use Class::MOP;
-use Carp ();
+use Carp qw( confess );
use Data::OptList;
use List::Util qw( first );
use List::MoreUtils qw( any all uniq first_index );
use Scalar::Util 'weaken', 'blessed';
-our $VERSION = '1.03';
-$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
use Moose::Meta::Method::Overridden;
use Moose::Meta::Class::Immutable::Trait;
use Moose::Meta::Method::Constructor;
use Moose::Meta::Method::Destructor;
+use Moose::Meta::Method::Meta;
+use Moose::Util;
+use Class::MOP::MiniTrait;
use base 'Class::MOP::Class';
+Class::MOP::MiniTrait::apply(__PACKAGE__, 'Moose::Meta::Object::Trait');
+
__PACKAGE__->meta->add_attribute('roles' => (
reader => 'roles',
default => sub { [] }
);
}
-sub _immutable_options {
- my ( $self, @args ) = @_;
-
- $self->SUPER::_immutable_options(
- inline_destructor => 1,
-
- # Moose always does this when an attribute is created
- inline_accessors => 0,
-
- @args,
- );
-}
-
sub create {
my ($class, $package_name, %options) = @_;
return $new_meta;
}
-sub _check_metaclass_compatibility {
- my $self = shift;
-
- if ( my @supers = $self->superclasses ) {
- $self->_fix_metaclass_incompatibility(@supers);
- }
-
- $self->SUPER::_check_metaclass_compatibility(@_);
-}
-
my %ANON_CLASSES;
sub create_anon_class {
return $ANON_CLASSES{$cache_key};
}
+ $options{weaken} = !$cache_ok
+ unless exists $options{weaken};
+
my $new_class = $self->SUPER::create_anon_class(%options);
- $ANON_CLASSES{$cache_key} = $new_class
- if $cache_ok;
+ if ($cache_ok) {
+ $ANON_CLASSES{$cache_key} = $new_class;
+ weaken($ANON_CLASSES{$cache_key});
+ }
return $new_class;
}
+sub _meta_method_class { 'Moose::Meta::Method::Meta' }
+
sub _anon_cache_key {
# Makes something like Super::Class|Super::Class::2=Role|Role::1
return join '=' => (
delete $ANON_CLASSES{$cache_key};
$ANON_CLASSES{$new_cache_key} = $new_meta;
+ weaken($ANON_CLASSES{$new_cache_key});
return $new_meta;
}
grep { !$seen{$_->name}++ } map { $_->calculate_all_roles } @{ $self->roles };
}
+sub calculate_all_roles_with_inheritance {
+ my $self = shift;
+ my %seen;
+ grep { !$seen{$_->name}++ }
+ map { Class::MOP::class_of($_)->can('calculate_all_roles')
+ ? Class::MOP::class_of($_)->calculate_all_roles
+ : () }
+ $self->linearized_isa;
+}
+
sub does_role {
my ($self, $role_name) = @_;
return $object;
}
+sub _generate_fallback_constructor {
+ my $self = shift;
+ my ($class) = @_;
+ return $class . '->Moose::Object::new(@_)'
+}
+
+sub _inline_params {
+ my $self = shift;
+ my ($params, $class) = @_;
+ return (
+ 'my ' . $params . ' = ',
+ $self->_inline_BUILDARGS($class, '@_'),
+ ';',
+ );
+}
+
+sub _inline_BUILDARGS {
+ my $self = shift;
+ my ($class, $args) = @_;
+
+ my $buildargs = $self->find_method_by_name("BUILDARGS");
+
+ if ($args eq '@_'
+ && (!$buildargs or $buildargs->body == \&Moose::Object::BUILDARGS)) {
+ return (
+ 'do {',
+ 'my $params;',
+ 'if (scalar @_ == 1) {',
+ 'if (!defined($_[0]) || ref($_[0]) ne \'HASH\') {',
+ $self->_inline_throw_error(
+ '"Single parameters to new() must be a HASH ref"',
+ 'data => $_[0]',
+ ) . ';',
+ '}',
+ '$params = { %{ $_[0] } };',
+ '}',
+ 'elsif (@_ % 2) {',
+ 'Carp::carp(',
+ '"The new() method for ' . $class . ' expects a '
+ . 'hash reference or a key/value list. You passed an '
+ . 'odd number of arguments"',
+ ');',
+ '$params = {@_, undef};',
+ '}',
+ 'else {',
+ '$params = {@_};',
+ '}',
+ '$params;',
+ '}',
+ );
+ }
+ else {
+ return $class . '->BUILDARGS(' . $args . ')';
+ }
+}
+
+sub _inline_slot_initializer {
+ my $self = shift;
+ my ($attr, $idx) = @_;
+
+ return (
+ '## ' . $attr->name,
+ $self->_inline_check_required_attr($attr),
+ $self->SUPER::_inline_slot_initializer(@_),
+ );
+}
+
+sub _inline_check_required_attr {
+ my $self = shift;
+ my ($attr) = @_;
+
+ return unless defined $attr->init_arg;
+ return unless $attr->can('is_required') && $attr->is_required;
+ return if $attr->has_default || $attr->has_builder;
+
+ return (
+ 'if (!exists $params->{\'' . $attr->init_arg . '\'}) {',
+ $self->_inline_throw_error(
+ '"Attribute (' . quotemeta($attr->name) . ') is required"'
+ ) . ';',
+ '}',
+ );
+}
+
+# XXX: these two are duplicated from cmop, because we have to pass the tc stuff
+# through to _inline_set_value - this should probably be fixed, but i'm not
+# quite sure how. -doy
+sub _inline_init_attr_from_constructor {
+ my $self = shift;
+ my ($attr, $idx) = @_;
+
+ my @initial_value = $attr->_inline_set_value(
+ '$instance',
+ '$params->{\'' . $attr->init_arg . '\'}',
+ '$type_constraint_bodies[' . $idx . ']',
+ '$type_constraints[' . $idx . ']',
+ 'for constructor',
+ );
+
+ push @initial_value, (
+ '$attrs->[' . $idx . ']->set_initial_value(',
+ '$instance,',
+ $attr->_inline_instance_get('$instance'),
+ ');',
+ ) if $attr->has_initializer;
+
+ return @initial_value;
+}
+
+sub _inline_init_attr_from_default {
+ my $self = shift;
+ my ($attr, $idx) = @_;
+
+ my $default = $self->_inline_default_value($attr, $idx);
+ return unless $default;
+
+ my @initial_value = (
+ 'my $default = ' . $default . ';',
+ $attr->_inline_set_value(
+ '$instance',
+ '$default',
+ '$type_constraint_bodies[' . $idx . ']',
+ '$type_constraints[' . $idx . ']',
+ 'for constructor',
+ ),
+ );
+
+ push @initial_value, (
+ '$attrs->[' . $idx . ']->set_initial_value(',
+ '$instance,',
+ $attr->_inline_instance_get('$instance'),
+ ');',
+ ) if $attr->has_initializer;
+
+ return @initial_value;
+}
+
+sub _inline_extra_init {
+ my $self = shift;
+ return (
+ $self->_inline_triggers,
+ $self->_inline_BUILDALL,
+ );
+}
+
+sub _inline_triggers {
+ my $self = shift;
+ my @trigger_calls;
+
+ my @attrs = sort { $a->name cmp $b->name } $self->get_all_attributes;
+ for my $i (0 .. $#attrs) {
+ my $attr = $attrs[$i];
+
+ next unless $attr->can('has_trigger') && $attr->has_trigger;
+
+ my $init_arg = $attr->init_arg;
+ next unless defined $init_arg;
+
+ push @trigger_calls,
+ 'if (exists $params->{\'' . $init_arg . '\'}) {',
+ '$attrs->[' . $i . ']->trigger->(',
+ '$instance,',
+ $attr->_inline_instance_get('$instance') . ',',
+ ');',
+ '}';
+ }
+
+ return @trigger_calls;
+}
+
+sub _inline_BUILDALL {
+ my $self = shift;
+
+ my @methods = reverse $self->find_all_methods_by_name('BUILD');
+ my @BUILD_calls;
+
+ foreach my $method (@methods) {
+ push @BUILD_calls,
+ '$instance->' . $method->{class} . '::BUILD($params);';
+ }
+
+ return @BUILD_calls;
+}
+
sub superclasses {
my $self = shift;
my $supers = Data::OptList::mkopt(\@_);
return undef;
}
-sub _fix_metaclass_incompatibility {
- my ($self, @superclasses) = @_;
-
- $self->_fix_one_incompatible_metaclass($_)
- for map { Moose::Meta::Class->initialize($_) } @superclasses;
-}
-
-sub _fix_one_incompatible_metaclass {
- my ($self, $meta) = @_;
-
- return if $self->_superclass_meta_is_compatible($meta);
-
- unless ( $self->is_pristine ) {
- $self->throw_error(
- "Cannot attempt to reinitialize metaclass for "
- . $self->name
- . ", it isn't pristine" );
- }
-
- $self->_reconcile_with_superclass_meta($meta);
-}
-
-sub _superclass_meta_is_compatible {
- my ($self, $super_meta) = @_;
-
- next unless $super_meta->isa("Class::MOP::Class");
-
- my $super_meta_name
- = $super_meta->is_immutable
- ? $super_meta->_get_mutable_metaclass_name
- : ref($super_meta);
-
- return 1
- if $self->isa($super_meta_name)
- and
- $self->instance_metaclass->isa( $super_meta->instance_metaclass );
-}
+## Metaclass compatibility
-# I don't want to have to type this >1 time
-my @MetaClassTypes =
- qw( attribute_metaclass
- method_metaclass
- wrapped_method_metaclass
- instance_metaclass
- constructor_class
- destructor_class
- error_class );
-
-sub _reconcile_with_superclass_meta {
- my ($self, $super_meta) = @_;
-
- my $super_meta_name
- = $super_meta->is_immutable
- ? $super_meta->_get_mutable_metaclass_name
- : ref($super_meta);
-
- my $self_metaclass = ref $self;
-
- # If neither of these is true we have a more serious
- # incompatibility that we just cannot fix (yet?).
- if ( $super_meta_name->isa( ref $self )
- && all { $super_meta->$_->isa( $self->$_ ) } @MetaClassTypes ) {
- $self->_reinitialize_with($super_meta);
- }
- elsif ( $self->_all_metaclasses_differ_by_roles_only($super_meta) ) {
- $self->_reconcile_role_differences($super_meta);
+sub _base_metaclasses {
+ my $self = shift;
+ my %metaclasses = $self->SUPER::_base_metaclasses;
+ for my $class (keys %metaclasses) {
+ $metaclasses{$class} =~ s/^Class::MOP/Moose::Meta/;
}
-}
-
-sub _reinitialize_with {
- my ( $self, $new_meta ) = @_;
-
- my $new_self = $new_meta->reinitialize(
- $self->name,
- attribute_metaclass => $new_meta->attribute_metaclass,
- method_metaclass => $new_meta->method_metaclass,
- instance_metaclass => $new_meta->instance_metaclass,
+ return (
+ %metaclasses,
+ error_class => 'Moose::Error::Default',
);
-
- $new_self->$_( $new_meta->$_ )
- for qw( constructor_class destructor_class error_class );
-
- %$self = %$new_self;
-
- bless $self, ref $new_self;
-
- # We need to replace the cached metaclass instance or else when it
- # goes out of scope Class::MOP::Class destroy's the namespace for
- # the metaclass's class, causing much havoc.
- Class::MOP::store_metaclass_by_name( $self->name, $self );
- Class::MOP::weaken_metaclass( $self->name ) if $self->is_anon_class;
-}
-
-# In the more complex case, we share a common ancestor with our
-# superclass's metaclass, but each metaclass (ours and the parent's)
-# has a different set of roles applied. We reconcile this by first
-# reinitializing into the parent class, and _then_ applying our own
-# roles.
-sub _all_metaclasses_differ_by_roles_only {
- my ($self, $super_meta) = @_;
-
- for my $pair (
- [ ref $self, ref $super_meta ],
- map { [ $self->$_, $super_meta->$_ ] } @MetaClassTypes
- ) {
-
- next if $pair->[0] eq $pair->[1];
-
- my $self_meta_meta = Class::MOP::Class->initialize( $pair->[0] );
- my $super_meta_meta = Class::MOP::Class->initialize( $pair->[1] );
-
- my $common_ancestor
- = _find_common_ancestor( $self_meta_meta, $super_meta_meta );
-
- return unless $common_ancestor;
-
- return
- unless _is_role_only_subclass_of(
- $self_meta_meta,
- $common_ancestor,
- )
- && _is_role_only_subclass_of(
- $super_meta_meta,
- $common_ancestor,
- );
- }
-
- return 1;
-}
-
-# This, and some other functions, could be called as methods, but
-# they're not for two reasons. One, we just end up ignoring the first
-# argument, because we can't call these directly on one of the real
-# arguments, because one of them could be a Class::MOP::Class object
-# and not a Moose::Meta::Class. Second, only a completely insane
-# person would attempt to subclass this stuff!
-sub _find_common_ancestor {
- my ($meta1, $meta2) = @_;
-
- # FIXME? This doesn't account for multiple inheritance (not sure
- # if it needs to though). For example, is somewhere in $meta1's
- # history it inherits from both ClassA and ClassB, and $meta2
- # inherits from ClassB & ClassA, does it matter? And what crazy
- # fool would do that anyway?
-
- my %meta1_parents = map { $_ => 1 } $meta1->linearized_isa;
-
- return first { $meta1_parents{$_} } $meta2->linearized_isa;
}
-sub _is_role_only_subclass_of {
- my ($meta, $ancestor) = @_;
-
- return 1 if $meta->name eq $ancestor;
-
- my @roles = _all_roles_until( $meta, $ancestor );
-
- my %role_packages = map { $_->name => 1 } @roles;
-
- my $ancestor_meta = Class::MOP::Class->initialize($ancestor);
-
- my %shared_ancestors = map { $_ => 1 } $ancestor_meta->linearized_isa;
-
- for my $method ( $meta->get_all_methods() ) {
- next if $method->name eq 'meta';
- next if $method->can('associated_attribute');
-
- next
- if $role_packages{ $method->original_package_name }
- || $shared_ancestors{ $method->original_package_name };
-
- return 0;
- }
-
- # FIXME - this really isn't right. Just because an attribute is
- # defined in a role doesn't mean it isn't _also_ defined in the
- # subclass.
- for my $attr ( $meta->get_all_attributes ) {
- next if $shared_ancestors{ $attr->associated_class->name };
-
- next if any { $_->has_attribute( $attr->name ) } @roles;
+sub _fix_class_metaclass_incompatibility {
+ my $self = shift;
+ my ($super_meta) = @_;
+
+ $self->SUPER::_fix_class_metaclass_incompatibility(@_);
+
+ if ($self->_class_metaclass_can_be_made_compatible($super_meta)) {
+ ($self->is_pristine)
+ || confess "Can't fix metaclass incompatibility for "
+ . $self->name
+ . " because it is not pristine.";
+ my $super_meta_name = $super_meta->_real_ref_name;
+ my $class_meta_subclass_meta_name = Moose::Util::_reconcile_roles_for_metaclass(blessed($self), $super_meta_name);
+ my $new_self = $class_meta_subclass_meta_name->reinitialize(
+ $self->name,
+ );
- return 0;
+ $self->_replace_self( $new_self, $class_meta_subclass_meta_name );
}
-
- return 1;
-}
-
-sub _all_roles {
- my $meta = shift;
-
- return _all_roles_until($meta);
}
-sub _all_roles_until {
- my ($meta, $stop_at_class) = @_;
-
- return unless $meta->can('calculate_all_roles');
-
- my @roles = $meta->calculate_all_roles;
-
- for my $class ( $meta->linearized_isa ) {
- last if $stop_at_class && $stop_at_class eq $class;
-
- my $meta = Class::MOP::Class->initialize($class);
- last unless $meta->can('calculate_all_roles');
+sub _fix_single_metaclass_incompatibility {
+ my $self = shift;
+ my ($metaclass_type, $super_meta) = @_;
+
+ $self->SUPER::_fix_single_metaclass_incompatibility(@_);
+
+ if ($self->_single_metaclass_can_be_made_compatible($super_meta, $metaclass_type)) {
+ ($self->is_pristine)
+ || confess "Can't fix metaclass incompatibility for "
+ . $self->name
+ . " because it is not pristine.";
+ my $super_meta_name = $super_meta->_real_ref_name;
+ my $class_specific_meta_subclass_meta_name = Moose::Util::_reconcile_roles_for_metaclass($self->$metaclass_type, $super_meta->$metaclass_type);
+ my $new_self = $super_meta->reinitialize(
+ $self->name,
+ $metaclass_type => $class_specific_meta_subclass_meta_name,
+ );
- push @roles, $meta->calculate_all_roles;
+ $self->_replace_self( $new_self, $super_meta_name );
}
-
- return uniq @roles;
}
-sub _reconcile_role_differences {
- my ($self, $super_meta) = @_;
-
- my $self_meta = Class::MOP::class_of($self);
-
- my %roles;
-
- if ( my @roles = map { $_->name } _all_roles($self_meta) ) {
- $roles{metaclass_roles} = \@roles;
- }
-
- for my $thing (@MetaClassTypes) {
- my $name = $self->$thing();
+sub _replace_self {
+ my $self = shift;
+ my ( $new_self, $new_class) = @_;
- my $thing_meta = Class::MOP::Class->initialize($name);
-
- my @roles = map { $_->name } _all_roles($thing_meta)
- or next;
-
- $roles{ $thing . '_roles' } = \@roles;
- }
-
- $self->_reinitialize_with($super_meta);
-
- Moose::Util::MetaRole::apply_metaclass_roles(
- for_class => $self->name,
- %roles,
- );
+ %$self = %$new_self;
+ bless $self, $new_class;
- return $self;
+ # We need to replace the cached metaclass instance or else when it goes
+ # out of scope Class::MOP::Class destroy's the namespace for the
+ # metaclass's class, causing much havoc.
+ my $weaken = Class::MOP::metaclass_is_weak( $self->name );
+ Class::MOP::store_metaclass_by_name( $self->name, $self );
+ Class::MOP::weaken_metaclass( $self->name ) if $weaken;
}
sub _process_attribute {
}
}
+## Immutability
+
+sub _immutable_options {
+ my ( $self, @args ) = @_;
+
+ $self->SUPER::_immutable_options(
+ inline_destructor => 1,
+
+ # Moose always does this when an attribute is created
+ inline_accessors => 0,
+
+ @args,
+ );
+}
+
## -------------------------------------------------
our $error_level;
$self->raise_error($self->create_error(@args));
}
+sub _inline_throw_error {
+ my ( $self, $msg, $args ) = @_;
+ "\$meta->throw_error($msg" . ($args ? ", $args" : "") . ")"; # FIXME makes deparsing *REALLY* hard
+}
+
sub raise_error {
my ( $self, @args ) = @_;
die @args;
1;
+# ABSTRACT: The Moose metaclass
+
__END__
=pod
-=head1 NAME
-
-Moose::Meta::Class - The Moose metaclass
-
=head1 DESCRIPTION
This class is a subclass of L<Class::MOP::Class> that provides
it uses the Moose-specific constructor and destructor classes, and
enables inlining the destructor.
-Also, since Moose always inlines attributes, it sets the
-C<inline_accessors> option to false.
+Since Moose always inlines attributes, it sets the C<inline_accessors> option
+to false.
=item B<< $metaclass->new_object(%params) >>
This will return a unique array of C<Moose::Meta::Role> instances
which are attached to this class.
+=item B<< $metaclass->calculate_all_roles_with_inheritance >>
+
+This will return a unique array of C<Moose::Meta::Role> instances
+which are attached to this class, and each of this class's ancestors.
+
=item B<< $metaclass->add_role($role) >>
This takes a L<Moose::Meta::Role> object, and adds it to the class's
=item B<< $metaclass->destructor_class($class_name) >>
-These are the names of classes used when making a class
-immutable. These default to L<Moose::Meta::Method::Constructor> and
+These are the names of classes used when making a class immutable. These
+default to L<Moose::Meta::Method::Constructor> and
L<Moose::Meta::Method::Destructor> respectively. These accessors are
read-write, so you can use them to change the class name.
See L<Moose/BUGS> for details on reporting bugs.
-=head1 AUTHOR
-
-Stevan Little E<lt>stevan@iinteractive.comE<gt>
-
-=head1 COPYRIGHT AND LICENSE
-
-Copyright 2006-2010 by Infinity Interactive, Inc.
-
-L<http://www.iinteractive.com>
-
-This library is free software; you can redistribute it and/or modify
-it under the same terms as Perl itself.
-
=cut
projects / gitmo/Moose.git / blobdiff