function ..; cd ..; end
function ...; cd ../..; end
function ....; cd ../../..; end
function .....; cd ../../../..; end

function d; __fastdir_dirhist -l -n; end
abbr -- - 'cd -'

function 1; __fastdir_cd_num 1; end
function 2; __fastdir_cd_num 2; end
function 3; __fastdir_cd_num 3; end
function 4; __fastdir_cd_num 4; end
function 5; __fastdir_cd_num 5; end
function 6; __fastdir_cd_num 6; end
function 7; __fastdir_cd_num 7; end
function 8; __fastdir_cd_num 8; end
function 9; __fastdir_cd_num 9; end