |
174 | ( |
175 | $attr->should_coerce |
176 | ? $attr->get_read_method_ref->($self) |
177 | : $params->{$init_arg} |
178 | ), |
179 | $attr |
180 | ); |
8c9d74e7 |
181 | } |
1308deb4 |
182 | |
ac2dc464 |
183 | return $self; |
8c9d74e7 |
184 | } |
185 | |
a15dff8d |
186 | sub construct_instance { |
e606ae5f |
187 | my $class = shift; |
188 | my $params = @_ == 1 ? $_[0] : {@_}; |
ddd0ec20 |
189 | my $meta_instance = $class->get_meta_instance; |
575db57d |
190 | # FIXME: |
191 | # the code below is almost certainly incorrect |
6549b0d1 |
192 | # but this is foreign inheritance, so we might |
ac2dc464 |
193 | # have to kludge it in the end. |
e606ae5f |
194 | my $instance = $params->{'__INSTANCE__'} || $meta_instance->create_instance(); |
ac2dc464 |
195 | foreach my $attr ($class->compute_all_applicable_attributes()) { |
e606ae5f |
196 | $attr->initialize_instance_slot($meta_instance, $instance, $params); |
a15dff8d |
197 | } |
198 | return $instance; |
199 | } |
200 | |
093b12c2 |
201 | ### --------------------------------------------- |
202 | |
a2eec5e7 |
203 | sub add_attribute { |
204 | my $self = shift; |
e472c9a5 |
205 | $self->SUPER::add_attribute( |
206 | (blessed $_[0] && $_[0]->isa('Class::MOP::Attribute') |
207 | ? $_[0] |
208 | : $self->_process_attribute(@_)) |
209 | ); |
a2eec5e7 |
210 | } |
211 | |
78cd1d3b |
212 | sub add_override_method_modifier { |
213 | my ($self, $name, $method, $_super_package) = @_; |
18c2ec0e |
214 | |
d05cd563 |
215 | (!$self->has_method($name)) |
11c86f15 |
216 | || $self->throw_error("Cannot add an override method if a local method is already present"); |
18c2ec0e |
217 | |
74862722 |
218 | $self->add_method($name => Moose::Meta::Method::Overridden->new( |
3f9e4b0a |
219 | method => $method, |
220 | class => $self, |
221 | package => $_super_package, # need this for roles |
222 | name => $name, |
18c2ec0e |
223 | )); |
78cd1d3b |
224 | } |
225 | |
226 | sub add_augment_method_modifier { |
ac2dc464 |
227 | my ($self, $name, $method) = @_; |
d05cd563 |
228 | (!$self->has_method($name)) |
11c86f15 |
229 | || $self->throw_error("Cannot add an augment method if a local method is already present"); |
3f9e4b0a |
230 | |
231 | $self->add_method($name => Moose::Meta::Method::Augmented->new( |
232 | method => $method, |
233 | class => $self, |
234 | name => $name, |
235 | )); |
78cd1d3b |
236 | } |
237 | |
1341f10c |
238 | ## Private Utility methods ... |
239 | |
05d9eaf6 |
240 | sub _find_next_method_by_name_which_is_not_overridden { |
241 | my ($self, $name) = @_; |
68efb014 |
242 | foreach my $method ($self->find_all_methods_by_name($name)) { |
ac2dc464 |
243 | return $method->{code} |
74862722 |
244 | if blessed($method->{code}) && !$method->{code}->isa('Moose::Meta::Method::Overridden'); |
05d9eaf6 |
245 | } |
246 | return undef; |
247 | } |
248 | |
41419b9e |
249 | sub _fix_metaclass_incompatibility { |
1341f10c |
250 | my ($self, @superclasses) = @_; |
e606ae5f |
251 | |
1341f10c |
252 | foreach my $super (@superclasses) { |
f8b6827f |
253 | next if $self->_superclass_meta_is_compatible($super); |
e606ae5f |
254 | |
255 | unless ( $self->is_pristine ) { |
f8b6827f |
256 | $self->throw_error( |
257 | "Cannot attempt to reinitialize metaclass for " |
258 | . $self->name |
259 | . ", it isn't pristine" ); |
1341f10c |
260 | } |
e606ae5f |
261 | |
0635500e |
262 | $self->_reconcile_with_superclass_meta($super); |
f8b6827f |
263 | } |
f8b6827f |
264 | } |
265 | |
266 | sub _superclass_meta_is_compatible { |
267 | my ($self, $super) = @_; |
268 | |
269 | my $super_meta = Class::MOP::Class->initialize($super) |
270 | or return 1; |
271 | |
272 | next unless $super_meta->isa("Class::MOP::Class"); |
273 | |
274 | my $super_meta_name |
275 | = $super_meta->is_immutable |
276 | ? $super_meta->get_mutable_metaclass_name |
277 | : ref($super_meta); |
278 | |
279 | return 1 |
280 | if $self->isa($super_meta_name) |
281 | and |
282 | $self->instance_metaclass->isa( $super_meta->instance_metaclass ); |
283 | } |
284 | |
285 | # I don't want to have to type this >1 time |
286 | my @MetaClassTypes = |
8b1d510f |
287 | qw( attribute_metaclass method_metaclass instance_metaclass |
288 | constructor_class destructor_class error_class ); |
f8b6827f |
289 | |
290 | sub _reconcile_with_superclass_meta { |
291 | my ($self, $super) = @_; |
292 | |
293 | my $super_meta = $super->meta; |
294 | |
dd37a5be |
295 | my $super_meta_name |
f8b6827f |
296 | = $super_meta->is_immutable |
297 | ? $super_meta->get_mutable_metaclass_name |
298 | : ref($super_meta); |
e606ae5f |
299 | |
f8b6827f |
300 | my $self_metaclass = ref $self; |
301 | |
302 | # If neither of these is true we have a more serious |
303 | # incompatibility that we just cannot fix (yet?). |
dd37a5be |
304 | if ( $super_meta_name->isa( ref $self ) |
f8b6827f |
305 | && all { $super_meta->$_->isa( $self->$_ ) } @MetaClassTypes ) { |
0635500e |
306 | $self->_reinitialize_with($super_meta); |
f8b6827f |
307 | } |
308 | elsif ( $self->_all_metaclasses_differ_by_roles_only($super_meta) ) { |
0635500e |
309 | $self->_reconcile_role_differences($super_meta); |
1341f10c |
310 | } |
1341f10c |
311 | } |
312 | |
f8b6827f |
313 | sub _reinitialize_with { |
314 | my ( $self, $new_meta ) = @_; |
315 | |
0635500e |
316 | my $new_self = $new_meta->reinitialize( |
f8b6827f |
317 | $self->name, |
318 | attribute_metaclass => $new_meta->attribute_metaclass, |
319 | method_metaclass => $new_meta->method_metaclass, |
320 | instance_metaclass => $new_meta->instance_metaclass, |
321 | ); |
322 | |
8b1d510f |
323 | $new_self->$_( $new_meta->$_ ) |
324 | for qw( constructor_class destructor_class error_class ); |
f8b6827f |
325 | |
0635500e |
326 | %$self = %$new_self; |
327 | |
328 | bless $self, ref $new_self; |
329 | |
4c5fcc12 |
330 | # We need to replace the cached metaclass instance or else when it |
331 | # goes out of scope Class::MOP::Class destroy's the namespace for |
332 | # the metaclass's class, causing much havoc. |
0635500e |
333 | Class::MOP::store_metaclass_by_name( $self->name, $self ); |
4c5fcc12 |
334 | Class::MOP::weaken_metaclass( $self->name ) if $self->is_anon_class; |
f8b6827f |
335 | } |
336 | |
337 | # In the more complex case, we share a common ancestor with our |
338 | # superclass's metaclass, but each metaclass (ours and the parent's) |
339 | # has a different set of roles applied. We reconcile this by first |
340 | # reinitializing into the parent class, and _then_ applying our own |
341 | # roles. |
342 | sub _all_metaclasses_differ_by_roles_only { |
343 | my ($self, $super_meta) = @_; |
344 | |
345 | for my $pair ( |
346 | [ ref $self, ref $super_meta ], |
347 | map { [ $self->$_, $super_meta->$_ ] } @MetaClassTypes |
348 | ) { |
349 | |
350 | next if $pair->[0] eq $pair->[1]; |
351 | |
352 | my $self_meta_meta = Class::MOP::Class->initialize( $pair->[0] ); |
353 | my $super_meta_meta = Class::MOP::Class->initialize( $pair->[1] ); |
354 | |
355 | my $common_ancestor |
356 | = _find_common_ancestor( $self_meta_meta, $super_meta_meta ); |
357 | |
358 | return unless $common_ancestor; |
359 | |
360 | return |
361 | unless _is_role_only_subclass_of( |
362 | $self_meta_meta, |
363 | $common_ancestor, |
364 | ) |
365 | && _is_role_only_subclass_of( |
366 | $super_meta_meta, |
367 | $common_ancestor, |
368 | ); |
369 | } |
370 | |
371 | return 1; |
372 | } |
373 | |
374 | # This, and some other functions, could be called as methods, but |
375 | # they're not for two reasons. One, we just end up ignoring the first |
376 | # argument, because we can't call these directly on one of the real |
377 | # arguments, because one of them could be a Class::MOP::Class object |
378 | # and not a Moose::Meta::Class. Second, only a completely insane |
379 | # person would attempt to subclass this stuff! |
380 | sub _find_common_ancestor { |
381 | my ($meta1, $meta2) = @_; |
382 | |
383 | # FIXME? This doesn't account for multiple inheritance (not sure |
384 | # if it needs to though). For example, is somewhere in $meta1's |
db9fda52 |
385 | # history it inherits from both ClassA and ClassB, and $meta2 |
f8b6827f |
386 | # inherits from ClassB & ClassA, does it matter? And what crazy |
387 | # fool would do that anyway? |
388 | |
389 | my %meta1_parents = map { $_ => 1 } $meta1->linearized_isa; |
390 | |
391 | return first { $meta1_parents{$_} } $meta2->linearized_isa; |
392 | } |
393 | |
394 | sub _is_role_only_subclass_of { |
395 | my ($meta, $ancestor) = @_; |
396 | |
397 | return 1 if $meta->name eq $ancestor; |
398 | |
399 | my @roles = _all_roles_until( $meta, $ancestor ); |
400 | |
401 | my %role_packages = map { $_->name => 1 } @roles; |
402 | |
403 | my $ancestor_meta = Class::MOP::Class->initialize($ancestor); |
404 | |
405 | my %shared_ancestors = map { $_ => 1 } $ancestor_meta->linearized_isa; |
406 | |
407 | for my $method ( $meta->get_all_methods() ) { |
408 | next if $method->name eq 'meta'; |
409 | next if $method->can('associated_attribute'); |
410 | |
411 | next |
412 | if $role_packages{ $method->original_package_name } |
413 | || $shared_ancestors{ $method->original_package_name }; |
414 | |
415 | return 0; |
416 | } |
417 | |
418 | # FIXME - this really isn't right. Just because an attribute is |
419 | # defined in a role doesn't mean it isn't _also_ defined in the |
420 | # subclass. |
421 | for my $attr ( $meta->get_all_attributes ) { |
422 | next if $shared_ancestors{ $attr->associated_class->name }; |
423 | |
424 | next if any { $_->has_attribute( $attr->name ) } @roles; |
425 | |
426 | return 0; |
427 | } |
428 | |
429 | return 1; |
430 | } |
431 | |
432 | sub _all_roles { |
433 | my $meta = shift; |
434 | |
435 | return _all_roles_until($meta); |
436 | } |
437 | |
438 | sub _all_roles_until { |
439 | my ($meta, $stop_at_class) = @_; |
440 | |
441 | return unless $meta->can('calculate_all_roles'); |
442 | |
443 | my @roles = $meta->calculate_all_roles; |
444 | |
445 | for my $class ( $meta->linearized_isa ) { |
446 | last if $stop_at_class && $stop_at_class eq $class; |
447 | |
448 | my $meta = Class::MOP::Class->initialize($class); |
449 | last unless $meta->can('calculate_all_roles'); |
450 | |
451 | push @roles, $meta->calculate_all_roles; |
452 | } |
453 | |
8b1d510f |
454 | return uniq @roles; |
f8b6827f |
455 | } |
456 | |
457 | sub _reconcile_role_differences { |
458 | my ($self, $super_meta) = @_; |
459 | |
460 | my $self_meta = $self->meta; |
461 | |
462 | my %roles; |
463 | |
464 | if ( my @roles = map { $_->name } _all_roles($self_meta) ) { |
465 | $roles{metaclass_roles} = \@roles; |
466 | } |
467 | |
468 | for my $thing (@MetaClassTypes) { |
469 | my $name = $self->$thing(); |
470 | |
471 | my $thing_meta = Class::MOP::Class->initialize($name); |
472 | |
473 | my @roles = map { $_->name } _all_roles($thing_meta) |
474 | or next; |
475 | |
476 | $roles{ $thing . '_roles' } = \@roles; |
477 | } |
478 | |
2b72f3b4 |
479 | $self->_reinitialize_with($super_meta); |
f8b6827f |
480 | |
481 | Moose::Util::MetaRole::apply_metaclass_roles( |
482 | for_class => $self->name, |
483 | %roles, |
484 | ); |
485 | |
486 | return $self; |
487 | } |
488 | |
d7d8a8c7 |
489 | # NOTE: |
d9bb6c63 |
490 | # this was crap anyway, see |
491 | # Moose::Util::apply_all_roles |
d7d8a8c7 |
492 | # instead |
4498537c |
493 | sub _apply_all_roles { |
547dda77 |
494 | Carp::croak 'DEPRECATED: use Moose::Util::apply_all_roles($meta, @roles) instead' |
4498537c |
495 | } |
1341f10c |
496 | |
497 | sub _process_attribute { |
a3738e5b |
498 | my ( $self, $name, @args ) = @_; |
7e59b803 |
499 | |
500 | @args = %{$args[0]} if scalar @args == 1 && ref($args[0]) eq 'HASH'; |
d9bb6c63 |
501 | |
f9b5f5f8 |
502 | if (($name || '') =~ /^\+(.*)/) { |
7e59b803 |
503 | return $self->_process_inherited_attribute($1, @args); |
1341f10c |
504 | } |
505 | else { |
7e59b803 |
506 | return $self->_process_new_attribute($name, @args); |
507 | } |
508 | } |
509 | |
510 | sub _process_new_attribute { |
511 | my ( $self, $name, @args ) = @_; |
7e59b803 |
512 | |
d5c30e52 |
513 | $self->attribute_metaclass->interpolate_class_and_new($name, @args); |
1341f10c |
514 | } |
515 | |
516 | sub _process_inherited_attribute { |
517 | my ($self, $attr_name, %options) = @_; |
518 | my $inherited_attr = $self->find_attribute_by_name($attr_name); |
519 | (defined $inherited_attr) |
329c5dd4 |
520 | || $self->throw_error("Could not find an attribute by the name of '$attr_name' to inherit from in ${\$self->name}", data => $attr_name); |
1341f10c |
521 | if ($inherited_attr->isa('Moose::Meta::Attribute')) { |
d7d8a8c7 |
522 | return $inherited_attr->clone_and_inherit_options(%options); |
1341f10c |
523 | } |
524 | else { |
525 | # NOTE: |
526 | # kind of a kludge to handle Class::MOP::Attributes |
d7d8a8c7 |
527 | return $inherited_attr->Moose::Meta::Attribute::clone_and_inherit_options(%options); |
ac2dc464 |
528 | } |
1341f10c |
529 | } |
530 | |
5cf3dbcf |
531 | ## ------------------------------------------------- |
532 | |
533 | use Moose::Meta::Method::Constructor; |
1f779926 |
534 | use Moose::Meta::Method::Destructor; |
5cf3dbcf |
535 | |
ac2dc464 |
536 | |
70695d9c |
537 | sub _default_immutable_transformer_options { |
ac2dc464 |
538 | my $self = shift; |
70695d9c |
539 | |
540 | my %options = $self->SUPER::_default_immutable_transformer_options; |
541 | |
542 | # We need to copy the references as we do not want to alter the |
543 | # superclass's references. |
544 | $options{cannot_call} = [ @{ $options{cannot_call} }, 'add_role' ]; |
545 | $options{memoize} = { |
546 | %{ $options{memoize} }, |
547 | calculate_all_roles => 'ARRAY', |
548 | }; |
549 | |
550 | %options = ( |
551 | %options, |
552 | constructor_class => $self->constructor_class, |
553 | destructor_class => $self->destructor_class, |
554 | inline_destructor => 1, |
555 | |
556 | # Moose always does this when an attribute is created |
557 | inline_accessors => 0, |
558 | ); |
559 | |
560 | return %options |
5cf3dbcf |
561 | } |
562 | |
bf6fa6b3 |
563 | our $error_level; |
11c86f15 |
564 | |
565 | sub throw_error { |
566 | my ( $self, @args ) = @_; |
bf6fa6b3 |
567 | local $error_level = ($error_level || 0) + 1; |
11c86f15 |
568 | $self->raise_error($self->create_error(@args)); |
569 | } |
570 | |
571 | sub raise_error { |
572 | my ( $self, @args ) = @_; |
573 | die @args; |
574 | } |
575 | |
576 | sub create_error { |
577 | my ( $self, @args ) = @_; |
578 | |
18748ad6 |
579 | require Carp::Heavy; |
580 | |
bf6fa6b3 |
581 | local $error_level = ($error_level || 0 ) + 1; |
18748ad6 |
582 | |
11c86f15 |
583 | if ( @args % 2 == 1 ) { |
584 | unshift @args, "message"; |
585 | } |
586 | |
fcab1742 |
587 | my %args = ( metaclass => $self, last_error => $@, @args ); |
11c86f15 |
588 | |
bf6fa6b3 |
589 | $args{depth} += $error_level; |
11c86f15 |
590 | |
bf6fa6b3 |
591 | my $class = ref $self ? $self->error_class : "Moose::Error::Default"; |
11c86f15 |
592 | |
a810a01f |
593 | Class::MOP::load_class($class); |
594 | |
11c86f15 |
595 | $class->new( |
bf6fa6b3 |
596 | Carp::caller_info($args{depth}), |
597 | %args |
11c86f15 |
598 | ); |
599 | } |
600 | |
c0e30cf5 |
601 | 1; |
602 | |
603 | __END__ |
604 | |
605 | =pod |
606 | |
607 | =head1 NAME |
608 | |
e522431d |
609 | Moose::Meta::Class - The Moose metaclass |
c0e30cf5 |
610 | |
c0e30cf5 |
611 | =head1 DESCRIPTION |
612 | |
70bb0f97 |
613 | This class is a subclass of L<Class::MOP::Class> that provides |
614 | additional Moose-specific functionality. |
e522431d |
615 | |
7854b409 |
616 | To really understand this class, you will need to start with the |
617 | L<Class::MOP::Class> documentation. This class can be understood as a |
618 | set of additional features on top of the basic feature provided by |
619 | that parent class. |
6ba6d68c |
620 | |
d4b1449e |
621 | =head1 INHERITANCE |
622 | |
623 | C<Moose::Meta::Class> is a subclass of L<Class::MOP::Class>. |
624 | |
c0e30cf5 |
625 | =head1 METHODS |
626 | |
627 | =over 4 |
628 | |
70bb0f97 |
629 | =item B<< Moose::Meta::Class->initialize($package_name, %options) >> |
590868a3 |
630 | |
70bb0f97 |
631 | This overrides the parent's method in order to provide its own |
632 | defaults for the C<attribute_metaclass>, C<instance_metaclass>, and |
633 | C<method_metaclass> options. |
61bdd94f |
634 | |
70bb0f97 |
635 | These all default to the appropriate Moose class. |
61bdd94f |
636 | |
70bb0f97 |
637 | =item B<< Moose::Meta::Class->create($package_name, %options) >> |
17594769 |
638 | |
70bb0f97 |
639 | This overrides the parent's method in order to accept a C<roles> |
640 | option. This should be an array reference containing one more roles |
641 | that the class does. |
17594769 |
642 | |
70bb0f97 |
643 | my $metaclass = Moose::Meta::Class->create( 'New::Class', roles => [...] ); |
17594769 |
644 | |
70bb0f97 |
645 | =item B<< Moose::Meta::Class->create_anon_class >> |
17594769 |
646 | |
70bb0f97 |
647 | This overrides the parent's method to accept a C<roles> option, just |
648 | as C<create> does. |
5cf3dbcf |
649 | |
70bb0f97 |
650 | It also accepts a C<cache> option. If this is true, then the anonymous |
651 | class will be cached based on its superclasses and roles. If an |
652 | existing anonymous class in the cache has the same superclasses and |
653 | roles, it will be reused. |
ac2dc464 |
654 | |
70bb0f97 |
655 | my $metaclass = Moose::Meta::Class->create_anon_class( |
656 | superclasses => ['Foo'], |
657 | roles => [qw/Some Roles Go Here/], |
658 | cache => 1, |
659 | ); |
ac2dc464 |
660 | |
70bb0f97 |
661 | =item B<< $metaclass->make_immutable(%options) >> |
ac2dc464 |
662 | |
70bb0f97 |
663 | This overrides the parent's method to add a few options. Specifically, |
664 | it uses the Moose-specific constructor and destructor classes, and |
665 | enables inlining the destructor. |
8c9d74e7 |
666 | |
70bb0f97 |
667 | Also, since Moose always inlines attributes, it sets the |
668 | C<inline_accessors> option to false. |
02a0fb52 |
669 | |
70bb0f97 |
670 | =item B<< $metaclass->new_object(%params) >> |
a15dff8d |
671 | |
70bb0f97 |
672 | This overrides the parent's method in order to add support for |
673 | attribute triggers. |
6ba6d68c |
674 | |
70bb0f97 |
675 | =item B<< $metaclass->add_override_method_modifier($name, $sub) >> |
ef1d5f4b |
676 | |
70bb0f97 |
677 | This adds an C<override> method modifier to the package. |
e9ec68d6 |
678 | |
70bb0f97 |
679 | =item B<< $metaclass->add_augment_method_modifier($name, $sub) >> |
e9ec68d6 |
680 | |
70bb0f97 |
681 | This adds an C<augment> method modifier to the package. |
78cd1d3b |
682 | |
70bb0f97 |
683 | =item B<< $metaclass->calculate_all_roles >> |
02a0fb52 |
684 | |
70bb0f97 |
685 | This will return a unique array of C<Moose::Meta::Role> instances |
686 | which are attached to this class. |
78cd1d3b |
687 | |
70bb0f97 |
688 | =item B<< $metaclass->add_role($role) >> |
02a0fb52 |
689 | |
70bb0f97 |
690 | This takes a L<Moose::Meta::Role> object, and adds it to the class's |
691 | list of roles. This I<does not> actually apply the role to the class. |
2b14ac61 |
692 | |
70bb0f97 |
693 | =item B<< $metaclass->does_role($role_name) >> |
ef333f17 |
694 | |
70bb0f97 |
695 | This returns a boolean indicating whether or not the class does the |
696 | specified role. This tests both the class and its parents. |
02a0fb52 |
697 | |
70bb0f97 |
698 | =item B<< $metaclass->excludes_role($role_name) >> |
ef333f17 |
699 | |
70bb0f97 |
700 | A class excludes a role if it has already composed a role which |
701 | excludes the named role. This tests both the class and its parents. |
02a0fb52 |
702 | |
70bb0f97 |
703 | =item B<< $metaclass->add_attribute($attr_name, %params|$params) >> |
ef333f17 |
704 | |
70bb0f97 |
705 | This overrides the parent's method in order to allow the parameters to |
706 | be provided as a hash reference. |
02a0fb52 |
707 | |
70bb0f97 |
708 | =item B<< $metaclass->constructor_class ($class_name) >> |
d79e62fd |
709 | |
70bb0f97 |
710 | =item B<< $metaclass->destructor_class ($class_name) >> |
e606ae5f |
711 | |
712 | These are the names of classes used when making a class |
713 | immutable. These default to L<Moose::Meta::Method::Constructor> and |
714 | L<Moose::Meta::Method::Destructor> respectively. These accessors are |
715 | read-write, so you can use them to change the class name. |
716 | |
70bb0f97 |
717 | =item B<< $metaclass->error_class($class_name) >> |
8b1d510f |
718 | |
70bb0f97 |
719 | The name of the class used to throw errors. This defaults to |
8b1d510f |
720 | L<Moose::Error::Default>, which generates an error with a stacktrace |
721 | just like C<Carp::confess>. |
722 | |
70bb0f97 |
723 | =item B<< $metaclass->throw_error($message, %extra) >> |
11c86f15 |
724 | |
725 | Throws the error created by C<create_error> using C<raise_error> |
726 | |
c0e30cf5 |
727 | =back |
728 | |
729 | =head1 BUGS |
730 | |
ac2dc464 |
731 | All complex software has bugs lurking in it, and this module is no |
c0e30cf5 |
732 | exception. If you find a bug please either email me, or add the bug |
733 | to cpan-RT. |
734 | |
c0e30cf5 |
735 | =head1 AUTHOR |
736 | |
737 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
738 | |
739 | =head1 COPYRIGHT AND LICENSE |
740 | |
2840a3b2 |
741 | Copyright 2006-2009 by Infinity Interactive, Inc. |
c0e30cf5 |
742 | |
743 | L<http://www.iinteractive.com> |
744 | |
745 | This library is free software; you can redistribute it and/or modify |
ac2dc464 |
746 | it under the same terms as Perl itself. |
c0e30cf5 |
747 | |
8a7a9c53 |
748 | =cut |
1a563243 |
749 | |