package Mouse::Meta::Class;
-use strict;
-use warnings;
+use Mouse::Util qw/:meta get_linear_isa not_supported/; # enables strict and warnings
use Scalar::Util qw/blessed weaken/;
-use Mouse::Util qw/get_linear_isa not_supported/;
-
-use Mouse::Meta::Method::Constructor;
-use Mouse::Meta::Method::Destructor;
use Mouse::Meta::Module;
+our @ISA = qw(Mouse::Meta::Module);
+
+sub attribute_metaclass;
+sub method_metaclass;
-use base qw(Mouse::Meta::Module);
+sub constructor_class;
+sub destructor_class;
-sub method_metaclass(){ 'Mouse::Meta::Method' } # required for get_method()
+my @MetaClassTypes = qw(
+ attribute_metaclass
+ method_metaclass
+ constructor_class
+ destructor_class
+);
-sub _new {
+sub _construct_meta {
my($class, %args) = @_;
- $args{attributes} ||= {};
- $args{methods} ||= {};
- $args{roles} ||= [];
+ $args{attributes} = {};
+ $args{methods} = {};
+ $args{roles} = [];
$args{superclasses} = do {
no strict 'refs';
\@{ $args{package} . '::ISA' };
};
- #return Mouse::Meta::Class->initialize($class)->new_object(%args)
- # if $class ne __PACKAGE__;
-
- return bless \%args, $class;
+ my $self = bless \%args, ref($class) || $class;
+ if(ref($self) ne __PACKAGE__){
+ $self->meta->_initialize_object($self, \%args);
+ }
+ return $self;
}
sub create_anon_class{
return $self->create(undef, @_);
}
-sub is_anon_class{
- return exists $_[0]->{anon_serial_id};
-}
+sub is_anon_class;
-sub roles { $_[0]->{roles} }
+sub roles;
+
+sub calculate_all_roles {
+ my $self = shift;
+ my %seen;
+ return grep { !$seen{ $_->name }++ }
+ map { $_->calculate_all_roles } @{ $self->roles };
+}
sub superclasses {
my $self = shift;
if (@_) {
- Mouse::load_class($_) for @_;
+ foreach my $super(@_){
+ Mouse::Util::load_class($super);
+ my $meta = Mouse::Util::get_metaclass_by_name($super);
+
+ next if not defined $meta;
+
+ if(Mouse::Util::is_a_metarole($meta)){
+ $self->throw_error("You cannot inherit from a Mouse Role ($super)");
+ }
+
+ next if $self->isa(ref $meta); # _superclass_meta_is_compatible
+
+ $self->_reconcile_with_superclass_meta($meta);
+ }
@{ $self->{superclasses} } = @_;
}
- @{ $self->{superclasses} };
+ return @{ $self->{superclasses} };
}
-sub get_all_method_names {
- my $self = shift;
- my %uniq;
- return grep { $uniq{$_}++ == 0 }
- map { Mouse::Meta::Class->initialize($_)->get_method_list() }
- $self->linearized_isa;
-}
+sub _reconcile_with_superclass_meta {
+ my($self, $super_meta) = @_;
-sub add_attribute {
- my $self = shift;
+ # find incompatible traits
+ my @incompatibles;
+ foreach my $metaclass_type(@MetaClassTypes){
+ my $super_c = $super_meta->$metaclass_type();
+ my $self_c = $self->$metaclass_type();
- if (@_ == 1 && blessed($_[0])) {
- my $attr = shift @_;
- $self->{'attributes'}{$attr->name} = $attr;
- }
- else {
- my $names = shift @_;
- $names = [$names] if !ref($names);
- my $metaclass = 'Mouse::Meta::Attribute';
- my %options = (@_ == 1 ? %{$_[0]} : @_);
-
- if ( my $metaclass_name = delete $options{metaclass} ) {
- my $new_class = Mouse::Util::resolve_metaclass_alias(
- 'Attribute',
- $metaclass_name
- );
- if ( $metaclass ne $new_class ) {
- $metaclass = $new_class;
- }
+ if(!$super_c->isa($self_c)){
+ push @incompatibles, ($metaclass_type => $super_c);
}
+ }
- for my $name (@$names) {
- if ($name =~ s/^\+//) {
- $metaclass->clone_parent($self, $name, %options);
- }
- else {
- $metaclass->create($self, $name, %options);
- }
+ my @roles;
+ foreach my $role($super_meta->meta->calculate_all_roles){
+ if(!$self->meta->does_role($role->name)){
+ push @roles, $role->name;
}
}
-}
-sub compute_all_applicable_attributes { shift->get_all_attributes(@_) }
-sub get_all_attributes {
- my $self = shift;
- my (@attr, %seen);
+ #print "reconcile($self vs. $super_meta; @roles; @incompatibles)\n";
- for my $class ($self->linearized_isa) {
- my $meta = $self->_metaclass_cache($class)
- or next;
+ require Mouse::Util::MetaRole;
+ Mouse::Util::MetaRole::apply_metaclass_roles(
+ for_class => $self,
+ metaclass => ref $super_meta,
+ metaclass_roles => \@roles,
+ @incompatibles,
+ );
+ return;
+}
- for my $name (keys %{ $meta->get_attribute_map }) {
- next if $seen{$name}++;
- push @attr, $meta->get_attribute($name);
- }
+sub find_method_by_name{
+ my($self, $method_name) = @_;
+ defined($method_name)
+ or $self->throw_error('You must define a method name to find');
+
+ foreach my $class( $self->linearized_isa ){
+ my $method = $self->initialize($class)->get_method($method_name);
+ return $method if defined $method;
}
+ return undef;
+}
- return @attr;
+sub get_all_methods {
+ my($self) = @_;
+ return map{ $self->find_method_by_name($_) } $self->get_all_method_names;
}
-sub linearized_isa { @{ get_linear_isa($_[0]->name) } }
+sub get_all_method_names {
+ my $self = shift;
+ my %uniq;
+ return grep { $uniq{$_}++ == 0 }
+ map { Mouse::Meta::Class->initialize($_)->get_method_list() }
+ $self->linearized_isa;
+}
-sub new_object {
+sub find_attribute_by_name{
+ my($self, $name) = @_;
+ my $attr;
+ foreach my $class($self->linearized_isa){
+ my $meta = Mouse::Util::get_metaclass_by_name($class) or next;
+ $attr = $meta->get_attribute($name) and last;
+ }
+ return $attr;
+}
+
+sub add_attribute {
my $self = shift;
- my %args = (@_ == 1 ? %{$_[0]} : @_);
- my $instance = bless {}, $self->name;
+ my($attr, $name);
- my @triggers_queue;
+ if(blessed $_[0]){
+ $attr = $_[0];
- foreach my $attribute ($self->get_all_attributes) {
- my $from = $attribute->init_arg;
- my $key = $attribute->name;
+ $attr->isa('Mouse::Meta::Attribute')
+ || $self->throw_error("Your attribute must be an instance of Mouse::Meta::Attribute (or a subclass)");
- if (defined($from) && exists($args{$from})) {
- $args{$from} = $attribute->coerce_constraint($args{$from})
- if $attribute->should_coerce;
- $attribute->verify_against_type_constraint($args{$from});
+ $name = $attr->name;
+ }
+ else{
+ # _process_attribute
+ $name = shift;
- $instance->{$key} = $args{$from};
+ my %args = (@_ == 1) ? %{$_[0]} : @_;
- weaken($instance->{$key})
- if ref($instance->{$key}) && $attribute->is_weak_ref;
+ defined($name)
+ or $self->throw_error('You must provide a name for the attribute');
- if ($attribute->has_trigger) {
- push @triggers_queue, [ $attribute->trigger, $args{$from} ];
- }
+ if ($name =~ s/^\+//) { # inherited attributes
+ my $inherited_attr = $self->find_attribute_by_name($name)
+ or $self->throw_error("Could not find an attribute by the name of '$name' to inherit from in ".$self->name);
+
+ $attr = $inherited_attr->clone_and_inherit_options(%args);
}
- else {
- if ($attribute->has_default || $attribute->has_builder) {
- unless ($attribute->is_lazy) {
- my $default = $attribute->default;
- my $builder = $attribute->builder;
- my $value = $attribute->has_builder
- ? $instance->$builder
- : ref($default) eq 'CODE'
- ? $default->($instance)
- : $default;
-
- $value = $attribute->coerce_constraint($value)
- if $attribute->should_coerce;
- $attribute->verify_against_type_constraint($value);
-
- $instance->{$key} = $value;
-
- weaken($instance->{$key})
- if ref($instance->{$key}) && $attribute->is_weak_ref;
- }
- }
- else {
- if ($attribute->is_required) {
- $self->throw_error("Attribute (".$attribute->name.") is required");
- }
- }
+ else{
+ my($attribute_class, @traits) = $self->attribute_metaclass->interpolate_class(\%args);
+ $args{traits} = \@traits if @traits;
+
+ $attr = $attribute_class->new($name, %args);
}
}
- foreach my $trigger_and_value(@triggers_queue){
- my($trigger, $value) = @{$trigger_and_value};
- $trigger->($instance, $value);
+ weaken( $attr->{associated_class} = $self );
+
+ $self->{attributes}{$attr->name} = $attr;
+ $attr->install_accessors();
+
+ if(Mouse::Util::_MOUSE_VERBOSE && !$attr->{associated_methods} && ($attr->{is} || '') ne 'bare'){
+ Carp::cluck(qq{Attribute (}.$attr->name.qq{) of class }.$self->name.qq{ has no associated methods (did you mean to provide an "is" argument?)});
}
+ return $attr;
+}
- return $instance;
+sub compute_all_applicable_attributes { # DEPRECATED
+ Carp::cluck('compute_all_applicable_attributes() has been deprecated. Use get_all_attributes() instead');
+
+ return shift->get_all_attributes(@_)
}
+sub linearized_isa;
+
+sub new_object;
+
sub clone_object {
- my $class = shift;
- my $instance = shift;
+ my $class = shift;
+ my $object = shift;
+ my $args = $object->Mouse::Object::BUILDARGS(@_);
- (blessed($instance) && $instance->isa($class->name))
- || $class->throw_error("You must pass an instance of the metaclass (" . $class->name . "), not ($instance)");
+ (blessed($object) && $object->isa($class->name))
+ || $class->throw_error("You must pass an instance of the metaclass (" . $class->name . "), not ($object)");
- $class->clone_instance($instance, @_);
+ my $cloned = bless { %$object }, ref $object;
+ $class->_initialize_object($cloned, $args);
+
+ return $cloned;
}
-sub clone_instance {
+sub clone_instance { # DEPRECATED
my ($class, $instance, %params) = @_;
- (blessed($instance))
- || $class->throw_error("You can only clone instances, ($instance) is not a blessed instance");
+ Carp::cluck('clone_instance() has been deprecated. Use clone_object() instead');
- my $clone = bless { %$instance }, ref $instance;
+ return $class->clone_object($instance, %params);
+}
- foreach my $attr ($class->get_all_attributes()) {
- if ( defined( my $init_arg = $attr->init_arg ) ) {
- if (exists $params{$init_arg}) {
- $clone->{ $attr->name } = $params{$init_arg};
- }
- }
- }
- return $clone;
+sub immutable_options {
+ my ( $self, @args ) = @_;
+ return (
+ inline_constructor => 1,
+ inline_destructor => 1,
+ constructor_name => 'new',
+ @args,
+ );
}
+
sub make_immutable {
my $self = shift;
- my %args = (
- inline_constructor => 1,
- inline_destructor => 1,
- @_,
- );
+ my %args = $self->immutable_options(@_);
$self->{is_immutable}++;
if ($args{inline_constructor}) {
- $self->add_method('new' => Mouse::Meta::Method::Constructor->generate_constructor_method_inline( $self ));
+ my $c = $self->constructor_class;
+ Mouse::Util::load_class($c);
+ $self->add_method($args{constructor_name} =>
+ $c->_generate_constructor($self, \%args));
}
if ($args{inline_destructor}) {
- $self->add_method('DESTROY' => Mouse::Meta::Method::Destructor->generate_destructor_method_inline( $self ));
+ my $c = $self->destructor_class;
+ Mouse::Util::load_class($c);
+ $self->add_method(DESTROY =>
+ $c->_generate_destructor($self, \%args));
}
# Moose's make_immutable returns true allowing calling code to skip setting an explicit true value
return 1;
}
-sub make_mutable { not_supported }
+sub make_mutable {
+ my($self) = @_;
+ $self->{is_immutable} = 0;
+ return;
+}
+
+sub is_immutable;
+sub is_mutable { !$_[0]->is_immutable }
+
+sub _install_modifier_pp{
+ my( $self, $type, $name, $code ) = @_;
+ my $into = $self->name;
-sub is_immutable { $_[0]->{is_immutable} }
-sub is_mutable { !$_[0]->{is_immutable} }
+ my $original = $into->can($name)
+ or $self->throw_error("The method '$name' is not found in the inheritance hierarchy for class $into");
+
+ my $modifier_table = $self->{modifiers}{$name};
+
+ if(!$modifier_table){
+ my(@before, @after, @around, $cache, $modified);
+
+ $cache = $original;
+
+ $modified = sub {
+ for my $c (@before) { $c->(@_) }
+
+ if(wantarray){ # list context
+ my @rval = $cache->(@_);
+
+ for my $c(@after){ $c->(@_) }
+ return @rval;
+ }
+ elsif(defined wantarray){ # scalar context
+ my $rval = $cache->(@_);
+
+ for my $c(@after){ $c->(@_) }
+ return $rval;
+ }
+ else{ # void context
+ $cache->(@_);
+
+ for my $c(@after){ $c->(@_) }
+ return;
+ }
+ };
+
+ $self->{modifiers}{$name} = $modifier_table = {
+ original => $original,
+
+ before => \@before,
+ after => \@after,
+ around => \@around,
+
+ cache => \$cache, # cache for around modifiers
+ };
+
+ $self->add_method($name => $modified);
+ }
+
+ if($type eq 'before'){
+ unshift @{$modifier_table->{before}}, $code;
+ }
+ elsif($type eq 'after'){
+ push @{$modifier_table->{after}}, $code;
+ }
+ else{ # around
+ push @{$modifier_table->{around}}, $code;
+
+ my $next = ${ $modifier_table->{cache} };
+ ${ $modifier_table->{cache} } = sub{ $code->($next, @_) };
+ }
+
+ return;
+}
sub _install_modifier {
- my ( $self, $into, $type, $name, $code ) = @_;
-
- # which is modifer class available?
- my $modifier_class = do {
- if (eval "require Class::Method::Modifiers::Fast; 1") {
- 'Class::Method::Modifiers::Fast';
- } elsif (eval "require Class::Method::Modifiers; 1") {
- 'Class::Method::Modifiers';
- } else {
- Carp::croak("Method modifiers require the use of Class::Method::Modifiers or Class::Method::Modifiers::Fast. Please install it from CPAN and file a bug report with this application.");
- }
+ my ( $self, $type, $name, $code ) = @_;
+
+ # load Class::Method::Modifiers first
+ my $no_cmm_fast = do{
+ local $@;
+ eval q{ use Class::Method::Modifiers::Fast 0.041 () };
+ $@;
};
- my $modifier = $modifier_class->can('_install_modifier');
+
+ my $impl;
+ if($no_cmm_fast){
+ $impl = \&_install_modifier_pp;
+ }
+ else{
+ my $install_modifier = Class::Method::Modifiers::Fast->can('install_modifier');
+ $impl = sub {
+ my ( $self, $type, $name, $code ) = @_;
+ my $into = $self->name;
+ $install_modifier->($into, $type, $name, $code);
+
+ $self->add_method($name => do{
+ no strict 'refs';
+ \&{ $into . '::' . $name };
+ });
+ return;
+ };
+ }
# replace this method itself :)
{
no warnings 'redefine';
- *_install_modifier = sub {
- my ( $self, $into, $type, $name, $code ) = @_;
- $modifier->(
- $into,
- $type,
- $name,
- $code
- );
- $self->{methods}{$name}++; # register it to the method map
- return;
- };
+ *_install_modifier = $impl;
}
- # call me. for first time.
- $self->_install_modifier( $into, $type, $name, $code );
+ $self->$impl( $type, $name, $code );
}
sub add_before_method_modifier {
my ( $self, $name, $code ) = @_;
- $self->_install_modifier( $self->name, 'before', $name, $code );
+ $self->_install_modifier( 'before', $name, $code );
}
sub add_around_method_modifier {
my ( $self, $name, $code ) = @_;
- $self->_install_modifier( $self->name, 'around', $name, $code );
+ $self->_install_modifier( 'around', $name, $code );
}
sub add_after_method_modifier {
my ( $self, $name, $code ) = @_;
- $self->_install_modifier( $self->name, 'after', $name, $code );
+ $self->_install_modifier( 'after', $name, $code );
}
sub add_override_method_modifier {
my ($self, $name, $code) = @_;
+ if($self->has_method($name)){
+ $self->throw_error("Cannot add an override method if a local method is already present");
+ }
+
my $package = $self->name;
- my $body = $package->can($name)
+ my $super_body = $package->can($name)
or $self->throw_error("You cannot override '$name' because it has no super method");
- $self->add_method($name => sub { $code->($package, $body, @_) });
+ $self->add_method($name => sub {
+ local $Mouse::SUPER_PACKAGE = $package;
+ local $Mouse::SUPER_BODY = $super_body;
+ local @Mouse::SUPER_ARGS = @_;
+
+ $code->(@_);
+ });
+ return;
+}
+
+sub add_augment_method_modifier {
+ my ($self, $name, $code) = @_;
+ if($self->has_method($name)){
+ $self->throw_error("Cannot add an augment method if a local method is already present");
+ }
+
+ my $super = $self->find_method_by_name($name)
+ or $self->throw_error("You cannot augment '$name' because it has no super method");
+
+ my $super_package = $super->package_name;
+ my $super_body = $super->body;
+
+ $self->add_method($name => sub{
+ local $Mouse::INNER_BODY{$super_package} = $code;
+ local $Mouse::INNER_ARGS{$super_package} = [@_];
+ $super_body->(@_);
+ });
+ return;
}
sub does_role {
|| $self->throw_error("You must supply a role name to look for");
for my $class ($self->linearized_isa) {
- my $meta = Mouse::Meta::Module::class_of($class);
- next unless $meta && $meta->can('roles');
+ my $meta = Mouse::Util::get_metaclass_by_name($class)
+ or next;
for my $role (@{ $meta->roles }) {
}
1;
-
__END__
=head1 NAME
-Mouse::Meta::Class - hook into the Mouse MOP
+Mouse::Meta::Class - The Mouse class metaclass
-=head1 METHODS
+=head1 VERSION
-=head2 initialize ClassName -> Mouse::Meta::Class
+This document describes Mouse version 0.49
-Finds or creates a Mouse::Meta::Class instance for the given ClassName. Only
-one instance should exist for a given class.
+=head1 METHODS
-=head2 new %args -> Mouse::Meta::Class
+=head2 C<< initialize(ClassName) -> Mouse::Meta::Class >>
-Creates a new Mouse::Meta::Class. Don't call this directly.
+Finds or creates a C<Mouse::Meta::Class> instance for the given ClassName. Only
+one instance should exist for a given class.
-=head2 name -> ClassName
+=head2 C<< name -> ClassName >>
Returns the name of the owner class.
-=head2 superclasses -> [ClassName]
+=head2 C<< superclasses -> ClassNames >> C<< superclass(ClassNames) >>
Gets (or sets) the list of superclasses of the owner class.
-=head2 add_attribute (Mouse::Meta::Attribute| name => spec)
+=head2 C<< add_method(name => CodeRef) >>
+
+Adds a method to the owner class.
+
+=head2 C<< has_method(name) -> Bool >>
+
+Returns whether we have a method with the given name.
+
+=head2 C<< get_method(name) -> Mouse::Meta::Method | undef >>
+
+Returns a L<Mouse::Meta::Method> with the given name.
+
+Note that you can also use C<< $metaclass->name->can($name) >> for a method body.
+
+=head2 C<< get_method_list -> Names >>
+
+Returns a list of method names which are defined in the local class.
+If you want a list of all applicable methods for a class, use the
+C<get_all_methods> method.
+
+=head2 C<< get_all_methods -> (Mouse::Meta::Method) >>
+
+Return the list of all L<Mouse::Meta::Method> instances associated with
+the class and its superclasses.
+
+=head2 C<< add_attribute(name => spec | Mouse::Meta::Attribute) >>
Begins keeping track of the existing L<Mouse::Meta::Attribute> for the owner
class.
-=head2 get_all_attributes -> (Mouse::Meta::Attribute)
+=head2 C<< has_attribute(Name) -> Bool >>
-Returns the list of all L<Mouse::Meta::Attribute> instances associated with
-this class and its superclasses.
+Returns whether we have a L<Mouse::Meta::Attribute> with the given name.
-=head2 get_attribute_map -> { name => Mouse::Meta::Attribute }
+=head2 C<< get_attribute Name -> Mouse::Meta::Attribute | undef >>
-Returns a mapping of attribute names to their corresponding
-L<Mouse::Meta::Attribute> objects.
+Returns the L<Mouse::Meta::Attribute> with the given name.
-=head2 get_attribute_list -> { name => Mouse::Meta::Attribute }
+=head2 C<< get_attribute_list -> Names >>
-This returns a list of attribute names which are defined in the local
+Returns a list of attribute names which are defined in the local
class. If you want a list of all applicable attributes for a class,
use the C<get_all_attributes> method.
-=head2 has_attribute Name -> Bool
+=head2 C<< get_all_attributes -> (Mouse::Meta::Attribute) >>
-Returns whether we have a L<Mouse::Meta::Attribute> with the given name.
+Returns the list of all L<Mouse::Meta::Attribute> instances associated with
+this class and its superclasses.
-=head2 get_attribute Name -> Mouse::Meta::Attribute | undef
+=head2 C<< linearized_isa -> [ClassNames] >>
-Returns the L<Mouse::Meta::Attribute> with the given name.
+Returns the list of classes in method dispatch order, with duplicates removed.
-=head2 linearized_isa -> [ClassNames]
+=head2 C<< new_object(Parameters) -> Instance >>
-Returns the list of classes in method dispatch order, with duplicates removed.
+Creates a new instance.
-=head2 clone_object Instance -> Instance
+=head2 C<< clone_object(Instance, Parameters) -> Instance >>
-Clones the given C<Instance> which must be an instance governed by this
+Clones the given instance which must be an instance governed by this
metaclass.
-=head2 clone_instance Instance, Parameters -> Instance
+=head2 C<< throw_error(Message, Parameters) >>
+
+Throws an error with the given message.
+
+=head1 SEE ALSO
+
+L<Mouse::Meta::Module>
+
+L<Moose::Meta::Class>
-The clone_instance method has been made private.
-The public version is deprecated.
+L<Class::MOP::Class>
=cut
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