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
28namespace boost {
29
30BOOST_LOG_OPEN_NAMESPACE
31
32//! The function object that outputs its second operand to the first one
33template< typename TagT = void >
34struct 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
46template< >
47struct 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
58template< typename StreamT >
59BOOST_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
64template< typename TagT, typename StreamT >
65BOOST_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
70BOOST_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_
77

source code of boost/libs/log/include/boost/log/utility/functional/bind_to_log.hpp