Initial Commit

2018-02-08 21:28:33 -05:00
commit 678c1d3966
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+//  add_rvalue_reference.hpp  ---------------------------------------------------------//
+
+//  Copyright 2010 Vicente J. Botet Escriba
+
+//  Distributed under the Boost Software License, Version 1.0.
+//  See http://www.boost.org/LICENSE_1_0.txt
+
+#ifndef BOOST_TYPE_TRAITS_EXT_ADD_RVALUE_REFERENCE__HPP
+#define BOOST_TYPE_TRAITS_EXT_ADD_RVALUE_REFERENCE__HPP
+
+#include <boost/config.hpp>
+
+//----------------------------------------------------------------------------//
+
+#include <boost/type_traits/is_void.hpp>
+#include <boost/type_traits/is_reference.hpp>
+
+//----------------------------------------------------------------------------//
+//                                                                            //
+//                           C++03 implementation of                          //
+//             20.9.7.2 Reference modifications [meta.trans.ref]              //
+//                          Written by Vicente J. Botet Escriba               //
+//                                                                            //
+// If T names an object or function type then the member typedef type
+// shall name T&&; otherwise, type shall name T. [ Note: This rule reflects
+// the semantics of reference collapsing. For example, when a type T names
+// a type T1&, the type add_rvalue_reference<T>::type is not an rvalue
+// reference. -end note ]
+//----------------------------------------------------------------------------//
+
+namespace boost {
+
+namespace type_traits_detail {
+
+    template <typename T, bool b>
+    struct add_rvalue_reference_helper
+    { typedef T   type; };
+
+#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
+    template <typename T>
+    struct add_rvalue_reference_helper<T, true>
+    {
+        typedef T&&   type;
+    };
+#endif
+
+    template <typename T>
+    struct add_rvalue_reference_imp
+    {
+       typedef typename boost::type_traits_detail::add_rvalue_reference_helper
+                  <T, (is_void<T>::value == false && is_reference<T>::value == false) >::type type;
+    };
+
+}
+
+template <class T> struct add_rvalue_reference
+{
+   typedef typename boost::type_traits_detail::add_rvalue_reference_imp<T>::type type;
+};
+
+}  // namespace boost
+
+#endif  // BOOST_TYPE_TRAITS_EXT_ADD_RVALUE_REFERENCE__HPP
+