ceph/src/boost/libs/log/include/boost/log/support/std_regex.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   support/std_regex.hpp
   9  * \author Andrey Semashev
  10  * \date   19.03.2014
  11  *
  12  * This header enables \c std::regex support for Boost.Log.
  13  */
  14
  15 #ifndef BOOST_LOG_SUPPORT_STD_REGEX_HPP_INCLUDED_
  16 #define BOOST_LOG_SUPPORT_STD_REGEX_HPP_INCLUDED_
  17
  18 #include <boost/log/detail/config.hpp>
  19
  20 #ifdef BOOST_HAS_PRAGMA_ONCE
  21 #pragma once
  22 #endif
  23
  24 #if defined(BOOST_NO_CXX11_HDR_REGEX)
  25
  26 #if defined(__GNUC__)
  27 #pragma message "Boost.Log: This header requires support for std::regex in the standard library."
  28 #elif defined(_MSC_VER)
  29 #pragma message("Boost.Log: This header requires support for std::regex in the standard library.")
  30 #endif
  31
  32 #else // defined(BOOST_NO_CXX11_HDR_REGEX)
  33
  34 #include <regex>
  35 #include <string>
  36 #include <boost/log/utility/functional/matches.hpp>
  37 #include <boost/log/detail/header.hpp>
  38
  39 namespace boost {
  40
  41 BOOST_LOG_OPEN_NAMESPACE
  42
  43 namespace aux {
  44
  45 //! This tag type is used if an expression is recognized as \c std::regex
  46 struct std_regex_expression_tag;
  47
  48 //! The metafunction detects the matching expression kind and returns a tag that is used to specialize \c match_traits
  49 template< typename CharT, typename ReTraitsT >
  50 struct matching_expression_kind< std::basic_regex< CharT, ReTraitsT > >
  51 {
  52     typedef std_regex_expression_tag type;
  53 };
  54
  55 //! The matching function implementation
  56 template< typename ExpressionT >
  57 struct match_traits< ExpressionT, std_regex_expression_tag >
  58 {
  59     typedef ExpressionT compiled_type;
  60     static compiled_type compile(ExpressionT const& expr) { return expr; }
  61
  62     template< typename StringT, typename CharT, typename ReTraitsT >
  63     static bool matches(StringT const& str, std::basic_regex< CharT, ReTraitsT > const& expr, std::regex_constants::match_flag_type flags = std::regex_constants::match_default)
  64     {
  65         return std::regex_match(str.begin(), str.end(), expr, flags);
  66     }
  67
  68     template< typename CharT, typename StringTraitsT, typename AllocatorT, typename ReTraitsT >
  69     static bool matches(std::basic_string< CharT, StringTraitsT, AllocatorT > const& str, std::basic_regex< CharT, ReTraitsT > const& expr, std::regex_constants::match_flag_type flags = std::regex_constants::match_default)
  70     {
  71         const CharT* p = str.c_str();
  72         return std::regex_match(p, p + str.size(), expr, flags);
  73     }
  74 };
  75
  76 } // namespace aux
  77
  78 BOOST_LOG_CLOSE_NAMESPACE // namespace log
  79
  80 } // namespace boost
  81
  82 #include <boost/log/detail/footer.hpp>
  83
  84 #endif // defined(BOOST_NO_CXX11_HDR_REGEX)
  85
  86 #endif // BOOST_LOG_SUPPORT_STD_REGEX_HPP_INCLUDED_