vector - Why does this piece of c++ not find the struct member 'filename'? -

            (torrent_info::file_iterator = t.begin_files();                     != t.end_files(); ++i, ++index)             {                     int first = t.map_file(index, 0, 1).piece;                     int last = t.map_file(index, i->size - 1, 1).piece;                     std::cout << "  " << std::setw(11) << i->size                             << " " << i.filename() << "[ " << first << ", "                             << last << " ]\n";             } 

compiling gives me following error:

error: ‘class __gnu_cxx::__normal_iterator<const libtorrent::internal_file_entry*, std::vector<libtorrent::internal_file_entry, std::allocator<libtorrent::internal_file_entry> > >’ has no member named ‘filename’ 

afaics i constant internal_file_entry struct header code lives here in open source libtorrent project. i'm looking @ c++ first time can't life of me work out why above call i.filename() fails @ compile time?

i iterator points @ internal_file_entry - must dereferenced. access filename so:

i->filename 

this equivalent to:

(*i).filename