Current File : //usr/share/zsh/5.5.1/functions/_sh

#compdef sh ksh bash csh tcsh rc

if (( CURRENT == ${words[(i)-c]} + 1 )); then
  _cmdstring
else
  local n=${words[(b:2:i)[^-]*]}
  if (( n <= CURRENT )); then
    compset -n $n
    _alternative \
      'files:file:_files' \
      'commands:command:_normal' && return 0
  fi
  _default
fi