diff options
| -rw-r--r-- | src/fns.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/fns.c b/src/fns.c index 8db2a86a725..2276a9971b2 100644 --- a/src/fns.c +++ b/src/fns.c @@ -2494,8 +2494,12 @@ mapcar1 (EMACS_INT leni, Lisp_Object *vals, Lisp_Object fn, Lisp_Object seq) DEFUN ("mapconcat", Fmapconcat, Smapconcat, 3, 3, 0, doc: /* Apply FUNCTION to each element of SEQUENCE, and concat the results as strings. In between each pair of results, stick in SEPARATOR. Thus, " " as -SEPARATOR results in spaces between the values returned by FUNCTION. -SEQUENCE may be a list, a vector, a bool-vector, or a string. */) + SEPARATOR results in spaces between the values returned by FUNCTION. +SEQUENCE may be a list, a vector, a bool-vector, or a string. +SEPARATOR must be a string. +FUNCTION must be a function of one argument, and must return a value + that is a sequence of characters: either a string, or a vector or + list of numbers that are valid character codepoints. */) (Lisp_Object function, Lisp_Object sequence, Lisp_Object separator) { USE_SAFE_ALLOCA; |