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