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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