# HG changeset patch
# User Thinker K.F. Li <thinker@codemud.net>
# Date 1284091667 -28800
# Node ID 2bf2462071402daea2651d7ea69f2ce93dbec35f
# Parent  3808a6ffc88195211c58e88fdd5297c54504f60f
Doc for visit argument of _walk_code_tree()

diff -r 3808a6ffc881 -r 2bf246207140 src/cospy.c
--- a/src/cospy.c	Fri Sep 10 12:04:40 2010 +0800
+++ b/src/cospy.c	Fri Sep 10 12:07:47 2010 +0800
@@ -124,6 +124,10 @@
  * expression and data as arguments.  The cb is called only for the
  * node with tree code value given by accept_code.
  *
+ * This fuction is also used to clean visited flag of nodes in a tree.
+ * Parameter visit is true for doing normal traveling.  Visit is false
+ * for doing cleaning.
+ *
  * \param accept_code is tree code of nodes that calling cb for or -1
  *		to call cb for every node.
  * \param visit is true for traveling and false for cleaning.