namespace hpx {
  namespace parallel {
    namespace v1 {
      template<typename ExPolicy, typename InIter, typename T> 
        unspecified fill(ExPolicy &&, InIter, InIter, T);
      template<typename ExPolicy, typename OutIter, typename Size, typename T> 
        unspecified fill_n(ExPolicy &&, OutIter, Size, T);
    }
  }
}