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diff --git a/boost/log/detail/tagged_integer.hpp b/boost/log/detail/tagged_integer.hpp
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+++ b/boost/log/detail/tagged_integer.hpp
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+/*
+ *          Copyright Andrey Semashev 2007 - 2014.
+ * 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   tagged_integer.hpp
+ * \author Andrey Semashev
+ * \date   11.01.2008
+ *
+ * \brief  This header is the Boost.Log library implementation, see the library documentation
+ *         at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
+ */
+
+#ifndef BOOST_LOG_TAGGED_INTEGER_HPP_INCLUDED_
+#define BOOST_LOG_TAGGED_INTEGER_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 {
+
+//! A tagged integer wrapper for type safety
+template< typename IntT, typename TagT >
+struct tagged_integer
+{
+    //! Contained value type
+    typedef IntT integer_type;
+    //! Tag
+    typedef TagT tag;
+
+    //! Contained value
+    integer_type value;
+
+    //! Conversion operator
+    operator integer_type() const { return value; }
+
+    //  Increment
+    tagged_integer& operator++ () { ++value; return *this; }
+    tagged_integer operator++ (int) { tagged_integer temp = *this; ++value; return temp; }
+    //  Decrement
+    tagged_integer& operator-- () { --value; return *this; }
+    tagged_integer operator-- (int) { tagged_integer temp = *this; --value; return temp; }
+
+#define BOOST_LOG_TAGGED_INTEGER_OP(op)\
+    tagged_integer& operator op (tagged_integer const& that) { value op that.value; return *this; }
+
+    BOOST_LOG_TAGGED_INTEGER_OP(|=)
+    BOOST_LOG_TAGGED_INTEGER_OP(&=)
+    BOOST_LOG_TAGGED_INTEGER_OP(^=)
+    BOOST_LOG_TAGGED_INTEGER_OP(+=)
+    BOOST_LOG_TAGGED_INTEGER_OP(-=)
+    BOOST_LOG_TAGGED_INTEGER_OP(*=)
+    BOOST_LOG_TAGGED_INTEGER_OP(/=)
+    BOOST_LOG_TAGGED_INTEGER_OP(%=)
+
+#undef BOOST_LOG_TAGGED_INTEGER_OP
+
+    //! Inversion operator
+    tagged_integer& operator~ () { ~value; return *this; }
+
+    //  Shift operators
+    template< typename T >
+    tagged_integer& operator<<= (T const& that) { value <<= that; return *this; }
+    template< typename T >
+    tagged_integer& operator>>= (T const& that) { value >>= that; return *this; }
+
+private:
+    //  Protection against improper usage
+    template< typename T1, typename T2 >
+    tagged_integer& operator<<= (tagged_integer< T1, T2 > const&);
+    template< typename T1, typename T2 >
+    tagged_integer& operator>>= (tagged_integer< T1, T2 > const&);
+};
+
+    //  Relational operators
+#define BOOST_LOG_TAGGED_INTEGER_OP(op)\
+    template< typename IntT, typename TagT >\
+    inline bool operator op (\
+        tagged_integer< IntT, TagT > const& left, tagged_integer< IntT, TagT > const& right)\
+    {\
+        return (left.value op right.value);\
+    }
+
+BOOST_LOG_TAGGED_INTEGER_OP(==)
+BOOST_LOG_TAGGED_INTEGER_OP(!=)
+BOOST_LOG_TAGGED_INTEGER_OP(<)
+BOOST_LOG_TAGGED_INTEGER_OP(>)
+BOOST_LOG_TAGGED_INTEGER_OP(<=)
+BOOST_LOG_TAGGED_INTEGER_OP(>=)
+
+#undef BOOST_LOG_TAGGED_INTEGER_OP
+
+#define BOOST_LOG_TAGGED_INTEGER_OP(op)\
+    template< typename IntT, typename TagT >\
+    inline tagged_integer< IntT, TagT > operator op (\
+        tagged_integer< IntT, TagT > const& left, tagged_integer< IntT, TagT > const& right)\
+    {\
+        tagged_integer< IntT, TagT > temp = left;\
+        temp op##= right;\
+        return temp;\
+    }
+
+BOOST_LOG_TAGGED_INTEGER_OP(|)
+BOOST_LOG_TAGGED_INTEGER_OP(&)
+BOOST_LOG_TAGGED_INTEGER_OP(^)
+BOOST_LOG_TAGGED_INTEGER_OP(+)
+BOOST_LOG_TAGGED_INTEGER_OP(-)
+BOOST_LOG_TAGGED_INTEGER_OP(*)
+BOOST_LOG_TAGGED_INTEGER_OP(/)
+BOOST_LOG_TAGGED_INTEGER_OP(%)
+
+#undef BOOST_LOG_TAGGED_INTEGER_OP
+
+#define BOOST_LOG_TAGGED_INTEGER_OP(op)\
+    template< typename IntT, typename TagT, typename T >\
+    inline tagged_integer< IntT, TagT > operator op (\
+        tagged_integer< IntT, TagT > const& left, T const& right)\
+    {\
+        tagged_integer< IntT, TagT > temp = left;\
+        temp op##= right;\
+        return temp;\
+    }
+
+BOOST_LOG_TAGGED_INTEGER_OP(<<)
+BOOST_LOG_TAGGED_INTEGER_OP(>>)
+
+#undef BOOST_LOG_TAGGED_INTEGER_OP
+
+} // namespace aux
+
+BOOST_LOG_CLOSE_NAMESPACE // namespace log
+
+} // namespace boost
+
+#include <boost/log/detail/footer.hpp>
+
+#endif // BOOST_LOG_TAGGED_INTEGER_HPP_INCLUDED_