41 #ifdef PB_DS_HT_MAP_TRACE_    48   std::cerr << static_cast<unsigned long>(m_num_e) << 
" "     49             << static_cast<unsigned long>(m_num_used_e) << 
std::endl;
    51   for (size_type i = 0; i < m_num_e; ++i)
    53       std::cerr << static_cast<unsigned long>(i) << 
" ";
    54       trace_list(m_entries[i]);
    62 trace_list(const_entry_pointer p_l)
 const    64   size_type iterated_num_used_e = 0;
    67       std::cerr << PB_DS_V2F(p_l->m_value) << 
" ";
 basic_ostream< _CharT, _Traits > & endl(basic_ostream< _CharT, _Traits > &__os)
Write a newline and flush the stream. 
ostream cerr
Linked to standard output.