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 | |
6302a7e8 |
14 | our $VERSION = '0.73_02'; |
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 | |
6a4a7c31 |
74 | sub _check_metaclass_compatibility { |
2b72f3b4 |
75 | my $self = shift; |
76 | |
77 | if ( my @supers = $self->superclasses ) { |
78 | $self->_fix_metaclass_incompatibility(@supers); |
79 | } |
80 | |
6a4a7c31 |
81 | $self->SUPER::_check_metaclass_compatibility(@_); |
2b72f3b4 |
82 | } |
83 | |
17594769 |
84 | my %ANON_CLASSES; |
85 | |
86 | sub create_anon_class { |
87 | my ($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); |
3d0f5a27 |
130 | # when a Moose metaclass is itself extended with a role, |
131 | # this check needs to be done since some items in the |
132 | # class_precedence_list might in fact be Class::MOP |
133 | # based still. |
322abb07 |
134 | next unless $meta && $meta->can('roles'); |
135 | foreach my $role (@{$meta->roles}) { |
9c429218 |
136 | return 1 if $role->does_role($role_name); |
137 | } |
ef333f17 |
138 | } |
139 | return 0; |
140 | } |
141 | |
d79e62fd |
142 | sub excludes_role { |
143 | my ($self, $role_name) = @_; |
ebfc4d0f |
144 | |
d79e62fd |
145 | (defined $role_name) |
11c86f15 |
146 | || $self->throw_error("You must supply a role name to look for"); |
ebfc4d0f |
147 | |
ac2dc464 |
148 | foreach my $class ($self->class_precedence_list) { |
ebfc4d0f |
149 | my $meta = Class::MOP::class_of($class); |
150 | # when a Moose metaclass is itself extended with a role, |
151 | # this check needs to be done since some items in the |
152 | # class_precedence_list might in fact be Class::MOP |
153 | # based still. |
154 | next unless $meta && $meta->can('roles'); |
155 | foreach my $role (@{$meta->roles}) { |
9c429218 |
156 | return 1 if $role->excludes_role($role_name); |
157 | } |
d79e62fd |
158 | } |
159 | return 0; |
160 | } |
161 | |
8c9d74e7 |
162 | sub new_object { |
1308deb4 |
163 | my $class = shift; |
e606ae5f |
164 | my $params = @_ == 1 ? $_[0] : {@_}; |
1308deb4 |
165 | my $self = $class->SUPER::new_object($params); |
166 | |
b2df9268 |
167 | foreach my $attr ( $class->get_all_attributes() ) { |
1308deb4 |
168 | |
169 | next unless $attr->can('has_trigger') && $attr->has_trigger; |
170 | |
171 | my $init_arg = $attr->init_arg; |
172 | |
173 | next unless defined $init_arg; |
174 | |
175 | next unless exists $params->{$init_arg}; |
176 | |
177 | $attr->trigger->( |
178 | $self, |
179 | ( |
180 | $attr->should_coerce |
181 | ? $attr->get_read_method_ref->($self) |
182 | : $params->{$init_arg} |
183 | ), |
1308deb4 |
184 | ); |
8c9d74e7 |
185 | } |
1308deb4 |
186 | |
ac2dc464 |
187 | return $self; |
8c9d74e7 |
188 | } |
189 | |
b2df9268 |
190 | sub _construct_instance { |
e606ae5f |
191 | my $class = shift; |
192 | my $params = @_ == 1 ? $_[0] : {@_}; |
ddd0ec20 |
193 | my $meta_instance = $class->get_meta_instance; |
575db57d |
194 | # FIXME: |
195 | # the code below is almost certainly incorrect |
6549b0d1 |
196 | # but this is foreign inheritance, so we might |
ac2dc464 |
197 | # have to kludge it in the end. |
e606ae5f |
198 | my $instance = $params->{'__INSTANCE__'} || $meta_instance->create_instance(); |
b2df9268 |
199 | foreach my $attr ($class->get_all_attributes()) { |
e606ae5f |
200 | $attr->initialize_instance_slot($meta_instance, $instance, $params); |
a15dff8d |
201 | } |
202 | return $instance; |
203 | } |
204 | |
093b12c2 |
205 | ### --------------------------------------------- |
206 | |
a2eec5e7 |
207 | sub add_attribute { |
208 | my $self = shift; |
e472c9a5 |
209 | $self->SUPER::add_attribute( |
210 | (blessed $_[0] && $_[0]->isa('Class::MOP::Attribute') |
211 | ? $_[0] |
212 | : $self->_process_attribute(@_)) |
213 | ); |
a2eec5e7 |
214 | } |
215 | |
78cd1d3b |
216 | sub add_override_method_modifier { |
217 | my ($self, $name, $method, $_super_package) = @_; |
18c2ec0e |
218 | |
d05cd563 |
219 | (!$self->has_method($name)) |
11c86f15 |
220 | || $self->throw_error("Cannot add an override method if a local method is already present"); |
18c2ec0e |
221 | |
74862722 |
222 | $self->add_method($name => Moose::Meta::Method::Overridden->new( |
3f9e4b0a |
223 | method => $method, |
224 | class => $self, |
225 | package => $_super_package, # need this for roles |
226 | name => $name, |
18c2ec0e |
227 | )); |
78cd1d3b |
228 | } |
229 | |
230 | sub add_augment_method_modifier { |
ac2dc464 |
231 | my ($self, $name, $method) = @_; |
d05cd563 |
232 | (!$self->has_method($name)) |
11c86f15 |
233 | || $self->throw_error("Cannot add an augment method if a local method is already present"); |
3f9e4b0a |
234 | |
235 | $self->add_method($name => Moose::Meta::Method::Augmented->new( |
236 | method => $method, |
237 | class => $self, |
238 | name => $name, |
239 | )); |
78cd1d3b |
240 | } |
241 | |
1341f10c |
242 | ## Private Utility methods ... |
243 | |
05d9eaf6 |
244 | sub _find_next_method_by_name_which_is_not_overridden { |
245 | my ($self, $name) = @_; |
68efb014 |
246 | foreach my $method ($self->find_all_methods_by_name($name)) { |
ac2dc464 |
247 | return $method->{code} |
74862722 |
248 | if blessed($method->{code}) && !$method->{code}->isa('Moose::Meta::Method::Overridden'); |
05d9eaf6 |
249 | } |
250 | return undef; |
251 | } |
252 | |
41419b9e |
253 | sub _fix_metaclass_incompatibility { |
1341f10c |
254 | my ($self, @superclasses) = @_; |
e606ae5f |
255 | |
1341f10c |
256 | foreach my $super (@superclasses) { |
f8b6827f |
257 | next if $self->_superclass_meta_is_compatible($super); |
e606ae5f |
258 | |
259 | unless ( $self->is_pristine ) { |
f8b6827f |
260 | $self->throw_error( |
261 | "Cannot attempt to reinitialize metaclass for " |
262 | . $self->name |
263 | . ", it isn't pristine" ); |
1341f10c |
264 | } |
e606ae5f |
265 | |
0635500e |
266 | $self->_reconcile_with_superclass_meta($super); |
f8b6827f |
267 | } |
f8b6827f |
268 | } |
269 | |
270 | sub _superclass_meta_is_compatible { |
271 | my ($self, $super) = @_; |
272 | |
273 | my $super_meta = Class::MOP::Class->initialize($super) |
274 | or return 1; |
275 | |
276 | next unless $super_meta->isa("Class::MOP::Class"); |
277 | |
278 | my $super_meta_name |
279 | = $super_meta->is_immutable |
280 | ? $super_meta->get_mutable_metaclass_name |
281 | : ref($super_meta); |
282 | |
283 | return 1 |
284 | if $self->isa($super_meta_name) |
285 | and |
286 | $self->instance_metaclass->isa( $super_meta->instance_metaclass ); |
287 | } |
288 | |
289 | # I don't want to have to type this >1 time |
290 | my @MetaClassTypes = |
8b1d510f |
291 | qw( attribute_metaclass method_metaclass instance_metaclass |
292 | constructor_class destructor_class error_class ); |
f8b6827f |
293 | |
294 | sub _reconcile_with_superclass_meta { |
295 | my ($self, $super) = @_; |
296 | |
29782f74 |
297 | my $super_meta = Class::MOP::class_of($super); |
f8b6827f |
298 | |
dd37a5be |
299 | my $super_meta_name |
f8b6827f |
300 | = $super_meta->is_immutable |
301 | ? $super_meta->get_mutable_metaclass_name |
302 | : ref($super_meta); |
e606ae5f |
303 | |
f8b6827f |
304 | my $self_metaclass = ref $self; |
305 | |
306 | # If neither of these is true we have a more serious |
307 | # incompatibility that we just cannot fix (yet?). |
dd37a5be |
308 | if ( $super_meta_name->isa( ref $self ) |
f8b6827f |
309 | && all { $super_meta->$_->isa( $self->$_ ) } @MetaClassTypes ) { |
0635500e |
310 | $self->_reinitialize_with($super_meta); |
f8b6827f |
311 | } |
312 | elsif ( $self->_all_metaclasses_differ_by_roles_only($super_meta) ) { |
0635500e |
313 | $self->_reconcile_role_differences($super_meta); |
1341f10c |
314 | } |
1341f10c |
315 | } |
316 | |
f8b6827f |
317 | sub _reinitialize_with { |
318 | my ( $self, $new_meta ) = @_; |
319 | |
0635500e |
320 | my $new_self = $new_meta->reinitialize( |
f8b6827f |
321 | $self->name, |
322 | attribute_metaclass => $new_meta->attribute_metaclass, |
323 | method_metaclass => $new_meta->method_metaclass, |
324 | instance_metaclass => $new_meta->instance_metaclass, |
325 | ); |
326 | |
8b1d510f |
327 | $new_self->$_( $new_meta->$_ ) |
328 | for qw( constructor_class destructor_class error_class ); |
f8b6827f |
329 | |
0635500e |
330 | %$self = %$new_self; |
331 | |
332 | bless $self, ref $new_self; |
333 | |
4c5fcc12 |
334 | # We need to replace the cached metaclass instance or else when it |
335 | # goes out of scope Class::MOP::Class destroy's the namespace for |
336 | # the metaclass's class, causing much havoc. |
0635500e |
337 | Class::MOP::store_metaclass_by_name( $self->name, $self ); |
4c5fcc12 |
338 | Class::MOP::weaken_metaclass( $self->name ) if $self->is_anon_class; |
f8b6827f |
339 | } |
340 | |
341 | # In the more complex case, we share a common ancestor with our |
342 | # superclass's metaclass, but each metaclass (ours and the parent's) |
343 | # has a different set of roles applied. We reconcile this by first |
344 | # reinitializing into the parent class, and _then_ applying our own |
345 | # roles. |
346 | sub _all_metaclasses_differ_by_roles_only { |
347 | my ($self, $super_meta) = @_; |
348 | |
349 | for my $pair ( |
350 | [ ref $self, ref $super_meta ], |
351 | map { [ $self->$_, $super_meta->$_ ] } @MetaClassTypes |
352 | ) { |
353 | |
354 | next if $pair->[0] eq $pair->[1]; |
355 | |
356 | my $self_meta_meta = Class::MOP::Class->initialize( $pair->[0] ); |
357 | my $super_meta_meta = Class::MOP::Class->initialize( $pair->[1] ); |
358 | |
359 | my $common_ancestor |
360 | = _find_common_ancestor( $self_meta_meta, $super_meta_meta ); |
361 | |
362 | return unless $common_ancestor; |
363 | |
364 | return |
365 | unless _is_role_only_subclass_of( |
366 | $self_meta_meta, |
367 | $common_ancestor, |
368 | ) |
369 | && _is_role_only_subclass_of( |
370 | $super_meta_meta, |
371 | $common_ancestor, |
372 | ); |
373 | } |
374 | |
375 | return 1; |
376 | } |
377 | |
378 | # This, and some other functions, could be called as methods, but |
379 | # they're not for two reasons. One, we just end up ignoring the first |
380 | # argument, because we can't call these directly on one of the real |
381 | # arguments, because one of them could be a Class::MOP::Class object |
382 | # and not a Moose::Meta::Class. Second, only a completely insane |
383 | # person would attempt to subclass this stuff! |
384 | sub _find_common_ancestor { |
385 | my ($meta1, $meta2) = @_; |
386 | |
387 | # FIXME? This doesn't account for multiple inheritance (not sure |
388 | # if it needs to though). For example, is somewhere in $meta1's |
db9fda52 |
389 | # history it inherits from both ClassA and ClassB, and $meta2 |
f8b6827f |
390 | # inherits from ClassB & ClassA, does it matter? And what crazy |
391 | # fool would do that anyway? |
392 | |
393 | my %meta1_parents = map { $_ => 1 } $meta1->linearized_isa; |
394 | |
395 | return first { $meta1_parents{$_} } $meta2->linearized_isa; |
396 | } |
397 | |
398 | sub _is_role_only_subclass_of { |
399 | my ($meta, $ancestor) = @_; |
400 | |
401 | return 1 if $meta->name eq $ancestor; |
402 | |
403 | my @roles = _all_roles_until( $meta, $ancestor ); |
404 | |
405 | my %role_packages = map { $_->name => 1 } @roles; |
406 | |
407 | my $ancestor_meta = Class::MOP::Class->initialize($ancestor); |
408 | |
409 | my %shared_ancestors = map { $_ => 1 } $ancestor_meta->linearized_isa; |
410 | |
411 | for my $method ( $meta->get_all_methods() ) { |
412 | next if $method->name eq 'meta'; |
413 | next if $method->can('associated_attribute'); |
414 | |
415 | next |
416 | if $role_packages{ $method->original_package_name } |
417 | || $shared_ancestors{ $method->original_package_name }; |
418 | |
419 | return 0; |
420 | } |
421 | |
422 | # FIXME - this really isn't right. Just because an attribute is |
423 | # defined in a role doesn't mean it isn't _also_ defined in the |
424 | # subclass. |
425 | for my $attr ( $meta->get_all_attributes ) { |
426 | next if $shared_ancestors{ $attr->associated_class->name }; |
427 | |
428 | next if any { $_->has_attribute( $attr->name ) } @roles; |
429 | |
430 | return 0; |
431 | } |
432 | |
433 | return 1; |
434 | } |
435 | |
436 | sub _all_roles { |
437 | my $meta = shift; |
438 | |
439 | return _all_roles_until($meta); |
440 | } |
441 | |
442 | sub _all_roles_until { |
443 | my ($meta, $stop_at_class) = @_; |
444 | |
445 | return unless $meta->can('calculate_all_roles'); |
446 | |
447 | my @roles = $meta->calculate_all_roles; |
448 | |
449 | for my $class ( $meta->linearized_isa ) { |
450 | last if $stop_at_class && $stop_at_class eq $class; |
451 | |
452 | my $meta = Class::MOP::Class->initialize($class); |
453 | last unless $meta->can('calculate_all_roles'); |
454 | |
455 | push @roles, $meta->calculate_all_roles; |
456 | } |
457 | |
8b1d510f |
458 | return uniq @roles; |
f8b6827f |
459 | } |
460 | |
461 | sub _reconcile_role_differences { |
462 | my ($self, $super_meta) = @_; |
463 | |
3897e146 |
464 | my $self_meta = Class::MOP::class_of($self); |
f8b6827f |
465 | |
466 | my %roles; |
467 | |
468 | if ( my @roles = map { $_->name } _all_roles($self_meta) ) { |
469 | $roles{metaclass_roles} = \@roles; |
470 | } |
471 | |
472 | for my $thing (@MetaClassTypes) { |
473 | my $name = $self->$thing(); |
474 | |
475 | my $thing_meta = Class::MOP::Class->initialize($name); |
476 | |
477 | my @roles = map { $_->name } _all_roles($thing_meta) |
478 | or next; |
479 | |
480 | $roles{ $thing . '_roles' } = \@roles; |
481 | } |
482 | |
2b72f3b4 |
483 | $self->_reinitialize_with($super_meta); |
f8b6827f |
484 | |
485 | Moose::Util::MetaRole::apply_metaclass_roles( |
486 | for_class => $self->name, |
487 | %roles, |
488 | ); |
489 | |
490 | return $self; |
491 | } |
492 | |
1341f10c |
493 | sub _process_attribute { |
a3738e5b |
494 | my ( $self, $name, @args ) = @_; |
7e59b803 |
495 | |
496 | @args = %{$args[0]} if scalar @args == 1 && ref($args[0]) eq 'HASH'; |
d9bb6c63 |
497 | |
f9b5f5f8 |
498 | if (($name || '') =~ /^\+(.*)/) { |
7e59b803 |
499 | return $self->_process_inherited_attribute($1, @args); |
1341f10c |
500 | } |
501 | else { |
7e59b803 |
502 | return $self->_process_new_attribute($name, @args); |
503 | } |
504 | } |
505 | |
506 | sub _process_new_attribute { |
507 | my ( $self, $name, @args ) = @_; |
7e59b803 |
508 | |
d5c30e52 |
509 | $self->attribute_metaclass->interpolate_class_and_new($name, @args); |
1341f10c |
510 | } |
511 | |
512 | sub _process_inherited_attribute { |
513 | my ($self, $attr_name, %options) = @_; |
514 | my $inherited_attr = $self->find_attribute_by_name($attr_name); |
515 | (defined $inherited_attr) |
329c5dd4 |
516 | || $self->throw_error("Could not find an attribute by the name of '$attr_name' to inherit from in ${\$self->name}", data => $attr_name); |
1341f10c |
517 | if ($inherited_attr->isa('Moose::Meta::Attribute')) { |
d7d8a8c7 |
518 | return $inherited_attr->clone_and_inherit_options(%options); |
1341f10c |
519 | } |
520 | else { |
521 | # NOTE: |
522 | # kind of a kludge to handle Class::MOP::Attributes |
d7d8a8c7 |
523 | return $inherited_attr->Moose::Meta::Attribute::clone_and_inherit_options(%options); |
ac2dc464 |
524 | } |
1341f10c |
525 | } |
526 | |
5cf3dbcf |
527 | ## ------------------------------------------------- |
528 | |
529 | use Moose::Meta::Method::Constructor; |
1f779926 |
530 | use Moose::Meta::Method::Destructor; |
5cf3dbcf |
531 | |
ac2dc464 |
532 | |
70695d9c |
533 | sub _default_immutable_transformer_options { |
ac2dc464 |
534 | my $self = shift; |
70695d9c |
535 | |
536 | my %options = $self->SUPER::_default_immutable_transformer_options; |
537 | |
538 | # We need to copy the references as we do not want to alter the |
539 | # superclass's references. |
540 | $options{cannot_call} = [ @{ $options{cannot_call} }, 'add_role' ]; |
541 | $options{memoize} = { |
542 | %{ $options{memoize} }, |
543 | calculate_all_roles => 'ARRAY', |
544 | }; |
545 | |
546 | %options = ( |
547 | %options, |
548 | constructor_class => $self->constructor_class, |
549 | destructor_class => $self->destructor_class, |
550 | inline_destructor => 1, |
551 | |
552 | # Moose always does this when an attribute is created |
553 | inline_accessors => 0, |
554 | ); |
555 | |
556 | return %options |
5cf3dbcf |
557 | } |
558 | |
bf6fa6b3 |
559 | our $error_level; |
11c86f15 |
560 | |
561 | sub throw_error { |
562 | my ( $self, @args ) = @_; |
bf6fa6b3 |
563 | local $error_level = ($error_level || 0) + 1; |
11c86f15 |
564 | $self->raise_error($self->create_error(@args)); |
565 | } |
566 | |
567 | sub raise_error { |
568 | my ( $self, @args ) = @_; |
569 | die @args; |
570 | } |
571 | |
572 | sub create_error { |
573 | my ( $self, @args ) = @_; |
574 | |
18748ad6 |
575 | require Carp::Heavy; |
576 | |
bf6fa6b3 |
577 | local $error_level = ($error_level || 0 ) + 1; |
18748ad6 |
578 | |
11c86f15 |
579 | if ( @args % 2 == 1 ) { |
580 | unshift @args, "message"; |
581 | } |
582 | |
fcab1742 |
583 | my %args = ( metaclass => $self, last_error => $@, @args ); |
11c86f15 |
584 | |
bf6fa6b3 |
585 | $args{depth} += $error_level; |
11c86f15 |
586 | |
bf6fa6b3 |
587 | my $class = ref $self ? $self->error_class : "Moose::Error::Default"; |
11c86f15 |
588 | |
a810a01f |
589 | Class::MOP::load_class($class); |
590 | |
11c86f15 |
591 | $class->new( |
bf6fa6b3 |
592 | Carp::caller_info($args{depth}), |
593 | %args |
11c86f15 |
594 | ); |
595 | } |
596 | |
c0e30cf5 |
597 | 1; |
598 | |
599 | __END__ |
600 | |
601 | =pod |
602 | |
603 | =head1 NAME |
604 | |
e522431d |
605 | Moose::Meta::Class - The Moose metaclass |
c0e30cf5 |
606 | |
c0e30cf5 |
607 | =head1 DESCRIPTION |
608 | |
70bb0f97 |
609 | This class is a subclass of L<Class::MOP::Class> that provides |
610 | additional Moose-specific functionality. |
e522431d |
611 | |
7854b409 |
612 | To really understand this class, you will need to start with the |
613 | L<Class::MOP::Class> documentation. This class can be understood as a |
614 | set of additional features on top of the basic feature provided by |
615 | that parent class. |
6ba6d68c |
616 | |
d4b1449e |
617 | =head1 INHERITANCE |
618 | |
619 | C<Moose::Meta::Class> is a subclass of L<Class::MOP::Class>. |
620 | |
c0e30cf5 |
621 | =head1 METHODS |
622 | |
623 | =over 4 |
624 | |
70bb0f97 |
625 | =item B<< Moose::Meta::Class->initialize($package_name, %options) >> |
590868a3 |
626 | |
70bb0f97 |
627 | This overrides the parent's method in order to provide its own |
628 | defaults for the C<attribute_metaclass>, C<instance_metaclass>, and |
629 | C<method_metaclass> options. |
61bdd94f |
630 | |
70bb0f97 |
631 | These all default to the appropriate Moose class. |
61bdd94f |
632 | |
70bb0f97 |
633 | =item B<< Moose::Meta::Class->create($package_name, %options) >> |
17594769 |
634 | |
70bb0f97 |
635 | This overrides the parent's method in order to accept a C<roles> |
636 | option. This should be an array reference containing one more roles |
637 | that the class does. |
17594769 |
638 | |
70bb0f97 |
639 | my $metaclass = Moose::Meta::Class->create( 'New::Class', roles => [...] ); |
17594769 |
640 | |
70bb0f97 |
641 | =item B<< Moose::Meta::Class->create_anon_class >> |
17594769 |
642 | |
70bb0f97 |
643 | This overrides the parent's method to accept a C<roles> option, just |
644 | as C<create> does. |
5cf3dbcf |
645 | |
70bb0f97 |
646 | It also accepts a C<cache> option. If this is true, then the anonymous |
647 | class will be cached based on its superclasses and roles. If an |
648 | existing anonymous class in the cache has the same superclasses and |
649 | roles, it will be reused. |
ac2dc464 |
650 | |
70bb0f97 |
651 | my $metaclass = Moose::Meta::Class->create_anon_class( |
652 | superclasses => ['Foo'], |
653 | roles => [qw/Some Roles Go Here/], |
654 | cache => 1, |
655 | ); |
ac2dc464 |
656 | |
70bb0f97 |
657 | =item B<< $metaclass->make_immutable(%options) >> |
ac2dc464 |
658 | |
70bb0f97 |
659 | This overrides the parent's method to add a few options. Specifically, |
660 | it uses the Moose-specific constructor and destructor classes, and |
661 | enables inlining the destructor. |
8c9d74e7 |
662 | |
70bb0f97 |
663 | Also, since Moose always inlines attributes, it sets the |
664 | C<inline_accessors> option to false. |
02a0fb52 |
665 | |
70bb0f97 |
666 | =item B<< $metaclass->new_object(%params) >> |
a15dff8d |
667 | |
70bb0f97 |
668 | This overrides the parent's method in order to add support for |
669 | attribute triggers. |
6ba6d68c |
670 | |
70bb0f97 |
671 | =item B<< $metaclass->add_override_method_modifier($name, $sub) >> |
ef1d5f4b |
672 | |
70bb0f97 |
673 | This adds an C<override> method modifier to the package. |
e9ec68d6 |
674 | |
70bb0f97 |
675 | =item B<< $metaclass->add_augment_method_modifier($name, $sub) >> |
e9ec68d6 |
676 | |
70bb0f97 |
677 | This adds an C<augment> method modifier to the package. |
78cd1d3b |
678 | |
70bb0f97 |
679 | =item B<< $metaclass->calculate_all_roles >> |
02a0fb52 |
680 | |
70bb0f97 |
681 | This will return a unique array of C<Moose::Meta::Role> instances |
682 | which are attached to this class. |
78cd1d3b |
683 | |
70bb0f97 |
684 | =item B<< $metaclass->add_role($role) >> |
02a0fb52 |
685 | |
70bb0f97 |
686 | This takes a L<Moose::Meta::Role> object, and adds it to the class's |
687 | list of roles. This I<does not> actually apply the role to the class. |
2b14ac61 |
688 | |
70bb0f97 |
689 | =item B<< $metaclass->does_role($role_name) >> |
ef333f17 |
690 | |
70bb0f97 |
691 | This returns a boolean indicating whether or not the class does the |
692 | specified role. This tests both the class and its parents. |
02a0fb52 |
693 | |
70bb0f97 |
694 | =item B<< $metaclass->excludes_role($role_name) >> |
ef333f17 |
695 | |
70bb0f97 |
696 | A class excludes a role if it has already composed a role which |
697 | excludes the named role. This tests both the class and its parents. |
02a0fb52 |
698 | |
70bb0f97 |
699 | =item B<< $metaclass->add_attribute($attr_name, %params|$params) >> |
ef333f17 |
700 | |
70bb0f97 |
701 | This overrides the parent's method in order to allow the parameters to |
702 | be provided as a hash reference. |
02a0fb52 |
703 | |
70bb0f97 |
704 | =item B<< $metaclass->constructor_class ($class_name) >> |
d79e62fd |
705 | |
70bb0f97 |
706 | =item B<< $metaclass->destructor_class ($class_name) >> |
e606ae5f |
707 | |
708 | These are the names of classes used when making a class |
709 | immutable. These default to L<Moose::Meta::Method::Constructor> and |
710 | L<Moose::Meta::Method::Destructor> respectively. These accessors are |
711 | read-write, so you can use them to change the class name. |
712 | |
70bb0f97 |
713 | =item B<< $metaclass->error_class($class_name) >> |
8b1d510f |
714 | |
70bb0f97 |
715 | The name of the class used to throw errors. This defaults to |
8b1d510f |
716 | L<Moose::Error::Default>, which generates an error with a stacktrace |
717 | just like C<Carp::confess>. |
718 | |
70bb0f97 |
719 | =item B<< $metaclass->throw_error($message, %extra) >> |
11c86f15 |
720 | |
721 | Throws the error created by C<create_error> using C<raise_error> |
722 | |
c0e30cf5 |
723 | =back |
724 | |
725 | =head1 BUGS |
726 | |
ac2dc464 |
727 | All complex software has bugs lurking in it, and this module is no |
c0e30cf5 |
728 | exception. If you find a bug please either email me, or add the bug |
729 | to cpan-RT. |
730 | |
c0e30cf5 |
731 | =head1 AUTHOR |
732 | |
733 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
734 | |
735 | =head1 COPYRIGHT AND LICENSE |
736 | |
2840a3b2 |
737 | Copyright 2006-2009 by Infinity Interactive, Inc. |
c0e30cf5 |
738 | |
739 | L<http://www.iinteractive.com> |
740 | |
741 | This library is free software; you can redistribute it and/or modify |
ac2dc464 |
742 | it under the same terms as Perl itself. |
c0e30cf5 |
743 | |
8a7a9c53 |
744 | =cut |
1a563243 |
745 | |