Commit | Line | Data |
9a641848 |
1 | package Moose::Util; |
2 | |
9a641848 |
3 | use strict; |
4 | use warnings; |
5 | |
b5ae7c00 |
6 | use Class::Load qw(load_class load_first_existing_class); |
c01f48b7 |
7 | use Data::OptList; |
88e88a7b |
8 | use Params::Util qw( _STRING ); |
7125b244 |
9 | use Sub::Exporter; |
d7d8a8c7 |
10 | use Scalar::Util 'blessed'; |
d2782813 |
11 | use List::Util qw(first); |
12 | use List::MoreUtils qw(any all); |
5394a1c7 |
13 | use overload (); |
094b6ec9 |
14 | use Try::Tiny; |
38bf2a25 |
15 | use Class::MOP; |
9a641848 |
16 | |
7125b244 |
17 | my @exports = qw[ |
d03bd989 |
18 | find_meta |
6532ca5a |
19 | does_role |
d03bd989 |
20 | search_class_by_role |
b099a649 |
21 | ensure_all_roles |
d7d8a8c7 |
22 | apply_all_roles |
d26f5671 |
23 | with_traits |
ab76842e |
24 | get_all_init_args |
25 | get_all_attribute_values |
a5e883ae |
26 | resolve_metatrait_alias |
27 | resolve_metaclass_alias |
5f71050b |
28 | add_method_modifier |
d939e016 |
29 | english_list |
27f2f43f |
30 | meta_attribute_alias |
31 | meta_class_alias |
7125b244 |
32 | ]; |
9a641848 |
33 | |
7125b244 |
34 | Sub::Exporter::setup_exporter({ |
35 | exports => \@exports, |
11065d1f |
36 | groups => { all => \@exports } |
7125b244 |
37 | }); |
38 | |
39 | ## some utils for the utils ... |
40 | |
56ea1a11 |
41 | sub find_meta { Class::MOP::class_of(@_) } |
9a641848 |
42 | |
7125b244 |
43 | ## the functions ... |
adf82331 |
44 | |
7125b244 |
45 | sub does_role { |
46 | my ($class_or_obj, $role) = @_; |
adf82331 |
47 | |
43781cc3 |
48 | if (try { $class_or_obj->isa('Moose::Object') }) { |
094b6ec9 |
49 | return $class_or_obj->does($role); |
50 | } |
51 | |
6532ca5a |
52 | my $meta = find_meta($class_or_obj); |
d03bd989 |
53 | |
7125b244 |
54 | return unless defined $meta; |
10a745f5 |
55 | return unless $meta->can('does_role'); |
7125b244 |
56 | return 1 if $meta->does_role($role); |
57 | return; |
9a641848 |
58 | } |
59 | |
1631b53f |
60 | sub search_class_by_role { |
560c498d |
61 | my ($class_or_obj, $role) = @_; |
d03bd989 |
62 | |
6532ca5a |
63 | my $meta = find_meta($class_or_obj); |
7125b244 |
64 | |
65 | return unless defined $meta; |
66 | |
560c498d |
67 | my $role_name = blessed $role ? $role->name : $role; |
68 | |
7125b244 |
69 | foreach my $class ($meta->class_precedence_list) { |
d03bd989 |
70 | |
71 | my $_meta = find_meta($class); |
1631b53f |
72 | |
7125b244 |
73 | next unless defined $_meta; |
74 | |
75 | foreach my $role (@{ $_meta->roles || [] }) { |
1631b53f |
76 | return $class if $role->name eq $role_name; |
77 | } |
78 | } |
79 | |
7125b244 |
80 | return; |
1631b53f |
81 | } |
82 | |
b099a649 |
83 | # this can possibly behave in unexpected ways because the roles being composed |
84 | # before being applied could differ from call to call; I'm not sure if or how |
85 | # to document this possible quirk. |
86 | sub ensure_all_roles { |
87 | my $applicant = shift; |
88 | _apply_all_roles($applicant, sub { !does_role($applicant, $_) }, @_); |
89 | } |
90 | |
d7d8a8c7 |
91 | sub apply_all_roles { |
92 | my $applicant = shift; |
8d4d1cdc |
93 | _apply_all_roles($applicant, undef, @_); |
b099a649 |
94 | } |
95 | |
96 | sub _apply_all_roles { |
97 | my $applicant = shift; |
98 | my $role_filter = shift; |
e606ae5f |
99 | |
70ea9161 |
100 | unless (@_) { |
101 | require Moose; |
102 | Moose->throw_error("Must specify at least one role to apply to $applicant"); |
103 | } |
e606ae5f |
104 | |
8e590ae4 |
105 | # If @_ contains role meta objects, mkopt will think that they're values, |
106 | # because they're references. In other words (roleobj1, roleobj2, |
107 | # roleobj3) will become [ [ roleobj1, roleobj2 ], [ roleobj3, undef ] ] |
108 | # -- this is no good. We'll preprocess @_ first to eliminate the potential |
109 | # bug. |
110 | # -- rjbs, 2011-04-08 |
111 | my $roles = Data::OptList::mkopt( [@_], { |
112 | moniker => 'role', |
113 | name_test => sub { |
114 | ! ref $_[0] or blessed($_[0]) && $_[0]->isa('Moose::Meta::Role') |
115 | } |
116 | }); |
e606ae5f |
117 | |
560c498d |
118 | my @role_metas; |
70ea9161 |
119 | foreach my $role (@$roles) { |
560c498d |
120 | my $meta; |
121 | |
122 | if ( blessed $role->[0] ) { |
123 | $meta = $role->[0]; |
124 | } |
125 | else { |
b5ae7c00 |
126 | load_class( $role->[0] , $role->[1] ); |
eea9eb4d |
127 | $meta = find_meta( $role->[0] ); |
560c498d |
128 | } |
70ea9161 |
129 | |
c8d9f1e2 |
130 | unless ($meta && $meta->isa('Moose::Meta::Role') ) { |
70ea9161 |
131 | require Moose; |
132 | Moose->throw_error( "You can only consume roles, " |
133 | . $role->[0] |
134 | . " is not a Moose role" ); |
135 | } |
560c498d |
136 | |
137 | push @role_metas, [ $meta, $role->[1] ]; |
70ea9161 |
138 | } |
e606ae5f |
139 | |
82a24871 |
140 | if ( defined $role_filter ) { |
560c498d |
141 | @role_metas = grep { local $_ = $_->[0]; $role_filter->() } @role_metas; |
8d4d1cdc |
142 | } |
b099a649 |
143 | |
560c498d |
144 | return unless @role_metas; |
b099a649 |
145 | |
b5ae7c00 |
146 | load_class($applicant) |
23360da2 |
147 | unless blessed($applicant) |
148 | || Class::MOP::class_of($applicant); |
149 | |
eea9eb4d |
150 | my $meta = ( blessed $applicant ? $applicant : Moose::Meta::Class->initialize($applicant) ); |
6fab0b75 |
151 | |
560c498d |
152 | if ( scalar @role_metas == 1 ) { |
153 | my ( $role, $params ) = @{ $role_metas[0] }; |
154 | $role->apply( $meta, ( defined $params ? %$params : () ) ); |
d7d8a8c7 |
155 | } |
156 | else { |
560c498d |
157 | Moose::Meta::Role->combine(@role_metas)->apply($meta); |
e606ae5f |
158 | } |
d7d8a8c7 |
159 | } |
160 | |
d26f5671 |
161 | sub with_traits { |
162 | my ($class, @roles) = @_; |
163 | return $class unless @roles; |
164 | return Moose::Meta::Class->create_anon_class( |
165 | superclasses => [$class], |
166 | roles => \@roles, |
167 | cache => 1, |
168 | )->name; |
169 | } |
170 | |
ab76842e |
171 | # instance deconstruction ... |
172 | |
173 | sub get_all_attribute_values { |
174 | my ($class, $instance) = @_; |
175 | return +{ |
176 | map { $_->name => $_->get_value($instance) } |
177 | grep { $_->has_value($instance) } |
b2df9268 |
178 | $class->get_all_attributes |
ab76842e |
179 | }; |
180 | } |
181 | |
182 | sub get_all_init_args { |
183 | my ($class, $instance) = @_; |
184 | return +{ |
185 | map { $_->init_arg => $_->get_value($instance) } |
186 | grep { $_->has_value($instance) } |
d03bd989 |
187 | grep { defined($_->init_arg) } |
b2df9268 |
188 | $class->get_all_attributes |
ab76842e |
189 | }; |
190 | } |
191 | |
50fbbf3d |
192 | sub resolve_metatrait_alias { |
50fbbf3d |
193 | return resolve_metaclass_alias( @_, trait => 1 ); |
a3738e5b |
194 | } |
195 | |
27f2f43f |
196 | sub _build_alias_package_name { |
197 | my ($type, $name, $trait) = @_; |
198 | return 'Moose::Meta::' |
199 | . $type |
200 | . '::Custom::' |
201 | . ( $trait ? 'Trait::' : '' ) |
202 | . $name; |
203 | } |
204 | |
50fbbf3d |
205 | { |
206 | my %cache; |
a3738e5b |
207 | |
50fbbf3d |
208 | sub resolve_metaclass_alias { |
209 | my ( $type, $metaclass_name, %options ) = @_; |
a3738e5b |
210 | |
50fbbf3d |
211 | my $cache_key = $type . q{ } . ( $options{trait} ? '-Trait' : '' ); |
212 | return $cache{$cache_key}{$metaclass_name} |
213 | if $cache{$cache_key}{$metaclass_name}; |
214 | |
27f2f43f |
215 | my $possible_full_name = _build_alias_package_name( |
216 | $type, $metaclass_name, $options{trait} |
217 | ); |
50fbbf3d |
218 | |
b5ae7c00 |
219 | my $loaded_class = load_first_existing_class( |
50fbbf3d |
220 | $possible_full_name, |
221 | $metaclass_name |
222 | ); |
223 | |
224 | return $cache{$cache_key}{$metaclass_name} |
225 | = $loaded_class->can('register_implementation') |
226 | ? $loaded_class->register_implementation |
227 | : $loaded_class; |
228 | } |
a3738e5b |
229 | } |
230 | |
5f71050b |
231 | sub add_method_modifier { |
232 | my ( $class_or_obj, $modifier_name, $args ) = @_; |
d5447d26 |
233 | my $meta |
234 | = $class_or_obj->can('add_before_method_modifier') |
235 | ? $class_or_obj |
236 | : find_meta($class_or_obj); |
5f71050b |
237 | my $code = pop @{$args}; |
238 | my $add_modifier_method = 'add_' . $modifier_name . '_method_modifier'; |
239 | if ( my $method_modifier_type = ref( @{$args}[0] ) ) { |
240 | if ( $method_modifier_type eq 'Regexp' ) { |
e606ae5f |
241 | my @all_methods = $meta->get_all_methods; |
5f71050b |
242 | my @matched_methods |
e606ae5f |
243 | = grep { $_->name =~ @{$args}[0] } @all_methods; |
244 | $meta->$add_modifier_method( $_->name, $code ) |
5f71050b |
245 | for @matched_methods; |
246 | } |
775666aa |
247 | elsif ($method_modifier_type eq 'ARRAY') { |
248 | $meta->$add_modifier_method( $_, $code ) for @{$args->[0]}; |
249 | } |
250 | else { |
251 | $meta->throw_error( |
252 | sprintf( |
253 | "Methods passed to %s must be provided as a list, arrayref or regex, not %s", |
254 | $modifier_name, |
255 | $method_modifier_type, |
256 | ) |
257 | ); |
258 | } |
5f71050b |
259 | } |
260 | else { |
261 | $meta->$add_modifier_method( $_, $code ) for @{$args}; |
262 | } |
263 | } |
d9bb6c63 |
264 | |
d939e016 |
265 | sub english_list { |
266 | my @items = sort @_; |
267 | |
268 | return $items[0] if @items == 1; |
269 | return "$items[0] and $items[1]" if @items == 2; |
270 | |
271 | my $tail = pop @items; |
272 | my $list = join ', ', @items; |
273 | $list .= ', and ' . $tail; |
274 | |
275 | return $list; |
276 | } |
277 | |
833b56a7 |
278 | sub _caller_info { |
279 | my $level = @_ ? ($_[0] + 1) : 2; |
280 | my %info; |
281 | @info{qw(package file line)} = caller($level); |
282 | return \%info; |
283 | } |
284 | |
27f2f43f |
285 | sub _create_alias { |
286 | my ($type, $name, $trait, $for) = @_; |
287 | my $package = _build_alias_package_name($type, $name, $trait); |
288 | Class::MOP::Class->initialize($package)->add_method( |
289 | register_implementation => sub { $for } |
290 | ); |
291 | } |
292 | |
293 | sub meta_attribute_alias { |
294 | my ($to, $from) = @_; |
295 | $from ||= caller; |
296 | my $meta = Class::MOP::class_of($from); |
297 | my $trait = $meta->isa('Moose::Meta::Role'); |
298 | _create_alias('Attribute', $to, $trait, $from); |
299 | } |
300 | |
301 | sub meta_class_alias { |
302 | my ($to, $from) = @_; |
303 | $from ||= caller; |
304 | my $meta = Class::MOP::class_of($from); |
305 | my $trait = $meta->isa('Moose::Meta::Role'); |
306 | _create_alias('Class', $to, $trait, $from); |
307 | } |
308 | |
88e88a7b |
309 | # XXX - this should be added to Params::Util |
5394a1c7 |
310 | sub _STRINGLIKE0 ($) { |
88e88a7b |
311 | return _STRING( $_[0] ) |
5394a1c7 |
312 | || ( defined $_[0] |
313 | && $_[0] eq q{} ) |
88e88a7b |
314 | || ( blessed $_[0] |
315 | && overload::Method( $_[0], q{""} ) |
316 | && length "$_[0]" ); |
317 | } |
318 | |
61907a02 |
319 | sub _reconcile_roles_for_metaclass { |
320 | my ($class_meta_name, $super_meta_name) = @_; |
321 | |
322 | my @role_differences = _role_differences( |
323 | $class_meta_name, $super_meta_name, |
324 | ); |
325 | |
326 | # handle the case where we need to fix compatibility between a class and |
327 | # its parent, but all roles in the class are already also done by the |
328 | # parent |
2c739d1a |
329 | # see t/metaclasses/metaclass_compat_no_fixing_bug.t |
61907a02 |
330 | return $super_meta_name |
331 | unless @role_differences; |
332 | |
333 | return Moose::Meta::Class->create_anon_class( |
334 | superclasses => [$super_meta_name], |
335 | roles => [map { $_->name } @role_differences], |
336 | cache => 1, |
337 | )->name; |
338 | } |
339 | |
340 | sub _role_differences { |
341 | my ($class_meta_name, $super_meta_name) = @_; |
6e15f532 |
342 | my @super_role_metas |
343 | = grep { !$_->isa('Moose::Meta::Role::Composite') } |
344 | $super_meta_name->meta->can('calculate_all_roles_with_inheritance') |
345 | ? $super_meta_name->meta->calculate_all_roles_with_inheritance |
346 | : $super_meta_name->meta->can('calculate_all_roles') |
347 | ? $super_meta_name->meta->calculate_all_roles |
348 | : (); |
349 | my @role_metas |
350 | = grep { !$_->isa('Moose::Meta::Role::Composite') } |
351 | $class_meta_name->meta->can('calculate_all_roles_with_inheritance') |
352 | ? $class_meta_name->meta->calculate_all_roles_with_inheritance |
353 | : $class_meta_name->meta->can('calculate_all_roles') |
354 | ? $class_meta_name->meta->calculate_all_roles |
355 | : (); |
61907a02 |
356 | my @differences; |
357 | for my $role_meta (@role_metas) { |
358 | push @differences, $role_meta |
359 | unless any { $_->name eq $role_meta->name } @super_role_metas; |
360 | } |
361 | return @differences; |
362 | } |
363 | |
d2782813 |
364 | sub _classes_differ_by_roles_only { |
365 | my ( $self_meta_name, $super_meta_name ) = @_; |
366 | |
367 | my $common_base_name |
368 | = _find_common_base( $self_meta_name, $super_meta_name ); |
369 | |
370 | return unless defined $common_base_name; |
371 | |
372 | my @super_meta_name_ancestor_names |
373 | = _get_ancestors_until( $super_meta_name, $common_base_name ); |
374 | my @class_meta_name_ancestor_names |
375 | = _get_ancestors_until( $self_meta_name, $common_base_name ); |
376 | |
377 | return |
378 | unless all { _is_role_only_subclass($_) } |
379 | @super_meta_name_ancestor_names, |
380 | @class_meta_name_ancestor_names; |
381 | |
382 | return 1; |
383 | } |
384 | |
385 | sub _find_common_base { |
386 | my ($meta1, $meta2) = map { Class::MOP::class_of($_) } @_; |
387 | return unless defined $meta1 && defined $meta2; |
388 | |
389 | # FIXME? This doesn't account for multiple inheritance (not sure |
390 | # if it needs to though). For example, if somewhere in $meta1's |
391 | # history it inherits from both ClassA and ClassB, and $meta2 |
392 | # inherits from ClassB & ClassA, does it matter? And what crazy |
393 | # fool would do that anyway? |
394 | |
395 | my %meta1_parents = map { $_ => 1 } $meta1->linearized_isa; |
396 | |
397 | return first { $meta1_parents{$_} } $meta2->linearized_isa; |
398 | } |
399 | |
400 | sub _get_ancestors_until { |
401 | my ($start_name, $until_name) = @_; |
402 | |
403 | my @ancestor_names; |
404 | for my $ancestor_name (Class::MOP::class_of($start_name)->linearized_isa) { |
405 | last if $ancestor_name eq $until_name; |
406 | push @ancestor_names, $ancestor_name; |
407 | } |
408 | return @ancestor_names; |
409 | } |
410 | |
411 | sub _is_role_only_subclass { |
412 | my ($meta_name) = @_; |
413 | my $meta = Class::MOP::Class->initialize($meta_name); |
414 | my @parent_names = $meta->superclasses; |
415 | |
416 | # XXX: don't feel like messing with multiple inheritance here... what would |
417 | # that even do? |
418 | return unless @parent_names == 1; |
419 | my ($parent_name) = @parent_names; |
420 | my $parent_meta = Class::MOP::Class->initialize($parent_name); |
421 | |
422 | # only get the roles attached to this particular class, don't look at |
423 | # superclasses |
424 | my @roles = $meta->can('calculate_all_roles') |
425 | ? $meta->calculate_all_roles |
426 | : (); |
427 | |
428 | # it's obviously not a role-only subclass if it doesn't do any roles |
429 | return unless @roles; |
430 | |
431 | # loop over all methods that are a part of the current class |
432 | # (not inherited) |
433 | for my $method ( $meta->_get_local_methods ) { |
434 | # always ignore meta |
ba7d613d |
435 | next if $method->isa('Class::MOP::Method::Meta'); |
d2782813 |
436 | # we'll deal with attributes below |
437 | next if $method->can('associated_attribute'); |
438 | # if the method comes from a role we consumed, ignore it |
439 | next if $meta->can('does_role') |
440 | && $meta->does_role($method->original_package_name); |
441 | # FIXME - this really isn't right. Just because a modifier is |
442 | # defined in a role doesn't mean it isn't _also_ defined in the |
443 | # subclass. |
444 | next if $method->isa('Class::MOP::Method::Wrapped') |
445 | && ( |
446 | (!scalar($method->around_modifiers) |
447 | || any { $_->has_around_method_modifiers($method->name) } @roles) |
448 | && (!scalar($method->before_modifiers) |
449 | || any { $_->has_before_method_modifiers($method->name) } @roles) |
450 | && (!scalar($method->after_modifiers) |
451 | || any { $_->has_after_method_modifiers($method->name) } @roles) |
452 | ); |
453 | |
454 | return 0; |
455 | } |
456 | |
457 | # loop over all attributes that are a part of the current class |
458 | # (not inherited) |
459 | # FIXME - this really isn't right. Just because an attribute is |
460 | # defined in a role doesn't mean it isn't _also_ defined in the |
461 | # subclass. |
462 | for my $attr (map { $meta->get_attribute($_) } $meta->get_attribute_list) { |
463 | next if any { $_->has_attribute($attr->name) } @roles; |
464 | |
465 | return 0; |
466 | } |
467 | |
468 | return 1; |
469 | } |
470 | |
9a641848 |
471 | 1; |
472 | |
ad46f524 |
473 | # ABSTRACT: Utilities for working with Moose classes |
474 | |
9a641848 |
475 | __END__ |
476 | |
477 | =pod |
478 | |
9a641848 |
479 | =head1 SYNOPSIS |
480 | |
6532ca5a |
481 | use Moose::Util qw/find_meta does_role search_class_by_role/; |
482 | |
483 | my $meta = find_meta($object) || die "No metaclass found"; |
9a641848 |
484 | |
adf82331 |
485 | if (does_role($object, $role)) { |
486 | print "The object can do $role!\n"; |
9a641848 |
487 | } |
488 | |
1631b53f |
489 | my $class = search_class_by_role($object, 'FooRole'); |
490 | print "Nearest class with 'FooRole' is $class\n"; |
491 | |
7125b244 |
492 | =head1 DESCRIPTION |
493 | |
2c3bf4e7 |
494 | This module provides a set of utility functions. Many of these |
495 | functions are intended for use in Moose itself or MooseX modules, but |
496 | some of them may be useful for use in your own code. |
7125b244 |
497 | |
498 | =head1 EXPORTED FUNCTIONS |
9a641848 |
499 | |
500 | =over 4 |
501 | |
2c3bf4e7 |
502 | =item B<find_meta($class_or_obj)> |
503 | |
504 | This method takes a class name or object and attempts to find a |
3ff98e47 |
505 | metaclass for the class, if one exists. It will B<not> create one if it |
2c3bf4e7 |
506 | does not yet exist. |
507 | |
560c498d |
508 | =item B<does_role($class_or_obj, $role_or_obj)> |
2c3bf4e7 |
509 | |
560c498d |
510 | Returns true if C<$class_or_obj> does the given C<$role_or_obj>. The role can |
511 | be provided as a name or a L<Moose::Meta::Role> object. |
6532ca5a |
512 | |
560c498d |
513 | The class must already have a metaclass for this to work. If it doesn't, this |
514 | function simply returns false. |
6532ca5a |
515 | |
560c498d |
516 | =item B<search_class_by_role($class_or_obj, $role_or_obj)> |
7125b244 |
517 | |
2c3bf4e7 |
518 | Returns the first class in the class's precedence list that does |
560c498d |
519 | C<$role_or_obj>, if any. The role can be either a name or a |
520 | L<Moose::Meta::Role> object. |
7125b244 |
521 | |
2c3bf4e7 |
522 | The class must already have a metaclass for this to work. |
7125b244 |
523 | |
2c3bf4e7 |
524 | =item B<apply_all_roles($applicant, @roles)> |
7125b244 |
525 | |
2c3bf4e7 |
526 | This function applies one or more roles to the given C<$applicant> The |
527 | applicant can be a role name, class name, or object. |
d7d8a8c7 |
528 | |
2c3bf4e7 |
529 | The C<$applicant> must already have a metaclass object. |
530 | |
560c498d |
531 | The list of C<@roles> should a list of names or L<Moose::Meta::Role> objects, |
532 | each of which can be followed by an optional hash reference of options |
533 | (C<-excludes> and C<-alias>). |
d7d8a8c7 |
534 | |
b099a649 |
535 | =item B<ensure_all_roles($applicant, @roles)> |
536 | |
6f970df6 |
537 | This function is similar to C<apply_all_roles>, but only applies roles that |
b099a649 |
538 | C<$applicant> does not already consume. |
539 | |
d26f5671 |
540 | =item B<with_traits($class_name, @role_names)> |
541 | |
542 | This function creates a new class from C<$class_name> with each of |
543 | C<@role_names> applied. It returns the name of the new class. |
544 | |
ab76842e |
545 | =item B<get_all_attribute_values($meta, $instance)> |
546 | |
2c3bf4e7 |
547 | Returns a hash reference containing all of the C<$instance>'s |
548 | attributes. The keys are attribute names. |
ab76842e |
549 | |
550 | =item B<get_all_init_args($meta, $instance)> |
551 | |
2c3bf4e7 |
552 | Returns a hash reference containing all of the C<init_arg> values for |
553 | the instance's attributes. The values are the associated attribute |
554 | values. If an attribute does not have a defined C<init_arg>, it is |
555 | skipped. |
556 | |
557 | This could be useful in cloning an object. |
ab76842e |
558 | |
a3738e5b |
559 | =item B<resolve_metaclass_alias($category, $name, %options)> |
560 | |
561 | =item B<resolve_metatrait_alias($category, $name, %options)> |
562 | |
2c3bf4e7 |
563 | Resolves a short name to a full class name. Short names are often used |
564 | when specifying the C<metaclass> or C<traits> option for an attribute: |
a3738e5b |
565 | |
566 | has foo => ( |
567 | metaclass => "Bar", |
568 | ); |
569 | |
8a8856de |
570 | The name resolution mechanism is covered in |
571 | L<Moose/Metaclass and Trait Name Resolution>. |
5f71050b |
572 | |
27f2f43f |
573 | =item B<meta_class_alias($to[, $from])> |
574 | |
575 | =item B<meta_attribute_alias($to[, $from])> |
576 | |
577 | Create an alias from the class C<$from> (or the current package, if |
578 | C<$from> is unspecified), so that |
579 | L<Moose/Metaclass and Trait Name Resolution> works properly. |
580 | |
57385c0d |
581 | =item B<english_list(@items)> |
582 | |
583 | Given a list of scalars, turns them into a proper list in English |
584 | ("one and two", "one, two, three, and four"). This is used to help us |
585 | make nicer error messages. |
586 | |
7125b244 |
587 | =back |
9a641848 |
588 | |
7125b244 |
589 | =head1 TODO |
9a641848 |
590 | |
7125b244 |
591 | Here is a list of possible functions to write |
9a641848 |
592 | |
7125b244 |
593 | =over 4 |
1631b53f |
594 | |
7125b244 |
595 | =item discovering original method from modified method |
1631b53f |
596 | |
7125b244 |
597 | =item search for origin class of a method or attribute |
1631b53f |
598 | |
9a641848 |
599 | =back |
600 | |
601 | =head1 BUGS |
602 | |
d4048ef3 |
603 | See L<Moose/BUGS> for details on reporting bugs. |
9a641848 |
604 | |
9a641848 |
605 | =cut |
606 | |