Added stub for visitors

aturon · aturon · commit 0f66d0d9835a · 2014-07-07T20:09:43.000-07:00
diff --git a/SUMMARY.md b/SUMMARY.md
@@ -50,6 +50,7 @@
     * [Timing unclear](changing/unclear.md)
 * [Todo]()
     * [Containers and iteration]()
+    * [The visitor pattern]()
     * [Concurrency]()
     * [Documentation]()
     * [Macros]()
