+;;;###autoload
+(defmacro define-advice (symbol args &rest body)
+ "Define an advice and add it to function named SYMBOL.
+See `advice-add' and `add-function' for explanation on the
+arguments. Note if NAME is nil the advice is anonymous;
+otherwise it is named `SYMBOL@NAME'.
+
+\(fn SYMBOL (WHERE LAMBDA-LIST &optional NAME DEPTH) &rest BODY)"
+ (declare (indent 2) (doc-string 3) (debug (sexp sexp body)))
+ (or (listp args) (signal 'wrong-type-argument (list 'listp args)))
+ (or (<= 2 (length args) 4)
+ (signal 'wrong-number-of-arguments (list 2 4 (length args))))
+ (let* ((where (nth 0 args))
+ (lambda-list (nth 1 args))
+ (name (nth 2 args))
+ (depth (nth 3 args))
+ (props (and depth `((depth . ,depth))))
+ (advice (cond ((null name) `(lambda ,lambda-list ,@body))
+ ((or (stringp name) (symbolp name))
+ (intern (format "%s@%s" symbol name)))
+ (t (error "Unrecognized name spec `%S'" name)))))
+ `(prog1 ,@(and (symbolp advice) `((defun ,advice ,lambda-list ,@body)))
+ (advice-add ',symbol ,where #',advice ,@(and props `(',props))))))
+