Added boost header

test/external/boost/xpressive/detail/utility/ignore_unused.hpp

@@ -0,0 +1,24 @@
+///////////////////////////////////////////////////////////////////////////////
+// ignore_unused.hpp
+//
+//  Copyright 2008 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)
+
+#ifndef BOOST_XPRESSIVE_DETAIL_UTILITY_IGNORE_UNUSED_HPP_EAN_10_04_2005
+#define BOOST_XPRESSIVE_DETAIL_UTILITY_IGNORE_UNUSED_HPP_EAN_10_04_2005
+
+// MS compatible compilers support #pragma once
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+#include "boost/proto/detail/ignore_unused.hpp"
+
+namespace boost { namespace xpressive { namespace detail
+{
+  using boost::proto::detail::ignore_unused;
+}}}
+
+#endif
+