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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 value_ref_visitation.hpp | |
9 | * \author Andrey Semashev | |
10 | * \date 28.07.2012 | |
11 | * | |
12 | * \brief This header is the Boost.Log library implementation, see the library documentation | |
13 | * at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html. In this file | |
14 | * internal configuration macros are defined. | |
15 | */ | |
16 | ||
17 | #ifndef BOOST_LOG_DETAIL_VALUE_REF_VISITATION_HPP_INCLUDED_ | |
18 | #define BOOST_LOG_DETAIL_VALUE_REF_VISITATION_HPP_INCLUDED_ | |
19 | ||
20 | #include <boost/mpl/at.hpp> | |
21 | #include <boost/mpl/begin.hpp> | |
22 | #include <boost/mpl/end.hpp> | |
23 | #include <boost/mpl/advance.hpp> | |
24 | #include <boost/mpl/erase.hpp> | |
25 | #include <boost/mpl/size.hpp> | |
26 | #include <boost/preprocessor/arithmetic/inc.hpp> | |
27 | #include <boost/preprocessor/repetition/repeat_from_to.hpp> | |
28 | #include <boost/preprocessor/iteration/iterate.hpp> | |
29 | #include <boost/log/detail/config.hpp> | |
30 | #include <boost/log/detail/header.hpp> | |
31 | ||
32 | #ifndef BOOST_LOG_VALUE_REF_VISITATION_UNROLL_COUNT | |
33 | #define BOOST_LOG_VALUE_REF_VISITATION_UNROLL_COUNT 8 | |
34 | #endif | |
35 | ||
36 | namespace boost { | |
37 | ||
38 | BOOST_LOG_OPEN_NAMESPACE | |
39 | ||
40 | namespace aux { | |
41 | ||
42 | template< typename SequenceT, typename VisitorT, unsigned int SizeV = mpl::size< SequenceT >::value > | |
43 | struct apply_visitor_dispatch | |
44 | { | |
45 | typedef typename VisitorT::result_type result_type; | |
46 | ||
47 | static BOOST_FORCEINLINE result_type call(const void* p, unsigned int type_index, VisitorT& visitor) | |
48 | { | |
49 | typedef typename mpl::begin< SequenceT >::type begin_type; | |
50 | typedef typename mpl::advance_c< begin_type, SizeV / 2u >::type middle_type; | |
51 | if (type_index < (SizeV / 2u)) | |
52 | { | |
53 | typedef typename mpl::erase< SequenceT, middle_type, typename mpl::end< SequenceT >::type >::type new_sequence; | |
54 | typedef apply_visitor_dispatch< new_sequence, VisitorT > new_dispatch; | |
55 | return new_dispatch::call(p, type_index, visitor); | |
56 | } | |
57 | else | |
58 | { | |
59 | typedef typename mpl::erase< SequenceT, begin_type, middle_type >::type new_sequence; | |
60 | typedef apply_visitor_dispatch< new_sequence, VisitorT > new_dispatch; | |
61 | return new_dispatch::call(p, type_index - (SizeV / 2u), visitor); | |
62 | } | |
63 | } | |
64 | }; | |
65 | ||
66 | #define BOOST_LOG_AUX_CASE_ENTRY(z, i, data)\ | |
67 | case i: return visitor(*static_cast< typename mpl::at_c< SequenceT, i >::type const* >(p)); | |
68 | ||
69 | #define BOOST_PP_FILENAME_1 <boost/log/detail/value_ref_visitation.hpp> | |
70 | #define BOOST_PP_ITERATION_LIMITS (1, BOOST_PP_INC(BOOST_LOG_VALUE_REF_VISITATION_VTABLE_SIZE)) | |
71 | #include BOOST_PP_ITERATE() | |
72 | ||
73 | #undef BOOST_LOG_AUX_CASE_ENTRY | |
74 | ||
75 | } // namespace aux | |
76 | ||
77 | BOOST_LOG_CLOSE_NAMESPACE // namespace log | |
78 | ||
79 | } // namespace boost | |
80 | ||
81 | #include <boost/log/detail/footer.hpp> | |
82 | ||
83 | #endif // BOOST_LOG_DETAIL_VALUE_REF_VISITATION_HPP_INCLUDED_ | |
84 | ||
85 | #ifdef BOOST_PP_IS_ITERATING | |
86 | ||
87 | #define BOOST_LOG_AUX_SWITCH_SIZE BOOST_PP_ITERATION() | |
88 | ||
89 | template< typename SequenceT, typename VisitorT > | |
90 | struct apply_visitor_dispatch< SequenceT, VisitorT, BOOST_LOG_AUX_SWITCH_SIZE > | |
91 | { | |
92 | typedef typename VisitorT::result_type result_type; | |
93 | ||
94 | static BOOST_FORCEINLINE result_type call(const void* p, unsigned int type_index, VisitorT& visitor) | |
95 | { | |
96 | switch (type_index) | |
97 | { | |
98 | BOOST_PP_REPEAT_FROM_TO(1, BOOST_LOG_AUX_SWITCH_SIZE, BOOST_LOG_AUX_CASE_ENTRY, ~) | |
99 | default: | |
100 | return visitor(*static_cast< typename mpl::at_c< SequenceT, 0 >::type const* >(p)); | |
101 | } | |
102 | } | |
103 | }; | |
104 | ||
105 | #undef BOOST_LOG_AUX_SWITCH_SIZE | |
106 | ||
107 | #endif // BOOST_PP_IS_ITERATING |