my $role = $CALLER;
return $METAS{$role} if exists $METAS{$role};
-
+
# make a subtype for each Moose class
subtype $role
=> as 'Role'
=> where { $_->does($role) }
- => optimize_as { blessed($_[0]) && $_[0]->can('does') && $_[0]->does($role) }
- unless find_type_constraint($role);
+ => optimize_as { blessed($_[0]) && $_[0]->can('does') && $_[0]->does($role) }
+ unless find_type_constraint($role);
- my $meta;
- if ($role->can('meta')) {
- $meta = $role->meta();
- (blessed($meta) && $meta->isa('Moose::Meta::Role'))
+ 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->Moose::Meta::Class::add_method('meta' => sub { $meta })
- }
+ }
+ else {
+ $meta = Moose::Meta::Role->initialize($role);
+ $meta->alias_method('meta' => sub { $meta });
+ }
return $METAS{$role} = $meta;
}
-
-
- my %exports = (
+
+
+ my %exports = (
extends => sub {
my $meta = _find_meta();
- return subname 'Moose::Role::extends' => sub {
+ return subname 'Moose::Role::extends' => sub {
confess "Moose::Role does not currently support 'extends'"
- };
- },
- with => sub {
- my $meta = _find_meta();
- return subname 'Moose::Role::with' => sub (@) {
+ };
+ },
+ with => sub {
+ my $meta = _find_meta();
+ return subname 'Moose::Role::with' => sub (@) {
my (@roles) = @_;
confess "Must specify at least one role" unless @roles;
Class::MOP::load_class($_) for @roles;
)->apply($meta);
}
};
- },
+ },
requires => sub {
my $meta = _find_meta();
- return subname 'Moose::Role::requires' => sub (@) {
+ return subname 'Moose::Role::requires' => sub (@) {
confess "Must specify at least one method" unless @_;
$meta->add_required_methods(@_);
- };
- },
+ };
+ },
excludes => sub {
my $meta = _find_meta();
- return subname 'Moose::Role::excludes' => sub (@) {
+ return subname 'Moose::Role::excludes' => sub (@) {
confess "Must specify at least one role" unless @_;
$meta->add_excluded_roles(@_);
- };
- },
+ };
+ },
has => sub {
my $meta = _find_meta();
- return subname 'Moose::Role::has' => sub ($;%) {
- my ($name, %options) = @_;
- $meta->add_attribute($name, %options)
- };
- },
+ return subname 'Moose::Role::has' => sub ($;%) {
+ my ($name, %options) = @_;
+ $meta->add_attribute($name, %options)
+ };
+ },
before => sub {
my $meta = _find_meta();
- return subname 'Moose::Role::before' => sub (@&) {
+ return subname 'Moose::Role::before' => sub (@&) {
my $code = pop @_;
$meta->add_before_method_modifier($_, $code) for @_;
- };
- },
+ };
+ },
after => sub {
my $meta = _find_meta();
- return subname 'Moose::Role::after' => sub (@&) {
- my $code = pop @_;
- $meta->add_after_method_modifier($_, $code) for @_;
- };
- },
+ return subname 'Moose::Role::after' => sub (@&) {
+ my $code = pop @_;
+ $meta->add_after_method_modifier($_, $code) for @_;
+ };
+ },
around => sub {
my $meta = _find_meta();
- return subname 'Moose::Role::around' => sub (@&) {
- my $code = pop @_;
- $meta->add_around_method_modifier($_, $code) for @_;
- };
- },
- super => sub {
+ return subname 'Moose::Role::around' => sub (@&) {
+ my $code = pop @_;
+ $meta->add_around_method_modifier($_, $code) for @_;
+ };
+ },
+ super => sub {
{
no strict 'refs';
$Moose::SUPER_SLOT{$CALLER} = \*{"${CALLER}::super"};
return subname 'Moose::Role::override' => sub ($&) {
my ($name, $code) = @_;
$meta->add_override_method_modifier($name, $code);
- };
- },
+ };
+ },
inner => sub {
my $meta = _find_meta();
return subname 'Moose::Role::inner' => sub {
confess "Moose::Role cannot support 'inner'";
- };
- },
+ };
+ },
augment => sub {
my $meta = _find_meta();
return 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({
+ my $exporter = Sub::Exporter::build_exporter({
exports => \%exports,
groups => {
default => [':all']
}
});
-
+
sub import {
$CALLER =
ref $_[1] && defined $_[1]->{into} ? $_[1]->{into}
&& defined $_[1]->{into_level} ? caller( $_[1]->{into_level} )
: caller();
-
+
strict->import;
- warnings->import;
+ warnings->import;
# we should never export to main
return if $CALLER eq 'main';
package Eq;
use Moose::Role; # automatically turns on strict and warnings
-
+
requires 'equal';
-
- sub no_equal {
+
+ sub no_equal {
my ($self, $other) = @_;
!$self->equal($other);
}
-
+
# ... then in your classes
-
+
package Currency;
use Moose; # automatically turns on strict and warnings
-
+
with 'Eq';
-
+
sub equal {
my ($self, $other) = @_;
$self->as_float == $other->as_float;
=item B<requires (@method_names)>
-Roles can require that certain methods are implemented by any class which
+Roles can require that certain methods are implemented by any class which
C<does> the role.
=item B<excludes (@role_names)>
Roles can C<exclude> other roles, in effect saying "I can never be combined
-with these C<@role_names>". This is a feature which should not be used
+with these C<@role_names>". This is a feature which should not be used
lightly.
=back
=item *
-Roles cannot use the C<extends> keyword; it will throw an exception for now.
-The same is true of the C<augment> and C<inner> keywords (not sure those
-really make sense for roles). All other Moose keywords will be I<deferred>
+Roles cannot use the C<extends> keyword; it will throw an exception for now.
+The same is true of the C<augment> and C<inner> keywords (not sure those
+really make sense for roles). All other Moose keywords will be I<deferred>
so that they can be applied to the consuming class.
-=item *
+=item *
Role composition does its best to B<not> be order-sensitive when it comes to
conflict resolution and requirements detection. However, it is order-sensitive
=item *
-The C<requires> keyword currently only works with actual methods. A method
-modifier (before/around/after and override) will not count as a fufillment
+The C<requires> keyword currently only works with actual methods. A method
+modifier (before/around/after and override) will not count as a fufillment
of the requirement, and neither will an autogenerated accessor for an attribute.
It is likely that attribute accessors will eventually be allowed to fufill those
=head1 BUGS
-All complex software has bugs lurking in it, and this module is no
+All complex software has bugs lurking in it, and this module is no
exception. If you find a bug please either email me, or add the bug
to cpan-RT.
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.
+it under the same terms as Perl itself.
=cut
projects / gitmo/Moose.git / blobdiff