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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 formatters/date_time.hpp
- * \author Andrey Semashev
- * \date 16.09.2012
- *
- * The header contains a formatter function for date and time attribute values.
- */
- #ifndef BOOST_LOG_EXPRESSIONS_FORMATTERS_DATE_TIME_HPP_INCLUDED_
- #define BOOST_LOG_EXPRESSIONS_FORMATTERS_DATE_TIME_HPP_INCLUDED_
- #include <string>
- #include <boost/move/core.hpp>
- #include <boost/move/utility_core.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/value_visitation.hpp>
- #include <boost/log/detail/light_function.hpp>
- #include <boost/log/detail/date_time_fmt_gen_traits_fwd.hpp>
- #include <boost/log/detail/custom_terminal_spec.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/functional/bind.hpp>
- #include <boost/log/detail/header.hpp>
- #ifdef BOOST_HAS_PRAGMA_ONCE
- #pragma once
- #endif
- namespace boost {
- BOOST_LOG_OPEN_NAMESPACE
- namespace expressions {
- /*!
- * Date and time formatter terminal.
- */
- template< typename T, typename FallbackPolicyT, typename CharT >
- class format_date_time_terminal
- {
- public:
- #ifndef BOOST_LOG_DOXYGEN_PASS
- //! Internal typedef for type categorization
- typedef void _is_boost_log_terminal;
- #endif
- //! Attribute value type
- typedef T 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 boost::log::aux::light_function< void (stream_type&, value_type const&) > formatter_function_type;
- //! Function result type
- typedef string_type result_type;
- private:
- //! Formatter generator traits
- typedef aux::date_time_formatter_generator_traits< value_type, char_type > formatter_generator;
- //! Attribute value visitor invoker
- typedef value_visitor_invoker< value_type, fallback_policy > visitor_invoker_type;
- private:
- //! Attribute name
- attribute_name m_name;
- //! Formattr function
- formatter_function_type m_formatter;
- //! Attribute value visitor invoker
- visitor_invoker_type m_visitor_invoker;
- public:
- //! Initializing constructor
- format_date_time_terminal(attribute_name const& name, fallback_policy const& fallback, string_type const& format) :
- m_name(name), m_formatter(formatter_generator::parse(format)), m_visitor_invoker(fallback)
- {
- }
- //! Copy constructor
- format_date_time_terminal(format_date_time_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_LOG_NRVO_RESULT(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_LOG_NRVO_RESULT(str);
- }
- BOOST_DELETED_FUNCTION(format_date_time_terminal())
- };
- /*!
- * Date and time formatter actor.
- */
- template< typename T, typename FallbackPolicyT, typename CharT, template< typename > class ActorT = phoenix::actor >
- class format_date_time_actor :
- public ActorT< format_date_time_terminal< T, FallbackPolicyT, CharT > >
- {
- public:
- //! Attribute value type
- typedef T value_type;
- //! Character type
- typedef CharT char_type;
- //! Fallback policy
- typedef FallbackPolicyT fallback_policy;
- //! Base terminal type
- typedef format_date_time_terminal< value_type, fallback_policy, char_type > terminal_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_date_time_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 T, typename FallbackPolicyT, typename CharT >\
- BOOST_FORCEINLINE phoenix::actor< aux::attribute_output_terminal< phoenix::actor< LeftExprT >, T, FallbackPolicyT, typename format_date_time_actor< T, FallbackPolicyT, CharT >::formatter_function_type > >\
- operator<< (phoenix::actor< LeftExprT > left_ref left, format_date_time_actor< T, FallbackPolicyT, CharT > right_ref right)\
- {\
- typedef aux::attribute_output_terminal< phoenix::actor< LeftExprT >, T, FallbackPolicyT, typename format_date_time_actor< T, 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
- /*!
- * 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 format Format string
- */
- template< typename AttributeValueT, typename CharT >
- BOOST_FORCEINLINE format_date_time_actor< AttributeValueT, fallback_to_none, CharT > format_date_time(attribute_name const& name, const CharT* format)
- {
- typedef format_date_time_actor< AttributeValueT, 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(), 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 format Format string
- */
- template< typename AttributeValueT, typename CharT >
- BOOST_FORCEINLINE format_date_time_actor< AttributeValueT, fallback_to_none, CharT > format_date_time(attribute_name const& name, std::basic_string< CharT > const& format)
- {
- typedef format_date_time_actor< AttributeValueT, 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(), 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 format Format string
- */
- template< typename DescriptorT, template< typename > class ActorT, typename CharT >
- BOOST_FORCEINLINE format_date_time_actor< typename DescriptorT::value_type, fallback_to_none, CharT, ActorT >
- format_date_time(attribute_keyword< DescriptorT, ActorT > const& keyword, const CharT* format)
- {
- typedef format_date_time_actor< typename DescriptorT::value_type, 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(), 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 format Format string
- */
- template< typename DescriptorT, template< typename > class ActorT, typename CharT >
- BOOST_FORCEINLINE format_date_time_actor< typename DescriptorT::value_type, fallback_to_none, CharT, ActorT >
- format_date_time(attribute_keyword< DescriptorT, ActorT > const& keyword, std::basic_string< CharT > const& format)
- {
- typedef format_date_time_actor< typename DescriptorT::value_type, 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(), 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 format Format string
- */
- template< typename T, typename FallbackPolicyT, typename TagT, template< typename > class ActorT, typename CharT >
- BOOST_FORCEINLINE format_date_time_actor< T, FallbackPolicyT, CharT, ActorT >
- format_date_time(attribute_actor< T, FallbackPolicyT, TagT, ActorT > const& placeholder, const CharT* format)
- {
- typedef format_date_time_actor< T, 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(), 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 format Format string
- */
- template< typename T, typename FallbackPolicyT, typename TagT, template< typename > class ActorT, typename CharT >
- BOOST_FORCEINLINE format_date_time_actor< T, FallbackPolicyT, CharT, ActorT >
- format_date_time(attribute_actor< T, FallbackPolicyT, TagT, ActorT > const& placeholder, std::basic_string< CharT > const& format)
- {
- typedef format_date_time_actor< T, 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(), format) }};
- return actor_type(act);
- }
- } // namespace expressions
- BOOST_LOG_CLOSE_NAMESPACE // namespace log
- #ifndef BOOST_LOG_DOXYGEN_PASS
- namespace phoenix {
- namespace result_of {
- template< typename T, typename FallbackPolicyT, typename CharT >
- struct is_nullary< custom_terminal< boost::log::expressions::format_date_time_terminal< T, FallbackPolicyT, CharT > > > :
- public mpl::false_
- {
- };
- } // namespace result_of
- } // namespace phoenix
- #endif // BOOST_LOG_DOXYGEN_PASS
- } // namespace boost
- #include <boost/log/detail/footer.hpp>
- #endif // BOOST_LOG_EXPRESSIONS_FORMATTERS_DATE_TIME_HPP_INCLUDED_
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