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cl-reduce doc fix

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* lisp/emacs-lisp/cl-seq.el (cl-reduce): Clarify what happens when
SEQ is the empty list (bug#37400).
This commit is contained in:
Lars Ingebrigtsen 2019-10-07 06:32:36 +02:00
parent cfbd1255c2
commit c11910a8be
1 changed files with 5 additions and 0 deletions
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5
lisp/emacs-lisp/cl-seq.el
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@ -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)))