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   attribute_output_terminal.hpp
Chris@16:  * \author Andrey Semashev
Chris@16:  * \date   06.11.2012
Chris@16:  *
Chris@16:  * The header contains implementation of a generic output manipulator in template expressions.
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_LOG_DETAIL_ATTR_OUTPUT_TERMINAL_HPP_INCLUDED_
Chris@16: #define BOOST_LOG_DETAIL_ATTR_OUTPUT_TERMINAL_HPP_INCLUDED_
Chris@16: 
Chris@16: #include <boost/mpl/bool.hpp>
Chris@16: #include <boost/phoenix/core/actor.hpp>
Chris@16: #include <boost/phoenix/core/meta_grammar.hpp>
Chris@16: #include <boost/phoenix/core/environment.hpp>
Chris@16: #include <boost/phoenix/core/terminal_fwd.hpp>
Chris@16: #include <boost/phoenix/core/is_nullary.hpp>
Chris@16: #include <boost/type_traits/remove_cv.hpp>
Chris@16: #include <boost/type_traits/remove_reference.hpp>
Chris@16: #include <boost/fusion/sequence/intrinsic/at.hpp>
Chris@16: #include <boost/log/detail/config.hpp>
Chris@16: #include <boost/log/detail/custom_terminal_spec.hpp>
Chris@16: #include <boost/log/attributes/attribute_name.hpp>
Chris@16: #include <boost/log/attributes/value_visitation.hpp>
Chris@16: #include <boost/log/utility/functional/bind.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: //! Attribute stream output expression
Chris@16: template< typename LeftT, typename T, typename FallbackPolicyT, typename ImplT >
Chris@16: class attribute_output_terminal
Chris@16: {
Chris@16: private:
Chris@16:     //! Self type
Chris@16:     typedef attribute_output_terminal< LeftT, T, FallbackPolicyT, ImplT > this_type;
Chris@16:     //! Attribute value visitor invoker
Chris@16:     typedef value_visitor_invoker< T, FallbackPolicyT > visitor_invoker_type;
Chris@16:     //! Manipulator implementation
Chris@16:     typedef ImplT impl_type;
Chris@16: 
Chris@16: public:
Chris@16:     //! Internal typedef for type categorization
Chris@16:     typedef void _is_boost_log_terminal;
Chris@16: 
Chris@16:     //! Result type definition
Chris@16:     template< typename >
Chris@16:     struct result;
Chris@16: 
Chris@101:     template< typename ThisT, typename ContextT >
Chris@101:     struct result< ThisT(ContextT) >
Chris@16:     {
Chris@16:         typedef typename remove_cv< typename remove_reference< ContextT >::type >::type context_type;
Chris@16:         typedef typename phoenix::evaluator::impl<
Chris@16:             typename LeftT::proto_base_expr&,
Chris@16:             context_type,
Chris@16:             phoenix::unused
Chris@16:         >::result_type type;
Chris@16:     };
Chris@16: 
Chris@16: private:
Chris@16:     //! Left argument actor
Chris@16:     LeftT m_left;
Chris@16:     //! Attribute name
Chris@16:     const attribute_name m_name;
Chris@16:     //! Attribute value visitor invoker
Chris@16:     visitor_invoker_type m_visitor_invoker;
Chris@16:     //! Manipulator implementation
Chris@16:     impl_type m_impl;
Chris@16: 
Chris@16: public:
Chris@16:     //! Initializing constructor
Chris@16:     attribute_output_terminal(LeftT const& left, attribute_name const& name) : m_left(left), m_name(name)
Chris@16:     {
Chris@16:     }
Chris@16: 
Chris@16:     //! Initializing constructor
Chris@16:     attribute_output_terminal(LeftT const& left, attribute_name const& name, impl_type const& impl) : m_left(left), m_name(name), m_impl(impl)
Chris@16:     {
Chris@16:     }
Chris@16: 
Chris@16:     //! Initializing constructor
Chris@16:     template< typename U >
Chris@16:     attribute_output_terminal(LeftT const& left, attribute_name const& name, impl_type const& impl, U const& arg) :
Chris@16:         m_left(left), m_name(name), m_visitor_invoker(arg), m_impl(impl)
Chris@16:     {
Chris@16:     }
Chris@16: 
Chris@16:     //! Copy constructor
Chris@16:     attribute_output_terminal(attribute_output_terminal const& that) :
Chris@16:         m_left(that.m_left), m_name(that.m_name), m_visitor_invoker(that.m_visitor_invoker), m_impl(that.m_impl)
Chris@16:     {
Chris@16:     }
Chris@16: 
Chris@16:     //! Invokation operator
Chris@16:     template< typename ContextT >
Chris@16:     typename result< this_type(ContextT const&) >::type operator() (ContextT const& ctx)
Chris@16:     {
Chris@16:         typedef typename result< this_type(ContextT const&) >::type result_type;
Chris@16:         result_type strm = phoenix::eval(m_left, ctx);
Chris@16:         m_visitor_invoker(m_name, fusion::at_c< 0 >(phoenix::env(ctx).args()), binder1st< impl_type&, result_type >(m_impl, strm));
Chris@16:         return strm;
Chris@16:     }
Chris@16: 
Chris@16:     //! Invokation operator
Chris@16:     template< typename ContextT >
Chris@16:     typename result< const this_type(ContextT const&) >::type operator() (ContextT const& ctx) const
Chris@16:     {
Chris@16:         typedef typename result< const this_type(ContextT const&) >::type result_type;
Chris@16:         result_type strm = phoenix::eval(m_left, ctx);
Chris@16:         m_visitor_invoker(m_name, fusion::at_c< 0 >(phoenix::env(ctx).args()), binder1st< impl_type const&, result_type >(m_impl, strm));
Chris@16:         return strm;
Chris@16:     }
Chris@16: 
Chris@16:     BOOST_DELETED_FUNCTION(attribute_output_terminal())
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: #ifndef BOOST_LOG_DOXYGEN_PASS
Chris@16: 
Chris@16: namespace phoenix {
Chris@16: 
Chris@16: namespace result_of {
Chris@16: 
Chris@16: template< typename LeftT, typename T, typename FallbackPolicyT, typename ImplT >
Chris@16: struct is_nullary< custom_terminal< boost::log::expressions::aux::attribute_output_terminal< LeftT, T, FallbackPolicyT, ImplT > > > :
Chris@16:     public mpl::false_
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: } // namespace result_of
Chris@16: 
Chris@16: } // namespace phoenix
Chris@16: 
Chris@16: #endif // !defined(BOOST_LOG_DOXYGEN_PASS)
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #include <boost/log/detail/footer.hpp>
Chris@16: 
Chris@16: #endif // BOOST_LOG_DETAIL_ATTR_OUTPUT_TERMINAL_HPP_INCLUDED_