[3408] | 1 | // Boost.Range library |
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| 2 | // |
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| 3 | // Copyright Thorsten Ottosen, Neil Groves 2006. 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 | // For more information, see http://www.boost.org/libs/range/ |
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| 9 | // |
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| 10 | |
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| 11 | #ifndef BOOST_RANGE_ADAPTOR_TOKENIZED_HPP |
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| 12 | #define BOOST_RANGE_ADAPTOR_TOKENIZED_HPP |
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| 13 | |
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| 14 | #include <boost/regex.hpp> |
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| 15 | #include <boost/range/iterator_range.hpp> |
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| 16 | |
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| 17 | namespace boost |
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| 18 | { |
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| 19 | namespace range_detail |
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| 20 | { |
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| 21 | |
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| 22 | template< class R > |
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| 23 | struct token_range : |
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| 24 | public boost::iterator_range< |
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| 25 | boost::regex_token_iterator< |
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| 26 | BOOST_DEDUCED_TYPENAME range_iterator<R>::type |
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| 27 | > |
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| 28 | > |
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| 29 | { |
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| 30 | private: |
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| 31 | typedef |
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| 32 | boost::regex_token_iterator< |
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| 33 | BOOST_DEDUCED_TYPENAME range_iterator<R>::type |
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| 34 | > |
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| 35 | regex_iter; |
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| 36 | |
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| 37 | typedef BOOST_DEDUCED_TYPENAME regex_iter::regex_type |
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| 38 | regex_type; |
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| 39 | |
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| 40 | typedef boost::iterator_range<regex_iter> |
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| 41 | base; |
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| 42 | |
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| 43 | public: |
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| 44 | template< class Regex, class Submatch, class Flag > |
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| 45 | token_range( R& r, const Regex& re, const Submatch& sub, Flag f ) |
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| 46 | : base( regex_iter( boost::begin(r), boost::end(r), |
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| 47 | regex_type(re), sub, f ), |
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| 48 | regex_iter() ) |
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| 49 | { } |
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| 50 | }; |
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| 51 | |
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| 52 | template< class T, class U, class V > |
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| 53 | struct regex_holder |
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| 54 | { |
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| 55 | const T& re; |
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| 56 | const U& sub; |
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| 57 | V f; |
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| 58 | |
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| 59 | regex_holder( const T& rex, const U& subm, V flag ) : |
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| 60 | re(rex), sub(subm), f(flag) |
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| 61 | { } |
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| 62 | private: |
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| 63 | // Not assignable |
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| 64 | void operator=(const regex_holder&); |
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| 65 | }; |
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| 66 | |
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| 67 | struct regex_forwarder |
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| 68 | { |
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| 69 | template< class Regex > |
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| 70 | regex_holder<Regex,int,regex_constants::match_flag_type> |
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| 71 | operator()( const Regex& re, |
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| 72 | int submatch = 0, |
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| 73 | regex_constants::match_flag_type f = |
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| 74 | regex_constants::match_default ) const |
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| 75 | { |
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| 76 | return regex_holder<Regex,int, |
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| 77 | regex_constants::match_flag_type>( re, submatch, f ); |
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| 78 | } |
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| 79 | |
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| 80 | template< class Regex, class Submatch > |
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| 81 | regex_holder<Regex,Submatch,regex_constants::match_flag_type> |
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| 82 | operator()( const Regex& re, |
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| 83 | const Submatch& sub, |
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| 84 | regex_constants::match_flag_type f = |
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| 85 | regex_constants::match_default ) const |
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| 86 | { |
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| 87 | return regex_holder<Regex,Submatch, |
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| 88 | regex_constants::match_flag_type>( re, sub, f ); |
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| 89 | } |
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| 90 | }; |
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| 91 | |
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| 92 | template< class BidirectionalRng, class R, class S, class F > |
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| 93 | inline token_range<BidirectionalRng> |
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| 94 | operator|( BidirectionalRng& r, |
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| 95 | const regex_holder<R,S,F>& f ) |
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| 96 | { |
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| 97 | return token_range<BidirectionalRng>( r, f.re, f.sub, f.f ); |
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| 98 | } |
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| 99 | |
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| 100 | template< class BidirectionalRng, class R, class S, class F > |
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| 101 | inline token_range<const BidirectionalRng> |
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| 102 | operator|( const BidirectionalRng& r, |
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| 103 | const regex_holder<R,S,F>& f ) |
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| 104 | { |
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| 105 | return token_range<const BidirectionalRng>( r, f.re, f.sub, f.f ); |
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| 106 | } |
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| 107 | |
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| 108 | } // 'range_detail' |
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| 109 | |
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| 110 | using range_detail::token_range; |
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| 111 | |
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| 112 | namespace adaptors |
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| 113 | { |
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| 114 | namespace |
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| 115 | { |
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| 116 | const range_detail::regex_forwarder tokenized = |
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| 117 | range_detail::regex_forwarder(); |
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| 118 | } |
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| 119 | |
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| 120 | template<class BidirectionalRange, class Regex, class Submatch, class Flag> |
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| 121 | inline token_range<BidirectionalRange> |
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| 122 | tokenize(BidirectionalRange& rng, const Regex& reg, const Submatch& sub, Flag f) |
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| 123 | { |
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| 124 | return token_range<BidirectionalRange>(rng, reg, sub, f); |
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| 125 | } |
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| 126 | |
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| 127 | template<class BidirectionalRange, class Regex, class Submatch, class Flag> |
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| 128 | inline token_range<const BidirectionalRange> |
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| 129 | tokenize(const BidirectionalRange& rng, const Regex& reg, const Submatch& sub, Flag f) |
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| 130 | { |
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| 131 | return token_range<const BidirectionalRange>(rng, reg, sub, f); |
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| 132 | } |
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| 133 | } // 'adaptors' |
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| 134 | |
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| 135 | } |
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| 136 | |
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| 137 | #endif |
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