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; compileboost::aux::match_traits51 static compiled_type compile(ExpressionT const& expr) { return expr; } 52 53 template< typename StringT, typename T > matchesboost::aux::match_traits54 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 > matchesboost::aux::match_traits60 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_ 76