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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 formatters/format.hpp | |
9 | * \author Andrey Semashev | |
10 | * \date 15.11.2012 | |
11 | * | |
12 | * The header contains a generic log record formatter function. | |
13 | */ | |
14 | ||
15 | #ifndef BOOST_LOG_EXPRESSIONS_FORMATTERS_FORMAT_HPP_INCLUDED_ | |
16 | #define BOOST_LOG_EXPRESSIONS_FORMATTERS_FORMAT_HPP_INCLUDED_ | |
17 | ||
18 | #include <string> | |
19 | #include <boost/mpl/bool.hpp> | |
20 | #include <boost/phoenix/core/actor.hpp> | |
21 | #include <boost/phoenix/core/terminal_fwd.hpp> | |
22 | #include <boost/phoenix/core/is_nullary.hpp> | |
23 | #include <boost/phoenix/core/environment.hpp> | |
24 | #include <boost/fusion/sequence/intrinsic/at_c.hpp> | |
25 | #include <boost/log/detail/config.hpp> | |
26 | #include <boost/log/detail/format.hpp> | |
27 | #include <boost/log/detail/custom_terminal_spec.hpp> | |
28 | #include <boost/log/detail/header.hpp> | |
29 | ||
30 | #ifdef BOOST_HAS_PRAGMA_ONCE | |
31 | #pragma once | |
32 | #endif | |
33 | ||
34 | namespace boost { | |
35 | ||
36 | BOOST_LOG_OPEN_NAMESPACE | |
37 | ||
38 | namespace expressions { | |
39 | ||
40 | /*! | |
41 | * \brief Template expressions terminal node with Boost.Format-like formatter | |
42 | */ | |
43 | template< typename CharT > | |
44 | class format_terminal | |
45 | { | |
46 | public: | |
47 | #ifndef BOOST_LOG_DOXYGEN_PASS | |
48 | //! Internal typedef for type categorization | |
49 | typedef void _is_boost_log_terminal; | |
50 | #endif | |
51 | ||
52 | //! Character type | |
53 | typedef CharT char_type; | |
54 | //! Boost.Format formatter type | |
55 | typedef boost::log::aux::basic_format< char_type > format_type; | |
56 | //! String type | |
57 | typedef std::basic_string< char_type > string_type; | |
58 | ||
59 | //! Terminal result type | |
60 | typedef typename format_type::pump result_type; | |
61 | ||
62 | private: | |
63 | //! Formatter object | |
64 | mutable format_type m_format; | |
65 | ||
66 | public: | |
67 | //! Initializing constructor | |
68 | explicit format_terminal(const char_type* format) : m_format(format) {} | |
69 | ||
70 | //! Invokation operator | |
71 | template< typename ContextT > | |
72 | result_type operator() (ContextT const& ctx) const | |
73 | { | |
74 | return m_format.make_pump(fusion::at_c< 1 >(phoenix::env(ctx).args())); | |
75 | } | |
76 | ||
77 | BOOST_DELETED_FUNCTION(format_terminal()) | |
78 | }; | |
79 | ||
80 | /*! | |
81 | * The function generates a terminal node in a template expression. The node will perform log record formatting | |
82 | * according to the provided format string. | |
83 | */ | |
84 | template< typename CharT > | |
85 | BOOST_FORCEINLINE phoenix::actor< format_terminal< CharT > > format(const CharT* fmt) | |
86 | { | |
87 | typedef format_terminal< CharT > terminal_type; | |
88 | phoenix::actor< terminal_type > act = {{ terminal_type(fmt) }}; | |
89 | return act; | |
90 | } | |
91 | ||
92 | /*! | |
93 | * The function generates a terminal node in a template expression. The node will perform log record formatting | |
94 | * according to the provided format string. | |
95 | */ | |
96 | template< typename CharT, typename TraitsT, typename AllocatorT > | |
97 | BOOST_FORCEINLINE phoenix::actor< format_terminal< CharT > > format(std::basic_string< CharT, TraitsT, AllocatorT > const& fmt) | |
98 | { | |
99 | typedef format_terminal< CharT > terminal_type; | |
100 | phoenix::actor< terminal_type > act = {{ terminal_type(fmt.c_str()) }}; | |
101 | return act; | |
102 | } | |
103 | ||
104 | } // namespace expressions | |
105 | ||
106 | BOOST_LOG_CLOSE_NAMESPACE // namespace log | |
107 | ||
108 | #ifndef BOOST_LOG_DOXYGEN_PASS | |
109 | ||
110 | namespace phoenix { | |
111 | ||
112 | namespace result_of { | |
113 | ||
114 | template< typename CharT > | |
115 | struct is_nullary< custom_terminal< boost::log::expressions::format_terminal< CharT > > > : | |
116 | public mpl::false_ | |
117 | { | |
118 | }; | |
119 | ||
120 | } // namespace result_of | |
121 | ||
122 | } // namespace phoenix | |
123 | ||
124 | #endif | |
125 | ||
126 | } // namespace boost | |
127 | ||
128 | #include <boost/log/detail/footer.hpp> | |
129 | ||
130 | #endif // BOOST_LOG_EXPRESSIONS_FORMATTERS_FORMAT_HPP_INCLUDED_ |