Imported Upstream version 1.57.0upstream/1.57.0

1 files changed, 653 insertions, 0 deletions

diff --git a/boost/log/expressions/formatters/named_scope.hpp b/boost/log/expressions/formatters/named_scope.hpp
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+++ b/boost/log/expressions/formatters/named_scope.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   formatters/named_scope.hpp
+ * \author Andrey Semashev
+ * \date   11.11.2012
+ *
+ * The header contains a formatter function for named scope attribute values.
+ */
+
+#ifndef BOOST_LOG_EXPRESSIONS_FORMATTERS_NAMED_SCOPE_HPP_INCLUDED_
+#define BOOST_LOG_EXPRESSIONS_FORMATTERS_NAMED_SCOPE_HPP_INCLUDED_
+
+#include <string>
+#include <iterator>
+#include <utility>
+#include <boost/static_assert.hpp>
+#include <boost/type_traits/is_same.hpp>
+#include <boost/move/core.hpp>
+#include <boost/move/utility.hpp>
+#include <boost/parameter/binding.hpp>
+#include <boost/preprocessor/iteration/iterate.hpp>
+#include <boost/preprocessor/repetition/enum_params.hpp>
+#include <boost/preprocessor/repetition/enum_binary_params.hpp>
+#include <boost/phoenix/core/actor.hpp>
+#include <boost/phoenix/core/terminal_fwd.hpp>
+#include <boost/phoenix/core/is_nullary.hpp>
+#include <boost/phoenix/core/environment.hpp>
+#include <boost/fusion/sequence/intrinsic/at_c.hpp>
+#include <boost/log/detail/config.hpp>
+#include <boost/log/attributes/attribute_name.hpp>
+#include <boost/log/attributes/fallback_policy.hpp>
+#include <boost/log/attributes/named_scope.hpp>
+#include <boost/log/attributes/value_visitation.hpp>
+#include <boost/log/detail/light_function.hpp>
+#include <boost/log/detail/parameter_tools.hpp>
+#include <boost/log/detail/custom_terminal_spec.hpp>
+#include <boost/log/detail/deduce_char_type.hpp>
+#include <boost/log/detail/attr_output_terminal.hpp>
+#include <boost/log/expressions/attr_fwd.hpp>
+#include <boost/log/expressions/keyword_fwd.hpp>
+#include <boost/log/utility/formatting_ostream.hpp>
+#include <boost/log/utility/string_literal_fwd.hpp>
+#include <boost/log/utility/functional/bind.hpp>
+#include <boost/log/keywords/format.hpp>
+#include <boost/log/keywords/delimiter.hpp>
+#include <boost/log/keywords/depth.hpp>
+#include <boost/log/keywords/iteration.hpp>
+#include <boost/log/keywords/empty_marker.hpp>
+#include <boost/log/keywords/incomplete_marker.hpp>
+#include <boost/log/detail/header.hpp>
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+namespace boost {
+
+BOOST_LOG_OPEN_NAMESPACE
+
+namespace expressions {
+
+//! Scope iteration directions
+enum scope_iteration_direction
+{
+    forward,    //!< Iterate through scopes from outermost to innermost
+    reverse     //!< Iterate through scopes from innermost to outermost
+};
+
+namespace aux {
+
+#ifdef BOOST_LOG_USE_CHAR
+//! Parses the named scope format string and constructs the formatter function
+BOOST_LOG_API boost::log::aux::light_function< void (basic_formatting_ostream< char >&, attributes::named_scope::value_type::value_type const&) >
+parse_named_scope_format(const char* begin, const char* end);
+#endif
+
+#ifdef BOOST_LOG_USE_WCHAR_T
+//! Parses the named scope format string and constructs the formatter function
+BOOST_LOG_API boost::log::aux::light_function< void (basic_formatting_ostream< wchar_t >&, attributes::named_scope::value_type::value_type const&) >
+parse_named_scope_format(const wchar_t* begin, const wchar_t* end);
+#endif
+
+//! Parses the named scope format string and constructs the formatter function
+template< typename CharT >
+inline boost::log::aux::light_function< void (basic_formatting_ostream< CharT >&, attributes::named_scope::value_type::value_type const&) >
+parse_named_scope_format(const CharT* format)
+{
+    return parse_named_scope_format(format, format + std::char_traits< CharT >::length(format));
+}
+
+//! Parses the named scope format string and constructs the formatter function
+template< typename CharT, typename TraitsT, typename AllocatorT >
+inline boost::log::aux::light_function< void (basic_formatting_ostream< CharT >&, attributes::named_scope::value_type::value_type const&) >
+parse_named_scope_format(std::basic_string< CharT, TraitsT, AllocatorT > const& format)
+{
+    const CharT* p = format.c_str();
+    return parse_named_scope_format(p, p + format.size());
+}
+
+//! Parses the named scope format string and constructs the formatter function
+template< typename CharT, typename TraitsT >
+inline boost::log::aux::light_function< void (basic_formatting_ostream< CharT >&, attributes::named_scope::value_type::value_type const&) >
+parse_named_scope_format(basic_string_literal< CharT, TraitsT > const& format)
+{
+    const CharT* p = format.c_str();
+    return parse_named_scope_format(p, p + format.size());
+}
+
+template< typename CharT >
+class format_named_scope_impl
+{
+public:
+    //! Function result type
+    typedef void result_type;
+
+    //! Character type
+    typedef CharT char_type;
+    //! String type
+    typedef std::basic_string< char_type > string_type;
+    //! Formatting stream type
+    typedef basic_formatting_ostream< char_type > stream_type;
+    //! Attribute value type
+    typedef attributes::named_scope::value_type value_type;
+    //! Named scope formatter
+    typedef boost::log::aux::light_function< void (stream_type&, value_type::value_type const&) > element_formatter_type;
+
+private:
+    //! Element formatting function
+    element_formatter_type m_element_formatter;
+    //! Element delimiter
+    string_type m_delimiter;
+    //! Incomplete list marker
+    string_type m_incomplete_marker;
+    //! Empty list marker
+    string_type m_empty_marker;
+    //! Maximum number of elements to output
+    value_type::size_type m_depth;
+    //! Iteration direction
+    scope_iteration_direction m_direction;
+
+public:
+    //! Initializing constructor
+    format_named_scope_impl
+    (
+        element_formatter_type const& element_formatter,
+        string_type const& delimiter,
+        string_type const& incomplete_marker,
+        string_type const& empty_marker,
+        value_type::size_type depth,
+        scope_iteration_direction direction
+    ) :
+        m_element_formatter(element_formatter),
+        m_delimiter(delimiter),
+        m_incomplete_marker(incomplete_marker),
+        m_empty_marker(empty_marker),
+        m_depth(depth),
+        m_direction(direction)
+    {
+    }
+    //! Copy constructor
+    format_named_scope_impl(format_named_scope_impl const& that) :
+        m_element_formatter(that.m_element_formatter),
+        m_delimiter(that.m_delimiter),
+        m_incomplete_marker(that.m_incomplete_marker),
+        m_empty_marker(that.m_empty_marker),
+        m_depth(that.m_depth),
+        m_direction(that.m_direction)
+    {
+    }
+
+    //! Formatting operator
+    result_type operator() (stream_type& strm, value_type const& scopes) const
+    {
+        if (!scopes.empty())
+        {
+            if (m_direction == expressions::forward)
+                format_forward(strm, scopes);
+            else
+                format_reverse(strm, scopes);
+        }
+        else
+        {
+            strm << m_empty_marker;
+        }
+    }
+
+private:
+    //! The function performs formatting of the extracted scope stack in forward direction
+    void format_forward(stream_type& strm, value_type const& scopes) const
+    {
+        value_type::const_iterator it, end = scopes.end();
+        if (m_depth > 0)
+        {
+            value_type::size_type const scopes_to_iterate = (std::min)(m_depth, scopes.size());
+            it = scopes.end();
+            std::advance(it, -static_cast< value_type::difference_type >(scopes_to_iterate));
+        }
+        else
+        {
+            it = scopes.begin();
+        }
+
+        if (it != end)
+        {
+            if (it != scopes.begin())
+                strm << m_incomplete_marker;
+
+            m_element_formatter(strm, *it);
+            for (++it; it != end; ++it)
+            {
+                strm << m_delimiter;
+                m_element_formatter(strm, *it);
+            }
+        }
+    }
+    //! The function performs formatting of the extracted scope stack in reverse direction
+    void format_reverse(stream_type& strm, value_type const& scopes) const
+    {
+        value_type::const_reverse_iterator it = scopes.rbegin(), end;
+        if (m_depth > 0)
+        {
+            value_type::size_type const scopes_to_iterate = (std::min)(m_depth, scopes.size());
+            end = it;
+            std::advance(end, static_cast< value_type::difference_type >(scopes_to_iterate));
+        }
+        else
+        {
+            end = scopes.rend();
+        }
+
+        if (it != end)
+        {
+            m_element_formatter(strm, *it);
+            for (++it; it != end; ++it)
+            {
+                strm << m_delimiter;
+                m_element_formatter(strm, *it);
+            }
+
+            if (it != scopes.rend())
+                strm << m_incomplete_marker;
+        }
+    }
+};
+
+} // namespace aux
+
+/*!
+ * Named scope formatter terminal.
+ */
+template< typename FallbackPolicyT, typename CharT >
+class format_named_scope_terminal
+{
+public:
+    //! Internal typedef for type categorization
+    typedef void _is_boost_log_terminal;
+
+    //! Attribute value type
+    typedef attributes::named_scope::value_type value_type;
+    //! Fallback policy
+    typedef FallbackPolicyT fallback_policy;
+    //! Character type
+    typedef CharT char_type;
+    //! String type
+    typedef std::basic_string< char_type > string_type;
+    //! Formatting stream type
+    typedef basic_formatting_ostream< char_type > stream_type;
+    //! Formatter function
+    typedef aux::format_named_scope_impl< char_type > formatter_function_type;
+
+    //! Function result type
+    typedef string_type result_type;
+
+private:
+    //! Attribute value visitor invoker
+    typedef value_visitor_invoker< value_type, fallback_policy > visitor_invoker_type;
+
+private:
+    //! Attribute name
+    attribute_name m_name;
+    //! Formatter function
+    formatter_function_type m_formatter;
+    //! Attribute value visitor invoker
+    visitor_invoker_type m_visitor_invoker;
+
+public:
+    //! Initializing constructor
+    template< typename FormatT >
+    format_named_scope_terminal
+    (
+        attribute_name const& name,
+        fallback_policy const& fallback,
+        FormatT const& element_format,
+        string_type const& delimiter,
+        string_type const& incomplete_marker,
+        string_type const& empty_marker,
+        value_type::size_type depth,
+        scope_iteration_direction direction
+    ) :
+        m_name(name), m_formatter(aux::parse_named_scope_format(element_format), delimiter, incomplete_marker, empty_marker, depth, direction), m_visitor_invoker(fallback)
+    {
+    }
+    //! Copy constructor
+    format_named_scope_terminal(format_named_scope_terminal const& that) :
+        m_name(that.m_name), m_formatter(that.m_formatter), m_visitor_invoker(that.m_visitor_invoker)
+    {
+    }
+
+    //! Returns attribute name
+    attribute_name get_name() const
+    {
+        return m_name;
+    }
+
+    //! Returns fallback policy
+    fallback_policy const& get_fallback_policy() const
+    {
+        return m_visitor_invoker.get_fallback_policy();
+    }
+
+    //! Retruns formatter function
+    formatter_function_type const& get_formatter_function() const
+    {
+        return m_formatter;
+    }
+
+    //! Invokation operator
+    template< typename ContextT >
+    result_type operator() (ContextT const& ctx)
+    {
+        string_type str;
+        stream_type strm(str);
+        m_visitor_invoker(m_name, fusion::at_c< 0 >(phoenix::env(ctx).args()), binder1st< formatter_function_type&, stream_type& >(m_formatter, strm));
+        strm.flush();
+        return boost::move(str);
+    }
+
+    //! Invokation operator
+    template< typename ContextT >
+    result_type operator() (ContextT const& ctx) const
+    {
+        string_type str;
+        stream_type strm(str);
+        m_visitor_invoker(m_name, fusion::at_c< 0 >(phoenix::env(ctx).args()), binder1st< formatter_function_type const&, stream_type& >(m_formatter, strm));
+        strm.flush();
+        return boost::move(str);
+    }
+
+    BOOST_DELETED_FUNCTION(format_named_scope_terminal())
+};
+
+/*!
+ * Named scope formatter actor.
+ */
+template< typename FallbackPolicyT, typename CharT, template< typename > class ActorT = phoenix::actor >
+class format_named_scope_actor :
+    public ActorT< format_named_scope_terminal< FallbackPolicyT, CharT > >
+{
+public:
+    //! Character type
+    typedef CharT char_type;
+    //! Fallback policy
+    typedef FallbackPolicyT fallback_policy;
+    //! Base terminal type
+    typedef format_named_scope_terminal< fallback_policy, char_type > terminal_type;
+    //! Attribute value type
+    typedef typename terminal_type::value_type value_type;
+    //! Formatter function
+    typedef typename terminal_type::formatter_function_type formatter_function_type;
+
+    //! Base actor type
+    typedef ActorT< terminal_type > base_type;
+
+public:
+    //! Initializing constructor
+    explicit format_named_scope_actor(base_type const& act) : base_type(act)
+    {
+    }
+
+    /*!
+     * \returns The attribute name
+     */
+    attribute_name get_name() const
+    {
+        return this->proto_expr_.child0.get_name();
+    }
+
+    /*!
+     * \returns Fallback policy
+     */
+    fallback_policy const& get_fallback_policy() const
+    {
+        return this->proto_expr_.child0.get_fallback_policy();
+    }
+
+    /*!
+     * \returns Formatter function
+     */
+    formatter_function_type const& get_formatter_function() const
+    {
+        return this->proto_expr_.child0.get_formatter_function();
+    }
+};
+
+#ifndef BOOST_LOG_DOXYGEN_PASS
+
+#define BOOST_LOG_AUX_OVERLOAD(left_ref, right_ref)\
+    template< typename LeftExprT, typename FallbackPolicyT, typename CharT >\
+    BOOST_FORCEINLINE phoenix::actor< aux::attribute_output_terminal< phoenix::actor< LeftExprT >, attributes::named_scope::value_type, FallbackPolicyT, typename format_named_scope_actor< FallbackPolicyT, CharT >::formatter_function_type > >\
+    operator<< (phoenix::actor< LeftExprT > left_ref left, format_named_scope_actor< FallbackPolicyT, CharT > right_ref right)\
+    {\
+        typedef aux::attribute_output_terminal< phoenix::actor< LeftExprT >, attributes::named_scope::value_type, FallbackPolicyT, typename format_named_scope_actor< FallbackPolicyT, CharT >::formatter_function_type > terminal_type;\
+        phoenix::actor< terminal_type > actor = {{ terminal_type(left, right.get_name(), right.get_formatter_function(), right.get_fallback_policy()) }};\
+        return actor;\
+    }
+
+#include <boost/log/detail/generate_overloads.hpp>
+
+#undef BOOST_LOG_AUX_OVERLOAD
+
+#endif // BOOST_LOG_DOXYGEN_PASS
+
+namespace aux {
+
+//! Auxiliary traits to acquire default formatter parameters depending on the character type
+template< typename CharT >
+struct default_named_scope_params;
+
+#ifdef BOOST_LOG_USE_CHAR
+template< >
+struct default_named_scope_params< char >
+{
+    static const char* forward_delimiter() { return "->"; }
+    static const char* reverse_delimiter() { return "<-"; }
+    static const char* incomplete_marker() { return "..."; }
+    static const char* empty_marker() { return ""; }
+};
+#endif
+#ifdef BOOST_LOG_USE_WCHAR_T
+template< >
+struct default_named_scope_params< wchar_t >
+{
+    static const wchar_t* forward_delimiter() { return L"->"; }
+    static const wchar_t* reverse_delimiter() { return L"<-"; }
+    static const wchar_t* incomplete_marker() { return L"..."; }
+    static const wchar_t* empty_marker() { return L""; }
+};
+#endif
+
+template< typename CharT, template< typename > class ActorT, typename FallbackPolicyT, typename ArgsT >
+BOOST_FORCEINLINE format_named_scope_actor< FallbackPolicyT, CharT, ActorT > format_named_scope(attribute_name const& name, FallbackPolicyT const& fallback, ArgsT const& args)
+{
+    typedef format_named_scope_actor< FallbackPolicyT, CharT, ActorT > actor_type;
+    typedef typename actor_type::terminal_type terminal_type;
+    typedef default_named_scope_params< CharT > default_params;
+    scope_iteration_direction dir = args[keywords::iteration | expressions::forward];
+    const CharT* default_delimiter = (dir == expressions::forward ? default_params::forward_delimiter() : default_params::reverse_delimiter());
+    typename actor_type::base_type act =
+    {{
+         terminal_type
+         (
+             name,
+             fallback,
+             args[keywords::format],
+             args[keywords::delimiter | default_delimiter],
+             args[keywords::incomplete_marker | default_params::incomplete_marker()],
+             args[keywords::empty_marker | default_params::empty_marker()],
+             args[keywords::depth | static_cast< attributes::named_scope::value_type::size_type >(0)],
+             dir
+         )
+    }};
+    return actor_type(act);
+}
+
+} // namespace aux
+
+/*!
+ * The function generates a manipulator node in a template expression. The manipulator must participate in a formatting
+ * expression (stream output or \c format placeholder filler).
+ *
+ * \param name Attribute name
+ * \param element_format Format string for a single named scope
+ */
+template< typename CharT >
+BOOST_FORCEINLINE format_named_scope_actor< fallback_to_none, CharT > format_named_scope(attribute_name const& name, const CharT* element_format)
+{
+    typedef format_named_scope_actor< fallback_to_none, CharT > actor_type;
+    typedef typename actor_type::terminal_type terminal_type;
+    typename actor_type::base_type act = {{ terminal_type(name, fallback_to_none(), element_format) }};
+    return actor_type(act);
+}
+
+/*!
+ * The function generates a manipulator node in a template expression. The manipulator must participate in a formatting
+ * expression (stream output or \c format placeholder filler).
+ *
+ * \param name Attribute name
+ * \param element_format Format string for a single named scope
+ */
+template< typename CharT >
+BOOST_FORCEINLINE format_named_scope_actor< fallback_to_none, CharT > format_named_scope(attribute_name const& name, std::basic_string< CharT > const& element_format)
+{
+    typedef format_named_scope_actor< fallback_to_none, CharT > actor_type;
+    typedef typename actor_type::terminal_type terminal_type;
+    typename actor_type::base_type act = {{ terminal_type(name, fallback_to_none(), element_format) }};
+    return actor_type(act);
+}
+
+/*!
+ * The function generates a manipulator node in a template expression. The manipulator must participate in a formatting
+ * expression (stream output or \c format placeholder filler).
+ *
+ * \param keyword Attribute keyword
+ * \param element_format Format string for a single named scope
+ */
+template< typename DescriptorT, template< typename > class ActorT, typename CharT >
+BOOST_FORCEINLINE format_named_scope_actor< fallback_to_none, CharT, ActorT >
+format_named_scope(attribute_keyword< DescriptorT, ActorT > const& keyword, const CharT* element_format)
+{
+    BOOST_STATIC_ASSERT_MSG((is_same< typename DescriptorT::value_type, attributes::named_scope::value_type >::value),\
+        "Boost.Log: Named scope formatter only accepts attribute values of type attributes::named_scope::value_type.");
+
+    typedef format_named_scope_actor< fallback_to_none, CharT, ActorT > actor_type;
+    typedef typename actor_type::terminal_type terminal_type;
+    typename actor_type::base_type act = {{ terminal_type(keyword.get_name(), fallback_to_none(), element_format) }};
+    return actor_type(act);
+}
+
+/*!
+ * The function generates a manipulator node in a template expression. The manipulator must participate in a formatting
+ * expression (stream output or \c format placeholder filler).
+ *
+ * \param keyword Attribute keyword
+ * \param element_format Format string for a single named scope
+ */
+template< typename DescriptorT, template< typename > class ActorT, typename CharT >
+BOOST_FORCEINLINE format_named_scope_actor< fallback_to_none, CharT, ActorT >
+format_named_scope(attribute_keyword< DescriptorT, ActorT > const& keyword, std::basic_string< CharT > const& element_format)
+{
+    BOOST_STATIC_ASSERT_MSG((is_same< typename DescriptorT::value_type, attributes::named_scope::value_type >::value),\
+        "Boost.Log: Named scope formatter only accepts attribute values of type attributes::named_scope::value_type.");
+
+    typedef format_named_scope_actor< fallback_to_none, CharT, ActorT > actor_type;
+    typedef typename actor_type::terminal_type terminal_type;
+    typename actor_type::base_type act = {{ terminal_type(keyword.get_name(), fallback_to_none(), element_format) }};
+    return actor_type(act);
+}
+
+/*!
+ * The function generates a manipulator node in a template expression. The manipulator must participate in a formatting
+ * expression (stream output or \c format placeholder filler).
+ *
+ * \param placeholder Attribute placeholder
+ * \param element_format Format string for a single named scope
+ */
+template< typename T, typename FallbackPolicyT, typename TagT, template< typename > class ActorT, typename CharT >
+BOOST_FORCEINLINE format_named_scope_actor< FallbackPolicyT, CharT, ActorT >
+format_named_scope(attribute_actor< T, FallbackPolicyT, TagT, ActorT > const& placeholder, const CharT* element_format)
+{
+    BOOST_STATIC_ASSERT_MSG((is_same< T, attributes::named_scope::value_type >::value),\
+        "Boost.Log: Named scope formatter only accepts attribute values of type attributes::named_scope::value_type.");
+
+    typedef format_named_scope_actor< FallbackPolicyT, CharT, ActorT > actor_type;
+    typedef typename actor_type::terminal_type terminal_type;
+    typename actor_type::base_type act = {{ terminal_type(placeholder.get_name(), placeholder.get_fallback_policy(), element_format) }};
+    return actor_type(act);
+}
+
+/*!
+ * The function generates a manipulator node in a template expression. The manipulator must participate in a formatting
+ * expression (stream output or \c format placeholder filler).
+ *
+ * \param placeholder Attribute placeholder
+ * \param element_format Format string for a single named scope
+ */
+template< typename T, typename FallbackPolicyT, typename TagT, template< typename > class ActorT, typename CharT >
+BOOST_FORCEINLINE format_named_scope_actor< FallbackPolicyT, CharT, ActorT >
+format_named_scope(attribute_actor< T, FallbackPolicyT, TagT, ActorT > const& placeholder, std::basic_string< CharT > const& element_format)
+{
+    BOOST_STATIC_ASSERT_MSG((is_same< T, attributes::named_scope::value_type >::value),\
+        "Boost.Log: Named scope formatter only accepts attribute values of type attributes::named_scope::value_type.");
+
+    typedef format_named_scope_actor< FallbackPolicyT, CharT, ActorT > actor_type;
+    typedef typename actor_type::terminal_type terminal_type;
+    typename actor_type::base_type act = {{ terminal_type(placeholder.get_name(), placeholder.get_fallback_policy(), element_format) }};
+    return actor_type(act);
+}
+
+#if !defined(BOOST_LOG_DOXYGEN_PASS)
+
+#   define BOOST_PP_FILENAME_1 <boost/log/detail/named_scope_fmt_pp.hpp>
+#   define BOOST_PP_ITERATION_LIMITS (1, 6)
+#   include BOOST_PP_ITERATE()
+
+#else // BOOST_LOG_DOXYGEN_PASS
+
+/*!
+ * Formatter generator. Construct the named scope formatter with the specified formatting parameters.
+ *
+ * \param name Attribute name
+ * \param args An set of named parameters. Supported parameters:
+ *             \li \c format - A format string for named scopes. The string can contain "%n", "%f" and "%l" placeholders for the scope name, file and line number, respectively. This parameter is mandatory.
+ *             \li \c delimiter - A string that is used to delimit the formatted scope names. Default: "->" or "<-", depending on the iteration direction.
+ *             \li \c incomplete_marker - A string that is used to indicate that the list was printed incomplete because of depth limitation. Default: "...".
+ *             \li \c empty_marker - A string that is output in case if the scope list is empty. Default: "", i.e. nothing is output.
+ *             \li \c iteration - Iteration direction, see \c scope_iteration_direction enumeration. Default: forward.
+ *             \li \c depth - Iteration depth. Default: unlimited.
+ */
+template< typename... ArgsT >
+unspecified format_named_scope(attribute_name const& name, ArgsT... const& args);
+
+/*! \overload */
+template< typename DescriptorT, template< typename > class ActorT, typename... ArgsT >
+unspecified format_named_scope(attribute_keyword< DescriptorT, ActorT > const& keyword, ArgsT... const& args);
+
+/*! \overload */
+template< typename T, typename FallbackPolicyT, typename TagT, template< typename > class ActorT, typename... ArgsT >
+unspecified format_named_scope(attribute_actor< T, FallbackPolicyT, TagT, ActorT > const& placeholder, ArgsT... const& args);
+
+#endif // BOOST_LOG_DOXYGEN_PASS
+
+} // namespace expressions
+
+BOOST_LOG_CLOSE_NAMESPACE // namespace log
+
+#ifndef BOOST_LOG_DOXYGEN_PASS
+
+namespace phoenix {
+
+namespace result_of {
+
+template< typename FallbackPolicyT, typename CharT >
+struct is_nullary< custom_terminal< boost::log::expressions::format_named_scope_terminal< FallbackPolicyT, CharT > > > :
+    public mpl::false_
+{
+};
+
+} // namespace result_of
+
+} // namespace phoenix
+
+#endif
+
+} // namespace boost
+
+#include <boost/log/detail/footer.hpp>
+
+#endif // BOOST_LOG_EXPRESSIONS_FORMATTERS_NAMED_SCOPE_HPP_INCLUDED_