namespace boost {
  namespace text {
    template<typename Iter> struct replace_result;
    namespace v1 {
      template<nf Normalization, utf_string String, code_point_iter I, 
               typename StringIter = std::ranges::iterator_t<String> > 
        replace_result< StringIter > 
        normalize_replace(String &, StringIter, StringIter, I, I, 
                          insertion_normalization = insertion_not_normalized);
      template<nf Normalization, utf_string String, code_point_iter I, 
               typename StringIter = std::ranges::iterator_t<String> > 
        replace_result< StringIter > 
        normalize_insert(String &, StringIter, I, I, 
                         insertion_normalization = insertion_not_normalized);
      template<nf Normalization, utf_string String, code_point_range R, 
               typename StringIter = std::ranges::iterator_t<String> > 
        replace_result< StringIter > 
        normalize_insert(String &, StringIter, R &&, 
                         insertion_normalization = insertion_not_normalized);
      template<nf Normalization, utf_string String, 
               typename StringIter = std::ranges::iterator_t<String> > 
        replace_result< StringIter > 
        normalize_erase(String &, StringIter, StringIter);
    }
  }
}namespace std {
  namespace ranges {
  }
}