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authorRemko Tronçon <git@el-tramo.be>2009-06-01 08:48:42 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-06-01 09:24:28 (GMT)
commit2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch)
treed46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/detail/reference_content.hpp
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+//-----------------------------------------------------------------------------
+// boost detail/reference_content.hpp header file
+// See http://www.boost.org for updates, documentation, and revision history.
+//-----------------------------------------------------------------------------
+//
+// Copyright (c) 2003
+// Eric Friedman
+//
+// 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_DETAIL_REFERENCE_CONTENT_HPP
+#define BOOST_DETAIL_REFERENCE_CONTENT_HPP
+
+#include "boost/config.hpp"
+
+#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
+# include "boost/mpl/bool.hpp"
+# include "boost/type_traits/has_nothrow_copy.hpp"
+#else
+# include "boost/mpl/if.hpp"
+# include "boost/type_traits/is_reference.hpp"
+#endif
+
+#include "boost/mpl/void.hpp"
+
+namespace boost {
+
+namespace detail {
+
+///////////////////////////////////////////////////////////////////////////////
+// (detail) class template reference_content
+//
+// Non-Assignable wrapper for references.
+//
+template <typename RefT>
+class reference_content
+{
+private: // representation
+
+ RefT content_;
+
+public: // structors
+
+ ~reference_content()
+ {
+ }
+
+ reference_content(RefT r)
+ : content_( r )
+ {
+ }
+
+ reference_content(const reference_content& operand)
+ : content_( operand.content_ )
+ {
+ }
+
+private: // non-Assignable
+
+ reference_content& operator=(const reference_content&);
+
+public: // queries
+
+ RefT get() const
+ {
+ return content_;
+ }
+
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// (detail) metafunction make_reference_content
+//
+// Wraps with reference_content if specified type is reference.
+//
+
+template <typename T = mpl::void_> struct make_reference_content;
+
+#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
+
+template <typename T>
+struct make_reference_content
+{
+ typedef T type;
+};
+
+template <typename T>
+struct make_reference_content< T& >
+{
+ typedef reference_content<T&> type;
+};
+
+#else // defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
+
+template <typename T>
+struct make_reference_content
+ : mpl::if_<
+ is_reference<T>
+ , reference_content<T>
+ , T
+ >
+{
+};
+
+#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION workaround
+
+template <>
+struct make_reference_content< mpl::void_ >
+{
+ template <typename T>
+ struct apply
+ : make_reference_content<T>
+ {
+ };
+
+ typedef mpl::void_ type;
+};
+
+} // namespace detail
+
+///////////////////////////////////////////////////////////////////////////////
+// reference_content<T&> type traits specializations
+//
+
+#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
+
+template <typename T>
+struct has_nothrow_copy<
+ ::boost::detail::reference_content< T& >
+ >
+ : mpl::true_
+{
+};
+
+#endif // !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
+
+} // namespace boost
+
+#endif // BOOST_DETAIL_REFERENCE_CONTENT_HPP