Added contains() and function_equal()

[SVN r22483]

include/boost/function_equal.hpp

@@ -0,0 +1,24 @@
+//  Copyright Doug Gregor 2004. Use, modification and
+//  distribution is subject to 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)
+
+// For more information, see http://www.boost.org
+#ifndef BOOST_FUNCTION_EQUAL_HPP
+#define BOOST_FUNCTION_EQUAL_HPP
+
+namespace boost {
+
+namespace detail {
+  template<typename F, typename G>
+    bool function_equal_impl(const F& f, const G& g, long)
+    { return f == g; }
+} // end namespace boost::function
+
+template<typename F, typename G>
+  bool function_equal(const F& f, const G& g)
+  { return ::boost::detail::function_equal_impl(f, g, 0); }
+
+} // end namespace boost
+
+#endif // BOOST_FUNCTION_EQUAL_HPP