Ticket #8489: iterator-adaptor.error-program.20130423.cc

// A short program illustrating a Boost error.
#include <iterator>
#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/include/classic_position_iterator.hpp>

template <typename Iterator>
struct whitespace_grammar
    : public boost::spirit::qi::grammar<Iterator> {
  whitespace_grammar();
 private:
  boost::spirit::qi::rule<Iterator> whitespace;
};

template <typename Iterator>
whitespace_grammar<Iterator>::whitespace_grammar()
    : whitespace_grammar::base_type(whitespace)
{
  using boost::spirit::qi::omit;
  whitespace = omit[""];
}

typedef std::istreambuf_iterator<char> base_iterator_t;
typedef boost::spirit::classic::position_iterator2<base_iterator_t> pos_iterator_t;
template struct whitespace_grammar<pos_iterator_t>;

int main() {
}