[Boost-users] string_algo split iterator

From: Martin (adrianm_at_[hidden])
Date: 2005-04-07 08:47:30

I have a problem with the string_algo split_iterator.

Background is that I have a function that finds a string in a range of other 
strings.

template <typename CollectionT, typename RangeT, typename PredicateT>
inline unsigned int find_first_in_range(const CollectionT& Input, const 
RangeT& Search, PredicateT Comp) {
  typename boost::range_const_iterator<RangeT>::type 
    first = boost::begin(Search), 
    last  = boost::end(Search);

  for (unsigned int index = 1; first != last; ++first, ++index)
    if (Comp(Input, *first)) return index;
  return 0;
}

This function works fine if I send in a std::vector like
  std::vector<std::string> vec;
  vec.push_back("Item1"); vec.push_back("Item2");
  find_first_in_range(std::string("Item2"), vec, equals_pred());

equals_pred is just a functor version of the equals predicate that don't 
require the template arguments
struct equals_pred {
  template<typename T1, typename T2>
  bool operator()(const T1& arg1, const T2& arg2) const { return boost::equals
(arg1, arg2); }
};

But if I do the same thing with the split_iterator

  find_first_in_range(
    std::string("item2"),
    make_split_iterator(
      std::string("Item1,Item2,Item3,Item4"), first_finder(",")
    ),
    iequals_pred()
  );

I get an error (VC70)
boost\range\detail\const_iterator.hpp(34) : error C2039: 'const_iterator' : is 
not a member of 'boost::algorithm::split_iterator<IteratorT>'
        with
        [
IteratorT=boost::range_result_iterator<std::basic_string<char,std::char_traits<
char>,std::allocator<char>>>::type
        ]
boost\range\detail\const_iterator.hpp(118) : see reference to class template 
instantiation 'boost::range_detail::range_const_iterator_<T>::pts<C>' being 
compiled
        with
        [
            T=boost::range_detail::std_container_,
C=boost::algorithm::split_iterator<boost::range_result_iterator<std::basic_stri
ng<char,std::char_traits<char>,std::allocator<char>>>::type>
        ]