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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 contains.hpp | |
9 | * \author Andrey Semashev | |
10 | * \date 02.09.2012 | |
11 | * | |
12 | * The header contains implementation of a \c contains predicate in template expressions. | |
13 | */ | |
14 | ||
15 | #ifndef BOOST_LOG_EXPRESSIONS_PREDICATES_CONTAINS_HPP_INCLUDED_ | |
16 | #define BOOST_LOG_EXPRESSIONS_PREDICATES_CONTAINS_HPP_INCLUDED_ | |
17 | ||
18 | #include <boost/phoenix/core/actor.hpp> | |
19 | #include <boost/log/detail/config.hpp> | |
20 | #include <boost/log/detail/embedded_string_type.hpp> | |
21 | #include <boost/log/detail/unary_function_terminal.hpp> | |
22 | #include <boost/log/detail/attribute_predicate.hpp> | |
23 | #include <boost/log/expressions/attr_fwd.hpp> | |
24 | #include <boost/log/expressions/keyword_fwd.hpp> | |
25 | #include <boost/log/attributes/attribute_name.hpp> | |
26 | #include <boost/log/attributes/fallback_policy.hpp> | |
27 | #include <boost/log/utility/functional/contains.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 | * The predicate checks if the attribute value contains a substring. The attribute value is assumed to be of a string type. | |
42 | */ | |
43 | #if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES) | |
44 | ||
45 | template< typename T, typename SubstringT, typename FallbackPolicyT = fallback_to_none > | |
46 | using attribute_contains = aux::attribute_predicate< T, SubstringT, contains_fun, FallbackPolicyT >; | |
47 | ||
48 | #else // !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES) | |
49 | ||
50 | template< typename T, typename SubstringT, typename FallbackPolicyT = fallback_to_none > | |
51 | class attribute_contains : | |
52 | public aux::attribute_predicate< T, SubstringT, contains_fun, FallbackPolicyT > | |
53 | { | |
54 | typedef aux::attribute_predicate< T, SubstringT, contains_fun, FallbackPolicyT > base_type; | |
55 | ||
56 | public: | |
57 | /*! | |
58 | * Initializing constructor | |
59 | * | |
60 | * \param name Attribute name | |
61 | * \param substring The expected attribute value substring | |
62 | */ | |
63 | attribute_contains(attribute_name const& name, SubstringT const& substring) : base_type(name, substring) | |
64 | { | |
65 | } | |
66 | ||
67 | /*! | |
68 | * Initializing constructor | |
69 | * | |
70 | * \param name Attribute name | |
71 | * \param substring The expected attribute value substring | |
72 | * \param arg Additional parameter for the fallback policy | |
73 | */ | |
74 | template< typename U > | |
75 | attribute_contains(attribute_name const& name, SubstringT const& substring, U const& arg) : base_type(name, substring, arg) | |
76 | { | |
77 | } | |
78 | }; | |
79 | ||
80 | #endif // !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES) | |
81 | ||
82 | /*! | |
83 | * The function generates a terminal node in a template expression. The node will check if the attribute value, | |
84 | * which is assumed to be a string, contains the specified substring. | |
85 | */ | |
86 | template< typename T, typename FallbackPolicyT, typename TagT, template< typename > class ActorT, typename SubstringT > | |
87 | BOOST_FORCEINLINE ActorT< aux::unary_function_terminal< attribute_contains< T, typename boost::log::aux::make_embedded_string_type< SubstringT >::type, FallbackPolicyT > > > | |
88 | contains(attribute_actor< T, FallbackPolicyT, TagT, ActorT > const& attr, SubstringT const& substring) | |
89 | { | |
90 | typedef aux::unary_function_terminal< attribute_contains< T, typename boost::log::aux::make_embedded_string_type< SubstringT >::type, FallbackPolicyT > > terminal_type; | |
91 | ActorT< terminal_type > act = {{ terminal_type(attr.get_name(), substring, attr.get_fallback_policy()) }}; | |
92 | return act; | |
93 | } | |
94 | ||
95 | /*! | |
96 | * The function generates a terminal node in a template expression. The node will check if the attribute value, | |
97 | * which is assumed to be a string, contains the specified substring. | |
98 | */ | |
99 | template< typename DescriptorT, template< typename > class ActorT, typename SubstringT > | |
100 | BOOST_FORCEINLINE ActorT< aux::unary_function_terminal< attribute_contains< typename DescriptorT::value_type, typename boost::log::aux::make_embedded_string_type< SubstringT >::type > > > | |
101 | contains(attribute_keyword< DescriptorT, ActorT > const&, SubstringT const& substring) | |
102 | { | |
103 | typedef aux::unary_function_terminal< attribute_contains< typename DescriptorT::value_type, typename boost::log::aux::make_embedded_string_type< SubstringT >::type > > terminal_type; | |
104 | ActorT< terminal_type > act = {{ terminal_type(DescriptorT::get_name(), substring) }}; | |
105 | return act; | |
106 | } | |
107 | ||
108 | /*! | |
109 | * The function generates a terminal node in a template expression. The node will check if the attribute value, | |
110 | * which is assumed to be a string, contains the specified substring. | |
111 | */ | |
112 | template< typename T, typename SubstringT > | |
113 | BOOST_FORCEINLINE phoenix::actor< aux::unary_function_terminal< attribute_contains< T, typename boost::log::aux::make_embedded_string_type< SubstringT >::type > > > | |
114 | contains(attribute_name const& name, SubstringT const& substring) | |
115 | { | |
116 | typedef aux::unary_function_terminal< attribute_contains< T, typename boost::log::aux::make_embedded_string_type< SubstringT >::type > > terminal_type; | |
117 | phoenix::actor< terminal_type > act = {{ terminal_type(name, substring) }}; | |
118 | return act; | |
119 | } | |
120 | ||
121 | } // namespace expressions | |
122 | ||
123 | BOOST_LOG_CLOSE_NAMESPACE // namespace log | |
124 | ||
125 | } // namespace boost | |
126 | ||
127 | #include <boost/log/detail/footer.hpp> | |
128 | ||
129 | #endif // BOOST_LOG_EXPRESSIONS_PREDICATES_CONTAINS_HPP_INCLUDED_ |