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#compdef gdb

local cur="$words[CURRENT]" prev w list ret=1 expl

[[ "$PREFIX" = --* ]] &&
    _arguments -- '*=(CORE|SYM)FILE:core file:_files' \
		  '*=EXECFILE:executable:_files \*\(\*\)' \
		  '*=TTY:terminal device:compadd /dev/tty\*' && return 0

if compset -P '-(cd|directory)='; then
  _files -/
elif compset -P '-tty='; then
  _wanted devices expl 'terminal device' && compadd "$expl[@]" - /dev/tty*
elif compset -P '-(exec|se)='; then
  _description expl executable
  _files "$expl[@]" -g '*(*)'
elif compset -P '-(symbols|core|command)='; then
  _files
elif [[ "$PREFIX" = -* ]]; then
  if _wanted options expl option; then
    compadd "$expl[@]" -QS '' - -symbols\= -exec\= -se\= -core\= -command\= \
                                -directory\= -cd\= -tty\=
    compadd "$expl[@]"        - -help -h -s -e -c -x -d -nx -n -quiet -q \
	  		        -batch -fullname -f -b
  fi
else
  prev="$words[CURRENT-1]"

  case "$prev" in
  (-d)     _files -/ && return 0 ;;
  (-[csx]) _files && return 0 ;;
  (-e)     _description expl executable
           _files "$expl[@]" -g '*(*)' && return 0 ;;
  (-b)     _wanted values expl -V expl 'baud rate' &&
               compadd "$expl[@]" 0 50 75 110 134 150 200 300 600 1200 1800 \
			          2400 4800 9600 19200 38400 57600 115200 \
			          230400 && return 0 ;;
  esac

  w=( "${(@)words[2,-1]}" )
  while [[ "$w[1]" = -* ]]; do
    [[ "$w[1]" = -[decsxb] ]] && shift 1 w
    shift 1 w
  done

  if [[ $#w -gt 1 ]]; then
    _alternative 'files:: _files' "processes:: _pids -m ${w[1]:t}"
  else
    _description expl executable
    _files "$expl[@]" -g '*(*)'
  fi
fi