Add support for adding method modifiers to a role metaclass

[gitmo/Mouse.git] / lib / Mouse / Role.pm

diff --git a/lib/Mouse/Role.pm b/lib/Mouse/Role.pm
index 8eeadc9..e538247 100644 (file)
--- a/lib/Mouse/Role.pm
+++ b/lib/Mouse/Role.pm
@@ -5,30 +5,63 @@ use warnings;
 
 use Sub::Exporter;
 use Carp 'confess';
+use Scalar::Util;
+
+use Mouse::Meta::Role;
 
 do {
     my $CALLER;
 
     my %exports = (
+        meta => sub {
+            my $meta = Mouse::Meta::Role->initialize($CALLER);
+            return sub { $meta };
+        },
         extends => sub {
             return sub {
                 confess "Role does not currently support 'extends'";
             }
         },
         before => sub {
-            return sub { }
+            my $caller = $CALLER;
+            return sub {
+                my $code = pop;
+                for (@_) {
+                    $caller->meta->add_before_method_modifier($_ => $code);
+                }
+            }
         },
         after => sub {
-            return sub { }
+            my $caller = $CALLER;
+            return sub {
+                my $code = pop;
+                for (@_) {
+                    $caller->meta->add_before_method_modifier($_ => $code);
+                }
+            }
         },
         around => sub {
-            return sub { }
+            my $caller = $CALLER;
+            return sub {
+                my $code = pop;
+                for (@_) {
+                    $caller->meta->add_before_method_modifier($_ => $code);
+                }
+            }
         },
         has => sub {
-            return sub { }
+            my $caller = $CALLER;
+            return sub {
+                my $name = shift;
+                my %opts = @_;
+
+                $caller->meta->add_attribute($name => \%opts);
+            }
         },
         with => sub {
-            return sub { }
+            return sub {
+                confess "Role does not currently support 'with'";
+            }
         },
         requires => sub {
             return sub { }
@@ -36,6 +69,12 @@ do {
         excludes => sub {
             return sub { }
         },
+        blessed => sub {
+            return \&Scalar::Util::blessed;
+        },
+        confess => sub {
+            return \&Carp::confess;
+        },
     );
 
     my $exporter = Sub::Exporter::build_exporter({
@@ -53,8 +92,68 @@ do {
     }
 
     sub unimport {
+        my $caller = caller;
+
+        no strict 'refs';
+        for my $keyword (keys %exports) {
+            next if $keyword eq 'meta'; # we don't delete this one
+            delete ${ $caller . '::' }{$keyword};
+        }
     }
 };
 
 1;
 
+__END__
+
+=head1 NAME
+
+Mouse::Role
+
+=head1 KEYWORDS
+
+=head2 meta -> Mouse::Meta::Role
+
+Returns this role's metaclass instance.
+
+=head2 before (method|methods) => Code
+
+Sets up a "before" method modifier. See L<Moose/before> or
+L<Class::Method::Modifiers/before>.
+
+=head2 after (method|methods) => Code
+
+Sets up an "after" method modifier. See L<Moose/after> or
+L<Class::Method::Modifiers/after>.
+
+=head2 around (method|methods) => Code
+
+Sets up an "around" method modifier. See L<Moose/around> or
+L<Class::Method::Modifiers/around>.
+
+=head2 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
+
+L<Carp/confess> for your convenience.
+
+=head2 blessed value -> ClassName | undef
+
+L<Scalar::Util/blessed> for your convenience.
+
+=head1 MISC
+
+=head2 import
+
+Importing Mouse::Role will give you sugar.
+
+=head2 unimport
+
+Please unimport Mouse (C<no Mouse::Role>) so that if someone calls one of the
+keywords (such as L</has>) it will break loudly instead breaking subtly.
+
+=cut
+