diff options
Diffstat (limited to 'lisp/emacs-lisp')
| -rw-r--r-- | lisp/emacs-lisp/cl-seq.el | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lisp/emacs-lisp/cl-seq.el b/lisp/emacs-lisp/cl-seq.el index a15c994bc1a..520d450481f 100644 --- a/lisp/emacs-lisp/cl-seq.el +++ b/lisp/emacs-lisp/cl-seq.el @@ -133,6 +133,11 @@ If :INITIAL-VALUE is specified, it is added to the front of SEQ. If SEQ is empty, return :INITIAL-VALUE and FUNCTION is not called. +If SEQ is empty and no :INITIAL-VALUE is given, then the function +is called with zero arguments, and reduce returns whatever +function does. This is the only case where the function is called +with other than two arguments. + \n(fn FUNCTION SEQ [KEYWORD VALUE]...)" (cl--parsing-keywords (:from-end (:start 0) :end :initial-value :key) () (or (listp cl-seq) (setq cl-seq (append cl-seq nil))) |