When applying roles, don't apply the exact same role object more than once.

[gitmo/Moose.git] / lib / Moose / Meta / Role / Application / ToClass.pm

diff --git a/lib/Moose/Meta/Role/Application/ToClass.pm b/lib/Moose/Meta/Role/Application/ToClass.pm
index 822d1e5..3a5a650 100644 (file)
--- a/lib/Moose/Meta/Role/Application/ToClass.pm
+++ b/lib/Moose/Meta/Role/Application/ToClass.pm
@@ -23,6 +23,10 @@ __PACKAGE__->meta->add_attribute('class' => (
 sub apply {
     my ($self, $role, $class) = @_;
 
+    # We're not checking for role names to support multiple instances of the
+    # same Parameterized role.
+    return if grep { $role == $_ } @{ $class->roles() };
+
     # We need weak_ref in CMOP :(
     weaken($self->{role}  = $role);
     weaken($self->{class} = $class);