New upstream version 8.1.0

thirdparty/source/boost_1_61_0/boost/mpl/identity.hpp

@@ -0,0 +1,45 @@
+
+#ifndef BOOST_MPL_IDENTITY_HPP_INCLUDED
+#define BOOST_MPL_IDENTITY_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 2000-2004
+//
+// 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/mpl for documentation.
+
+// $Id$
+// $Date$
+// $Revision$
+
+#include <boost/mpl/aux_/na_spec.hpp>
+#include <boost/mpl/aux_/lambda_support.hpp>
+
+namespace boost { namespace mpl {
+
+template<
+      typename BOOST_MPL_AUX_NA_PARAM(T)
+    >
+struct identity
+{
+    typedef T type;
+    BOOST_MPL_AUX_LAMBDA_SUPPORT(1, identity, (T))
+};
+
+template<
+      typename BOOST_MPL_AUX_NA_PARAM(T)
+    >
+struct make_identity
+{
+    typedef identity<T> type;
+    BOOST_MPL_AUX_LAMBDA_SUPPORT(1, make_identity, (T))
+};
+
+BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, identity)
+BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, make_identity)
+
+}}
+
+#endif // BOOST_MPL_IDENTITY_HPP_INCLUDED