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Struct template regex_token_iterator

boost::xpressive::regex_token_iterator

Synopsis

template<typename BidiIter> 
struct regex_token_iterator {
  // types
  typedef basic_regex< BidiIter >          regex_type;       
  typedef iterator_value< BidiIter >::type char_type;        
  typedef sub_match< BidiIter >            value_type;       
  typedef std::ptrdiff_t                   difference_type;  
  typedef value_type const *               pointer;          
  typedef value_type const &               reference;        
  typedef std::forward_iterator_tag        iterator_category;

  // construct/copy/destruct
  regex_token_iterator();
  regex_token_iterator(BidiIter, BidiIter, basic_regex< BidiIter > const &);
  template<typename LetExpr> 
    regex_token_iterator(BidiIter, BidiIter, basic_regex< BidiIter > const &, 
                         unspecified);
  template<typename Subs> 
    regex_token_iterator(BidiIter, BidiIter, basic_regex< BidiIter > const &, 
                         Subs const &, 
                         regex_constants::match_flag_type = regex_constants::match_default);
  template<typename Subs, typename LetExpr> 
    regex_token_iterator(BidiIter, BidiIter, basic_regex< BidiIter > const &, 
                         Subs const &, unspecified, 
                         regex_constants::match_flag_type = regex_constants::match_default);
  regex_token_iterator(regex_token_iterator< BidiIter > const &);
  regex_token_iterator& operator=(regex_token_iterator< BidiIter > const &);

  // public member functions
  value_type const & operator *() const;
  value_type const * operator->() const;
  regex_token_iterator< BidiIter > & operator++() ;
  regex_token_iterator< BidiIter > operator++(int) ;
};

Description

regex_token_iterator public construct/copy/destruct

  1. regex_token_iterator();
  2. regex_token_iterator(BidiIter begin, BidiIter end, 
                         basic_regex< BidiIter > const & rex);

    Parameters:

    begin

    The beginning of the character range to search.

    end

    The end of the character range to search.

    rex

    The regex pattern to search for.

    Requires:

    [begin,end) is a valid range.

  3. template<typename LetExpr> 
      regex_token_iterator(BidiIter begin, BidiIter end, 
                           basic_regex< BidiIter > const & rex, unspecified args);

    Parameters:

    args

    A let() expression with argument bindings for semantic actions.

    begin

    The beginning of the character range to search.

    end

    The end of the character range to search.

    rex

    The regex pattern to search for.

    Requires:

    [begin,end) is a valid range.

  4. template<typename Subs> 
      regex_token_iterator(BidiIter begin, BidiIter end, 
                           basic_regex< BidiIter > const & rex, 
                           Subs const & subs, 
                           regex_constants::match_flag_type flags = regex_constants::match_default);

    Parameters:

    begin

    The beginning of the character range to search.

    end

    The end of the character range to search.

    flags

    Optional match flags, used to control how the expression is matched against the sequence. (See match_flag_type.)

    rex

    The regex pattern to search for.

    Requires:

    [begin,end) is a valid range.

    subs is either an integer greater or equal to -1, or else an array or non-empty std::vector<> of such integers.

  5. template<typename Subs, typename LetExpr> 
      regex_token_iterator(BidiIter begin, BidiIter end, 
                           basic_regex< BidiIter > const & rex, 
                           Subs const & subs, unspecified args, 
                           regex_constants::match_flag_type flags = regex_constants::match_default);

    Parameters:

    args

    A let() expression with argument bindings for semantic actions.

    begin

    The beginning of the character range to search.

    end

    The end of the character range to search.

    flags

    Optional match flags, used to control how the expression is matched against the sequence. (See match_flag_type.)

    rex

    The regex pattern to search for.

    Requires:

    [begin,end) is a valid range.

    subs is either an integer greater or equal to -1, or else an array or non-empty std::vector<> of such integers.

  6. regex_token_iterator(regex_token_iterator< BidiIter > const & that);
  7. regex_token_iterator& operator=(regex_token_iterator< BidiIter > const & that);

regex_token_iterator public member functions

  1. value_type const & operator *() const;
  2. value_type const * operator->() const;
  3. regex_token_iterator< BidiIter > & operator++() ;

    If N == -1 then sets *this equal to the end of sequence iterator. Otherwise if N+1 < subs.size(), then increments N and sets result equal to ((subs[N] == -1) ? value_type(what.prefix().str()) : value_type(what[subs[N]].str())). Otherwise if what.prefix().first != what[0].second and if the element match_prev_avail is not set in flags then sets it. Then locates the next match as if by calling regex_search(what[0].second, end, what, *pre, flags), with the following variation: in the event that the previous match found was of zero length (what[0].length() == 0) then attempts to find a non-zero length match starting at what[0].second, only if that fails and provided what[0].second != suffix().second does it look for a (possibly zero length) match starting from what[0].second + 1. If such a match is found then sets N equal to zero, and sets result equal to ((subs[N] == -1) ? value_type(what.prefix().str()) : value_type(what[subs[N]].str())). Otherwise if no further matches were found, then let last_end be the endpoint of the last match that was found. Then if last_end != end and subs[0] == -1 sets N equal to -1 and sets result equal to value_type(last_end, end). Otherwise sets *this equal to the end of sequence iterator.

  4. regex_token_iterator< BidiIter > operator++(int) ;

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