Commit | Line | Data |
4093c859 |
1 | package Mouse::Util; |
bc69ee88 |
2 | use Mouse::Exporter; # enables strict and warnings |
6d28c5cf |
3 | |
ba153b33 |
4 | sub get_linear_isa($;$); # must be here |
5 | |
df6dd016 |
6 | BEGIN{ |
8aba926d |
7 | # This is used in Mouse::PurePerl |
8 | Mouse::Exporter->setup_import_methods( |
9 | as_is => [qw( |
10 | find_meta |
11 | does_role |
12 | resolve_metaclass_alias |
13 | apply_all_roles |
14 | english_list |
15 | |
16 | load_class |
17 | is_class_loaded |
18 | |
19 | get_linear_isa |
20 | get_code_info |
21 | |
22 | get_code_package |
23 | get_code_ref |
24 | |
25 | not_supported |
26 | |
27 | does meta dump |
28 | )], |
29 | groups => { |
30 | default => [], # export no functions by default |
31 | |
32 | # The ':meta' group is 'use metaclass' for Mouse |
33 | meta => [qw(does meta dump)], |
34 | }, |
35 | ); |
36 | |
37 | |
df6dd016 |
38 | # Because Mouse::Util is loaded first in all the Mouse sub-modules, |
39 | # XS loader is placed here, not in Mouse.pm. |
40 | |
8c235ea7 |
41 | our $VERSION = '0.46'; |
df6dd016 |
42 | |
db5e4409 |
43 | my $xs = !(exists $INC{'Mouse/PurePerl.pm'} || $ENV{MOUSE_PUREPERL}); |
df6dd016 |
44 | |
db5e4409 |
45 | if($xs){ |
34bdc46a |
46 | # XXX: XSLoader tries to get the object path from caller's file name |
47 | # $hack_mouse_file fools its mechanism |
48 | |
49 | (my $hack_mouse_file = __FILE__) =~ s/.Util//; # .../Mouse/Util.pm -> .../Mouse.pm |
db5e4409 |
50 | $xs = eval sprintf("#line %d %s\n", __LINE__, $hack_mouse_file) . q{ |
df6dd016 |
51 | require XSLoader; |
52 | XSLoader::load('Mouse', $VERSION); |
923a04ba |
53 | Mouse::Util->import({ into => 'Mouse::Meta::Method::Constructor::XS' }, ':meta'); |
54 | Mouse::Util->import({ into => 'Mouse::Meta::Method::Destructor::XS' }, ':meta'); |
3821b191 |
55 | Mouse::Util->import({ into => 'Mouse::Meta::Method::Accessor::XS' }, ':meta'); |
923a04ba |
56 | return 1; |
029463f4 |
57 | } || 0; |
1a6d349c |
58 | #warn $@ if $@; |
df6dd016 |
59 | } |
60 | |
db5e4409 |
61 | if(!$xs){ |
df6dd016 |
62 | require 'Mouse/PurePerl.pm'; # we don't want to create its namespace |
63 | } |
db5e4409 |
64 | |
ecd4a125 |
65 | *MOUSE_XS = sub(){ $xs }; |
df6dd016 |
66 | } |
67 | |
5dd5edef |
68 | use Carp (); |
69 | use Scalar::Util (); |
4093c859 |
70 | |
04493075 |
71 | use constant _MOUSE_VERBOSE => !!$ENV{MOUSE_VERBOSE}; |
72 | |
739525d0 |
73 | # aliases as public APIs |
deb9a0f3 |
74 | # it must be 'require', not 'use', because Mouse::Meta::Module depends on Mouse::Util |
7727a2f0 |
75 | require Mouse::Meta::Module; # for the entities of metaclass cache utilities |
76 | |
77 | BEGIN { |
542f20ad |
78 | *class_of = \&Mouse::Meta::Module::_class_of; |
79 | *get_metaclass_by_name = \&Mouse::Meta::Module::_get_metaclass_by_name; |
80 | *get_all_metaclass_instances = \&Mouse::Meta::Module::_get_all_metaclass_instances; |
81 | *get_all_metaclass_names = \&Mouse::Meta::Module::_get_all_metaclass_names; |
f48920c1 |
82 | |
83 | # is-a predicates |
6a4ab70d |
84 | #generate_isa_predicate_for('Mouse::Meta::TypeConstraint' => 'is_a_type_constraint'); |
85 | #generate_isa_predicate_for('Mouse::Meta::Class' => 'is_a_metaclass'); |
86 | #generate_isa_predicate_for('Mouse::Meta::Role' => 'is_a_metarole'); |
87 | |
88 | # duck type predicates |
89 | generate_can_predicate_for(['_compiled_type_constraint'] => 'is_a_type_constraint'); |
90 | generate_can_predicate_for(['create_anon_class'] => 'is_a_metaclass'); |
91 | generate_can_predicate_for(['create_anon_role'] => 'is_a_metarole'); |
739525d0 |
92 | } |
93 | |
39a8df63 |
94 | our $in_global_destruction = 0; |
95 | END{ $in_global_destruction = 1 } |
f48920c1 |
96 | |
08f7a8db |
97 | # Moose::Util compatible utilities |
98 | |
99 | sub find_meta{ |
739525d0 |
100 | return class_of( $_[0] ); |
08f7a8db |
101 | } |
102 | |
103 | sub does_role{ |
53875581 |
104 | my ($class_or_obj, $role_name) = @_; |
8e64d0fa |
105 | |
739525d0 |
106 | my $meta = class_of($class_or_obj); |
8e64d0fa |
107 | |
53875581 |
108 | (defined $role_name) |
109 | || ($meta || 'Mouse::Meta::Class')->throw_error("You must supply a role name to does()"); |
110 | |
111 | return defined($meta) && $meta->does_role($role_name); |
08f7a8db |
112 | } |
113 | |
42d7df00 |
114 | BEGIN { |
f15868c3 |
115 | my $get_linear_isa; |
bcd39bf4 |
116 | if ($] >= 5.009_005) { |
388b8ebd |
117 | require mro; |
f15868c3 |
118 | $get_linear_isa = \&mro::get_linear_isa; |
272a1930 |
119 | } else { |
272a1930 |
120 | # VVVVV CODE TAKEN FROM MRO::COMPAT VVVVV |
ce5a7699 |
121 | my $_get_linear_isa_dfs; # this recurses so it isn't pretty |
122 | $_get_linear_isa_dfs = sub { |
123 | my($classname) = @_; |
124 | |
125 | my @lin = ($classname); |
126 | my %stored; |
127 | |
128 | no strict 'refs'; |
129 | foreach my $parent (@{"$classname\::ISA"}) { |
130 | my $plin = $_get_linear_isa_dfs->($parent); |
131 | foreach my $p(@$plin) { |
132 | next if exists $stored{$p}; |
133 | push(@lin, $p); |
134 | $stored{$p} = 1; |
272a1930 |
135 | } |
ce5a7699 |
136 | } |
137 | return \@lin; |
138 | }; |
272a1930 |
139 | # ^^^^^ CODE TAKEN FROM MRO::COMPAT ^^^^^ |
ce5a7699 |
140 | |
141 | eval{ require Class::C3 }; |
142 | |
143 | # MRO::Compat::__get_linear_isa has no prototype, so |
144 | # we define a prototyped version for compatibility with core's |
145 | # See also MRO::Compat::__get_linear_isa. |
146 | $get_linear_isa = sub ($;$){ |
147 | my($classname, $type) = @_; |
d76a3e9d |
148 | package # hide from PAUSE |
149 | Class::C3; |
ce5a7699 |
150 | if(!defined $type){ |
ce5a7699 |
151 | our %MRO; |
152 | $type = exists $MRO{$classname} ? 'c3' : 'dfs'; |
153 | } |
154 | return $type eq 'c3' |
d76a3e9d |
155 | ? [calculateMRO($classname)] |
278448b8 |
156 | : $_get_linear_isa_dfs->($classname); |
ce5a7699 |
157 | }; |
eae80759 |
158 | } |
bcd39bf4 |
159 | |
f15868c3 |
160 | *get_linear_isa = $get_linear_isa; |
eae80759 |
161 | } |
162 | |
3a63a2e7 |
163 | |
08f7a8db |
164 | # taken from Mouse::Util (0.90) |
abfdffe0 |
165 | { |
166 | my %cache; |
167 | |
8e64d0fa |
168 | sub resolve_metaclass_alias { |
169 | my ( $type, $metaclass_name, %options ) = @_; |
170 | |
171 | my $cache_key = $type . q{ } . ( $options{trait} ? '-Trait' : '' ); |
172 | |
173 | return $cache{$cache_key}{$metaclass_name} ||= do{ |
abfdffe0 |
174 | |
08f7a8db |
175 | my $possible_full_name = join '::', |
176 | 'Mouse::Meta', $type, 'Custom', ($options{trait} ? 'Trait' : ()), $metaclass_name |
177 | ; |
178 | |
8e64d0fa |
179 | my $loaded_class = load_first_existing_class( |
180 | $possible_full_name, |
181 | $metaclass_name |
182 | ); |
183 | |
184 | $loaded_class->can('register_implementation') |
185 | ? $loaded_class->register_implementation |
08f7a8db |
186 | : $loaded_class; |
8e64d0fa |
187 | }; |
abfdffe0 |
188 | } |
189 | } |
190 | |
739525d0 |
191 | # Utilities from Class::MOP |
192 | |
df6dd016 |
193 | sub get_code_info; |
194 | sub get_code_package; |
739525d0 |
195 | |
abfdffe0 |
196 | # taken from Class/MOP.pm |
a81cc7b8 |
197 | sub is_valid_class_name { |
abfdffe0 |
198 | my $class = shift; |
199 | |
200 | return 0 if ref($class); |
201 | return 0 unless defined($class); |
abfdffe0 |
202 | |
ba153b33 |
203 | return 1 if $class =~ /\A \w+ (?: :: \w+ )* \z/xms; |
abfdffe0 |
204 | |
205 | return 0; |
206 | } |
207 | |
208 | # taken from Class/MOP.pm |
209 | sub load_first_existing_class { |
210 | my @classes = @_ |
211 | or return; |
212 | |
23264b5b |
213 | my %exceptions; |
214 | for my $class (@classes) { |
abfdffe0 |
215 | my $e = _try_load_one_class($class); |
216 | |
217 | if ($e) { |
218 | $exceptions{$class} = $e; |
219 | } |
220 | else { |
53875581 |
221 | return $class; |
abfdffe0 |
222 | } |
223 | } |
abfdffe0 |
224 | |
53875581 |
225 | # not found |
5dd5edef |
226 | Carp::confess join( |
abfdffe0 |
227 | "\n", |
228 | map { |
229 | sprintf( "Could not load class (%s) because : %s", |
230 | $_, $exceptions{$_} ) |
231 | } @classes |
232 | ); |
233 | } |
234 | |
235 | # taken from Class/MOP.pm |
3aac966d |
236 | my %is_class_loaded_cache; |
abfdffe0 |
237 | sub _try_load_one_class { |
238 | my $class = shift; |
239 | |
6cfa1e5e |
240 | unless ( is_valid_class_name($class) ) { |
241 | my $display = defined($class) ? $class : 'undef'; |
5dd5edef |
242 | Carp::confess "Invalid class name ($display)"; |
6cfa1e5e |
243 | } |
244 | |
3aac966d |
245 | return undef if $is_class_loaded_cache{$class} ||= is_class_loaded($class); |
abfdffe0 |
246 | |
247 | my $file = $class . '.pm'; |
248 | $file =~ s{::}{/}g; |
249 | |
250 | return do { |
251 | local $@; |
252 | eval { require($file) }; |
253 | $@; |
254 | }; |
255 | } |
256 | |
6cfa1e5e |
257 | |
258 | sub load_class { |
259 | my $class = shift; |
260 | my $e = _try_load_one_class($class); |
5dd5edef |
261 | Carp::confess "Could not load class ($class) because : $e" if $e; |
6cfa1e5e |
262 | |
263 | return 1; |
264 | } |
265 | |
df6dd016 |
266 | sub is_class_loaded; |
6cfa1e5e |
267 | |
2e92bb89 |
268 | sub apply_all_roles { |
5dd5edef |
269 | my $applicant = Scalar::Util::blessed($_[0]) |
270 | ? shift # instance |
271 | : Mouse::Meta::Class->initialize(shift); # class or role name |
2e92bb89 |
272 | |
21498b08 |
273 | my @roles; |
f6715552 |
274 | |
275 | # Basis of Data::OptList |
21498b08 |
276 | my $max = scalar(@_); |
277 | for (my $i = 0; $i < $max ; $i++) { |
278 | if ($i + 1 < $max && ref($_[$i + 1])) { |
b1980b86 |
279 | push @roles, [ $_[$i] => $_[++$i] ]; |
21498b08 |
280 | } else { |
b1980b86 |
281 | push @roles, [ $_[$i] => undef ]; |
21498b08 |
282 | } |
ff687069 |
283 | my $role_name = $roles[-1][0]; |
284 | load_class($role_name); |
0126c27c |
285 | |
f48920c1 |
286 | is_a_metarole( get_metaclass_by_name($role_name) ) |
9ad58623 |
287 | || $applicant->meta->throw_error("You can only consume roles, $role_name is not a Mouse role"); |
21498b08 |
288 | } |
289 | |
21498b08 |
290 | if ( scalar @roles == 1 ) { |
b1980b86 |
291 | my ( $role_name, $params ) = @{ $roles[0] }; |
292 | get_metaclass_by_name($role_name)->apply( $applicant, defined $params ? $params : () ); |
21498b08 |
293 | } |
294 | else { |
71e7b544 |
295 | Mouse::Meta::Role->combine(@roles)->apply($applicant); |
21498b08 |
296 | } |
23264b5b |
297 | return; |
2e92bb89 |
298 | } |
299 | |
2e33bb59 |
300 | # taken from Moose::Util 0.90 |
301 | sub english_list { |
8e64d0fa |
302 | return $_[0] if @_ == 1; |
303 | |
304 | my @items = sort @_; |
305 | |
306 | return "$items[0] and $items[1]" if @items == 2; |
307 | |
308 | my $tail = pop @items; |
309 | |
310 | return join q{, }, @items, "and $tail"; |
2e33bb59 |
311 | } |
312 | |
53875581 |
313 | # common utilities |
314 | |
fce211ae |
315 | sub not_supported{ |
316 | my($feature) = @_; |
317 | |
318 | $feature ||= ( caller(1) )[3]; # subroutine name |
319 | |
1b9e472d |
320 | local $Carp::CarpLevel = $Carp::CarpLevel + 1; |
321 | Carp::confess("Mouse does not currently support $feature"); |
fce211ae |
322 | } |
323 | |
fc8628e3 |
324 | # general meta() method |
325 | sub meta :method{ |
152e5759 |
326 | return Mouse::Meta::Class->initialize(ref($_[0]) || $_[0]); |
53875581 |
327 | } |
328 | |
fc8628e3 |
329 | # general dump() method |
330 | sub dump :method { |
53875581 |
331 | my($self, $maxdepth) = @_; |
332 | |
333 | require 'Data/Dumper.pm'; # we don't want to create its namespace |
334 | my $dd = Data::Dumper->new([$self]); |
335 | $dd->Maxdepth(defined($maxdepth) ? $maxdepth : 2); |
336 | $dd->Indent(1); |
337 | return $dd->Dump(); |
338 | } |
339 | |
fc8628e3 |
340 | # general does() method |
53875581 |
341 | sub does :method; |
342 | *does = \&does_role; # alias |
343 | |
4093c859 |
344 | 1; |
f38ce2d0 |
345 | __END__ |
346 | |
347 | =head1 NAME |
348 | |
bedd575c |
349 | Mouse::Util - Features, with or without their dependencies |
f38ce2d0 |
350 | |
a25ca8d6 |
351 | =head1 VERSION |
352 | |
8c235ea7 |
353 | This document describes Mouse version 0.46 |
a25ca8d6 |
354 | |
f38ce2d0 |
355 | =head1 IMPLEMENTATIONS FOR |
356 | |
ea249879 |
357 | =head2 Moose::Util |
358 | |
359 | =head3 C<find_meta> |
360 | |
361 | =head3 C<does_role> |
362 | |
363 | =head3 C<resolve_metaclass_alias> |
364 | |
365 | =head3 C<apply_all_roles> |
366 | |
367 | =head3 C<english_list> |
368 | |
369 | =head2 Class::MOP |
370 | |
5bacd9bf |
371 | =head3 C<< is_class_loaded(ClassName) -> Bool >> |
ea249879 |
372 | |
1820fffe |
373 | Returns whether C<ClassName> is actually loaded or not. It uses a heuristic which |
374 | involves checking for the existence of C<$VERSION>, C<@ISA>, and any |
375 | locally-defined method. |
376 | |
377 | =head3 C<< load_class(ClassName) >> |
378 | |
739525d0 |
379 | This will load a given C<ClassName> (or die if it is not loadable). |
1820fffe |
380 | This function can be used in place of tricks like |
381 | C<eval "use $module"> or using C<require>. |
ea249879 |
382 | |
5164490d |
383 | =head3 C<< Mouse::Util::class_of(ClassName or Object) >> |
739525d0 |
384 | |
5164490d |
385 | =head3 C<< Mouse::Util::get_metaclass_by_name(ClassName) >> |
739525d0 |
386 | |
5164490d |
387 | =head3 C<< Mouse::Util::get_all_metaclass_instances() >> |
739525d0 |
388 | |
5164490d |
389 | =head3 C<< Mouse::Util::get_all_metaclass_names() >> |
739525d0 |
390 | |
ea249879 |
391 | =head2 MRO::Compat |
392 | |
393 | =head3 C<get_linear_isa> |
394 | |
395 | =head2 Sub::Identify |
396 | |
397 | =head3 C<get_code_info> |
398 | |
5482cd4c |
399 | =head1 Mouse specific utilities |
ea249879 |
400 | |
bedd575c |
401 | =head3 C<not_supported> |
f38ce2d0 |
402 | |
5482cd4c |
403 | =head3 C<get_code_package> |
404 | |
405 | =head3 C<get_code_ref> |
406 | |
1820fffe |
407 | =head1 SEE ALSO |
408 | |
409 | L<Moose::Util> |
410 | |
5164490d |
411 | L<Class::MOP> |
1820fffe |
412 | |
413 | L<Sub::Identify> |
414 | |
415 | L<MRO::Compat> |
416 | |
f38ce2d0 |
417 | =cut |
418 | |