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/regex.hpp
9 * \author Andrey Semashev
10 * \date 18.07.2009
11 *
12 * This header enables Boost.Regex support for Boost.Log.
13 */
14
15#ifndef BOOST_LOG_SUPPORT_REGEX_HPP_INCLUDED_
16#define BOOST_LOG_SUPPORT_REGEX_HPP_INCLUDED_
17
18#include <string>
19#include <boost/regex.hpp>
20#include <boost/log/detail/config.hpp>
21#include <boost/log/utility/functional/matches.hpp>
22#include <boost/log/detail/header.hpp>
23
24#ifdef BOOST_HAS_PRAGMA_ONCE
25#pragma once
26#endif
27
28namespace boost {
29
30BOOST_LOG_OPEN_NAMESPACE
31
32namespace aux {
33
34//! This tag type is used if an expression is recognized as a Boost.Regex expression
35struct boost_regex_expression_tag;
36
37//! The metafunction detects the matching expression kind and returns a tag that is used to specialize \c match_traits
38template< typename CharT, typename TraitsT >
39struct matching_expression_kind< boost::basic_regex< CharT, TraitsT > >
40{
41 typedef boost_regex_expression_tag type;
42};
43
44//! The matching function implementation
45template< typename ExpressionT >
46struct match_traits< ExpressionT, boost_regex_expression_tag >
47{
48 typedef ExpressionT compiled_type;
49 static compiled_type compile(ExpressionT const& expr) { return expr; }
50
51 template< typename StringT, typename CharT, typename TraitsT >
52 static bool matches(StringT const& str, boost::basic_regex< CharT, TraitsT > const& expr, boost::regex_constants::match_flag_type flags = boost::regex_constants::match_default)
53 {
54 return boost::regex_match(str.begin(), str.end(), expr, flags);
55 }
56
57 template< typename CharT, typename StringTraitsT, typename AllocatorT, typename ReTraitsT >
58 static bool matches(
59 std::basic_string< CharT, StringTraitsT, AllocatorT > const& str,
60 boost::basic_regex< CharT, ReTraitsT > const& expr,
61 boost::regex_constants::match_flag_type flags = boost::regex_constants::match_default)
62 {
63 const CharT* p = str.c_str();
64 return boost::regex_match(p, p + str.size(), expr, flags);
65 }
66};
67
68} // namespace aux
69
70BOOST_LOG_CLOSE_NAMESPACE // namespace log
71
72} // namespace boost
73
74#include <boost/log/detail/footer.hpp>
75
76#endif // BOOST_LOG_SUPPORT_REGEX_HPP_INCLUDED_
77

source code of boost/libs/log/include/boost/log/support/regex.hpp