Chris@16: /*
Chris@101:  *          Copyright Andrey Semashev 2007 - 2015.
Chris@16:  * Distributed under the Boost Software License, Version 1.0.
Chris@16:  *    (See accompanying file LICENSE_1_0.txt or copy at
Chris@16:  *          http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  */
Chris@16: /*!
Chris@16:  * \file   support/date_time.hpp
Chris@16:  * \author Andrey Semashev
Chris@16:  * \date   07.11.2012
Chris@16:  *
Chris@16:  * This header enables Boost.DateTime support for Boost.Log.
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_LOG_SUPPORT_DATE_TIME_HPP_INCLUDED_
Chris@16: #define BOOST_LOG_SUPPORT_DATE_TIME_HPP_INCLUDED_
Chris@16: 
Chris@16: #include <ctime>
Chris@16: #include <string>
Chris@16: #include <locale>
Chris@16: #include <ostream>
Chris@16: #include <iterator>
Chris@16: #include <boost/cstdint.hpp>
Chris@16: #include <boost/move/core.hpp>
Chris@16: #include <boost/move/utility.hpp>
Chris@16: #include <boost/date_time/time.hpp>
Chris@16: #include <boost/date_time/date.hpp>
Chris@16: #include <boost/date_time/gregorian/gregorian_types.hpp>
Chris@16: #include <boost/date_time/local_time/local_time_types.hpp>
Chris@16: #include <boost/date_time/posix_time/posix_time_types.hpp>
Chris@16: #include <boost/log/detail/config.hpp>
Chris@16: #include <boost/log/detail/date_time_format_parser.hpp>
Chris@16: #include <boost/log/detail/light_function.hpp>
Chris@16: #include <boost/log/detail/decomposed_time.hpp>
Chris@16: #include <boost/log/detail/date_time_fmt_gen_traits_fwd.hpp>
Chris@16: #include <boost/log/utility/formatting_ostream.hpp>
Chris@16: #include <boost/log/detail/header.hpp>
Chris@16: 
Chris@16: #ifdef BOOST_HAS_PRAGMA_ONCE
Chris@16: #pragma once
Chris@16: #endif
Chris@16: 
Chris@16: namespace boost {
Chris@16: 
Chris@16: BOOST_LOG_OPEN_NAMESPACE
Chris@16: 
Chris@16: namespace expressions {
Chris@16: 
Chris@16: namespace aux {
Chris@16: 
Chris@16: namespace date_time_support {
Chris@16: 
Chris@16: template< typename DateT, typename ValueT >
Chris@16: inline void decompose_date(DateT const& d, boost::log::aux::decomposed_time_wrapper< ValueT >& v)
Chris@16: {
Chris@16:     typedef typename DateT::ymd_type ymd_type;
Chris@16:     ymd_type ymd = d.year_month_day();
Chris@16:     v.year = ymd.year;
Chris@16:     v.month = ymd.month;
Chris@16:     v.day = ymd.day;
Chris@16: }
Chris@16: 
Chris@16: template< typename TimeDurationT, typename ValueT >
Chris@16: inline void decompose_time_of_day(TimeDurationT const& tod, boost::log::aux::decomposed_time_wrapper< ValueT >& v)
Chris@16: {
Chris@16:     v.hours = tod.hours();
Chris@16:     v.minutes = tod.minutes();
Chris@16:     v.seconds = tod.seconds();
Chris@16: 
Chris@16:     typedef typename TimeDurationT::traits_type traits_type;
Chris@16:     enum
Chris@16:     {
Chris@16:         adjustment_ratio = (traits_type::ticks_per_second > boost::log::aux::decomposed_time::subseconds_per_second ?
Chris@16:             traits_type::ticks_per_second / boost::log::aux::decomposed_time::subseconds_per_second :
Chris@16:             boost::log::aux::decomposed_time::subseconds_per_second / traits_type::ticks_per_second)
Chris@16:     };
Chris@16:     uint64_t frac = tod.fractional_seconds();
Chris@16:     v.subseconds = static_cast< uint32_t >(traits_type::ticks_per_second > boost::log::aux::decomposed_time::subseconds_per_second ? frac / adjustment_ratio : frac * adjustment_ratio);
Chris@16: }
Chris@16: 
Chris@16: template< typename TimeDurationT, typename ValueT >
Chris@16: inline void decompose_time_duration(TimeDurationT const& dur, boost::log::aux::decomposed_time_wrapper< ValueT >& v)
Chris@16: {
Chris@16:     if (dur.is_negative())
Chris@16:     {
Chris@16:         v.negative = true;
Chris@16:         (decompose_time_of_day)(-dur, v);
Chris@16:     }
Chris@16:     else
Chris@16:         (decompose_time_of_day)(dur, v);
Chris@16: }
Chris@16: 
Chris@16: template< typename DateDurationT, typename ValueT >
Chris@16: inline void decompose_date_duration(DateDurationT const& dur, boost::log::aux::decomposed_time_wrapper< ValueT >& v)
Chris@16: {
Chris@16:     if (dur.is_negative())
Chris@16:     {
Chris@16:         v.negative = true;
Chris@16:         v.day = (-dur).days();
Chris@16:     }
Chris@16:     else
Chris@16:         v.day = dur.days();
Chris@16: }
Chris@16: 
Chris@16: template< typename TimeT, typename ValueT >
Chris@16: inline void decompose_time(TimeT const& t, boost::log::aux::decomposed_time_wrapper< ValueT >& v)
Chris@16: {
Chris@16:     (decompose_date)(t.date(), v);
Chris@16:     (decompose_time_of_day)(t.time_of_day(), v);
Chris@16: }
Chris@16: 
Chris@16: } // namespace date_time_support
Chris@16: 
Chris@16: template< typename TimeT, typename CharT >
Chris@16: struct date_time_formatter_generator_traits_impl
Chris@16: {
Chris@16:     //! Character type
Chris@16:     typedef CharT char_type;
Chris@16:     //! String type
Chris@16:     typedef std::basic_string< char_type > string_type;
Chris@16:     //! Formatting stream type
Chris@16:     typedef basic_formatting_ostream< char_type > stream_type;
Chris@16:     //! Value type
Chris@16:     typedef TimeT value_type;
Chris@16: 
Chris@16:     //! Formatter function
Chris@16:     typedef boost::log::aux::light_function< void (stream_type&, value_type const&) > formatter_function_type;
Chris@16: 
Chris@16:     //! Formatter implementation
Chris@16:     class formatter :
Chris@16:         public boost::log::aux::date_time_formatter< boost::log::aux::decomposed_time_wrapper< value_type >, char_type >
Chris@16:     {
Chris@16:         BOOST_COPYABLE_AND_MOVABLE_ALT(formatter)
Chris@16: 
Chris@16:     private:
Chris@16:         // Do not change this typedef, copy-pasting the inherited class from above will break compilation with MSVC 2012 because it incorrectly binds value_type.
Chris@16:         typedef typename formatter::date_time_formatter_ base_type;
Chris@16: 
Chris@16:     public:
Chris@16:         typedef typename base_type::result_type result_type;
Chris@16:         // This typedef is needed to work around MSVC 2012 crappy name lookup. Otherwise base_type::value_type is bound instead.
Chris@16:         typedef typename date_time_formatter_generator_traits_impl< TimeT, CharT >::value_type value_type;
Chris@16: 
Chris@16:     public:
Chris@16:         BOOST_DEFAULTED_FUNCTION(formatter(), {})
Chris@16:         formatter(formatter const& that) : base_type(static_cast< base_type const& >(that)) {}
Chris@16:         formatter(BOOST_RV_REF(formatter) that) { this->swap(that); }
Chris@16: 
Chris@16:         formatter& operator= (formatter that)
Chris@16:         {
Chris@16:             this->swap(that);
Chris@16:             return *this;
Chris@16:         }
Chris@16: 
Chris@16:         result_type operator() (stream_type& strm, value_type const& value) const
Chris@16:         {
Chris@16:             if (value.is_not_a_date_time())
Chris@16:                 strm << "not-a-date-time";
Chris@16:             else if (value.is_pos_infinity())
Chris@16:                 strm << "+infinity";
Chris@16:             else if (value.is_neg_infinity())
Chris@16:                 strm << "-infinity";
Chris@16:             else
Chris@16:             {
Chris@16:                 boost::log::aux::decomposed_time_wrapper< value_type > val(value);
Chris@16:                 date_time_support::decompose_time(value, val);
Chris@16:                 base_type::operator() (strm, val);
Chris@16:             }
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16:     //! The function parses format string and constructs formatter function
Chris@16:     static formatter_function_type parse(string_type const& format)
Chris@16:     {
Chris@16:         formatter fmt;
Chris@16:         boost::log::aux::decomposed_time_formatter_builder< formatter, char_type > builder(fmt);
Chris@16:         boost::log::aux::parse_date_time_format(format, builder);
Chris@16:         return formatter_function_type(boost::move(fmt));
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: template< typename CharT, typename VoidT >
Chris@16: struct date_time_formatter_generator_traits< posix_time::ptime, CharT, VoidT > :
Chris@16:     public date_time_formatter_generator_traits_impl< posix_time::ptime, CharT >
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: template< typename TimeT, typename TimeZoneT, typename CharT, typename VoidT >
Chris@16: struct date_time_formatter_generator_traits< local_time::local_date_time_base< TimeT, TimeZoneT >, CharT, VoidT >
Chris@16: {
Chris@16:     //! Character type
Chris@16:     typedef CharT char_type;
Chris@16:     //! String type
Chris@16:     typedef std::basic_string< char_type > string_type;
Chris@16:     //! Formatting stream type
Chris@16:     typedef basic_formatting_ostream< char_type > stream_type;
Chris@16:     //! Value type
Chris@16:     typedef local_time::local_date_time_base< TimeT, TimeZoneT > value_type;
Chris@16: 
Chris@16:     //! Formatter function
Chris@16:     typedef boost::log::aux::light_function< void (stream_type&, value_type const&) > formatter_function_type;
Chris@16: 
Chris@16:     //! Formatter implementation
Chris@16:     class formatter :
Chris@16:         public boost::log::aux::date_time_formatter< boost::log::aux::decomposed_time_wrapper< value_type >, char_type >
Chris@16:     {
Chris@16:         BOOST_COPYABLE_AND_MOVABLE_ALT(formatter)
Chris@16: 
Chris@16:     private:
Chris@16:         // Do not change this typedef, copy-pasting the inherited class from above will break compilation with MSVC 2012 because it incorrectly binds value_type.
Chris@16:         typedef typename formatter::date_time_formatter_ base_type;
Chris@16: 
Chris@16:     public:
Chris@16:         typedef typename base_type::result_type result_type;
Chris@16:         typedef typename base_type::context context;
Chris@16:         // This typedef is needed to work around MSVC 2012 crappy name lookup. Otherwise base_type::value_type is bound instead.
Chris@16:         typedef typename date_time_formatter_generator_traits< local_time::local_date_time_base< TimeT, TimeZoneT >, CharT, VoidT >::value_type value_type;
Chris@16: 
Chris@16:     public:
Chris@16:         BOOST_DEFAULTED_FUNCTION(formatter(), {})
Chris@16:         formatter(formatter const& that) : base_type(static_cast< base_type const& >(that)) {}
Chris@16:         formatter(BOOST_RV_REF(formatter) that) { this->swap(that); }
Chris@16: 
Chris@16:         formatter& operator= (formatter that)
Chris@16:         {
Chris@16:             this->swap(that);
Chris@16:             return *this;
Chris@16:         }
Chris@16: 
Chris@16:         result_type operator() (stream_type& strm, value_type const& value) const
Chris@16:         {
Chris@16:             if (value.is_not_a_date_time())
Chris@16:                 strm << "not-a-date-time";
Chris@16:             else if (value.is_pos_infinity())
Chris@16:                 strm << "+infinity";
Chris@16:             else if (value.is_neg_infinity())
Chris@16:                 strm << "-infinity";
Chris@16:             else
Chris@16:             {
Chris@16:                 boost::log::aux::decomposed_time_wrapper< value_type > val(value);
Chris@16:                 date_time_support::decompose_time(value.local_time(), val);
Chris@16:                 base_type::operator() (strm, val);
Chris@16:             }
Chris@16:         }
Chris@16: 
Chris@16:     public:
Chris@16:         static void format_iso_time_zone(context& ctx)
Chris@16:         {
Chris@16:             ctx.strm << ctx.value.m_time.zone_abbrev(true);
Chris@16:             ctx.strm.flush();
Chris@16:         }
Chris@16: 
Chris@16:         static void format_extended_iso_time_zone(context& ctx)
Chris@16:         {
Chris@16:             ctx.strm << ctx.value.m_time.zone_name(true);
Chris@16:             ctx.strm.flush();
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16:     class formatter_builder :
Chris@16:         public boost::log::aux::decomposed_time_formatter_builder< formatter, char_type >
Chris@16:     {
Chris@16:     private:
Chris@16:         typedef boost::log::aux::decomposed_time_formatter_builder< formatter, char_type > base_type;
Chris@16: 
Chris@16:     public:
Chris@16:         explicit formatter_builder(formatter& fmt) : base_type(fmt)
Chris@16:         {
Chris@16:         }
Chris@16: 
Chris@16:         void on_iso_time_zone()
Chris@16:         {
Chris@16:             this->m_formatter.add_formatter(&formatter::format_iso_time_zone);
Chris@16:         }
Chris@16: 
Chris@16:         void on_extended_iso_time_zone()
Chris@16:         {
Chris@16:             this->m_formatter.add_formatter(&formatter::format_extended_iso_time_zone);
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16:     //! The function parses format string and constructs formatter function
Chris@16:     static formatter_function_type parse(string_type const& format)
Chris@16:     {
Chris@16:         formatter fmt;
Chris@16:         formatter_builder builder(fmt);
Chris@16:         boost::log::aux::parse_date_time_format(format, builder);
Chris@16:         return formatter_function_type(boost::move(fmt));
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: template< typename DateT, typename CharT >
Chris@16: struct date_formatter_generator_traits_impl
Chris@16: {
Chris@16:     //! Character type
Chris@16:     typedef CharT char_type;
Chris@16:     //! String type
Chris@16:     typedef std::basic_string< char_type > string_type;
Chris@16:     //! Formatting stream type
Chris@16:     typedef basic_formatting_ostream< char_type > stream_type;
Chris@16:     //! Value type
Chris@16:     typedef DateT value_type;
Chris@16: 
Chris@16:     //! Formatter function
Chris@16:     typedef boost::log::aux::light_function< void (stream_type&, value_type const&) > formatter_function_type;
Chris@16: 
Chris@16:     //! Formatter implementation
Chris@16:     class formatter :
Chris@16:         public boost::log::aux::date_time_formatter< boost::log::aux::decomposed_time_wrapper< value_type >, char_type >
Chris@16:     {
Chris@16:         BOOST_COPYABLE_AND_MOVABLE_ALT(formatter)
Chris@16: 
Chris@16:     private:
Chris@16:         // Do not change this typedef, copy-pasting the inherited class from above will break compilation with MSVC 2012 because it incorrectly binds value_type.
Chris@16:         typedef typename formatter::date_time_formatter_ base_type;
Chris@16: 
Chris@16:     public:
Chris@16:         typedef typename base_type::result_type result_type;
Chris@16:         // This typedef is needed to work around MSVC 2012 crappy name lookup. Otherwise base_type::value_type is bound instead.
Chris@16:         typedef typename date_formatter_generator_traits_impl< DateT, CharT >::value_type value_type;
Chris@16: 
Chris@16:     public:
Chris@16:         BOOST_DEFAULTED_FUNCTION(formatter(), {})
Chris@16:         formatter(formatter const& that) : base_type(static_cast< base_type const& >(that)) {}
Chris@16:         formatter(BOOST_RV_REF(formatter) that) { this->swap(that); }
Chris@16: 
Chris@16:         formatter& operator= (formatter that)
Chris@16:         {
Chris@16:             this->swap(that);
Chris@16:             return *this;
Chris@16:         }
Chris@16: 
Chris@16:         result_type operator() (stream_type& strm, value_type const& value) const
Chris@16:         {
Chris@16:             if (value.is_not_a_date())
Chris@16:                 strm << "not-a-date-time";
Chris@16:             else if (value.is_pos_infinity())
Chris@16:                 strm << "+infinity";
Chris@16:             else if (value.is_neg_infinity())
Chris@16:                 strm << "-infinity";
Chris@16:             else
Chris@16:             {
Chris@16:                 boost::log::aux::decomposed_time_wrapper< value_type > val(value);
Chris@16:                 date_time_support::decompose_date(value, val);
Chris@16:                 base_type::operator() (strm, val);
Chris@16:             }
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16:     //! The function parses format string and constructs formatter function
Chris@16:     static formatter_function_type parse(string_type const& format)
Chris@16:     {
Chris@16:         formatter fmt;
Chris@16:         boost::log::aux::decomposed_time_formatter_builder< formatter, char_type > builder(fmt);
Chris@16:         boost::log::aux::parse_date_format(format, builder);
Chris@16:         return formatter_function_type(boost::move(fmt));
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: template< typename CharT, typename VoidT >
Chris@16: struct date_time_formatter_generator_traits< gregorian::date, CharT, VoidT > :
Chris@16:     public date_formatter_generator_traits_impl< gregorian::date, CharT >
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: template< typename TimeDurationT, typename CharT >
Chris@16: struct time_duration_formatter_generator_traits_impl
Chris@16: {
Chris@16:     //! Character type
Chris@16:     typedef CharT char_type;
Chris@16:     //! String type
Chris@16:     typedef std::basic_string< char_type > string_type;
Chris@16:     //! Formatting stream type
Chris@16:     typedef basic_formatting_ostream< char_type > stream_type;
Chris@16:     //! Value type
Chris@16:     typedef TimeDurationT value_type;
Chris@16: 
Chris@16:     //! Formatter function
Chris@16:     typedef boost::log::aux::light_function< void (stream_type&, value_type const&) > formatter_function_type;
Chris@16: 
Chris@16:     //! Formatter implementation
Chris@16:     class formatter :
Chris@16:         public boost::log::aux::date_time_formatter< boost::log::aux::decomposed_time_wrapper< value_type >, char_type >
Chris@16:     {
Chris@16:         BOOST_COPYABLE_AND_MOVABLE_ALT(formatter)
Chris@16: 
Chris@16:     private:
Chris@16:         // Do not change this typedef, copy-pasting the inherited class from above will break compilation with MSVC 2012 because it incorrectly binds value_type.
Chris@16:         typedef typename formatter::date_time_formatter_ base_type;
Chris@16: 
Chris@16:     public:
Chris@16:         typedef typename base_type::result_type result_type;
Chris@16:         // This typedef is needed to work around MSVC 2012 crappy name lookup. Otherwise base_type::value_type is bound instead.
Chris@16:         typedef typename time_duration_formatter_generator_traits_impl< TimeDurationT, CharT >::value_type value_type;
Chris@16: 
Chris@16:     public:
Chris@16:         BOOST_DEFAULTED_FUNCTION(formatter(), {})
Chris@16:         formatter(formatter const& that) : base_type(static_cast< base_type const& >(that)) {}
Chris@16:         formatter(BOOST_RV_REF(formatter) that) { this->swap(that); }
Chris@16: 
Chris@16:         formatter& operator= (formatter that)
Chris@16:         {
Chris@16:             this->swap(that);
Chris@16:             return *this;
Chris@16:         }
Chris@16: 
Chris@16:         result_type operator() (stream_type& strm, value_type const& value) const
Chris@16:         {
Chris@16:             if (value.is_not_a_date_time())
Chris@16:                 strm << "not-a-date-time";
Chris@16:             else if (value.is_pos_infinity())
Chris@16:                 strm << "+infinity";
Chris@16:             else if (value.is_neg_infinity())
Chris@16:                 strm << "-infinity";
Chris@16:             else
Chris@16:             {
Chris@16:                 boost::log::aux::decomposed_time_wrapper< value_type > val(value);
Chris@16:                 date_time_support::decompose_time_duration(value, val);
Chris@16:                 base_type::operator() (strm, val);
Chris@16:             }
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16:     //! The function parses format string and constructs formatter function
Chris@16:     static formatter_function_type parse(string_type const& format)
Chris@16:     {
Chris@16:         formatter fmt;
Chris@16:         boost::log::aux::decomposed_time_formatter_builder< formatter, char_type > builder(fmt);
Chris@16:         boost::log::aux::parse_time_format(format, builder);
Chris@16:         return formatter_function_type(boost::move(fmt));
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: template< typename CharT, typename VoidT >
Chris@16: struct date_time_formatter_generator_traits< posix_time::time_duration, CharT, VoidT > :
Chris@16:     public time_duration_formatter_generator_traits_impl< posix_time::time_duration, CharT >
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: template< typename CharT, typename VoidT >
Chris@16: struct date_time_formatter_generator_traits< posix_time::hours, CharT, VoidT > :
Chris@16:     public time_duration_formatter_generator_traits_impl< posix_time::hours, CharT >
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: template< typename CharT, typename VoidT >
Chris@16: struct date_time_formatter_generator_traits< posix_time::minutes, CharT, VoidT > :
Chris@16:     public time_duration_formatter_generator_traits_impl< posix_time::minutes, CharT >
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: template< typename CharT, typename VoidT >
Chris@16: struct date_time_formatter_generator_traits< posix_time::seconds, CharT, VoidT > :
Chris@16:     public time_duration_formatter_generator_traits_impl< posix_time::seconds, CharT >
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: template< typename BaseDurationT, uint64_t FracOfSecondV, typename CharT, typename VoidT >
Chris@16: struct date_time_formatter_generator_traits< date_time::subsecond_duration< BaseDurationT, FracOfSecondV >, CharT, VoidT > :
Chris@16:     public time_duration_formatter_generator_traits_impl< date_time::subsecond_duration< BaseDurationT, FracOfSecondV >, CharT >
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: template< typename DateDurationT, typename CharT >
Chris@16: struct date_duration_formatter_generator_traits_impl
Chris@16: {
Chris@16:     //! Character type
Chris@16:     typedef CharT char_type;
Chris@16:     //! String type
Chris@16:     typedef std::basic_string< char_type > string_type;
Chris@16:     //! Formatting stream type
Chris@16:     typedef basic_formatting_ostream< char_type > stream_type;
Chris@16:     //! Value type
Chris@16:     typedef DateDurationT value_type;
Chris@16: 
Chris@16:     //! Formatter function
Chris@16:     typedef boost::log::aux::light_function< void (stream_type&, value_type const&) > formatter_function_type;
Chris@16: 
Chris@16:     //! Formatter implementation
Chris@16:     class formatter :
Chris@16:         public boost::log::aux::date_time_formatter< boost::log::aux::decomposed_time_wrapper< value_type >, char_type >
Chris@16:     {
Chris@16:         BOOST_COPYABLE_AND_MOVABLE_ALT(formatter)
Chris@16: 
Chris@16:     private:
Chris@16:         // Do not change this typedef, copy-pasting the inherited class from above will break compilation with MSVC 2012 because it incorrectly binds value_type.
Chris@16:         typedef typename formatter::date_time_formatter_ base_type;
Chris@16: 
Chris@16:     public:
Chris@16:         typedef typename base_type::result_type result_type;
Chris@16:         // This typedef is needed to work around MSVC 2012 crappy name lookup. Otherwise base_type::value_type is bound instead.
Chris@16:         typedef typename date_duration_formatter_generator_traits_impl< DateDurationT, CharT >::value_type value_type;
Chris@16: 
Chris@16:     public:
Chris@16:         BOOST_DEFAULTED_FUNCTION(formatter(), {})
Chris@16:         formatter(formatter const& that) : base_type(static_cast< base_type const& >(that)) {}
Chris@16:         formatter(BOOST_RV_REF(formatter) that) { this->swap(that); }
Chris@16: 
Chris@16:         formatter& operator= (formatter that)
Chris@16:         {
Chris@16:             this->swap(that);
Chris@16:             return *this;
Chris@16:         }
Chris@16: 
Chris@16:         result_type operator() (stream_type& strm, value_type const& value) const
Chris@16:         {
Chris@16:             if (value.is_not_a_date())
Chris@16:                 strm << "not-a-date-time";
Chris@16:             else if (value.is_pos_infinity())
Chris@16:                 strm << "+infinity";
Chris@16:             else if (value.is_neg_infinity())
Chris@16:                 strm << "-infinity";
Chris@16:             else
Chris@16:             {
Chris@16:                 boost::log::aux::decomposed_time_wrapper< value_type > val(value);
Chris@16:                 date_time_support::decompose_date_duration(value, val);
Chris@16:                 base_type::operator() (strm, val);
Chris@16:             }
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16:     //! The function parses format string and constructs formatter function
Chris@16:     static formatter_function_type parse(string_type const& format)
Chris@16:     {
Chris@16:         formatter fmt;
Chris@16:         boost::log::aux::decomposed_time_formatter_builder< formatter, char_type > builder(fmt);
Chris@16:         boost::log::aux::parse_date_format(format, builder);
Chris@16:         return formatter_function_type(boost::move(fmt));
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: template< typename CharT, typename VoidT >
Chris@16: struct date_time_formatter_generator_traits< gregorian::date_duration, CharT, VoidT > :
Chris@16:     public date_formatter_generator_traits_impl< gregorian::date_duration, CharT >
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: } // namespace aux
Chris@16: 
Chris@16: } // namespace expressions
Chris@16: 
Chris@16: BOOST_LOG_CLOSE_NAMESPACE // namespace log
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #include <boost/log/detail/footer.hpp>
Chris@16: 
Chris@16: #endif // BOOST_LOG_SUPPORT_DATE_TIME_HPP_INCLUDED_