From 71ba72038a66392f33ac02bd7878ee9d5860beca Mon Sep 17 00:00:00 2001
From: Alex Zolotarev <deathbaba@gmail.com>
Date: Mon, 13 Dec 2010 10:06:47 +0000
Subject: [PATCH] Added SimpleTree::Clear()

---
 map/map_tests/simple_tree_test.cpp | 5 +++++
 map/simple_tree.hpp                | 6 ++++++
 2 files changed, 11 insertions(+)

diff --git a/map/map_tests/simple_tree_test.cpp b/map/map_tests/simple_tree_test.cpp
index 1b37c6c60b..4d254c04f5 100644
--- a/map/map_tests/simple_tree_test.cpp
+++ b/map/map_tests/simple_tree_test.cpp
@@ -47,4 +47,9 @@ UNIT_TEST(SimpleTree)
   Calculator<mytree> c3;
   tree[i].ForEachChildren(c3);
   TEST_GREATER(c3.count, c2.count, ("Europe should contain some regions"));
+
+  tree.Clear();
+  Calculator<mytree> c4;
+  tree.ForEachChildren(c4);
+  TEST_EQUAL(c4.count, 0, ("Tree should be empty"));
 }
diff --git a/map/simple_tree.hpp b/map/simple_tree.hpp
index 20bcb158bb..4afeb4d272 100644
--- a/map/simple_tree.hpp
+++ b/map/simple_tree.hpp
@@ -43,6 +43,12 @@ public:
     return m_siblings.back().Value();
   }
 
+  /// Deletes all children and makes tree empty
+  void Clear()
+  {
+    m_siblings.clear();
+  }
+
   bool operator<(SimpleTree<T> const & other) const
   {
     return Value() < other.Value();