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1/*=============================================================================
2    Copyright (c) 2002-2003 Hartmut Kaiser
3    http://spirit.sourceforge.net/
4
5    Use, modification and distribution is subject to the Boost Software
6    License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
7    http://www.boost.org/LICENSE_1_0.txt)
8=============================================================================*/
9#ifndef BOOST_SPIRIT_REGEX_IPP
10#define BOOST_SPIRIT_REGEX_IPP
11
12///////////////////////////////////////////////////////////////////////////////
13#include <boost/spirit/home/classic/core/primitives/impl/primitives.ipp>
14
15///////////////////////////////////////////////////////////////////////////////
16namespace boost { namespace spirit {
17
18BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN
19
20namespace impl {
21
22///////////////////////////////////////////////////////////////////////////////
23//
24inline const char* rx_prefix(char) { return "\\A"; }
25inline const wchar_t* rx_prefix(wchar_t) { return L"\\A"; }
26
27///////////////////////////////////////////////////////////////////////////////
28//
29//  rx_parser class
30//
31///////////////////////////////////////////////////////////////////////////////
32template <typename CharT = char>
33class rx_parser : public parser<rx_parser<CharT> > {
34
35public:
36    typedef std::basic_string<CharT> string_t;
37    typedef rx_parser<CharT> self_t;
38
39    rx_parser(CharT const *first, CharT const *last)
40    {
41        rxstr = string_t(rx_prefix(CharT())) + string_t(first, last);
42    }
43
44    rx_parser(CharT const *first)
45    {
46        rxstr = string_t(rx_prefix(CharT())) +
47            string_t(first, impl::get_last(first));
48    }
49
50    template <typename ScannerT>
51    typename parser_result<self_t, ScannerT>::type
52    parse(ScannerT const& scan) const
53    {
54        boost::match_results<typename ScannerT::iterator_t> what;
55        boost::regex_search(scan.first, scan.last, what, rxstr,
56            boost::match_default);
57
58        if (!what[0].matched)
59            return scan.no_match();
60
61        scan.first = what[0].second;
62        return scan.create_match(what[0].length(), nil_t(),
63            what[0].first, scan.first);
64    }
65
66private:
67#if BOOST_VERSION >= 013300
68    boost::basic_regex<CharT> rxstr;       // regular expression to match
69#else
70    boost::reg_expression<CharT> rxstr;    // regular expression to match
71#endif
72};
73
74}   // namespace impl
75
76///////////////////////////////////////////////////////////////////////////////
77BOOST_SPIRIT_CLASSIC_NAMESPACE_END
78
79}} // namespace boost::spirit
80
81#endif // BOOST_SPIRIT_REGEX_IPP
82