-
package Moose::Role;
-
use strict;
use warnings;
use Scalar::Util 'blessed';
use Carp 'croak';
-use Data::OptList;
use Sub::Exporter;
-our $VERSION = '0.65';
+our $VERSION = '0.89';
$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
use Moose::Util::TypeConstraints;
sub extends {
- croak "Roles do not currently support 'extends'";
+ croak "Roles do not support 'extends' (you can use 'with' to specialize a role)";
}
sub with {
my $meta = Moose::Meta::Role->initialize(shift);
my $name = shift;
croak 'Usage: has \'name\' => ( key => value, ... )' if @_ == 1;
- my %options = @_;
+ my %options = ( definition_context => Moose::Util::_caller_info(), @_ );
my $attrs = ( ref($name) eq 'ARRAY' ) ? $name : [ ($name) ];
$meta->add_attribute( $_, %options ) for @$attrs;
}
-sub before {
+sub _add_method_modifier {
+ my $type = shift;
my $meta = Moose::Meta::Role->initialize(shift);
my $code = pop @_;
for (@_) {
croak "Roles do not currently support "
. ref($_)
- . " references for before method modifiers"
+ . " references for $type method modifiers"
if ref $_;
- $meta->add_before_method_modifier( $_, $code );
+ my $add_method = "add_${type}_method_modifier";
+ $meta->$add_method( $_, $code );
}
}
-sub after {
- my $meta = Moose::Meta::Role->initialize(shift);
+sub before { _add_method_modifier('before', @_) }
- my $code = pop @_;
- for (@_) {
- croak "Roles do not currently support "
- . ref($_)
- . " references for after method modifiers"
- if ref $_;
- $meta->add_after_method_modifier( $_, $code );
- }
-}
+sub after { _add_method_modifier('after', @_) }
-sub around {
- my $meta = Moose::Meta::Role->initialize(shift);
- my $code = pop @_;
- for (@_) {
- croak "Roles do not currently support "
- . ref($_)
- . " references for around method modifiers"
- if ref $_;
- $meta->add_around_method_modifier( $_, $code );
- }
-}
+sub around { _add_method_modifier('around', @_) }
# see Moose.pm for discussion
sub super {
shift;
my %args = @_;
- my $role = $args{for_class}
- or Moose->throw_error("Cannot call init_meta without specifying a for_class");
+ my $role = $args{for_class};
+
+ unless ($role) {
+ require Moose;
+ Moose->throw_error("Cannot call init_meta without specifying a for_class");
+ }
my $metaclass = $args{metaclass} || "Moose::Meta::Role";
my $meta;
if ($role->can('meta')) {
$meta = $role->meta();
- (blessed($meta) && $meta->isa('Moose::Meta::Role'))
- || Moose->throw_error("You already have a &meta function, but it does not return a Moose::Meta::Role");
+
+ unless ( blessed($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");
+ }
}
else {
$meta = $metaclass->initialize($role);
=head1 DESCRIPTION
-Role support in Moose is pretty solid at this point. However, the best
-documentation is still the the test suite. It is fairly safe to assume Perl 6
-style behavior and then either refer to the test suite, or ask questions on
-#moose if something doesn't quite do what you expect.
-
-We are planning writing some more documentation in the near future, but nothing
-is ready yet, sorry.
+The concept of roles is documented in L<Moose::Manual::Roles>. This document
+serves as API documentation.
=head1 EXPORTED FUNCTIONS
Roles can require that certain methods are implemented by any class which
C<does> the role.
+Note that attribute accessors also count as methods for the purposes
+of satisfying the requirements of a role.
+
=item B<excludes (@role_names)>
Roles can C<exclude> other roles, in effect saying "I can never be combined
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:
+
+ use Moose::Role -traits => 'My::Trait';
+
+This is very similar to the attribute traits feature. When you do
+this, your class's C<meta> object will have the specified traits
+applied to it. See L<Moose/Metaclass and Trait Name Resolution> for more
+details.
+
=head1 CAVEATS
Role support has only a few caveats:
mind when using method modifiers in a role. You should never assume any
ordering.
-=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
-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
-requirements, or we will introduce a C<requires_attr> keyword of some kind
-instead. This decision has not yet been finalized.
-
=back
=head1 BUGS
=head1 COPYRIGHT AND LICENSE
-Copyright 2006-2008 by Infinity Interactive, Inc.
+Copyright 2006-2009 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>
projects / gitmo/Moose.git / blobdiff