diff options
| -rw-r--r-- | lisp/emacs-lisp/trace.el | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lisp/emacs-lisp/trace.el b/lisp/emacs-lisp/trace.el index 5c35036a50d..4ebb7ff711d 100644 --- a/lisp/emacs-lisp/trace.el +++ b/lisp/emacs-lisp/trace.el @@ -292,7 +292,9 @@ If `current-prefix-arg' is non-nil, also read a buffer and a \"context\" (defun trace-function-foreground (function &optional buffer context) "Trace calls to function FUNCTION. With a prefix argument, also prompt for the trace buffer (default -`trace-buffer'), and a Lisp expression CONTEXT. +`trace-buffer'), and a Lisp expression CONTEXT. When called from +Lisp, CONTEXT should be a function of no arguments which returns +a value to insert into BUFFER during the trace. Tracing a function causes every call to that function to insert into BUFFER Lisp-style trace messages that display the function's |