diff options
Diffstat (limited to 'lisp/emacs-lisp/eldoc.el')
| -rw-r--r-- | lisp/emacs-lisp/eldoc.el | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/lisp/emacs-lisp/eldoc.el b/lisp/emacs-lisp/eldoc.el index c1bc6dae515..2ff273ebab3 100644 --- a/lisp/emacs-lisp/eldoc.el +++ b/lisp/emacs-lisp/eldoc.el @@ -267,13 +267,13 @@ Emacs Lisp mode) that support Eldoc.") ;; Return a string containing the function parameter list, or 1-line ;; docstring if function is a subr and no arglist is obtainable from the ;; docstring or elsewhere. -(defun eldoc-get-fnsym-args-string (sym argument-index) +(defun eldoc-get-fnsym-args-string (sym &optional argument-index) (let ((args nil) (doc nil)) (cond ((not (and sym (symbolp sym) (fboundp sym)))) ((and (eq sym (aref eldoc-last-data 0)) (eq 'function (aref eldoc-last-data 2))) - (setq args (aref eldoc-last-data 1))) + (setq doc (aref eldoc-last-data 1))) ((setq doc (help-split-fundoc (documentation sym t) sym)) (setq args (car doc)) (string-match "\\`[^ )]* ?" args) @@ -281,8 +281,9 @@ Emacs Lisp mode) that support Eldoc.") (eldoc-last-data-store sym args 'function)) (t (setq args (eldoc-function-argstring sym)))) - (when args - (setq doc (eldoc-highlight-function-argument sym args argument-index))) + (and args + argument-index + (setq doc (eldoc-highlight-function-argument sym args argument-index))) doc)) ;; Highlight argument INDEX in ARGS list for SYM. |