Commit | Line | Data |
ccb38d0b |
1 | package Mouse::PurePerl; |
2 | |
a52cca04 |
3 | require Mouse::Util; |
4 | |
df6dd016 |
5 | package |
6 | Mouse::Util; |
7 | |
8 | use strict; |
9 | use warnings; |
10 | |
11 | use warnings FATAL => 'redefine'; # to avoid to load Mouse::PurePerl |
12 | |
13 | use B (); |
14 | |
15 | sub is_class_loaded { |
16 | my $class = shift; |
17 | |
18 | return 0 if ref($class) || !defined($class) || !length($class); |
19 | |
20 | # walk the symbol table tree to avoid autovififying |
3bb9e54e |
21 | # \*{${main::}{"Foo::"}{"Bar::"}} == \*main::Foo::Bar:: |
df6dd016 |
22 | |
23 | my $pack = \%::; |
24 | foreach my $part (split('::', $class)) { |
3bb9e54e |
25 | $part .= '::'; |
26 | return 0 if !exists $pack->{$part}; |
27 | |
28 | my $entry = \$pack->{$part}; |
df6dd016 |
29 | return 0 if ref($entry) ne 'GLOB'; |
3bb9e54e |
30 | $pack = *{$entry}{HASH}; |
df6dd016 |
31 | } |
32 | |
3bb9e54e |
33 | return 0 if !%{$pack}; |
34 | |
df6dd016 |
35 | # check for $VERSION or @ISA |
36 | return 1 if exists $pack->{VERSION} |
37 | && defined *{$pack->{VERSION}}{SCALAR} && defined ${ $pack->{VERSION} }; |
38 | return 1 if exists $pack->{ISA} |
39 | && defined *{$pack->{ISA}}{ARRAY} && @{ $pack->{ISA} } != 0; |
40 | |
41 | # check for any method |
42 | foreach my $name( keys %{$pack} ) { |
43 | my $entry = \$pack->{$name}; |
44 | return 1 if ref($entry) ne 'GLOB' || defined *{$entry}{CODE}; |
45 | } |
46 | |
47 | # fail |
48 | return 0; |
49 | } |
50 | |
51 | |
52 | # taken from Sub::Identify |
53 | sub get_code_info { |
54 | my ($coderef) = @_; |
55 | ref($coderef) or return; |
56 | |
57 | my $cv = B::svref_2object($coderef); |
58 | $cv->isa('B::CV') or return; |
59 | |
60 | my $gv = $cv->GV; |
61 | $gv->isa('B::GV') or return; |
62 | |
63 | return ($gv->STASH->NAME, $gv->NAME); |
64 | } |
65 | |
66 | sub get_code_package{ |
67 | my($coderef) = @_; |
68 | |
69 | my $cv = B::svref_2object($coderef); |
70 | $cv->isa('B::CV') or return ''; |
71 | |
72 | my $gv = $cv->GV; |
73 | $gv->isa('B::GV') or return ''; |
74 | |
75 | return $gv->STASH->NAME; |
76 | } |
77 | |
7d96ae4d |
78 | sub get_code_ref{ |
79 | my($package, $name) = @_; |
80 | no strict 'refs'; |
81 | no warnings 'once'; |
82 | use warnings FATAL => 'uninitialized'; |
83 | return *{$package . '::' . $name}{CODE}; |
84 | } |
85 | |
e3540312 |
86 | sub generate_isa_predicate_for { |
1d5ecd5f |
87 | my($for_class, $name) = @_; |
88 | |
f48920c1 |
89 | my $predicate = sub{ Scalar::Util::blessed($_[0]) && $_[0]->isa($for_class) }; |
1d5ecd5f |
90 | |
91 | if(defined $name){ |
92 | no strict 'refs'; |
93 | *{ caller() . '::' . $name } = $predicate; |
94 | return; |
95 | } |
96 | |
97 | return $predicate; |
98 | } |
99 | |
100 | |
f48920c1 |
101 | package |
102 | Mouse::Util::TypeConstraints; |
103 | |
104 | use Scalar::Util qw(blessed looks_like_number openhandle); |
105 | |
7d96ae4d |
106 | sub Any { 1 } |
107 | sub Item { 1 } |
7d96ae4d |
108 | |
109 | sub Bool { $_[0] ? $_[0] eq '1' : 1 } |
110 | sub Undef { !defined($_[0]) } |
111 | sub Defined { defined($_[0]) } |
112 | sub Value { defined($_[0]) && !ref($_[0]) } |
113 | sub Num { !ref($_[0]) && looks_like_number($_[0]) } |
114 | sub Int { defined($_[0]) && !ref($_[0]) && $_[0] =~ /^-?[0-9]+$/ } |
115 | sub Str { defined($_[0]) && !ref($_[0]) } |
116 | |
117 | sub Ref { ref($_[0]) } |
118 | sub ScalarRef { ref($_[0]) eq 'SCALAR' } |
119 | sub ArrayRef { ref($_[0]) eq 'ARRAY' } |
120 | sub HashRef { ref($_[0]) eq 'HASH' } |
121 | sub CodeRef { ref($_[0]) eq 'CODE' } |
122 | sub RegexpRef { ref($_[0]) eq 'Regexp' } |
123 | sub GlobRef { ref($_[0]) eq 'GLOB' } |
124 | |
125 | sub FileHandle { |
126 | openhandle($_[0]) || (blessed($_[0]) && $_[0]->isa("IO::Handle")) |
127 | } |
128 | |
129 | sub Object { blessed($_[0]) && blessed($_[0]) ne 'Regexp' } |
130 | |
131 | sub ClassName { Mouse::Util::is_class_loaded($_[0]) } |
132 | sub RoleName { (Mouse::Util::class_of($_[0]) || return 0)->isa('Mouse::Meta::Role') } |
133 | |
619338ac |
134 | sub _parameterize_ArrayRef_for { |
135 | my($type_parameter) = @_; |
136 | my $check = $type_parameter->_compiled_type_constraint; |
137 | |
138 | return sub { |
139 | foreach my $value (@{$_}) { |
140 | return undef unless $check->($value); |
141 | } |
142 | return 1; |
143 | } |
144 | } |
145 | |
146 | sub _parameterize_HashRef_for { |
147 | my($type_parameter) = @_; |
148 | my $check = $type_parameter->_compiled_type_constraint; |
149 | |
150 | return sub { |
151 | foreach my $value(values %{$_}){ |
152 | return undef unless $check->($value); |
153 | } |
154 | return 1; |
155 | }; |
156 | } |
157 | |
158 | # 'Maybe' type accepts 'Any', so it requires parameters |
159 | sub _parameterize_Maybe_for { |
160 | my($type_parameter) = @_; |
161 | my $check = $type_parameter->_compiled_type_constraint; |
162 | |
163 | return sub{ |
164 | return !defined($_) || $check->($_); |
165 | }; |
166 | }; |
167 | |
168 | |
7d96ae4d |
169 | |
43165725 |
170 | package |
171 | Mouse::Meta::Module; |
172 | |
926404f2 |
173 | sub name { $_[0]->{package} } |
174 | |
175 | sub _method_map { $_[0]->{methods} } |
c5f6ad05 |
176 | sub _attribute_map{ $_[0]->{attributes} } |
43165725 |
177 | |
2591e962 |
178 | sub namespace{ |
179 | my $name = $_[0]->{package}; |
180 | no strict 'refs'; |
181 | return \%{ $name . '::' }; |
182 | } |
183 | |
3e44140b |
184 | sub add_method { |
185 | my($self, $name, $code) = @_; |
186 | |
187 | if(!defined $name){ |
188 | $self->throw_error('You must pass a defined name'); |
189 | } |
190 | if(!defined $code){ |
191 | $self->throw_error('You must pass a defined code'); |
192 | } |
193 | |
194 | if(ref($code) ne 'CODE'){ |
195 | $code = \&{$code}; # coerce |
196 | } |
197 | |
198 | $self->{methods}->{$name} = $code; # Moose stores meta object here. |
199 | |
200 | my $pkg = $self->name; |
201 | no strict 'refs'; |
202 | no warnings 'redefine', 'once'; |
203 | *{ $pkg . '::' . $name } = $code; |
204 | return; |
205 | } |
206 | |
f18345f1 |
207 | my %SIGIL_MAP = ( |
208 | '$' => 'SCALAR', |
209 | '@' => 'ARRAY', |
210 | '%' => 'HASH', |
211 | '&' => 'CODE', |
212 | '*' => 'GLOB', |
213 | ); |
214 | |
215 | sub _deconstruct_variable_name { |
216 | my($self, $variable) = @_; |
217 | |
218 | (defined $variable) |
219 | || $self->throw_error("You must pass a variable name"); |
220 | |
221 | my $sigil = substr($variable, 0, 1, ''); |
222 | |
223 | (defined $sigil) |
224 | || $self->throw_error("The variable name must include a sigil"); |
225 | |
226 | (exists $SIGIL_MAP{$sigil}) |
227 | || $self->throw_error("I do not recognize that sigil '$sigil'"); |
228 | |
229 | return ($variable, $SIGIL_MAP{$sigil}); |
230 | } |
231 | |
232 | sub has_package_symbol { |
233 | my($self, $variable) = @_; |
234 | |
235 | my($name, $type) = $self->_deconstruct_variable_name($variable); |
236 | |
237 | my $namespace = $self->namespace; |
238 | |
239 | return 0 unless exists $namespace->{$name}; |
240 | |
241 | my $entry_ref = \$namespace->{$name}; |
242 | if ( ref($entry_ref) eq 'GLOB' ) { |
243 | return defined( *{$entry_ref}{$type} ); |
244 | } |
245 | else { |
246 | # a symbol table entry can be -1 (stub), string (stub with prototype), |
247 | # or reference (constant) |
248 | return $type eq 'CODE'; |
249 | } |
250 | } |
251 | |
252 | sub get_package_symbol { |
253 | my ($self, $variable) = @_; |
254 | |
255 | my($name, $type) = $self->_deconstruct_variable_name($variable); |
256 | |
257 | my $namespace = $self->namespace; |
258 | |
259 | return undef |
260 | unless exists $namespace->{$name}; |
261 | |
262 | my $entry_ref = \$namespace->{$name}; |
263 | |
264 | if ( ref($entry_ref) eq 'GLOB' ) { |
265 | return *{$entry_ref}{$type}; |
266 | } |
267 | else { |
268 | if ( $type eq 'CODE' ) { |
269 | no strict 'refs'; |
270 | return \&{ $self->name . '::' . $name }; |
271 | } |
272 | else { |
273 | return undef; |
274 | } |
275 | } |
276 | } |
277 | |
3e44140b |
278 | |
43165725 |
279 | package |
280 | Mouse::Meta::Class; |
281 | |
e058b279 |
282 | sub method_metaclass { $_[0]->{method_metaclass} || 'Mouse::Meta::Method' } |
283 | sub attribute_metaclass { $_[0]->{attribute_metaclass} || 'Mouse::Meta::Attribute' } |
284 | |
285 | sub constructor_class { $_[0]->{constructor_class} || 'Mouse::Meta::Method::Constructor' } |
286 | sub destructor_class { $_[0]->{destructor_class} || 'Mouse::Meta::Method::Destructor' } |
4e7e3250 |
287 | |
43165725 |
288 | sub is_anon_class{ |
289 | return exists $_[0]->{anon_serial_id}; |
290 | } |
291 | |
292 | sub roles { $_[0]->{roles} } |
293 | |
cccb83de |
294 | sub linearized_isa { @{ get_linear_isa($_[0]->{package}) } } |
295 | |
da4432f3 |
296 | sub get_all_attributes { |
297 | my($self) = @_; |
047d7af0 |
298 | my %attrs = map { %{ $self->initialize($_)->{attributes} } } reverse $self->linearized_isa; |
da4432f3 |
299 | return values %attrs; |
300 | } |
301 | |
ba153b33 |
302 | sub new_object { |
303 | my $self = shift; |
304 | my %args = (@_ == 1 ? %{$_[0]} : @_); |
305 | |
306 | my $object = bless {}, $self->name; |
307 | |
308 | $self->_initialize_object($object, \%args); |
309 | return $object; |
310 | } |
311 | |
4e7e3250 |
312 | sub _initialize_object{ |
313 | my($self, $object, $args, $ignore_triggers) = @_; |
314 | |
315 | my @triggers_queue; |
316 | |
317 | foreach my $attribute ($self->get_all_attributes) { |
318 | my $init_arg = $attribute->init_arg; |
319 | my $slot = $attribute->name; |
320 | |
321 | if (defined($init_arg) && exists($args->{$init_arg})) { |
322 | $object->{$slot} = $attribute->_coerce_and_verify($args->{$init_arg}, $object); |
323 | |
324 | weaken($object->{$slot}) |
325 | if ref($object->{$slot}) && $attribute->is_weak_ref; |
326 | |
327 | if ($attribute->has_trigger) { |
328 | push @triggers_queue, [ $attribute->trigger, $object->{$slot} ]; |
329 | } |
330 | } |
331 | else { # no init arg |
332 | if ($attribute->has_default || $attribute->has_builder) { |
333 | if (!$attribute->is_lazy) { |
334 | my $default = $attribute->default; |
335 | my $builder = $attribute->builder; |
336 | my $value = $builder ? $object->$builder() |
337 | : ref($default) eq 'CODE' ? $object->$default() |
338 | : $default; |
339 | |
340 | $object->{$slot} = $attribute->_coerce_and_verify($value, $object); |
341 | |
342 | weaken($object->{$slot}) |
343 | if ref($object->{$slot}) && $attribute->is_weak_ref; |
344 | } |
345 | } |
346 | elsif($attribute->is_required) { |
347 | $self->throw_error("Attribute (".$attribute->name.") is required"); |
348 | } |
349 | } |
350 | } |
351 | |
352 | if(!$ignore_triggers){ |
353 | foreach my $trigger_and_value(@triggers_queue){ |
354 | my($trigger, $value) = @{$trigger_and_value}; |
355 | $trigger->($object, $value); |
356 | } |
357 | } |
358 | |
359 | if($self->is_anon_class){ |
360 | $object->{__METACLASS__} = $self; |
361 | } |
362 | |
363 | return; |
364 | } |
365 | |
366 | |
43165725 |
367 | package |
368 | Mouse::Meta::Role; |
369 | |
e058b279 |
370 | sub method_metaclass{ $_[0]->{method_metaclass} || 'Mouse::Meta::Role::Method' } |
371 | |
43165725 |
372 | sub is_anon_role{ |
373 | return exists $_[0]->{anon_serial_id}; |
374 | } |
375 | |
376 | sub get_roles { $_[0]->{roles} } |
377 | |
378 | package |
379 | Mouse::Meta::Attribute; |
380 | |
e058b279 |
381 | require Mouse::Meta::Method::Accessor; |
382 | |
383 | sub accessor_metaclass{ $_[0]->{accessor_metaclass} || 'Mouse::Meta::Method::Accessor' } |
43165725 |
384 | |
385 | # readers |
386 | |
387 | sub name { $_[0]->{name} } |
388 | sub associated_class { $_[0]->{associated_class} } |
389 | |
390 | sub accessor { $_[0]->{accessor} } |
391 | sub reader { $_[0]->{reader} } |
392 | sub writer { $_[0]->{writer} } |
393 | sub predicate { $_[0]->{predicate} } |
394 | sub clearer { $_[0]->{clearer} } |
395 | sub handles { $_[0]->{handles} } |
396 | |
397 | sub _is_metadata { $_[0]->{is} } |
398 | sub is_required { $_[0]->{required} } |
399 | sub default { $_[0]->{default} } |
400 | sub is_lazy { $_[0]->{lazy} } |
401 | sub is_lazy_build { $_[0]->{lazy_build} } |
402 | sub is_weak_ref { $_[0]->{weak_ref} } |
403 | sub init_arg { $_[0]->{init_arg} } |
404 | sub type_constraint { $_[0]->{type_constraint} } |
405 | |
406 | sub trigger { $_[0]->{trigger} } |
407 | sub builder { $_[0]->{builder} } |
408 | sub should_auto_deref { $_[0]->{auto_deref} } |
409 | sub should_coerce { $_[0]->{coerce} } |
410 | |
d899d3e7 |
411 | sub documentation { $_[0]->{documentation} } |
412 | |
43165725 |
413 | # predicates |
414 | |
415 | sub has_accessor { exists $_[0]->{accessor} } |
416 | sub has_reader { exists $_[0]->{reader} } |
417 | sub has_writer { exists $_[0]->{writer} } |
418 | sub has_predicate { exists $_[0]->{predicate} } |
419 | sub has_clearer { exists $_[0]->{clearer} } |
420 | sub has_handles { exists $_[0]->{handles} } |
421 | |
422 | sub has_default { exists $_[0]->{default} } |
423 | sub has_type_constraint { exists $_[0]->{type_constraint} } |
424 | sub has_trigger { exists $_[0]->{trigger} } |
425 | sub has_builder { exists $_[0]->{builder} } |
426 | |
d899d3e7 |
427 | sub has_documentation { exists $_[0]->{documentation} } |
428 | |
43165725 |
429 | package |
430 | Mouse::Meta::TypeConstraint; |
431 | |
432 | sub name { $_[0]->{name} } |
433 | sub parent { $_[0]->{parent} } |
434 | sub message { $_[0]->{message} } |
435 | |
436 | sub _compiled_type_constraint{ $_[0]->{compiled_type_constraint} } |
437 | |
93540011 |
438 | sub _compiled_type_coercion { $_[0]->{_compiled_type_coercion} } |
df6dd016 |
439 | |
93540011 |
440 | sub has_coercion{ exists $_[0]->{_compiled_type_coercion} } |
df6dd016 |
441 | |
f790c46b |
442 | |
443 | sub compile_type_constraint{ |
444 | my($self) = @_; |
445 | |
446 | # add parents first |
447 | my @checks; |
448 | for(my $parent = $self->{parent}; defined $parent; $parent = $parent->{parent}){ |
449 | if($parent->{hand_optimized_type_constraint}){ |
450 | unshift @checks, $parent->{hand_optimized_type_constraint}; |
451 | last; # a hand optimized constraint must include all the parents |
452 | } |
453 | elsif($parent->{constraint}){ |
454 | unshift @checks, $parent->{constraint}; |
455 | } |
456 | } |
457 | |
458 | # then add child |
459 | if($self->{constraint}){ |
460 | push @checks, $self->{constraint}; |
461 | } |
462 | |
463 | if($self->{type_constraints}){ # Union |
464 | my @types = map{ $_->{compiled_type_constraint} } @{ $self->{type_constraints} }; |
465 | push @checks, sub{ |
466 | foreach my $c(@types){ |
467 | return 1 if $c->($_[0]); |
468 | } |
469 | return 0; |
470 | }; |
471 | } |
472 | |
473 | if(@checks == 0){ |
474 | $self->{compiled_type_constraint} = \&Mouse::Util::TypeConstraints::Any; |
475 | } |
476 | else{ |
477 | $self->{compiled_type_constraint} = sub{ |
478 | my(@args) = @_; |
479 | local $_ = $args[0]; |
480 | foreach my $c(@checks){ |
481 | return undef if !$c->(@args); |
482 | } |
483 | return 1; |
484 | }; |
485 | } |
486 | return; |
487 | } |
488 | |
aa2d2e2c |
489 | package |
490 | Mouse::Object; |
491 | |
492 | |
493 | sub BUILDARGS { |
494 | my $class = shift; |
f790c46b |
495 | |
aa2d2e2c |
496 | if (scalar @_ == 1) { |
497 | (ref($_[0]) eq 'HASH') |
498 | || $class->meta->throw_error("Single parameters to new() must be a HASH ref"); |
499 | |
500 | return {%{$_[0]}}; |
501 | } |
502 | else { |
503 | return {@_}; |
504 | } |
505 | } |
f790c46b |
506 | |
af04626d |
507 | sub new { |
508 | my $class = shift; |
509 | |
510 | $class->meta->throw_error('Cannot call new() on an instance') if ref $class; |
511 | |
512 | my $args = $class->BUILDARGS(@_); |
513 | |
514 | my $meta = Mouse::Meta::Class->initialize($class); |
515 | my $self = $meta->new_object($args); |
516 | |
517 | # BUILDALL |
518 | if( $self->can('BUILD') ) { |
519 | for my $class (reverse $meta->linearized_isa) { |
520 | my $build = Mouse::Util::get_code_ref($class, 'BUILD') |
521 | || next; |
522 | |
523 | $self->$build($args); |
524 | } |
525 | } |
526 | |
527 | return $self; |
528 | } |
529 | |
a5c683f6 |
530 | sub DESTROY { |
531 | my $self = shift; |
532 | |
533 | return unless $self->can('DEMOLISH'); # short circuit |
534 | |
535 | local $?; |
536 | |
537 | my $e = do{ |
538 | local $@; |
539 | eval{ |
540 | |
541 | # DEMOLISHALL |
542 | |
543 | # We cannot count on being able to retrieve a previously made |
544 | # metaclass, _or_ being able to make a new one during global |
545 | # destruction. However, we should still be able to use mro at |
546 | # that time (at least tests suggest so ;) |
547 | |
548 | foreach my $class (@{ Mouse::Util::get_linear_isa(ref $self) }) { |
549 | my $demolish = Mouse::Util::get_code_ref($class, 'DEMOLISH') |
550 | || next; |
551 | |
552 | $self->$demolish(); |
553 | } |
554 | }; |
555 | $@; |
556 | }; |
557 | |
558 | no warnings 'misc'; |
559 | die $e if $e; # rethrow |
560 | } |
561 | |
df6dd016 |
562 | 1; |
563 | __END__ |
ccb38d0b |
564 | |
565 | =head1 NAME |
566 | |
567 | Mouse::PurePerl - A Mouse guts in pure Perl |
568 | |
569 | =head1 VERSION |
570 | |
506fb74d |
571 | This document describes Mouse version 0.40_09 |
ccb38d0b |
572 | |
573 | =head1 SEE ALSO |
574 | |
575 | L<Mouse::XS> |
576 | |
577 | =cut |