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) = @_; |
ebfc4d0f |
140 | |
d79e62fd |
141 | (defined $role_name) |
11c86f15 |
142 | || $self->throw_error("You must supply a role name to look for"); |
ebfc4d0f |
143 | |
ac2dc464 |
144 | foreach my $class ($self->class_precedence_list) { |
ebfc4d0f |
145 | my $meta = Class::MOP::class_of($class); |
146 | # when a Moose metaclass is itself extended with a role, |
147 | # this check needs to be done since some items in the |
148 | # class_precedence_list might in fact be Class::MOP |
149 | # based still. |
150 | next unless $meta && $meta->can('roles'); |
151 | foreach my $role (@{$meta->roles}) { |
9c429218 |
152 | return 1 if $role->excludes_role($role_name); |
153 | } |
d79e62fd |
154 | } |
155 | return 0; |
156 | } |
157 | |
8c9d74e7 |
158 | sub new_object { |
1308deb4 |
159 | my $class = shift; |
e606ae5f |
160 | my $params = @_ == 1 ? $_[0] : {@_}; |
1308deb4 |
161 | my $self = $class->SUPER::new_object($params); |
162 | |
163 | foreach my $attr ( $class->compute_all_applicable_attributes() ) { |
164 | |
165 | next unless $attr->can('has_trigger') && $attr->has_trigger; |
166 | |
167 | my $init_arg = $attr->init_arg; |
168 | |
169 | next unless defined $init_arg; |
170 | |
171 | next unless exists $params->{$init_arg}; |
172 | |
173 | $attr->trigger->( |
174 | $self, |
175 | ( |
176 | $attr->should_coerce |
177 | ? $attr->get_read_method_ref->($self) |
178 | : $params->{$init_arg} |
179 | ), |
180 | $attr |
181 | ); |
8c9d74e7 |
182 | } |
1308deb4 |
183 | |
ac2dc464 |
184 | return $self; |
8c9d74e7 |
185 | } |
186 | |
a15dff8d |
187 | sub construct_instance { |
e606ae5f |
188 | my $class = shift; |
189 | my $params = @_ == 1 ? $_[0] : {@_}; |
ddd0ec20 |
190 | my $meta_instance = $class->get_meta_instance; |
575db57d |
191 | # FIXME: |
192 | # the code below is almost certainly incorrect |
6549b0d1 |
193 | # but this is foreign inheritance, so we might |
ac2dc464 |
194 | # have to kludge it in the end. |
e606ae5f |
195 | my $instance = $params->{'__INSTANCE__'} || $meta_instance->create_instance(); |
ac2dc464 |
196 | foreach my $attr ($class->compute_all_applicable_attributes()) { |
e606ae5f |
197 | $attr->initialize_instance_slot($meta_instance, $instance, $params); |
a15dff8d |
198 | } |
199 | return $instance; |
200 | } |
201 | |
093b12c2 |
202 | ### --------------------------------------------- |
203 | |
a2eec5e7 |
204 | sub add_attribute { |
205 | my $self = shift; |
e472c9a5 |
206 | $self->SUPER::add_attribute( |
207 | (blessed $_[0] && $_[0]->isa('Class::MOP::Attribute') |
208 | ? $_[0] |
209 | : $self->_process_attribute(@_)) |
210 | ); |
a2eec5e7 |
211 | } |
212 | |
78cd1d3b |
213 | sub add_override_method_modifier { |
214 | my ($self, $name, $method, $_super_package) = @_; |
18c2ec0e |
215 | |
d05cd563 |
216 | (!$self->has_method($name)) |
11c86f15 |
217 | || $self->throw_error("Cannot add an override method if a local method is already present"); |
18c2ec0e |
218 | |
74862722 |
219 | $self->add_method($name => Moose::Meta::Method::Overridden->new( |
3f9e4b0a |
220 | method => $method, |
221 | class => $self, |
222 | package => $_super_package, # need this for roles |
223 | name => $name, |
18c2ec0e |
224 | )); |
78cd1d3b |
225 | } |
226 | |
227 | sub add_augment_method_modifier { |
ac2dc464 |
228 | my ($self, $name, $method) = @_; |
d05cd563 |
229 | (!$self->has_method($name)) |
11c86f15 |
230 | || $self->throw_error("Cannot add an augment method if a local method is already present"); |
3f9e4b0a |
231 | |
232 | $self->add_method($name => Moose::Meta::Method::Augmented->new( |
233 | method => $method, |
234 | class => $self, |
235 | name => $name, |
236 | )); |
78cd1d3b |
237 | } |
238 | |
1341f10c |
239 | ## Private Utility methods ... |
240 | |
05d9eaf6 |
241 | sub _find_next_method_by_name_which_is_not_overridden { |
242 | my ($self, $name) = @_; |
68efb014 |
243 | foreach my $method ($self->find_all_methods_by_name($name)) { |
ac2dc464 |
244 | return $method->{code} |
74862722 |
245 | if blessed($method->{code}) && !$method->{code}->isa('Moose::Meta::Method::Overridden'); |
05d9eaf6 |
246 | } |
247 | return undef; |
248 | } |
249 | |
41419b9e |
250 | sub _fix_metaclass_incompatibility { |
1341f10c |
251 | my ($self, @superclasses) = @_; |
e606ae5f |
252 | |
1341f10c |
253 | foreach my $super (@superclasses) { |
f8b6827f |
254 | next if $self->_superclass_meta_is_compatible($super); |
e606ae5f |
255 | |
256 | unless ( $self->is_pristine ) { |
f8b6827f |
257 | $self->throw_error( |
258 | "Cannot attempt to reinitialize metaclass for " |
259 | . $self->name |
260 | . ", it isn't pristine" ); |
1341f10c |
261 | } |
e606ae5f |
262 | |
0635500e |
263 | $self->_reconcile_with_superclass_meta($super); |
f8b6827f |
264 | } |
f8b6827f |
265 | } |
266 | |
267 | sub _superclass_meta_is_compatible { |
268 | my ($self, $super) = @_; |
269 | |
270 | my $super_meta = Class::MOP::Class->initialize($super) |
271 | or return 1; |
272 | |
273 | next unless $super_meta->isa("Class::MOP::Class"); |
274 | |
275 | my $super_meta_name |
276 | = $super_meta->is_immutable |
277 | ? $super_meta->get_mutable_metaclass_name |
278 | : ref($super_meta); |
279 | |
280 | return 1 |
281 | if $self->isa($super_meta_name) |
282 | and |
283 | $self->instance_metaclass->isa( $super_meta->instance_metaclass ); |
284 | } |
285 | |
286 | # I don't want to have to type this >1 time |
287 | my @MetaClassTypes = |
8b1d510f |
288 | qw( attribute_metaclass method_metaclass instance_metaclass |
289 | constructor_class destructor_class error_class ); |
f8b6827f |
290 | |
291 | sub _reconcile_with_superclass_meta { |
292 | my ($self, $super) = @_; |
293 | |
294 | my $super_meta = $super->meta; |
295 | |
dd37a5be |
296 | my $super_meta_name |
f8b6827f |
297 | = $super_meta->is_immutable |
298 | ? $super_meta->get_mutable_metaclass_name |
299 | : ref($super_meta); |
e606ae5f |
300 | |
f8b6827f |
301 | my $self_metaclass = ref $self; |
302 | |
303 | # If neither of these is true we have a more serious |
304 | # incompatibility that we just cannot fix (yet?). |
dd37a5be |
305 | if ( $super_meta_name->isa( ref $self ) |
f8b6827f |
306 | && all { $super_meta->$_->isa( $self->$_ ) } @MetaClassTypes ) { |
0635500e |
307 | $self->_reinitialize_with($super_meta); |
f8b6827f |
308 | } |
309 | elsif ( $self->_all_metaclasses_differ_by_roles_only($super_meta) ) { |
0635500e |
310 | $self->_reconcile_role_differences($super_meta); |
1341f10c |
311 | } |
1341f10c |
312 | } |
313 | |
f8b6827f |
314 | sub _reinitialize_with { |
315 | my ( $self, $new_meta ) = @_; |
316 | |
0635500e |
317 | my $new_self = $new_meta->reinitialize( |
f8b6827f |
318 | $self->name, |
319 | attribute_metaclass => $new_meta->attribute_metaclass, |
320 | method_metaclass => $new_meta->method_metaclass, |
321 | instance_metaclass => $new_meta->instance_metaclass, |
322 | ); |
323 | |
8b1d510f |
324 | $new_self->$_( $new_meta->$_ ) |
325 | for qw( constructor_class destructor_class error_class ); |
f8b6827f |
326 | |
0635500e |
327 | %$self = %$new_self; |
328 | |
329 | bless $self, ref $new_self; |
330 | |
4c5fcc12 |
331 | # We need to replace the cached metaclass instance or else when it |
332 | # goes out of scope Class::MOP::Class destroy's the namespace for |
333 | # the metaclass's class, causing much havoc. |
0635500e |
334 | Class::MOP::store_metaclass_by_name( $self->name, $self ); |
4c5fcc12 |
335 | Class::MOP::weaken_metaclass( $self->name ) if $self->is_anon_class; |
f8b6827f |
336 | } |
337 | |
338 | # In the more complex case, we share a common ancestor with our |
339 | # superclass's metaclass, but each metaclass (ours and the parent's) |
340 | # has a different set of roles applied. We reconcile this by first |
341 | # reinitializing into the parent class, and _then_ applying our own |
342 | # roles. |
343 | sub _all_metaclasses_differ_by_roles_only { |
344 | my ($self, $super_meta) = @_; |
345 | |
346 | for my $pair ( |
347 | [ ref $self, ref $super_meta ], |
348 | map { [ $self->$_, $super_meta->$_ ] } @MetaClassTypes |
349 | ) { |
350 | |
351 | next if $pair->[0] eq $pair->[1]; |
352 | |
353 | my $self_meta_meta = Class::MOP::Class->initialize( $pair->[0] ); |
354 | my $super_meta_meta = Class::MOP::Class->initialize( $pair->[1] ); |
355 | |
356 | my $common_ancestor |
357 | = _find_common_ancestor( $self_meta_meta, $super_meta_meta ); |
358 | |
359 | return unless $common_ancestor; |
360 | |
361 | return |
362 | unless _is_role_only_subclass_of( |
363 | $self_meta_meta, |
364 | $common_ancestor, |
365 | ) |
366 | && _is_role_only_subclass_of( |
367 | $super_meta_meta, |
368 | $common_ancestor, |
369 | ); |
370 | } |
371 | |
372 | return 1; |
373 | } |
374 | |
375 | # This, and some other functions, could be called as methods, but |
376 | # they're not for two reasons. One, we just end up ignoring the first |
377 | # argument, because we can't call these directly on one of the real |
378 | # arguments, because one of them could be a Class::MOP::Class object |
379 | # and not a Moose::Meta::Class. Second, only a completely insane |
380 | # person would attempt to subclass this stuff! |
381 | sub _find_common_ancestor { |
382 | my ($meta1, $meta2) = @_; |
383 | |
384 | # FIXME? This doesn't account for multiple inheritance (not sure |
385 | # if it needs to though). For example, is somewhere in $meta1's |
db9fda52 |
386 | # history it inherits from both ClassA and ClassB, and $meta2 |
f8b6827f |
387 | # inherits from ClassB & ClassA, does it matter? And what crazy |
388 | # fool would do that anyway? |
389 | |
390 | my %meta1_parents = map { $_ => 1 } $meta1->linearized_isa; |
391 | |
392 | return first { $meta1_parents{$_} } $meta2->linearized_isa; |
393 | } |
394 | |
395 | sub _is_role_only_subclass_of { |
396 | my ($meta, $ancestor) = @_; |
397 | |
398 | return 1 if $meta->name eq $ancestor; |
399 | |
400 | my @roles = _all_roles_until( $meta, $ancestor ); |
401 | |
402 | my %role_packages = map { $_->name => 1 } @roles; |
403 | |
404 | my $ancestor_meta = Class::MOP::Class->initialize($ancestor); |
405 | |
406 | my %shared_ancestors = map { $_ => 1 } $ancestor_meta->linearized_isa; |
407 | |
408 | for my $method ( $meta->get_all_methods() ) { |
409 | next if $method->name eq 'meta'; |
410 | next if $method->can('associated_attribute'); |
411 | |
412 | next |
413 | if $role_packages{ $method->original_package_name } |
414 | || $shared_ancestors{ $method->original_package_name }; |
415 | |
416 | return 0; |
417 | } |
418 | |
419 | # FIXME - this really isn't right. Just because an attribute is |
420 | # defined in a role doesn't mean it isn't _also_ defined in the |
421 | # subclass. |
422 | for my $attr ( $meta->get_all_attributes ) { |
423 | next if $shared_ancestors{ $attr->associated_class->name }; |
424 | |
425 | next if any { $_->has_attribute( $attr->name ) } @roles; |
426 | |
427 | return 0; |
428 | } |
429 | |
430 | return 1; |
431 | } |
432 | |
433 | sub _all_roles { |
434 | my $meta = shift; |
435 | |
436 | return _all_roles_until($meta); |
437 | } |
438 | |
439 | sub _all_roles_until { |
440 | my ($meta, $stop_at_class) = @_; |
441 | |
442 | return unless $meta->can('calculate_all_roles'); |
443 | |
444 | my @roles = $meta->calculate_all_roles; |
445 | |
446 | for my $class ( $meta->linearized_isa ) { |
447 | last if $stop_at_class && $stop_at_class eq $class; |
448 | |
449 | my $meta = Class::MOP::Class->initialize($class); |
450 | last unless $meta->can('calculate_all_roles'); |
451 | |
452 | push @roles, $meta->calculate_all_roles; |
453 | } |
454 | |
8b1d510f |
455 | return uniq @roles; |
f8b6827f |
456 | } |
457 | |
458 | sub _reconcile_role_differences { |
459 | my ($self, $super_meta) = @_; |
460 | |
461 | my $self_meta = $self->meta; |
462 | |
463 | my %roles; |
464 | |
465 | if ( my @roles = map { $_->name } _all_roles($self_meta) ) { |
466 | $roles{metaclass_roles} = \@roles; |
467 | } |
468 | |
469 | for my $thing (@MetaClassTypes) { |
470 | my $name = $self->$thing(); |
471 | |
472 | my $thing_meta = Class::MOP::Class->initialize($name); |
473 | |
474 | my @roles = map { $_->name } _all_roles($thing_meta) |
475 | or next; |
476 | |
477 | $roles{ $thing . '_roles' } = \@roles; |
478 | } |
479 | |
2b72f3b4 |
480 | $self->_reinitialize_with($super_meta); |
f8b6827f |
481 | |
482 | Moose::Util::MetaRole::apply_metaclass_roles( |
483 | for_class => $self->name, |
484 | %roles, |
485 | ); |
486 | |
487 | return $self; |
488 | } |
489 | |
d7d8a8c7 |
490 | # NOTE: |
d9bb6c63 |
491 | # this was crap anyway, see |
492 | # Moose::Util::apply_all_roles |
d7d8a8c7 |
493 | # instead |
4498537c |
494 | sub _apply_all_roles { |
547dda77 |
495 | Carp::croak 'DEPRECATED: use Moose::Util::apply_all_roles($meta, @roles) instead' |
4498537c |
496 | } |
1341f10c |
497 | |
498 | sub _process_attribute { |
a3738e5b |
499 | my ( $self, $name, @args ) = @_; |
7e59b803 |
500 | |
501 | @args = %{$args[0]} if scalar @args == 1 && ref($args[0]) eq 'HASH'; |
d9bb6c63 |
502 | |
f9b5f5f8 |
503 | if (($name || '') =~ /^\+(.*)/) { |
7e59b803 |
504 | return $self->_process_inherited_attribute($1, @args); |
1341f10c |
505 | } |
506 | else { |
7e59b803 |
507 | return $self->_process_new_attribute($name, @args); |
508 | } |
509 | } |
510 | |
511 | sub _process_new_attribute { |
512 | my ( $self, $name, @args ) = @_; |
7e59b803 |
513 | |
d5c30e52 |
514 | $self->attribute_metaclass->interpolate_class_and_new($name, @args); |
1341f10c |
515 | } |
516 | |
517 | sub _process_inherited_attribute { |
518 | my ($self, $attr_name, %options) = @_; |
519 | my $inherited_attr = $self->find_attribute_by_name($attr_name); |
520 | (defined $inherited_attr) |
329c5dd4 |
521 | || $self->throw_error("Could not find an attribute by the name of '$attr_name' to inherit from in ${\$self->name}", data => $attr_name); |
1341f10c |
522 | if ($inherited_attr->isa('Moose::Meta::Attribute')) { |
d7d8a8c7 |
523 | return $inherited_attr->clone_and_inherit_options(%options); |
1341f10c |
524 | } |
525 | else { |
526 | # NOTE: |
527 | # kind of a kludge to handle Class::MOP::Attributes |
d7d8a8c7 |
528 | return $inherited_attr->Moose::Meta::Attribute::clone_and_inherit_options(%options); |
ac2dc464 |
529 | } |
1341f10c |
530 | } |
531 | |
5cf3dbcf |
532 | ## ------------------------------------------------- |
533 | |
534 | use Moose::Meta::Method::Constructor; |
1f779926 |
535 | use Moose::Meta::Method::Destructor; |
5cf3dbcf |
536 | |
ac2dc464 |
537 | |
70695d9c |
538 | sub _default_immutable_transformer_options { |
ac2dc464 |
539 | my $self = shift; |
70695d9c |
540 | |
541 | my %options = $self->SUPER::_default_immutable_transformer_options; |
542 | |
543 | # We need to copy the references as we do not want to alter the |
544 | # superclass's references. |
545 | $options{cannot_call} = [ @{ $options{cannot_call} }, 'add_role' ]; |
546 | $options{memoize} = { |
547 | %{ $options{memoize} }, |
548 | calculate_all_roles => 'ARRAY', |
549 | }; |
550 | |
551 | %options = ( |
552 | %options, |
553 | constructor_class => $self->constructor_class, |
554 | destructor_class => $self->destructor_class, |
555 | inline_destructor => 1, |
556 | |
557 | # Moose always does this when an attribute is created |
558 | inline_accessors => 0, |
559 | ); |
560 | |
561 | return %options |
5cf3dbcf |
562 | } |
563 | |
bf6fa6b3 |
564 | our $error_level; |
11c86f15 |
565 | |
566 | sub throw_error { |
567 | my ( $self, @args ) = @_; |
bf6fa6b3 |
568 | local $error_level = ($error_level || 0) + 1; |
11c86f15 |
569 | $self->raise_error($self->create_error(@args)); |
570 | } |
571 | |
572 | sub raise_error { |
573 | my ( $self, @args ) = @_; |
574 | die @args; |
575 | } |
576 | |
577 | sub create_error { |
578 | my ( $self, @args ) = @_; |
579 | |
18748ad6 |
580 | require Carp::Heavy; |
581 | |
bf6fa6b3 |
582 | local $error_level = ($error_level || 0 ) + 1; |
18748ad6 |
583 | |
11c86f15 |
584 | if ( @args % 2 == 1 ) { |
585 | unshift @args, "message"; |
586 | } |
587 | |
fcab1742 |
588 | my %args = ( metaclass => $self, last_error => $@, @args ); |
11c86f15 |
589 | |
bf6fa6b3 |
590 | $args{depth} += $error_level; |
11c86f15 |
591 | |
bf6fa6b3 |
592 | my $class = ref $self ? $self->error_class : "Moose::Error::Default"; |
11c86f15 |
593 | |
a810a01f |
594 | Class::MOP::load_class($class); |
595 | |
11c86f15 |
596 | $class->new( |
bf6fa6b3 |
597 | Carp::caller_info($args{depth}), |
598 | %args |
11c86f15 |
599 | ); |
600 | } |
601 | |
c0e30cf5 |
602 | 1; |
603 | |
604 | __END__ |
605 | |
606 | =pod |
607 | |
608 | =head1 NAME |
609 | |
e522431d |
610 | Moose::Meta::Class - The Moose metaclass |
c0e30cf5 |
611 | |
c0e30cf5 |
612 | =head1 DESCRIPTION |
613 | |
70bb0f97 |
614 | This class is a subclass of L<Class::MOP::Class> that provides |
615 | additional Moose-specific functionality. |
e522431d |
616 | |
7854b409 |
617 | To really understand this class, you will need to start with the |
618 | L<Class::MOP::Class> documentation. This class can be understood as a |
619 | set of additional features on top of the basic feature provided by |
620 | that parent class. |
6ba6d68c |
621 | |
d4b1449e |
622 | =head1 INHERITANCE |
623 | |
624 | C<Moose::Meta::Class> is a subclass of L<Class::MOP::Class>. |
625 | |
c0e30cf5 |
626 | =head1 METHODS |
627 | |
628 | =over 4 |
629 | |
70bb0f97 |
630 | =item B<< Moose::Meta::Class->initialize($package_name, %options) >> |
590868a3 |
631 | |
70bb0f97 |
632 | This overrides the parent's method in order to provide its own |
633 | defaults for the C<attribute_metaclass>, C<instance_metaclass>, and |
634 | C<method_metaclass> options. |
61bdd94f |
635 | |
70bb0f97 |
636 | These all default to the appropriate Moose class. |
61bdd94f |
637 | |
70bb0f97 |
638 | =item B<< Moose::Meta::Class->create($package_name, %options) >> |
17594769 |
639 | |
70bb0f97 |
640 | This overrides the parent's method in order to accept a C<roles> |
641 | option. This should be an array reference containing one more roles |
642 | that the class does. |
17594769 |
643 | |
70bb0f97 |
644 | my $metaclass = Moose::Meta::Class->create( 'New::Class', roles => [...] ); |
17594769 |
645 | |
70bb0f97 |
646 | =item B<< Moose::Meta::Class->create_anon_class >> |
17594769 |
647 | |
70bb0f97 |
648 | This overrides the parent's method to accept a C<roles> option, just |
649 | as C<create> does. |
5cf3dbcf |
650 | |
70bb0f97 |
651 | It also accepts a C<cache> option. If this is true, then the anonymous |
652 | class will be cached based on its superclasses and roles. If an |
653 | existing anonymous class in the cache has the same superclasses and |
654 | roles, it will be reused. |
ac2dc464 |
655 | |
70bb0f97 |
656 | my $metaclass = Moose::Meta::Class->create_anon_class( |
657 | superclasses => ['Foo'], |
658 | roles => [qw/Some Roles Go Here/], |
659 | cache => 1, |
660 | ); |
ac2dc464 |
661 | |
70bb0f97 |
662 | =item B<< $metaclass->make_immutable(%options) >> |
ac2dc464 |
663 | |
70bb0f97 |
664 | This overrides the parent's method to add a few options. Specifically, |
665 | it uses the Moose-specific constructor and destructor classes, and |
666 | enables inlining the destructor. |
8c9d74e7 |
667 | |
70bb0f97 |
668 | Also, since Moose always inlines attributes, it sets the |
669 | C<inline_accessors> option to false. |
02a0fb52 |
670 | |
70bb0f97 |
671 | =item B<< $metaclass->new_object(%params) >> |
a15dff8d |
672 | |
70bb0f97 |
673 | This overrides the parent's method in order to add support for |
674 | attribute triggers. |
6ba6d68c |
675 | |
70bb0f97 |
676 | =item B<< $metaclass->add_override_method_modifier($name, $sub) >> |
ef1d5f4b |
677 | |
70bb0f97 |
678 | This adds an C<override> method modifier to the package. |
e9ec68d6 |
679 | |
70bb0f97 |
680 | =item B<< $metaclass->add_augment_method_modifier($name, $sub) >> |
e9ec68d6 |
681 | |
70bb0f97 |
682 | This adds an C<augment> method modifier to the package. |
78cd1d3b |
683 | |
70bb0f97 |
684 | =item B<< $metaclass->calculate_all_roles >> |
02a0fb52 |
685 | |
70bb0f97 |
686 | This will return a unique array of C<Moose::Meta::Role> instances |
687 | which are attached to this class. |
78cd1d3b |
688 | |
70bb0f97 |
689 | =item B<< $metaclass->add_role($role) >> |
02a0fb52 |
690 | |
70bb0f97 |
691 | This takes a L<Moose::Meta::Role> object, and adds it to the class's |
692 | list of roles. This I<does not> actually apply the role to the class. |
2b14ac61 |
693 | |
70bb0f97 |
694 | =item B<< $metaclass->does_role($role_name) >> |
ef333f17 |
695 | |
70bb0f97 |
696 | This returns a boolean indicating whether or not the class does the |
697 | specified role. This tests both the class and its parents. |
02a0fb52 |
698 | |
70bb0f97 |
699 | =item B<< $metaclass->excludes_role($role_name) >> |
ef333f17 |
700 | |
70bb0f97 |
701 | A class excludes a role if it has already composed a role which |
702 | excludes the named role. This tests both the class and its parents. |
02a0fb52 |
703 | |
70bb0f97 |
704 | =item B<< $metaclass->add_attribute($attr_name, %params|$params) >> |
ef333f17 |
705 | |
70bb0f97 |
706 | This overrides the parent's method in order to allow the parameters to |
707 | be provided as a hash reference. |
02a0fb52 |
708 | |
70bb0f97 |
709 | =item B<< $metaclass->constructor_class ($class_name) >> |
d79e62fd |
710 | |
70bb0f97 |
711 | =item B<< $metaclass->destructor_class ($class_name) >> |
e606ae5f |
712 | |
713 | These are the names of classes used when making a class |
714 | immutable. These default to L<Moose::Meta::Method::Constructor> and |
715 | L<Moose::Meta::Method::Destructor> respectively. These accessors are |
716 | read-write, so you can use them to change the class name. |
717 | |
70bb0f97 |
718 | =item B<< $metaclass->error_class($class_name) >> |
8b1d510f |
719 | |
70bb0f97 |
720 | The name of the class used to throw errors. This defaults to |
8b1d510f |
721 | L<Moose::Error::Default>, which generates an error with a stacktrace |
722 | just like C<Carp::confess>. |
723 | |
70bb0f97 |
724 | =item B<< $metaclass->throw_error($message, %extra) >> |
11c86f15 |
725 | |
726 | Throws the error created by C<create_error> using C<raise_error> |
727 | |
c0e30cf5 |
728 | =back |
729 | |
730 | =head1 BUGS |
731 | |
ac2dc464 |
732 | All complex software has bugs lurking in it, and this module is no |
c0e30cf5 |
733 | exception. If you find a bug please either email me, or add the bug |
734 | to cpan-RT. |
735 | |
c0e30cf5 |
736 | =head1 AUTHOR |
737 | |
738 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
739 | |
740 | =head1 COPYRIGHT AND LICENSE |
741 | |
2840a3b2 |
742 | Copyright 2006-2009 by Infinity Interactive, Inc. |
c0e30cf5 |
743 | |
744 | L<http://www.iinteractive.com> |
745 | |
746 | This library is free software; you can redistribute it and/or modify |
ac2dc464 |
747 | it under the same terms as Perl itself. |
c0e30cf5 |
748 | |
8a7a9c53 |
749 | =cut |
1a563243 |
750 | |