ceph/src/boost/boost/log/support/xpressive.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/xpressive.hpp
   9  * \author Andrey Semashev
  10  * \date   18.07.2009
  11  *
  12  * This header enables Boost.Xpressive support for Boost.Log.
  13  */
  14
  15 #ifndef BOOST_LOG_SUPPORT_XPRESSIVE_HPP_INCLUDED_
  16 #define BOOST_LOG_SUPPORT_XPRESSIVE_HPP_INCLUDED_
  17
  18 #include <string>
  19 #include <boost/xpressive/basic_regex.hpp>
  20 #include <boost/xpressive/regex_constants.hpp>
  21 #include <boost/xpressive/regex_algorithms.hpp>
  22 #include <boost/log/detail/config.hpp>
  23 #include <boost/log/utility/functional/matches.hpp>
  24 #include <boost/log/detail/header.hpp>
  25
  26 #ifdef BOOST_HAS_PRAGMA_ONCE
  27 #pragma once
  28 #endif
  29
  30 namespace boost {
  31
  32 BOOST_LOG_OPEN_NAMESPACE
  33
  34 namespace aux {
  35
  36 //! This tag type is used if an expression is recognized as a Boost.Xpressive expression
  37 struct boost_xpressive_expression_tag;
  38
  39 //! The metafunction detects the matching expression kind and returns a tag that is used to specialize \c match_traits
  40 template< typename T >
  41 struct matching_expression_kind< xpressive::basic_regex< T > >
  42 {
  43     typedef boost_xpressive_expression_tag type;
  44 };
  45
  46 //! The matching function implementation
  47 template< typename ExpressionT >
  48 struct match_traits< ExpressionT, boost_xpressive_expression_tag >
  49 {
  50     typedef ExpressionT compiled_type;
  51     static compiled_type compile(ExpressionT const& expr) { return expr; }
  52
  53     template< typename StringT, typename T >
  54     static bool matches(StringT const& str, xpressive::basic_regex< T > const& expr, xpressive::regex_constants::match_flag_type flags = xpressive::regex_constants::match_default)
  55     {
  56         return xpressive::regex_match(str, expr, flags);
  57     }
  58
  59     template< typename CharT, typename TraitsT, typename AllocatorT >
  60     static bool matches(std::basic_string< CharT, TraitsT, AllocatorT > const& str, xpressive::basic_regex< const CharT* > const& expr, xpressive::regex_constants::match_flag_type flags = xpressive::regex_constants::match_default)
  61     {
  62         const CharT* p = str.c_str();
  63         return xpressive::regex_match(p, p + str.size(), expr, flags);
  64     }
  65 };
  66
  67 } // namespace aux
  68
  69 BOOST_LOG_CLOSE_NAMESPACE // namespace log
  70
  71 } // namespace boost
  72
  73 #include <boost/log/detail/footer.hpp>
  74
  75 #endif // BOOST_LOG_SUPPORT_XPRESSIVE_HPP_INCLUDED_