/*
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* Copyright Andrey Semashev 2007 - 2015.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*/
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/*!
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* \file support/std_regex.hpp
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* \author Andrey Semashev
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* \date 19.03.2014
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*
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* This header enables \c std::regex support for Boost.Log.
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*/
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#ifndef BOOST_LOG_SUPPORT_STD_REGEX_HPP_INCLUDED_
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#define BOOST_LOG_SUPPORT_STD_REGEX_HPP_INCLUDED_
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#include <boost/log/detail/config.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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#if defined(BOOST_NO_CXX11_HDR_REGEX)
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#if defined(__GNUC__)
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#pragma message "Boost.Log: This header requires support for std::regex in the standard library."
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#elif defined(_MSC_VER)
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#pragma message("Boost.Log: This header requires support for std::regex in the standard library.")
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#endif
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#else // defined(BOOST_NO_CXX11_HDR_REGEX)
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#include <regex>
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#include <string>
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#include <boost/log/utility/functional/matches.hpp>
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#include <boost/log/detail/header.hpp>
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namespace boost {
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BOOST_LOG_OPEN_NAMESPACE
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namespace aux {
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//! This tag type is used if an expression is recognized as \c std::regex
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struct std_regex_expression_tag;
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//! The metafunction detects the matching expression kind and returns a tag that is used to specialize \c match_traits
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template< typename CharT, typename ReTraitsT >
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struct matching_expression_kind< std::basic_regex< CharT, ReTraitsT > >
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{
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typedef std_regex_expression_tag type;
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};
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//! The matching function implementation
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template< typename ExpressionT >
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struct match_traits< ExpressionT, std_regex_expression_tag >
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{
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typedef ExpressionT compiled_type;
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static compiled_type compile(ExpressionT const& expr) { return expr; }
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template< typename StringT, typename CharT, typename ReTraitsT >
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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)
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{
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return std::regex_match(str.begin(), str.end(), expr, flags);
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}
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template< typename CharT, typename StringTraitsT, typename AllocatorT, typename ReTraitsT >
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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)
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{
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const CharT* p = str.c_str();
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return std::regex_match(p, p + str.size(), expr, flags);
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}
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};
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} // namespace aux
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BOOST_LOG_CLOSE_NAMESPACE // namespace log
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} // namespace boost
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#include <boost/log/detail/footer.hpp>
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#endif // defined(BOOST_NO_CXX11_HDR_REGEX)
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#endif // BOOST_LOG_SUPPORT_STD_REGEX_HPP_INCLUDED_
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