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diff --git a/src/boost/libs/log/example/wide_char/main.cpp b/src/boost/libs/log/example/wide_char/main.cpp
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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   main.cpp
+ * \author Andrey Semashev
+ * \date   01.12.2012
+ *
+ * \brief  An example of wide character logging.
+ */
+
+#include <iostream>
+#include <boost/locale/generator.hpp>
+#include <boost/date_time/posix_time/posix_time_types.hpp>
+
+#include <boost/log/common.hpp>
+#include <boost/log/expressions.hpp>
+#include <boost/log/utility/setup/file.hpp>
+#include <boost/log/utility/setup/console.hpp>
+#include <boost/log/utility/setup/common_attributes.hpp>
+#include <boost/log/sources/logger.hpp>
+#include <boost/log/support/date_time.hpp>
+
+namespace logging = boost::log;
+namespace sinks = boost::log::sinks;
+namespace attrs = boost::log::attributes;
+namespace src = boost::log::sources;
+namespace expr = boost::log::expressions;
+namespace keywords = boost::log::keywords;
+
+//[ example_wide_char_severity_level_definition
+enum severity_level
+{
+    normal,
+    notification,
+    warning,
+    error,
+    critical
+};
+
+template< typename CharT, typename TraitsT >
+inline std::basic_ostream< CharT, TraitsT >& operator<< (
+    std::basic_ostream< CharT, TraitsT >& strm, severity_level lvl)
+{
+    static const char* const str[] =
+    {
+        "normal",
+        "notification",
+        "warning",
+        "error",
+        "critical"
+    };
+    if (static_cast< std::size_t >(lvl) < (sizeof(str) / sizeof(*str)))
+        strm << str[lvl];
+    else
+        strm << static_cast< int >(lvl);
+    return strm;
+}
+//]
+
+//[ example_wide_char_logging_initialization
+// Declare attribute keywords
+BOOST_LOG_ATTRIBUTE_KEYWORD(severity, "Severity", severity_level)
+BOOST_LOG_ATTRIBUTE_KEYWORD(timestamp, "TimeStamp", boost::posix_time::ptime)
+
+void init_logging()
+{
+    boost::shared_ptr< sinks::synchronous_sink< sinks::text_file_backend > > sink = logging::add_file_log
+    (
+        "sample.log",
+        keywords::format = expr::stream
+            << expr::format_date_time(timestamp, "%Y-%m-%d, %H:%M:%S.%f")
+            << " <" << severity.or_default(normal)
+            << "> " << expr::message
+    );
+
+    // The sink will perform character code conversion as needed, according to the locale set with imbue()
+    std::locale loc = boost::locale::generator()("en_US.UTF-8");
+    sink->imbue(loc);
+
+    // Let's add some commonly used attributes, like timestamp and record counter.
+    logging::add_common_attributes();
+}
+//]
+
+//[ example_wide_char_logging
+void test_narrow_char_logging()
+{
+    // Narrow character logging still works
+    src::logger lg;
+    BOOST_LOG(lg) << "Hello, World! This is a narrow character message.";
+}
+
+void test_wide_char_logging()
+{
+    src::wlogger lg;
+    BOOST_LOG(lg) << L"Hello, World! This is a wide character message.";
+
+    // National characters are also supported
+    const wchar_t national_chars[] = { 0x041f, 0x0440, 0x0438, 0x0432, 0x0435, 0x0442, L',', L' ', 0x043c, 0x0438, 0x0440, L'!', 0 };
+    BOOST_LOG(lg) << national_chars;
+
+    // Now, let's try logging with severity
+    src::wseverity_logger< severity_level > slg;
+    BOOST_LOG_SEV(slg, normal) << L"A normal severity message, will not pass to the file";
+    BOOST_LOG_SEV(slg, warning) << L"A warning severity message, will pass to the file";
+    BOOST_LOG_SEV(slg, error) << L"An error severity message, will pass to the file";
+}
+//]
+
+int main(int argc, char* argv[])
+{
+    init_logging();
+    test_narrow_char_logging();
+    test_wide_char_logging();
+
+    return 0;
+}