ceph/src/boost/libs/log/include/boost/log/expressions/predicates/matches.hpp

   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   matches.hpp
   9  * \author Andrey Semashev
  10  * \date   02.09.2012
  11  *
  12  * The header contains implementation of a \c matches predicate in template expressions.
  13  */
  14
  15 #ifndef BOOST_LOG_EXPRESSIONS_PREDICATES_MATCHES_HPP_INCLUDED_
  16 #define BOOST_LOG_EXPRESSIONS_PREDICATES_MATCHES_HPP_INCLUDED_
  17
  18 #include <boost/phoenix/core/actor.hpp>
  19 #include <boost/log/detail/config.hpp>
  20 #include <boost/log/detail/unary_function_terminal.hpp>
  21 #include <boost/log/detail/attribute_predicate.hpp>
  22 #include <boost/log/expressions/attr_fwd.hpp>
  23 #include <boost/log/expressions/keyword_fwd.hpp>
  24 #include <boost/log/attributes/attribute_name.hpp>
  25 #include <boost/log/attributes/fallback_policy.hpp>
  26 #include <boost/log/utility/functional/matches.hpp>
  27 #include <boost/log/detail/header.hpp>
  28
  29 #ifdef BOOST_HAS_PRAGMA_ONCE
  30 #pragma once
  31 #endif
  32
  33 namespace boost {
  34
  35 BOOST_LOG_OPEN_NAMESPACE
  36
  37 namespace expressions {
  38
  39 /*!
  40  * The predicate checks if the attribute value matches a regular expression. The attribute value is assumed to be of a string type.
  41  */
  42 template< typename T, typename RegexT, typename FallbackPolicyT = fallback_to_none >
  43 class attribute_matches :
  44     public aux::attribute_predicate< T, typename boost::log::aux::match_traits< RegexT >::compiled_type, matches_fun, FallbackPolicyT >
  45 {
  46     typedef aux::attribute_predicate< T, typename boost::log::aux::match_traits< RegexT >::compiled_type, matches_fun, FallbackPolicyT > base_type;
  47
  48 public:
  49     /*!
  50      * Initializing constructor
  51      *
  52      * \param name Attribute name
  53      * \param rex The regular expression to match the attribute value against
  54      */
  55     attribute_matches(attribute_name const& name, RegexT const& rex) : base_type(name, boost::log::aux::match_traits< RegexT >::compile(rex))
  56     {
  57     }
  58
  59     /*!
  60      * Initializing constructor
  61      *
  62      * \param name Attribute name
  63      * \param rex The regular expression to match the attribute value against
  64      * \param arg Additional parameter for the fallback policy
  65      */
  66     template< typename U >
  67     attribute_matches(attribute_name const& name, RegexT const& rex, U const& arg) : base_type(name, boost::log::aux::match_traits< RegexT >::compile(rex), arg)
  68     {
  69     }
  70 };
  71
  72 /*!
  73  * The function generates a terminal node in a template expression. The node will check if the attribute value,
  74  * which is assumed to be a string, matches the specified regular expression.
  75  */
  76 template< typename T, typename FallbackPolicyT, typename TagT, template< typename > class ActorT, typename RegexT >
  77 BOOST_FORCEINLINE ActorT< aux::unary_function_terminal< attribute_matches< T, RegexT, FallbackPolicyT > > >
  78 matches(attribute_actor< T, FallbackPolicyT, TagT, ActorT > const& attr, RegexT const& rex)
  79 {
  80     typedef aux::unary_function_terminal< attribute_matches< T, RegexT, FallbackPolicyT > > terminal_type;
  81     ActorT< terminal_type > act = {{ terminal_type(attr.get_name(), rex, attr.get_fallback_policy()) }};
  82     return act;
  83 }
  84
  85 /*!
  86  * The function generates a terminal node in a template expression. The node will check if the attribute value,
  87  * which is assumed to be a string, matches the specified regular expression.
  88  */
  89 template< typename DescriptorT, template< typename > class ActorT, typename RegexT >
  90 BOOST_FORCEINLINE ActorT< aux::unary_function_terminal< attribute_matches< typename DescriptorT::value_type, RegexT > > >
  91 matches(attribute_keyword< DescriptorT, ActorT > const&, RegexT const& rex)
  92 {
  93     typedef aux::unary_function_terminal< attribute_matches< typename DescriptorT::value_type, RegexT > > terminal_type;
  94     ActorT< terminal_type > act = {{ terminal_type(DescriptorT::get_name(), rex) }};
  95     return act;
  96 }
  97
  98 /*!
  99  * The function generates a terminal node in a template expression. The node will check if the attribute value,
 100  * which is assumed to be a string, matches the specified regular expression.
 101  */
 102 template< typename T, typename RegexT >
 103 BOOST_FORCEINLINE phoenix::actor< aux::unary_function_terminal< attribute_matches< T, RegexT > > >
 104 matches(attribute_name const& name, RegexT const& rex)
 105 {
 106     typedef aux::unary_function_terminal< attribute_matches< T, RegexT > > terminal_type;
 107     phoenix::actor< terminal_type > act = {{ terminal_type(name, rex) }};
 108     return act;
 109 }
 110
 111 } // namespace expressions
 112
 113 BOOST_LOG_CLOSE_NAMESPACE // namespace log
 114
 115 } // namespace boost
 116
 117 #include <boost/log/detail/footer.hpp>
 118
 119 #endif // BOOST_LOG_EXPRESSIONS_PREDICATES_MATCHES_HPP_INCLUDED_