use Scalar::Util 'blessed';
use Carp 'croak';
+use Class::Load 'is_class_loaded';
use Sub::Exporter;
-our $VERSION = '1.07';
-$VERSION = eval $VERSION;
-our $AUTHORITY = 'cpan:STEVAN';
-
use Moose ();
use Moose::Util ();
my $meta = shift;
my $name = shift;
croak 'Usage: has \'name\' => ( key => value, ... )' if @_ == 1;
- my %options = ( definition_context => Moose::Util::_caller_info(), @_ );
+ my %context = Moose::Util::_caller_info;
+ $context{context} = 'has declaration';
+ $context{type} = 'role';
+ my %options = ( definition_context => \%context, @_ );
my $attrs = ( ref($name) eq 'ARRAY' ) ? $name : [ ($name) ];
$meta->add_attribute( $_, %options ) for @$attrs;
}
sub _add_method_modifier {
my $type = shift;
my $meta = shift;
- my $code = pop @_;
-
- for (@_) {
- croak "Roles do not currently support "
- . ref($_)
- . " references for $type method modifiers"
- if ref $_;
- my $add_method = "add_${type}_method_modifier";
- $meta->$add_method( $_, $code );
+
+ if ( ref($_[0]) eq 'Regexp' ) {
+ croak "Roles do not currently support regex "
+ . " references for $type method modifiers";
}
+
+ Moose::Util::add_method_modifier($meta, $type, \@_);
}
sub before { _add_method_modifier('before', @_) }
}
my $metaclass = $args{metaclass} || "Moose::Meta::Role";
+ my $meta_name = exists $args{meta_name} ? $args{meta_name} : 'meta';
+
+ Moose->throw_error("The Metaclass $metaclass must be loaded. (Perhaps you forgot to 'use $metaclass'?)")
+ unless is_class_loaded($metaclass);
- # make a subtype for each Moose class
+ Moose->throw_error("The Metaclass $metaclass must be a subclass of Moose::Meta::Role.")
+ unless $metaclass->isa('Moose::Meta::Role');
+
+ # make a subtype for each Moose role
role_type $role unless find_type_constraint($role);
- # FIXME copy from Moose.pm
my $meta;
- if ($role->can('meta')) {
- $meta = $role->meta();
-
- unless ( blessed($meta) && $meta->isa('Moose::Meta::Role') ) {
- require Moose;
- Moose->throw_error("You already have a &meta function, but it does not return a Moose::Meta::Role");
+ if ( $meta = Class::MOP::get_metaclass_by_name($role) ) {
+ unless ( $meta->isa("Moose::Meta::Role") ) {
+ my $error_message = "$role already has a metaclass, but it does not inherit $metaclass ($meta).";
+ if ( $meta->isa('Moose::Meta::Class') ) {
+ Moose->throw_error($error_message . ' You cannot make the same thing a role and a class. Remove either Moose or Moose::Role.');
+ } else {
+ Moose->throw_error($error_message);
+ }
}
}
else {
$meta = $metaclass->initialize($role);
+ }
- $meta->add_method(
- 'meta' => sub {
- # re-initialize so it inherits properly
- $metaclass->initialize( ref($_[0]) || $_[0] );
- }
- );
+ if (defined $meta_name) {
+ # also check for inherited non moose 'meta' method?
+ my $existing = $meta->get_method($meta_name);
+ if ($existing && !$existing->isa('Class::MOP::Method::Meta')) {
+ Carp::cluck "Moose::Role is overwriting an existing method named "
+ . "$meta_name in role $role with a method "
+ . "which returns the class's metaclass. If this is "
+ . "actually what you want, you should remove the "
+ . "existing method, otherwise, you should rename or "
+ . "disable this generated method using the "
+ . "'-meta_name' option to 'use Moose::Role'.";
+ }
+ $meta->_add_meta_method($meta_name);
}
return $meta;
1;
+# ABSTRACT: The Moose Role
+
__END__
=pod
-=head1 NAME
-
-Moose::Role - The Moose Role
-
=head1 SYNOPSIS
package Eq;
$self->as_float == $other->as_float;
}
+ # ... and also
+
+ package Comparator;
+ use Moose;
+
+ has compare_to => (
+ is => 'ro',
+ does => 'Eq',
+ handles => 'Eq',
+ );
+
+ # ... which allows
+
+ my $currency1 = Currency->new(...);
+ my $currency2 = Currency->new(...);
+ Comparator->new(compare_to => $currency1)->equal($currency2);
+
=head1 DESCRIPTION
The concept of roles is documented in L<Moose::Manual::Roles>. This document
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 METACLASS
-When you use Moose::Role, you can specify which metaclass to use:
-
- use Moose::Role -metaclass => 'My::Meta::Role';
-
-You can also specify traits which will be applied to your role metaclass:
+When you use Moose::Role, you can specify traits which will be applied to your
+role metaclass:
use Moose::Role -traits => 'My::Trait';
Doing this creates a new, mutable, anonymous subclass, applies the role to that,
and reblesses. In a debugger, for example, you will see class names of the
-form C< Class::MOP::Class::__ANON__::SERIAL::6 >, which means that doing a 'ref'
-on your instance may not return what you expect. See L<Moose::Object> for 'DOES'.
+form C< Moose::Meta::Class::__ANON__::SERIAL::6 >, which means that doing a
+'ref' on your instance may not return what you expect. See L<Moose::Object> for
+'DOES'.
-Additional params may be added to the new instance by providing 'rebless_params'.
-See L<Moose::Meta::Role::Application::ToInstance>.
+Additional params may be added to the new instance by providing
+'rebless_params'. See L<Moose::Meta::Role::Application::ToInstance>.
=head1 CAVEATS
See L<Moose/BUGS> for details on reporting bugs.
-=head1 AUTHOR
-
-Stevan Little E<lt>stevan@iinteractive.comE<gt>
-
-Christian Hansen E<lt>chansen@cpan.orgE<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