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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 bind_to_log.hpp | |
9 | * \author Andrey Semashev | |
10 | * \date 06.11.2012 | |
11 | * | |
12 | * This header contains a function object that puts the received value to the bound stream using the \c to_log manipulator. | |
13 | * This is a lightweight alternative to what Boost.Phoenix and Boost.Lambda provides. | |
14 | */ | |
15 | ||
16 | #ifndef BOOST_LOG_UTILITY_FUNCTIONAL_BIND_TO_LOG_HPP_INCLUDED_ | |
17 | #define BOOST_LOG_UTILITY_FUNCTIONAL_BIND_TO_LOG_HPP_INCLUDED_ | |
18 | ||
19 | #include <boost/log/detail/config.hpp> | |
20 | #include <boost/log/utility/functional/bind.hpp> | |
21 | #include <boost/log/utility/manipulators/to_log.hpp> | |
22 | #include <boost/log/detail/header.hpp> | |
23 | ||
24 | #ifdef BOOST_HAS_PRAGMA_ONCE | |
25 | #pragma once | |
26 | #endif | |
27 | ||
28 | namespace boost { | |
29 | ||
30 | BOOST_LOG_OPEN_NAMESPACE | |
31 | ||
32 | //! The function object that outputs its second operand to the first one | |
33 | template< typename TagT = void > | |
34 | struct to_log_fun | |
35 | { | |
36 | typedef void result_type; | |
37 | ||
38 | template< typename StreamT, typename T > | |
39 | void operator() (StreamT& strm, T const& val) const | |
40 | { | |
41 | strm << boost::log::to_log< TagT >(val); | |
42 | } | |
43 | }; | |
44 | ||
45 | //! The function object that outputs its second operand to the first one | |
46 | template< > | |
47 | struct to_log_fun< void > | |
48 | { | |
49 | typedef void result_type; | |
50 | ||
51 | template< typename StreamT, typename T > | |
52 | void operator() (StreamT& strm, T const& val) const | |
53 | { | |
54 | strm << boost::log::to_log(val); | |
55 | } | |
56 | }; | |
57 | ||
58 | template< typename StreamT > | |
59 | BOOST_FORCEINLINE binder1st< to_log_fun< >, StreamT& > bind_to_log(StreamT& strm) | |
60 | { | |
61 | return binder1st< to_log_fun< >, StreamT& >(to_log_fun< >(), strm); | |
62 | } | |
63 | ||
64 | template< typename TagT, typename StreamT > | |
65 | BOOST_FORCEINLINE binder1st< to_log_fun< TagT >, StreamT& > bind_to_log(StreamT& strm) | |
66 | { | |
67 | return binder1st< to_log_fun< TagT >, StreamT& >(to_log_fun< TagT >(), strm); | |
68 | } | |
69 | ||
70 | BOOST_LOG_CLOSE_NAMESPACE // namespace log | |
71 | ||
72 | } // namespace boost | |
73 | ||
74 | #include <boost/log/detail/footer.hpp> | |
75 | ||
76 | #endif // BOOST_LOG_UTILITY_FUNCTIONAL_BIND_TO_LOG_HPP_INCLUDED_ |