1 package Mouse::PurePerl;
10 use warnings FATAL => 'redefine'; # to avoid to load Mouse::PurePerl
15 # taken from Class/MOP.pm
16 sub is_valid_class_name {
19 return 0 if ref($class);
20 return 0 unless defined($class);
22 return 1 if $class =~ /\A \w+ (?: :: \w+ )* \z/xms;
30 return 0 if ref($class) || !defined($class) || !length($class);
32 # walk the symbol table tree to avoid autovififying
33 # \*{${main::}{"Foo::"}{"Bar::"}} == \*main::Foo::Bar::
36 foreach my $part (split('::', $class)) {
38 return 0 if !exists $pack->{$part};
40 my $entry = \$pack->{$part};
41 return 0 if ref($entry) ne 'GLOB';
42 $pack = *{$entry}{HASH};
45 return 0 if !%{$pack};
47 # check for $VERSION or @ISA
48 return 1 if exists $pack->{VERSION}
49 && defined *{$pack->{VERSION}}{SCALAR} && defined ${ $pack->{VERSION} };
50 return 1 if exists $pack->{ISA}
51 && defined *{$pack->{ISA}}{ARRAY} && @{ $pack->{ISA} } != 0;
53 # check for any method
54 foreach my $name( keys %{$pack} ) {
55 my $entry = \$pack->{$name};
56 return 1 if ref($entry) ne 'GLOB' || defined *{$entry}{CODE};
64 # taken from Sub::Identify
67 ref($coderef) or return;
69 my $cv = B::svref_2object($coderef);
70 $cv->isa('B::CV') or return;
73 $gv->isa('B::GV') or return;
75 return ($gv->STASH->NAME, $gv->NAME);
81 my $cv = B::svref_2object($coderef);
82 $cv->isa('B::CV') or return '';
85 $gv->isa('B::GV') or return '';
87 return $gv->STASH->NAME;
91 my($package, $name) = @_;
94 use warnings FATAL => 'uninitialized';
95 return *{$package . '::' . $name}{CODE};
98 sub generate_isa_predicate_for {
99 my($for_class, $name) = @_;
101 my $predicate = sub{ Scalar::Util::blessed($_[0]) && $_[0]->isa($for_class) };
104 Mouse::Util::install_subroutines(scalar caller, $name => $predicate);
111 sub generate_can_predicate_for {
112 my($methods_ref, $name) = @_;
114 my @methods = @{$methods_ref};
118 if(Scalar::Util::blessed($instance)){
119 foreach my $method(@methods){
120 if(!$instance->can($method)){
130 Mouse::Util::install_subroutines(scalar caller, $name => $predicate);
137 package Mouse::Util::TypeConstraints;
139 use Scalar::Util qw(blessed looks_like_number openhandle);
144 sub Bool { $_[0] ? $_[0] eq '1' : 1 }
145 sub Undef { !defined($_[0]) }
146 sub Defined { defined($_[0]) }
147 sub Value { defined($_[0]) && !ref($_[0]) }
148 sub Num { looks_like_number($_[0]) }
151 looks_like_number($value) && $value =~ /\A [+-]? [0-9]+ \z/xms;
155 return defined($value) && ref(\$value) eq 'SCALAR';
158 sub Ref { ref($_[0]) }
161 return ref($value) eq 'SCALAR'
163 sub ArrayRef { ref($_[0]) eq 'ARRAY' }
164 sub HashRef { ref($_[0]) eq 'HASH' }
165 sub CodeRef { ref($_[0]) eq 'CODE' }
166 sub RegexpRef { ref($_[0]) eq 'Regexp' }
167 sub GlobRef { ref($_[0]) eq 'GLOB' }
170 return openhandle($_[0]) || (blessed($_[0]) && $_[0]->isa("IO::Handle"))
173 sub Object { blessed($_[0]) && blessed($_[0]) ne 'Regexp' }
175 sub ClassName { Mouse::Util::is_class_loaded($_[0]) }
176 sub RoleName { (Mouse::Util::class_of($_[0]) || return 0)->isa('Mouse::Meta::Role') }
178 sub _parameterize_ArrayRef_for {
179 my($type_parameter) = @_;
180 my $check = $type_parameter->_compiled_type_constraint;
183 foreach my $value (@{$_}) {
184 return undef unless $check->($value);
190 sub _parameterize_HashRef_for {
191 my($type_parameter) = @_;
192 my $check = $type_parameter->_compiled_type_constraint;
195 foreach my $value(values %{$_}){
196 return undef unless $check->($value);
202 # 'Maybe' type accepts 'Any', so it requires parameters
203 sub _parameterize_Maybe_for {
204 my($type_parameter) = @_;
205 my $check = $type_parameter->_compiled_type_constraint;
208 return !defined($_) || $check->($_);
212 package Mouse::Meta::Module;
214 sub name { $_[0]->{package} }
216 sub _method_map { $_[0]->{methods} }
217 sub _attribute_map{ $_[0]->{attributes} }
220 my $name = $_[0]->{package};
222 return \%{ $name . '::' };
226 my($self, $name, $code) = @_;
229 $self->throw_error('You must pass a defined name');
232 $self->throw_error('You must pass a defined code');
235 if(ref($code) ne 'CODE'){
236 $code = \&{$code}; # coerce
239 $self->{methods}->{$name} = $code; # Moose stores meta object here.
241 Mouse::Util::install_subroutines($self->name,
247 package Mouse::Meta::Class;
249 use Mouse::Meta::Method::Constructor;
250 use Mouse::Meta::Method::Destructor;
252 sub method_metaclass { $_[0]->{method_metaclass} || 'Mouse::Meta::Method' }
253 sub attribute_metaclass { $_[0]->{attribute_metaclass} || 'Mouse::Meta::Attribute' }
255 sub constructor_class { $_[0]->{constructor_class} || 'Mouse::Meta::Method::Constructor' }
256 sub destructor_class { $_[0]->{destructor_class} || 'Mouse::Meta::Method::Destructor' }
259 return exists $_[0]->{anon_serial_id};
262 sub roles { $_[0]->{roles} }
264 sub linearized_isa { @{ get_linear_isa($_[0]->{package}) } }
266 sub get_all_attributes {
268 my %attrs = map { %{ $self->initialize($_)->{attributes} } } reverse $self->linearized_isa;
269 return values %attrs;
274 my %args = (@_ == 1 ? %{$_[0]} : @_);
276 my $object = bless {}, $self->name;
278 $self->_initialize_object($object, \%args);
282 sub _initialize_object{
283 my($self, $object, $args, $ignore_triggers) = @_;
287 foreach my $attribute ($self->get_all_attributes) {
288 my $init_arg = $attribute->init_arg;
289 my $slot = $attribute->name;
291 if (defined($init_arg) && exists($args->{$init_arg})) {
292 $object->{$slot} = $attribute->_coerce_and_verify($args->{$init_arg}, $object);
294 weaken($object->{$slot})
295 if ref($object->{$slot}) && $attribute->is_weak_ref;
297 if ($attribute->has_trigger) {
298 push @triggers_queue, [ $attribute->trigger, $object->{$slot} ];
302 if ($attribute->has_default || $attribute->has_builder) {
303 if (!$attribute->is_lazy) {
304 my $default = $attribute->default;
305 my $builder = $attribute->builder;
306 my $value = $builder ? $object->$builder()
307 : ref($default) eq 'CODE' ? $object->$default()
310 $object->{$slot} = $attribute->_coerce_and_verify($value, $object);
312 weaken($object->{$slot})
313 if ref($object->{$slot}) && $attribute->is_weak_ref;
316 elsif($attribute->is_required) {
317 $self->throw_error("Attribute (".$attribute->name.") is required");
322 if(!$ignore_triggers){
323 foreach my $trigger_and_value(@triggers_queue){
324 my($trigger, $value) = @{$trigger_and_value};
325 $trigger->($object, $value);
329 if($self->is_anon_class){
330 $object->{__METACLASS__} = $self;
336 sub is_immutable { $_[0]->{is_immutable} }
338 sub __strict_constructor{ $_[0]->{strict_constructor} }
340 package Mouse::Meta::Role;
342 sub method_metaclass{ $_[0]->{method_metaclass} || 'Mouse::Meta::Role::Method' }
345 return exists $_[0]->{anon_serial_id};
348 sub get_roles { $_[0]->{roles} }
350 sub add_before_method_modifier {
351 my ($self, $method_name, $method) = @_;
353 push @{ $self->{before_method_modifiers}{$method_name} ||= [] }, $method;
356 sub add_around_method_modifier {
357 my ($self, $method_name, $method) = @_;
359 push @{ $self->{around_method_modifiers}{$method_name} ||= [] }, $method;
362 sub add_after_method_modifier {
363 my ($self, $method_name, $method) = @_;
365 push @{ $self->{after_method_modifiers}{$method_name} ||= [] }, $method;
369 sub get_before_method_modifiers {
370 my ($self, $method_name) = @_;
371 return @{ $self->{before_method_modifiers}{$method_name} ||= [] }
373 sub get_around_method_modifiers {
374 my ($self, $method_name) = @_;
375 return @{ $self->{around_method_modifiers}{$method_name} ||= [] }
377 sub get_after_method_modifiers {
378 my ($self, $method_name) = @_;
379 return @{ $self->{after_method_modifiers}{$method_name} ||= [] }
382 package Mouse::Meta::Attribute;
384 require Mouse::Meta::Method::Accessor;
386 sub accessor_metaclass{ $_[0]->{accessor_metaclass} || 'Mouse::Meta::Method::Accessor' }
390 sub name { $_[0]->{name} }
391 sub associated_class { $_[0]->{associated_class} }
393 sub accessor { $_[0]->{accessor} }
394 sub reader { $_[0]->{reader} }
395 sub writer { $_[0]->{writer} }
396 sub predicate { $_[0]->{predicate} }
397 sub clearer { $_[0]->{clearer} }
398 sub handles { $_[0]->{handles} }
400 sub _is_metadata { $_[0]->{is} }
401 sub is_required { $_[0]->{required} }
402 sub default { $_[0]->{default} }
403 sub is_lazy { $_[0]->{lazy} }
404 sub is_lazy_build { $_[0]->{lazy_build} }
405 sub is_weak_ref { $_[0]->{weak_ref} }
406 sub init_arg { $_[0]->{init_arg} }
407 sub type_constraint { $_[0]->{type_constraint} }
409 sub trigger { $_[0]->{trigger} }
410 sub builder { $_[0]->{builder} }
411 sub should_auto_deref { $_[0]->{auto_deref} }
412 sub should_coerce { $_[0]->{coerce} }
414 sub documentation { $_[0]->{documentation} }
418 sub has_accessor { exists $_[0]->{accessor} }
419 sub has_reader { exists $_[0]->{reader} }
420 sub has_writer { exists $_[0]->{writer} }
421 sub has_predicate { exists $_[0]->{predicate} }
422 sub has_clearer { exists $_[0]->{clearer} }
423 sub has_handles { exists $_[0]->{handles} }
425 sub has_default { exists $_[0]->{default} }
426 sub has_type_constraint { exists $_[0]->{type_constraint} }
427 sub has_trigger { exists $_[0]->{trigger} }
428 sub has_builder { exists $_[0]->{builder} }
430 sub has_documentation { exists $_[0]->{documentation} }
432 sub _process_options{
433 my($class, $name, $args) = @_;
435 # taken from Class::MOP::Attribute::new
438 or $class->throw_error('You must provide a name for the attribute');
440 if(!exists $args->{init_arg}){
441 $args->{init_arg} = $name;
444 # 'required' requires eigher 'init_arg', 'builder', or 'default'
445 my $can_be_required = defined( $args->{init_arg} );
447 if(exists $args->{builder}){
449 # Moose refuses a CODE ref builder, but Mouse doesn't for backward compatibility
450 # This feature will be changed in a future. (gfx)
451 $class->throw_error('builder must be a defined scalar value which is a method name')
452 #if ref $args->{builder} || !defined $args->{builder};
453 if !defined $args->{builder};
457 elsif(exists $args->{default}){
458 if(ref $args->{default} && ref($args->{default}) ne 'CODE'){
459 $class->throw_error("References are not allowed as default values, you must "
460 . "wrap the default of '$name' in a CODE reference (ex: sub { [] } and not [])");
465 if( $args->{required} && !$can_be_required ) {
466 $class->throw_error("You cannot have a required attribute ($name) without a default, builder, or an init_arg");
469 # taken from Mouse::Meta::Attribute->new and ->_process_args
471 if(exists $args->{is}){
472 my $is = $args->{is};
475 $args->{reader} ||= $name;
478 if(exists $args->{writer}){
479 $args->{reader} ||= $name;
482 $args->{accessor} ||= $name;
485 elsif($is eq 'bare'){
486 # do nothing, but don't complain (later) about missing methods
489 $is = 'undef' if !defined $is;
490 $class->throw_error("I do not understand this option (is => $is) on attribute ($name)");
495 if(exists $args->{isa}){
496 $tc = $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint($args->{isa});
499 if(exists $args->{does}){
500 if(defined $tc){ # both isa and does supplied
503 eval{ "$tc"->does($args) };
506 $class->throw_error("Cannot have both an isa option and a does option because '$tc' does not do '$args->{does}' on attribute ($name)");
510 $tc = $args->{type_constraint} = Mouse::Util::TypeConstraints::find_or_create_does_type_constraint($args->{does});
516 || $class->throw_error("You cannot have coercion without specifying a type constraint on attribute ($name)");
519 && $class->throw_error("You cannot have a weak reference to a coerced value on attribute ($name)");
522 if ($args->{lazy_build}) {
523 exists($args->{default})
524 && $class->throw_error("You can not use lazy_build and default for the same attribute ($name)");
527 $args->{builder} ||= "_build_${name}";
529 $args->{clearer} ||= "_clear${name}";
530 $args->{predicate} ||= "_has${name}";
533 $args->{clearer} ||= "clear_${name}";
534 $args->{predicate} ||= "has_${name}";
538 if ($args->{auto_deref}) {
540 || $class->throw_error("You cannot auto-dereference without specifying a type constraint on attribute ($name)");
542 ( $tc->is_a_type_of('ArrayRef') || $tc->is_a_type_of('HashRef') )
543 || $class->throw_error("You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute ($name)");
546 if (exists $args->{trigger}) {
547 ('CODE' eq ref $args->{trigger})
548 || $class->throw_error("Trigger must be a CODE ref on attribute ($name)");
552 (exists $args->{default} || defined $args->{builder})
553 || $class->throw_error("You cannot have lazy attribute ($name) without specifying a default value for it");
560 package Mouse::Meta::TypeConstraint;
562 sub name { $_[0]->{name} }
563 sub parent { $_[0]->{parent} }
564 sub message { $_[0]->{message} }
566 sub type_parameter { $_[0]->{type_parameter} }
567 sub _compiled_type_constraint{ $_[0]->{compiled_type_constraint} }
568 sub _compiled_type_coercion { $_[0]->{_compiled_type_coercion} }
570 sub __is_parameterized { exists $_[0]->{type_parameter} }
571 sub has_coercion { exists $_[0]->{_compiled_type_coercion} }
574 sub compile_type_constraint{
579 for(my $parent = $self->{parent}; defined $parent; $parent = $parent->{parent}){
580 if($parent->{hand_optimized_type_constraint}){
581 unshift @checks, $parent->{hand_optimized_type_constraint};
582 last; # a hand optimized constraint must include all the parents
584 elsif($parent->{constraint}){
585 unshift @checks, $parent->{constraint};
590 if($self->{constraint}){
591 push @checks, $self->{constraint};
594 if($self->{type_constraints}){ # Union
595 my @types = map{ $_->{compiled_type_constraint} } @{ $self->{type_constraints} };
597 foreach my $c(@types){
598 return 1 if $c->($_[0]);
605 $self->{compiled_type_constraint} = \&Mouse::Util::TypeConstraints::Any;
608 $self->{compiled_type_constraint} = sub{
611 foreach my $c(@checks){
612 return undef if !$c->(@args);
620 package Mouse::Object;
625 if (scalar @_ == 1) {
626 (ref($_[0]) eq 'HASH')
627 || $class->meta->throw_error("Single parameters to new() must be a HASH ref");
639 $class->meta->throw_error('Cannot call new() on an instance') if ref $class;
641 my $args = $class->BUILDARGS(@_);
643 my $meta = Mouse::Meta::Class->initialize($class);
644 my $self = $meta->new_object($args);
647 if( $self->can('BUILD') ) {
648 for my $class (reverse $meta->linearized_isa) {
649 my $build = Mouse::Util::get_code_ref($class, 'BUILD')
652 $self->$build($args);
662 return unless $self->can('DEMOLISH'); # short circuit
671 # We cannot count on being able to retrieve a previously made
672 # metaclass, _or_ being able to make a new one during global
673 # destruction. However, we should still be able to use mro at
674 # that time (at least tests suggest so ;)
676 foreach my $class (@{ Mouse::Util::get_linear_isa(ref $self) }) {
677 my $demolish = Mouse::Util::get_code_ref($class, 'DEMOLISH')
680 $self->$demolish($Mouse::Util::in_global_destruction);
687 die $e if $e; # rethrow
694 return unless $self->can('BUILD');
696 for my $class (reverse $self->meta->linearized_isa) {
697 my $build = Mouse::Util::get_code_ref($class, 'BUILD')
706 *DEMOLISHALL = \&DESTROY;
713 Mouse::PurePerl - A Mouse guts in pure Perl
717 This document describes Mouse version 0.51