-#!/usr/bin/env perl
package Mouse::Role;
use strict;
use warnings;
-use base 'Exporter';
+
+use Exporter;
use Carp 'confess';
-use Mouse::Util 'blessed';
+use Scalar::Util 'blessed';
+
+use Mouse::Util qw(load_class get_code_package not_supported);
+use Mouse ();
+
+our @ISA = qw(Exporter);
+
+our @EXPORT = qw(
+ extends with
+ has
+ before after around
+ override super
+ augment inner
+
+ requires excludes
-use Mouse::Meta::Role;
+ blessed confess
+);
-our @EXPORT = qw(before after around has extends with requires excludes confess blessed);
+our %is_removable = map{ $_ => undef } @EXPORT;
+delete $is_removable{confess};
+delete $is_removable{blessed};
sub before {
- my $meta = Mouse::Meta::Role->initialize(caller);
+ my $meta = Mouse::Meta::Role->initialize(scalar caller);
my $code = pop;
for (@_) {
}
sub after {
- my $meta = Mouse::Meta::Role->initialize(caller);
+ my $meta = Mouse::Meta::Role->initialize(scalar caller);
my $code = pop;
for (@_) {
}
sub around {
- my $meta = Mouse::Meta::Role->initialize(caller);
+ my $meta = Mouse::Meta::Role->initialize(scalar caller);
my $code = pop;
for (@_) {
}
}
-sub has {
- my $meta = Mouse::Meta::Role->initialize(caller);
+sub super {
+ return unless $Mouse::SUPER_BODY;
+ $Mouse::SUPER_BODY->(@Mouse::SUPER_ARGS);
+}
+
+sub override {
+ my $classname = caller;
+ my $meta = Mouse::Meta::Role->initialize($classname);
+
+ my $name = shift;
+ my $code = shift;
+ my $fullname = "${classname}::${name}";
+
+ defined &$fullname
+ && $meta->throw_error("Cannot add an override of method '$fullname' "
+ . "because there is a local version of '$fullname'");
+
+ $meta->add_override_method_modifier($name => sub {
+ local $Mouse::SUPER_PACKAGE = shift;
+ local $Mouse::SUPER_BODY = shift;
+ local @Mouse::SUPER_ARGS = @_;
+
+ $code->(@_);
+ });
+}
+
+# We keep the same errors messages as Moose::Role emits, here.
+sub inner {
+ Carp::croak "Roles cannot support 'inner'";
+}
+
+sub augment {
+ Carp::croak "Roles cannot support 'augment'";
+}
+
+sub has {
+ my $meta = Mouse::Meta::Role->initialize(scalar caller);
my $name = shift;
- my %opts = @_;
- $meta->add_attribute($name => \%opts);
+ $meta->add_attribute($_ => @_) for ref($name) ? @{$name} : $name;
}
-sub extends { confess "Roles do not support 'extends'" }
+sub extends {
+ Carp::croak "Roles do not support 'extends'"
+}
-sub with { confess "Mouse::Role does not currently support 'with'" }
+sub with {
+ my $meta = Mouse::Meta::Role->initialize(scalar caller);
+ Mouse::Util::apply_all_roles($meta->name, @_);
+}
sub requires {
- my $meta = Mouse::Meta::Role->initialize(caller);
- Carp::croak "Must specify at least one method" unless @_;
+ my $meta = Mouse::Meta::Role->initialize(scalar caller);
+ $meta->throw_error("Must specify at least one method") unless @_;
$meta->add_required_methods(@_);
}
-sub excludes { confess "Mouse::Role does not currently support 'excludes'" }
+sub excludes {
+ not_supported;
+}
sub import {
+ my $class = shift;
+
strict->import;
warnings->import;
my $caller = caller;
- my $meta = Mouse::Meta::Role->initialize(caller);
- no strict 'refs';
- no warnings 'redefine';
- *{$caller.'::meta'} = sub { $meta };
+ # we should never export to main
+ if ($caller eq 'main') {
+ warn qq{$class does not export its sugar to the 'main' package.\n};
+ return;
+ }
+
+ Mouse::Meta::Role->initialize($caller)->add_method(meta => sub {
+ return Mouse::Meta::Role->initialize(ref($_[0]) || $_[0]);
+ });
Mouse::Role->export_to_level(1, @_);
}
sub unimport {
my $caller = caller;
- no strict 'refs';
+ my $stash = do{
+ no strict 'refs';
+ \%{$caller . '::'}
+ };
+
for my $keyword (@EXPORT) {
- delete ${ $caller . '::' }{$keyword};
+ my $code;
+ if(exists $is_removable{$keyword}
+ && ($code = $caller->can($keyword))
+ && get_code_package($code) eq __PACKAGE__){
+
+ delete $stash->{$keyword};
+ }
}
+ return;
}
1;
=head1 NAME
-Mouse::Role
+Mouse::Role - The Mouse Role
+
+=head1 SYNOPSIS
+
+ package MyRole;
+ use Mouse::Role;
=head1 KEYWORDS
-=head2 meta -> Mouse::Meta::Role
+=head2 C<< meta -> Mouse::Meta::Role >>
Returns this role's metaclass instance.
-=head2 before (method|methods) => Code
+=head2 C<< before (method|methods) -> CodeRef >>
-Sets up a "before" method modifier. See L<Moose/before> or
+Sets up a B<before> method modifier. See L<Moose/before> or
L<Class::Method::Modifiers/before>.
-=head2 after (method|methods) => Code
+=head2 C<< after (method|methods) => CodeRef >>
-Sets up an "after" method modifier. See L<Moose/after> or
+Sets up an B<after> method modifier. See L<Moose/after> or
L<Class::Method::Modifiers/after>.
-=head2 around (method|methods) => Code
+=head2 C<< around (method|methods) => CodeRef >>
-Sets up an "around" method modifier. See L<Moose/around> or
+Sets up an B<around> method modifier. See L<Moose/around> or
L<Class::Method::Modifiers/around>.
-=head2 has (name|names) => parameters
+=head2 C<super>
+
+Sets up the B<super> keyword. See L<Moose/super>.
+
+=head2 C<< override method => CodeRef >>
+
+Sets up an B<override> method modifier. See L<Moose/Role/override>.
+
+=head2 C<inner>
+
+This is not supported in roles and emits an error. See L<Moose/Role>.
+
+=head2 C<< augment method => CodeRef >>
+
+This is not supported in roles and emits an error. See L<Moose/Role>.
+
+=head2 C<< has (name|names) => parameters >>
Sets up an attribute (or if passed an arrayref of names, multiple attributes) to
this role. See L<Mouse/has>.
-=head2 confess error -> BOOM
+=head2 C<< confess(error) -> BOOM >>
L<Carp/confess> for your convenience.
-=head2 blessed value -> ClassName | undef
+=head2 C<< blessed(value) -> ClassName | undef >>
L<Scalar::Util/blessed> for your convenience.
=head2 unimport
-Please unimport Mouse (C<no Mouse::Role>) so that if someone calls one of the
+Please unimport (C<< no Mouse::Role >>) so that if someone calls one of the
keywords (such as L</has>) it will break loudly instead breaking subtly.
+=head1 SEE ALSO
+
+L<Moose::Role>
+
=cut
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