diff options
Diffstat (limited to 'lisp/emacs-lisp')
| -rw-r--r-- | lisp/emacs-lisp/eieio-base.el | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/lisp/emacs-lisp/eieio-base.el b/lisp/emacs-lisp/eieio-base.el index 3aeda92db12..62f4c82026e 100644 --- a/lisp/emacs-lisp/eieio-base.el +++ b/lisp/emacs-lisp/eieio-base.el @@ -64,10 +64,18 @@ SLOT-NAME is the offending slot. FN is the function signaling the error." ;; Throw the regular signal. (cl-call-next-method))) -(cl-defmethod clone ((obj eieio-instance-inheritor) &rest _params) +(cl-defmethod clone ((obj eieio-instance-inheritor) &rest params) "Clone OBJ, initializing `:parent' to OBJ. All slots are unbound, except those initialized with PARAMS." - (let ((nobj (cl-call-next-method))) + ;; call next method without params as we makeunbound slots anyhow + (let ((nobj (if (stringp (car params)) + (cl-call-next-method obj (pop params)) + (cl-call-next-method obj)))) + (dolist (descriptor (eieio-class-slots (class-of nobj))) + (let ((slot (eieio-slot-descriptor-name descriptor))) + (slot-makeunbound nobj slot))) + (when params + (shared-initialize nobj params)) (oset nobj parent-instance obj) nobj)) |