use warnings;
use Scalar::Util 'blessed';
-use Carp 'confess';
+use Carp 'confess', 'croak';
use Data::OptList;
use Sub::Exporter;
-our $VERSION = '0.09';
+our $VERSION = '0.56';
+$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
use Moose ();
use Moose::Meta::Role;
use Moose::Util::TypeConstraints;
-{
- my ( $CALLER, %METAS );
+sub extends {
+ croak "Roles do not currently support 'extends'";
+}
+
+sub with {
+ Moose::Util::apply_all_roles( Moose::Meta::Role->initialize(shift), @_ );
+}
+
+sub requires {
+ my $meta = Moose::Meta::Role->initialize(shift);
+ croak "Must specify at least one method" unless @_;
+ $meta->add_required_methods(@_);
+}
+
+sub excludes {
+ my $meta = Moose::Meta::Role->initialize(shift);
+ croak "Must specify at least one role" unless @_;
+ $meta->add_excluded_roles(@_);
+}
- sub _find_meta {
- my $role = $CALLER;
+sub has {
+ my $meta = Moose::Meta::Role->initialize(shift);
+ my $name = shift;
+ croak 'Usage: has \'name\' => ( key => value, ... )' if @_ == 1;
+ my %options = @_;
+ my $attrs = ( ref($name) eq 'ARRAY' ) ? $name : [ ($name) ];
+ $meta->add_attribute( $_, %options ) for @$attrs;
+}
- return $METAS{$role} if exists $METAS{$role};
+sub before {
+ my $meta = Moose::Meta::Role->initialize(shift);
+ my $code = pop @_;
- # make a subtype for each Moose class
- role_type $role unless find_type_constraint($role);
+ for (@_) {
+ croak "Moose::Role do not currently support "
+ . ref($_)
+ . " references for before method modifiers"
+ if ref $_;
+ $meta->add_before_method_modifier( $_, $code );
+ }
+}
- my $meta;
- if ($role->can('meta')) {
- $meta = $role->meta();
- (blessed($meta) && $meta->isa('Moose::Meta::Role'))
- || confess "You already have a &meta function, but it does not return a Moose::Meta::Role";
- }
- else {
- $meta = Moose::Meta::Role->initialize($role);
- $meta->alias_method('meta' => sub { $meta });
- }
+sub after {
+ my $meta = Moose::Meta::Role->initialize(shift);
- return $METAS{$role} = $meta;
+ my $code = pop @_;
+ for (@_) {
+ croak "Moose::Role do not currently support "
+ . ref($_)
+ . " references for after method modifiers"
+ if ref $_;
+ $meta->add_after_method_modifier( $_, $code );
}
+}
+
+sub around {
+ my $meta = Moose::Meta::Role->initialize(shift);
+ my $code = pop @_;
+ for (@_) {
+ croak "Moose::Role do not currently support "
+ . ref($_)
+ . " references for around method modifiers"
+ if ref $_;
+ $meta->add_around_method_modifier( $_, $code );
+ }
+}
+# see Moose.pm for discussion
+sub super {
+ return unless $Moose::SUPER_BODY;
+ $Moose::SUPER_BODY->(@Moose::SUPER_ARGS);
+}
+
+sub override {
+ my $meta = Moose::Meta::Role->initialize(shift);
+ my ( $name, $code ) = @_;
+ $meta->add_override_method_modifier( $name, $code );
+}
+
+sub inner {
+ croak "Moose::Role cannot support 'inner'";
+}
+
+sub augment {
+ croak "Moose::Role cannot support 'augment'";
+}
- my %exports = (
- extends => sub {
- my $meta = _find_meta();
- return Class::MOP::subname('Moose::Role::extends' => sub {
- confess "Moose::Role does not currently support 'extends'"
- });
- },
- with => sub {
- my $meta = _find_meta();
- return Class::MOP::subname('Moose::Role::with' => sub (@) {
- Moose::Util::apply_all_roles($meta, @_)
- });
- },
- requires => sub {
- my $meta = _find_meta();
- return Class::MOP::subname('Moose::Role::requires' => sub (@) {
- confess "Must specify at least one method" unless @_;
- $meta->add_required_methods(@_);
- });
- },
- excludes => sub {
- my $meta = _find_meta();
- return Class::MOP::subname('Moose::Role::excludes' => sub (@) {
- confess "Must specify at least one role" unless @_;
- $meta->add_excluded_roles(@_);
- });
- },
- has => sub {
- my $meta = _find_meta();
- return Class::MOP::subname('Moose::Role::has' => sub ($;%) {
- my ($name, %options) = @_;
- $meta->add_attribute($name, %options)
- });
- },
- before => sub {
- my $meta = _find_meta();
- return Class::MOP::subname('Moose::Role::before' => sub (@&) {
- my $code = pop @_;
- $meta->add_before_method_modifier($_, $code) for @_;
- });
- },
- after => sub {
- my $meta = _find_meta();
- return Class::MOP::subname('Moose::Role::after' => sub (@&) {
- my $code = pop @_;
- $meta->add_after_method_modifier($_, $code) for @_;
- });
- },
- around => sub {
- my $meta = _find_meta();
- return Class::MOP::subname('Moose::Role::around' => sub (@&) {
- my $code = pop @_;
- $meta->add_around_method_modifier($_, $code) for @_;
- });
- },
- # see Moose.pm for discussion
- super => sub {
- return Class::MOP::subname('Moose::Role::super' => sub { return unless $Moose::SUPER_BODY; $Moose::SUPER_BODY->(@Moose::SUPER_ARGS) })
- },
- #next => sub {
- # return subname 'Moose::Role::next' => sub { @_ = @Moose::SUPER_ARGS; goto \&next::method };
- #},
- override => sub {
- my $meta = _find_meta();
- return Class::MOP::subname('Moose::Role::override' => sub ($&) {
- my ($name, $code) = @_;
- $meta->add_override_method_modifier($name, $code);
- });
- },
- inner => sub {
- my $meta = _find_meta();
- return Class::MOP::subname('Moose::Role::inner' => sub {
- confess "Moose::Role cannot support 'inner'";
- });
- },
- augment => sub {
- my $meta = _find_meta();
- return Class::MOP::subname('Moose::Role::augment' => sub {
- confess "Moose::Role cannot support 'augment'";
- });
- },
- confess => sub {
- return \&Carp::confess;
- },
- blessed => sub {
- return \&Scalar::Util::blessed;
- }
- );
-
- my $exporter = Sub::Exporter::build_exporter({
- exports => \%exports,
- groups => {
- default => [':all']
- }
- });
-
- sub import {
- $CALLER =
- ref $_[1] && defined $_[1]->{into} ? $_[1]->{into}
- : ref $_[1]
- && defined $_[1]->{into_level} ? caller( $_[1]->{into_level} )
- : caller();
-
- # this works because both pragmas set $^H (see perldoc perlvar)
- # which affects the current compilation - i.e. the file who use'd
- # us - which is why we don't need to do anything special to make
- # it affect that file rather than this one (which is already compiled)
-
- strict->import;
- warnings->import;
-
- # we should never export to main
- return if $CALLER eq 'main';
-
- goto $exporter;
- };
+my $exporter = Moose::Exporter->setup_import_methods(
+ with_caller => [
+ qw( with requires excludes has before after around override make_immutable )
+ ],
+ as_is => [
+ qw( extends super inner augment ),
+ \&Carp::confess,
+ \&Scalar::Util::blessed,
+ ],
+);
+
+sub init_meta {
+ shift;
+ my %args = @_;
+
+ my $role = $args{for_class}
+ or confess
+ "Cannot call init_meta without specifying a for_class";
+
+ my $metaclass = $args{metaclass} || "Moose::Meta::Role";
+
+ # make a subtype for each Moose class
+ role_type $role unless find_type_constraint($role);
+
+ # FIXME copy from Moose.pm
+ my $meta;
+ if ($role->can('meta')) {
+ $meta = $role->meta();
+ (blessed($meta) && $meta->isa('Moose::Meta::Role'))
+ || confess "You already have a &meta function, but it does not return a Moose::Meta::Role";
+ }
+ else {
+ $meta = $metaclass->initialize($role);
+
+ $meta->add_method(
+ 'meta' => sub {
+ # re-initialize so it inherits properly
+ $metaclass->initialize( ref($_[0]) || $_[0] );
+ }
+ );
+ }
+ return $meta;
}
1;
=back
+=head2 B<unimport>
+
+Moose::Role offers a way to remove the keywords it exports, through the
+C<unimport> method. You simply have to say C<no Moose::Role> at the bottom of
+your code for this to work.
+
+=head2 B<< Moose::Role->init_meta(for_class => $role, metaclass => $metaclass) >>
+
+The C<init_meta> method sets up the metaclass object for the role
+specified by C<for_class>. It also injects a a C<meta> accessor into
+the role so you can get at this object.
+
+The default metaclass is L<Moose::Meta::Role>. You can specify an
+alternate metaclass with the C<metaclass> parameter.
+
=head1 CAVEATS
Role support has only a few caveats: