1 files changed, 23 insertions, 0 deletions
diff --git a/lib/Moose/Exception/MetaclassIsAClassNotASubclassOfGivenMetaclass.pm b/lib/Moose/Exception/MetaclassIsAClassNotASubclassOfGivenMetaclass.pm
new file mode 100644
index 0000000..bbc90be
--- /dev/null
+++ b/lib/Moose/Exception/MetaclassIsAClassNotASubclassOfGivenMetaclass.pm
@@ -0,0 +1,23 @@
+package Moose::Exception::MetaclassIsAClassNotASubclassOfGivenMetaclass;
+our $VERSION = '2.1405';
+
+use Moose;
+extends 'Moose::Exception';
+with 'Moose::Exception::Role::Class';
+
+use Moose::Util 'find_meta';
+
+has 'metaclass' => (
+    is       => 'ro',
+    isa      => 'Str',
+    required => 1
+);
+
+sub _build_message {
+    my $self = shift;
+    my $class = find_meta( $self->class_name );
+    $self->class_name." already has a metaclass, but it does not inherit ".$self->metaclass.
+        " ($class). You cannot make the same thing a role and a class. Remove either Moose or Moose::Role.";
+}
+
+1;