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; compileboost::aux::match_traits60 static compiled_type compile(ExpressionT const& expr) { return expr; } 61 62 template< typename StringT, typename CharT, typename ReTraitsT > matchesboost::aux::match_traits63 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 > matchesboost::aux::match_traits69 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_ 87