Unordered: Initial stab at siphash example.

[SVN r81973]

examples/siphash/siphash_example.cpp

@@ -0,0 +1,38 @@
+
+// Copyright 2012 Daniel James.
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+// This is also released into the public domain.
+
+#include <boost/unordered_set.hpp>
+#include <cassert>
+#include "siphash.hpp"
+
+int main()
+{
+    boost::unordered_set<int, hash::siphash<int> > x1(0, hash::generate_sipkey());
+    boost::unordered_set<int, hash::siphash<int> > x2(0, hash::generate_sipkey());
+
+    assert(x1 == x2);
+
+    x1.insert(10);
+    x1.insert(30);
+    x1.insert(50);
+    assert(x1 != x2);
+
+    x2.insert(100);
+    assert(x1 != x2);
+
+    x1.insert(x2.begin(), x2.end());
+    x2.insert(x1.begin(), x1.end());
+    assert(x1 == x2);
+
+    assert(x1.bucket(10) != x2.bucket(10));
+    assert(x1.bucket(30) != x2.bucket(30));
+
+    x1 = x2;
+
+    assert(x1.bucket(10) == x2.bucket(10));
+    assert(x1.bucket(30) == x2.bucket(30));
+}