From c38d9110f7eea0a56f4ff54af91da4ae9d3df77d Mon Sep 17 00:00:00 2001
From: unknown <serg@serg.mylan>
Date: Mon, 16 Jun 2003 13:18:57 +0200
Subject: [PATCH] comment added

---
 mysys/tree.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/mysys/tree.c b/mysys/tree.c
index a3b69ebff5e..91d2f9771b5 100644
--- a/mysys/tree.c
+++ b/mysys/tree.c
@@ -46,6 +46,16 @@
   Implemented by monty.
 */
 
+/*
+  NOTE:
+  tree->compare function should be ALWAYS called as
+    (*tree->compare)(custom_arg, ELEMENT_KEY(tree,element), key)
+  and not other way around, as
+    (*tree->compare)(custom_arg, key, ELEMENT_KEY(tree,element))
+
+  ft_boolean_search.c (at least) relies on that.
+*/
+
 #include "mysys_priv.h"
 #include <m_string.h>
 #include <my_tree.h>