1 files changed, 26 insertions, 0 deletions
diff --git a/lib/Moose/Exception/IncompatibleMetaclassOfSuperclass.pm b/lib/Moose/Exception/IncompatibleMetaclassOfSuperclass.pm
new file mode 100644
index 0000000..98c8fb2
--- /dev/null
+++ b/lib/Moose/Exception/IncompatibleMetaclassOfSuperclass.pm
@@ -0,0 +1,26 @@
+package Moose::Exception::IncompatibleMetaclassOfSuperclass;
+our $VERSION = '2.1405';
+
+use Moose;
+extends 'Moose::Exception';
+with 'Moose::Exception::Role::Class';
+
+has [qw/superclass_name superclass_meta_type class_meta_type/] => (
+    is       => 'ro',
+    isa      => 'Str',
+    required => 1,
+);
+
+sub _build_message {
+    my $self            = shift;
+    my $class_name      = $self->class_name;
+    my $class_meta_type = $self->class_meta_type;
+    my $superclass_name = $self->superclass_name;
+    my $supermeta_type  = $self->superclass_meta_type;
+
+    return "The metaclass of $class_name ($class_meta_type)" .
+           " is not compatible with the metaclass of its superclass, " .
+           "$superclass_name ($supermeta_type)";
+}
+
+1;