Comment change.

diff --git a/lisp/progmodes/c-mode.el b/lisp/progmodes/c-mode.el
index 1bc95a7724335abcb2c5738b1476da243d3bacc7..bbb195a2b91617af0c3a0289ff004ea1f412f5d0 100644 (file)
--- a/lisp/progmodes/c-mode.el
+++ b/lisp/progmodes/c-mode.el
@@ -1137,6 +1137,13 @@ If within a string or comment, move by sentences instead of statements."
            (if (= (following-char) ?})
                (setq this-indent (- this-indent c-indent-level)))
            (if (= (following-char) ?{)
+               ;; Don't move an open-brace in column 0.
+               ;; This is good when constructs such as
+               ;; `extern "C" {' surround a function definition
+               ;; that should be indented as usual.
+               ;; It is also good for nested functions.
+               ;; It is bad when an open-brace is indented at column 0
+               ;; and you want to fix that, but we can't win 'em all.
                (if (zerop (current-column))
                    (setq this-indent 0)
                  (setq this-indent (+ this-indent c-brace-offset))))