comparison DEPENDENCIES/generic/include/boost/log/detail/copy_cv.hpp @ 102:f46d142149f5

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+/*
+ *          Copyright Andrey Semashev 2007 - 2015.
+ * 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)
+ */
+/*!
+ * \file   copy_cv.hpp
+ * \author Andrey Semashev
+ * \date   16.03.2014
+ *
+ * The header defines \c copy_cv type trait which copies const/volatile qualifiers from one type to another
+ */
+
+#ifndef BOOST_LOG_DETAIL_COPY_CV_HPP_INCLUDED_
+#define BOOST_LOG_DETAIL_COPY_CV_HPP_INCLUDED_
+
+#include <boost/log/detail/config.hpp>
+#include <boost/log/detail/header.hpp>
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+namespace boost {
+
+BOOST_LOG_OPEN_NAMESPACE
+
+namespace aux {
+
+//! The type trait copies top level const/volatile qualifiers from \c FromT to \c ToT
+template< typename FromT, typename ToT >
+struct copy_cv
+{
+    typedef ToT type;
+};
+
+template< typename FromT, typename ToT >
+struct copy_cv< const FromT, ToT >
+{
+    typedef const ToT type;
+};
+
+template< typename FromT, typename ToT >
+struct copy_cv< volatile FromT, ToT >
+{
+    typedef volatile ToT type;
+};
+
+template< typename FromT, typename ToT >
+struct copy_cv< const volatile FromT, ToT >
+{
+    typedef const volatile ToT type;
+};
+
+} // namespace aux
+
+BOOST_LOG_CLOSE_NAMESPACE // namespace log
+
+} // namespace boost
+
+#include <boost/log/detail/footer.hpp>
+
+#endif // BOOST_LOG_DETAIL_COPY_CV_HPP_INCLUDED_