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diff --git a/boost/log/detail/custom_terminal_spec.hpp b/boost/log/detail/custom_terminal_spec.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   custom_terminal_spec.hpp
+ * \author Andrey Semashev
+ * \date   29.01.2012
+ *
+ * The header contains Boost.Phoenix custom terminal specialization for Boost.Log terminals.
+ */
+
+#ifndef BOOST_LOG_DETAIL_CUSTOM_TERMINAL_SPEC_HPP_INCLUDED_
+#define BOOST_LOG_DETAIL_CUSTOM_TERMINAL_SPEC_HPP_INCLUDED_
+
+#include <boost/mpl/bool.hpp>
+#include <boost/phoenix/core/terminal_fwd.hpp>
+#include <boost/phoenix/core/is_nullary.hpp>
+#include <boost/phoenix/core/terminal.hpp> // needed for terminal-related part of the grammar
+#include <boost/type_traits/remove_cv.hpp>
+#include <boost/type_traits/remove_reference.hpp>
+#include <boost/utility/result_of.hpp>
+#include <boost/log/detail/config.hpp>
+#include <boost/log/detail/header.hpp>
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+namespace boost {
+
+namespace phoenix {
+
+template< typename T >
+struct is_custom_terminal< T, typename T::_is_boost_log_terminal > :
+    public mpl::true_
+{
+};
+
+template< typename T >
+struct custom_terminal< T, typename T::_is_boost_log_terminal >
+{
+    typedef custom_terminal< T, typename T::_is_boost_log_terminal > this_type;
+
+    template< typename >
+    struct result;
+
+    template< typename ThisT, typename TermT, typename ContextT >
+    struct result< ThisT(TermT, ContextT) >
+    {
+        typedef typename remove_cv< typename remove_reference< TermT >::type >::type term;
+        typedef typename boost::result_of< const term(ContextT) >::type type;
+    };
+
+    template< typename ContextT >
+    typename result< const this_type(T const&, ContextT&) >::type operator() (T const& term, ContextT& ctx) const
+    {
+        return term(ctx);
+    }
+};
+
+} // namespace phoenix
+
+} // namespace boost
+
+#include <boost/log/detail/footer.hpp>
+
+#endif // BOOST_LOG_DETAIL_CUSTOM_TERMINAL_SPEC_HPP_INCLUDED_