1/*
2 * Copyright Andrey Semashev 2007 - 2015.
3 * Distributed under the Boost Software License, Version 1.0.
4 * (See accompanying file LICENSE_1_0.txt or copy at
5 * http://www.boost.org/LICENSE_1_0.txt)
6 */
7/*!
8 * \file attribute_output_terminal.hpp
9 * \author Andrey Semashev
10 * \date 06.11.2012
11 *
12 * The header contains implementation of a generic output manipulator in template expressions.
13 */
14
15#ifndef BOOST_LOG_DETAIL_ATTR_OUTPUT_TERMINAL_HPP_INCLUDED_
16#define BOOST_LOG_DETAIL_ATTR_OUTPUT_TERMINAL_HPP_INCLUDED_
17
18#include <boost/mpl/bool.hpp>
19#include <boost/phoenix/core/actor.hpp>
20#include <boost/phoenix/core/meta_grammar.hpp>
21#include <boost/phoenix/core/environment.hpp>
22#include <boost/phoenix/core/terminal_fwd.hpp>
23#include <boost/phoenix/core/is_nullary.hpp>
24#include <boost/type_traits/remove_cv.hpp>
25#include <boost/type_traits/remove_reference.hpp>
26#include <boost/fusion/sequence/intrinsic/at.hpp>
27#include <boost/log/detail/config.hpp>
28#include <boost/log/detail/custom_terminal_spec.hpp>
29#include <boost/log/attributes/attribute_name.hpp>
30#include <boost/log/attributes/value_visitation.hpp>
31#include <boost/log/utility/functional/bind.hpp>
32#include <boost/log/detail/header.hpp>
33
34#ifdef BOOST_HAS_PRAGMA_ONCE
35#pragma once
36#endif
37
38namespace boost {
39
40BOOST_LOG_OPEN_NAMESPACE
41
42namespace expressions {
43
44namespace aux {
45
46//! Attribute stream output expression
47template< typename LeftT, typename T, typename FallbackPolicyT, typename ImplT >
48class attribute_output_terminal
49{
50private:
51 //! Self type
52 typedef attribute_output_terminal< LeftT, T, FallbackPolicyT, ImplT > this_type;
53 //! Attribute value visitor invoker
54 typedef value_visitor_invoker< T, FallbackPolicyT > visitor_invoker_type;
55 //! Manipulator implementation
56 typedef ImplT impl_type;
57
58public:
59 //! Internal typedef for type categorization
60 typedef void _is_boost_log_terminal;
61
62 //! Result type definition
63 template< typename >
64 struct result;
65
66 template< typename ThisT, typename ContextT >
67 struct result< ThisT(ContextT) >
68 {
69 typedef typename remove_cv< typename remove_reference< ContextT >::type >::type context_type;
70 typedef typename phoenix::evaluator::impl<
71 typename LeftT::proto_base_expr&,
72 context_type,
73 phoenix::unused
74 >::result_type type;
75 };
76
77private:
78 //! Left argument actor
79 LeftT m_left;
80 //! Attribute name
81 const attribute_name m_name;
82 //! Attribute value visitor invoker
83 visitor_invoker_type m_visitor_invoker;
84 //! Manipulator implementation
85 impl_type m_impl;
86
87public:
88 //! Initializing constructor
89 attribute_output_terminal(LeftT const& left, attribute_name const& name) : m_left(left), m_name(name)
90 {
91 }
92
93 //! Initializing constructor
94 attribute_output_terminal(LeftT const& left, attribute_name const& name, impl_type const& impl) : m_left(left), m_name(name), m_impl(impl)
95 {
96 }
97
98 //! Initializing constructor
99 template< typename U >
100 attribute_output_terminal(LeftT const& left, attribute_name const& name, impl_type const& impl, U const& arg) :
101 m_left(left), m_name(name), m_visitor_invoker(arg), m_impl(impl)
102 {
103 }
104
105 //! Copy constructor
106 attribute_output_terminal(attribute_output_terminal const& that) :
107 m_left(that.m_left), m_name(that.m_name), m_visitor_invoker(that.m_visitor_invoker), m_impl(that.m_impl)
108 {
109 }
110
111 //! Invokation operator
112 template< typename ContextT >
113 typename result< this_type(ContextT const&) >::type operator() (ContextT const& ctx)
114 {
115 typedef typename result< this_type(ContextT const&) >::type result_type;
116 result_type strm = phoenix::eval(m_left, ctx);
117 m_visitor_invoker(m_name, fusion::at_c< 0 >(phoenix::env(ctx).args()), binder1st< impl_type&, result_type >(m_impl, strm));
118 return strm;
119 }
120
121 //! Invokation operator
122 template< typename ContextT >
123 typename result< const this_type(ContextT const&) >::type operator() (ContextT const& ctx) const
124 {
125 typedef typename result< const this_type(ContextT const&) >::type result_type;
126 result_type strm = phoenix::eval(m_left, ctx);
127 m_visitor_invoker(m_name, fusion::at_c< 0 >(phoenix::env(ctx).args()), binder1st< impl_type const&, result_type >(m_impl, strm));
128 return strm;
129 }
130
131 BOOST_DELETED_FUNCTION(attribute_output_terminal())
132};
133
134} // namespace aux
135
136} // namespace expressions
137
138BOOST_LOG_CLOSE_NAMESPACE // namespace log
139
140#ifndef BOOST_LOG_DOXYGEN_PASS
141
142namespace phoenix {
143
144namespace result_of {
145
146template< typename LeftT, typename T, typename FallbackPolicyT, typename ImplT >
147struct is_nullary< custom_terminal< boost::log::expressions::aux::attribute_output_terminal< LeftT, T, FallbackPolicyT, ImplT > > > :
148 public mpl::false_
149{
150};
151
152} // namespace result_of
153
154} // namespace phoenix
155
156#endif // !defined(BOOST_LOG_DOXYGEN_PASS)
157
158} // namespace boost
159
160#include <boost/log/detail/footer.hpp>
161
162#endif // BOOST_LOG_DETAIL_ATTR_OUTPUT_TERMINAL_HPP_INCLUDED_
163

source code of boost/libs/log/include/boost/log/detail/attr_output_terminal.hpp