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