[857] | 1 | // Boost string_algo library find_regex.hpp header file ---------------------------//
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| 2 |
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| 3 | // Copyright Pavol Droba 2002-2003. Use, modification and
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| 4 | // distribution is subject to the Boost Software License, Version
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| 5 | // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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| 6 | // http://www.boost.org/LICENSE_1_0.txt)
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| 7 |
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| 8 | // See http://www.boost.org for updates, documentation, and revision history.
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| 9 |
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| 10 | #ifndef BOOST_STRING_FINDER_REGEX_DETAIL_HPP
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| 11 | #define BOOST_STRING_FINDER_REGEX_DETAIL_HPP
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| 12 |
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| 13 | #include <boost/algorithm/string/config.hpp>
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| 14 | #include <boost/regex.hpp>
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| 15 |
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| 16 | #include <boost/range/iterator_range.hpp>
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| 17 | #include <boost/range/begin.hpp>
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| 18 | #include <boost/range/end.hpp>
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| 19 |
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| 20 | namespace boost {
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| 21 | namespace algorithm {
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| 22 | namespace detail {
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| 23 |
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| 24 | // regex find functor -----------------------------------------------//
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| 25 |
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| 26 | // regex search result
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| 27 | template<typename IteratorT>
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| 28 | struct regex_search_result :
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| 29 | public iterator_range<IteratorT>
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| 30 | {
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| 31 | typedef regex_search_result<IteratorT> type;
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| 32 | typedef iterator_range<IteratorT> base_type;
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| 33 | typedef BOOST_STRING_TYPENAME base_type::value_type value_type;
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| 34 | typedef BOOST_STRING_TYPENAME base_type::difference_type difference_type;
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| 35 | typedef BOOST_STRING_TYPENAME base_type::const_iterator const_iterator;
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| 36 | typedef BOOST_STRING_TYPENAME base_type::iterator iterator;
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| 37 | typedef boost::match_results<iterator> match_results_type;
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| 38 |
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| 39 | // Construction
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| 40 |
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| 41 | // Construction from the match result
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| 42 | regex_search_result( const match_results_type& MatchResults ) :
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| 43 | base_type( MatchResults[0].first, MatchResults[0].second ),
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| 44 | m_MatchResults( MatchResults ) {}
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| 45 |
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| 46 | // Construction of empty match. End iterator has to be specified
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| 47 | regex_search_result( IteratorT End ) :
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| 48 | base_type( End, End ) {}
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| 49 |
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| 50 | regex_search_result( const regex_search_result& Other ) :
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| 51 | base_type( Other.begin(), Other.end() ),
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| 52 | m_MatchResults( Other.m_MatchResults ) {}
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| 53 |
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| 54 | // Assignment
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| 55 | regex_search_result& operator=( const regex_search_result& Other )
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| 56 | {
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| 57 | base_type::operator=( Other );
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| 58 | m_MatchResults=Other.m_MatchResults;
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| 59 | return *this;
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| 60 | }
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| 61 |
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| 62 | // Match result retrival
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| 63 | const match_results_type& match_results() const
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| 64 | {
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| 65 | return m_MatchResults;
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| 66 | }
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| 67 |
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| 68 | private:
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| 69 | // Saved matchresult
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| 70 | match_results_type m_MatchResults;
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| 71 | };
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| 72 |
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| 73 | // find_regex
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| 74 | /*
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| 75 | Regex based search functor
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| 76 | */
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| 77 | template<typename RegExT>
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| 78 | struct find_regexF
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| 79 | {
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| 80 | typedef RegExT regex_type;
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| 81 | typedef const RegExT& regex_reference_type;
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| 82 |
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| 83 | // Construction
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| 84 | find_regexF( regex_reference_type Rx, match_flag_type MatchFlags = match_default ) :
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| 85 | m_Rx(Rx), m_MatchFlags(MatchFlags) {}
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| 86 |
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| 87 | // Operation
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| 88 | template< typename ForwardIteratorT >
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| 89 | regex_search_result<ForwardIteratorT>
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| 90 | operator()(
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| 91 | ForwardIteratorT Begin,
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| 92 | ForwardIteratorT End ) const
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| 93 | {
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| 94 | typedef ForwardIteratorT input_iterator_type;
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| 95 | typedef regex_search_result<ForwardIteratorT> result_type;
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| 96 |
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| 97 | // instantiate match result
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| 98 | match_results<input_iterator_type> result;
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| 99 | // search for a match
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| 100 | if ( regex_search( Begin, End, result, m_Rx, m_MatchFlags ) )
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| 101 | {
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| 102 | // construct a result
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| 103 | return result_type( result );
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| 104 | }
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| 105 | else
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| 106 | {
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| 107 | // empty result
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| 108 | return result_type( End );
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| 109 | }
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| 110 | }
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| 111 |
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| 112 | private:
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| 113 | regex_reference_type m_Rx; // Regexp
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| 114 | match_flag_type m_MatchFlags; // match flags
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| 115 | };
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| 116 |
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| 117 | } // namespace detail
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| 118 | } // namespace algorithm
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| 119 | } // namespace boost
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| 120 |
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| 121 | #endif // BOOST_STRING_FIND_DETAIL_HPP
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