From: Karl Heuer <kwzh@gnu.org>
Date: Tue, 11 Apr 1995 00:38:11 +0000 (+0000)
Subject: Comment changes.
X-Git-Tag: emacs-19.34~4491
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=167018113cf0f690cca41e9e4c2f4a1121356352;p=emacs.git

Comment changes.
---

diff --git a/src/keyboard.h b/src/keyboard.h
index e3c30fd0f54..93d4d7bd0f3 100644
--- a/src/keyboard.h
+++ b/src/keyboard.h
@@ -66,7 +66,17 @@ struct kboard
   {
     KBOARD *next_kboard;
 
-    /* The state of a prefix arg.  */
+    /* The state of a prefix arg.
+       After pressing C-u COUNT times, prefix_factor is 4^COUNT
+       and prefix_value is nil.
+       After C-u NUM, prefix_factor is nil and prefix_value is abs(NUM).
+       (prefix_factor and prefix_value are never both non-nil.)
+       prefix_sign is always either +1 or -1; a value of -1 means that
+       the actual numeric argument is the negative of what's in prefix_value,
+       or just `-' if prefix_value is nil.
+       The boolean prefix_partial means that the user is in the process
+       of building a prefix argument, so that a minus or digit key at
+       this point is handled specially.  */
     Lisp_Object prefix_factor, prefix_value;
     int prefix_sign, prefix_partial;