use warnings;
use Data::OptList;
+use Params::Util qw( _STRING );
use Sub::Exporter;
use Scalar::Util 'blessed';
+use List::Util qw(first);
+use List::MoreUtils qw(any all);
use Class::MOP 0.60;
-our $VERSION = '1.02';
+our $VERSION = '1.14';
$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
search_class_by_role
ensure_all_roles
apply_all_roles
+ with_traits
get_all_init_args
get_all_attribute_values
resolve_metatrait_alias
}
}
+sub with_traits {
+ my ($class, @roles) = @_;
+ return $class unless @roles;
+ return Moose::Meta::Class->create_anon_class(
+ superclasses => [$class],
+ roles => \@roles,
+ cache => 1,
+ )->name;
+}
+
# instance deconstruction ...
sub get_all_attribute_values {
_create_alias('Class', $to, $trait, $from);
}
+# XXX - this should be added to Params::Util
+sub _STRINGLIKE ($) {
+ return _STRING( $_[0] )
+ || ( blessed $_[0]
+ && overload::Method( $_[0], q{""} )
+ && length "$_[0]" );
+}
+
+sub _reconcile_roles_for_metaclass {
+ my ($class_meta_name, $super_meta_name) = @_;
+
+ my @role_differences = _role_differences(
+ $class_meta_name, $super_meta_name,
+ );
+
+ # handle the case where we need to fix compatibility between a class and
+ # its parent, but all roles in the class are already also done by the
+ # parent
+ # see t/050/054.t
+ return $super_meta_name
+ unless @role_differences;
+
+ return Moose::Meta::Class->create_anon_class(
+ superclasses => [$super_meta_name],
+ roles => [map { $_->name } @role_differences],
+ cache => 1,
+ )->name;
+}
+
+sub _role_differences {
+ my ($class_meta_name, $super_meta_name) = @_;
+ my @super_role_metas = $super_meta_name->meta->can('calculate_all_roles_with_inheritance')
+ ? $super_meta_name->meta->calculate_all_roles_with_inheritance
+ : $super_meta_name->meta->can('calculate_all_roles')
+ ? $super_meta_name->meta->calculate_all_roles
+ : ();
+ my @role_metas = $class_meta_name->meta->can('calculate_all_roles_with_inheritance')
+ ? $class_meta_name->meta->calculate_all_roles_with_inheritance
+ : $class_meta_name->meta->can('calculate_all_roles')
+ ? $class_meta_name->meta->calculate_all_roles
+ : ();
+ my @differences;
+ for my $role_meta (@role_metas) {
+ push @differences, $role_meta
+ unless any { $_->name eq $role_meta->name } @super_role_metas;
+ }
+ return @differences;
+}
+
+sub _classes_differ_by_roles_only {
+ my ( $self_meta_name, $super_meta_name ) = @_;
+
+ my $common_base_name
+ = _find_common_base( $self_meta_name, $super_meta_name );
+
+ return unless defined $common_base_name;
+
+ my @super_meta_name_ancestor_names
+ = _get_ancestors_until( $super_meta_name, $common_base_name );
+ my @class_meta_name_ancestor_names
+ = _get_ancestors_until( $self_meta_name, $common_base_name );
+
+ return
+ unless all { _is_role_only_subclass($_) }
+ @super_meta_name_ancestor_names,
+ @class_meta_name_ancestor_names;
+
+ return 1;
+}
+
+sub _find_common_base {
+ my ($meta1, $meta2) = map { Class::MOP::class_of($_) } @_;
+ return unless defined $meta1 && defined $meta2;
+
+ # FIXME? This doesn't account for multiple inheritance (not sure
+ # if it needs to though). For example, if 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 { $meta1_parents{$_} } $meta2->linearized_isa;
+}
+
+sub _get_ancestors_until {
+ my ($start_name, $until_name) = @_;
+
+ my @ancestor_names;
+ for my $ancestor_name (Class::MOP::class_of($start_name)->linearized_isa) {
+ last if $ancestor_name eq $until_name;
+ push @ancestor_names, $ancestor_name;
+ }
+ return @ancestor_names;
+}
+
+sub _is_role_only_subclass {
+ my ($meta_name) = @_;
+ my $meta = Class::MOP::Class->initialize($meta_name);
+ my @parent_names = $meta->superclasses;
+
+ # XXX: don't feel like messing with multiple inheritance here... what would
+ # that even do?
+ return unless @parent_names == 1;
+ my ($parent_name) = @parent_names;
+ my $parent_meta = Class::MOP::Class->initialize($parent_name);
+
+ # only get the roles attached to this particular class, don't look at
+ # superclasses
+ my @roles = $meta->can('calculate_all_roles')
+ ? $meta->calculate_all_roles
+ : ();
+
+ # it's obviously not a role-only subclass if it doesn't do any roles
+ return unless @roles;
+
+ # loop over all methods that are a part of the current class
+ # (not inherited)
+ for my $method ( $meta->_get_local_methods ) {
+ # always ignore meta
+ next if $method->isa('Class::MOP::Method::Meta');
+ # we'll deal with attributes below
+ next if $method->can('associated_attribute');
+ # if the method comes from a role we consumed, ignore it
+ next if $meta->can('does_role')
+ && $meta->does_role($method->original_package_name);
+ # FIXME - this really isn't right. Just because a modifier is
+ # defined in a role doesn't mean it isn't _also_ defined in the
+ # subclass.
+ next if $method->isa('Class::MOP::Method::Wrapped')
+ && (
+ (!scalar($method->around_modifiers)
+ || any { $_->has_around_method_modifiers($method->name) } @roles)
+ && (!scalar($method->before_modifiers)
+ || any { $_->has_before_method_modifiers($method->name) } @roles)
+ && (!scalar($method->after_modifiers)
+ || any { $_->has_after_method_modifiers($method->name) } @roles)
+ );
+
+ return 0;
+ }
+
+ # loop over all attributes that are a part of the current class
+ # (not inherited)
+ # 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 (map { $meta->get_attribute($_) } $meta->get_attribute_list) {
+ next if any { $_->has_attribute($attr->name) } @roles;
+
+ return 0;
+ }
+
+ return 1;
+}
+
1;
__END__
This function is similar to L</apply_all_roles>, but only applies roles that
C<$applicant> does not already consume.
+=item B<with_traits($class_name, @role_names)>
+
+This function creates a new class from C<$class_name> with each of
+C<@role_names> applied. It returns the name of the new class.
+
=item B<get_all_attribute_values($meta, $instance)>
Returns a hash reference containing all of the C<$instance>'s
projects / gitmo/Moose.git / blobdiff