1 files changed, 11 insertions, 0 deletions
diff --git a/cutil.lisp b/cutil.lisp
new file mode 100644
index 0000000..0b569e2
--- /dev/null
+++ b/cutil.lisp
@@ -0,0 +1,11 @@
+(defpackage #:cutil
+  (:use #:common-lisp)
+  (:export
+   #:<abstract-class>))
+(in-package #:cutil)
+
+(defclass <abstract-class> () ())
+(defmethod make-instance ((self <abstract-class>) &key)
+  (error "Cannot instantiate abstract class ~A" (class-name c)))
+
+(provide "cutil")