Added boost header

test/external/boost/foreach_fwd.hpp

@@ -0,0 +1,51 @@
+///////////////////////////////////////////////////////////////////////////////
+// foreach.hpp header file
+//
+// Copyright 2010 Eric Niebler.
+// 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)
+// See http://www.boost.org/libs/foreach for documentation
+//
+// Credits:
+// Kazutoshi Satoda: for suggesting the need for a _fwd header for foreach's
+//                      customization points.
+
+#ifndef BOOST_FOREACH_FWD_HPP
+#define BOOST_FOREACH_FWD_HPP
+
+// This must be at global scope, hence the uglified name
+enum boost_foreach_argument_dependent_lookup_hack
+{
+    boost_foreach_argument_dependent_lookup_hack_value
+};
+
+namespace boost
+{
+
+namespace foreach
+{
+    ///////////////////////////////////////////////////////////////////////////////
+    // boost::foreach::tag
+    //
+    typedef boost_foreach_argument_dependent_lookup_hack tag;
+
+    ///////////////////////////////////////////////////////////////////////////////
+    // boost::foreach::is_lightweight_proxy
+    //   Specialize this for user-defined collection types if they are inexpensive to copy.
+    //   This tells BOOST_FOREACH it can avoid the rvalue/lvalue detection stuff.
+    template<typename T>
+    struct is_lightweight_proxy;
+
+    ///////////////////////////////////////////////////////////////////////////////
+    // boost::foreach::is_noncopyable
+    //   Specialize this for user-defined collection types if they cannot be copied.
+    //   This also tells BOOST_FOREACH to avoid the rvalue/lvalue detection stuff.
+    template<typename T>
+    struct is_noncopyable;
+
+} // namespace foreach
+
+} // namespace boost
+
+#endif