use Scalar::Util 'blessed';
use Carp 'croak';
+use Class::Load 'is_class_loaded';
use Sub::Exporter;
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);
+
Moose->throw_error("The Metaclass $metaclass must be a subclass of Moose::Meta::Role.")
unless $metaclass->isa('Moose::Meta::Role');
$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