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#autoload

local all ret=1 end xor has_args had_args ostate ocontext oopt_args r
local nm="$compstate[nmatches]"
local opre="$PREFIX" oipre="$IPREFIX" ocur="$CURRENT"
local osuf="$SUFFIX" oisuf="$ISUFFIX" owords
local _ms_match _ms_opt _ms_soptmid _ms_soptmidadd _ms_soptend
local _ms_optnext _ms_optdirect _ms_optequal

_ms_soptmid=()
_ms_soptmidadd=()
_ms_soptend=()
_ms_optnext=()
_ms_optdirect=()
_ms_optequal=()

owords=("$words[@]")

end=$argv[(i)-]
[[ end -gt $# ]] && return 1

all=( "${(@)argv[1,end]}" )

shift end

xor=()
ostate=()
ocontext=()
oopt_args=()

while true; do
  end=$argv[(i)-]

  if [[ "$1" = \(*\) ]]; then
    _arguments -m xor "${1[2,-2]}" "$all[@]" \
               "$1${(@)^argv[2,end-1]:#\(*}" \
               "${1[1,-2]} ${(@)${(@M)^argv[2,end-1]:#\(*}#?}"
  else
    _arguments -m xor "$1" "$all[@]" "${(@)argv[2,end-1]}"
  fi
  
  r=$?

  oopt_args=( "$oopt_args[@]" "${(@kv)opt_args}" )
  if [[ r -eq 300 ]]; then
    ret=300
    ostate=( "$ostate[@]" "$state[@]" )
    ocontext=( "$ocontext[@]" "$context[@]" )
    PREFIX="$opre"   SUFFIX="$osuf"
    IPREFIX="$oipre" ISUFFIX="$oisuf"
    CURRENT="$ocur"  words=( "$owords[@]" )
  elif [[ "$r$ret" = 01 ]]; then
    ret=0
  fi
  
  [[ end -gt $# ]] && break

  shift end
done

[[ -n "$_ms_opt" ]] &&
   { ! zstyle -T ":completion:${curcontext}:options" prefix-needed ||
     [[ "$PREFIX" = [-+]* ||
     ( -z "$has_args" && ret -ne 300 && nm -eq compstate[nmatches] ) ]] } &&
  has_args=yes &&
  _describe -o option \
            _ms_soptmid _ms_soptmidadd -Q -S '' -- \
	    _ms_soptend -Q -- \
	    _ms_optnext -Q -M "$_ms_match" -- \
	    _ms_optdirect -QS '' -M "$_ms_match" -- \
	    _ms_optequal -QqS= -M "$_ms_match" && [[ ret -eq 1 ]] && ret=0

opt_args=( "$oopt_args[@]" )

if [[ ret -eq 300 ]]; then
  state=( "$ostate[@]" )
  context=( "$ocontext[@]" )
elif [[ -z "$has_args" ]]; then
  if [[ -n "$had_args" ]]; then
    _message "no more arguments"
  else
    _message "no arguments"
  fi
fi

return ret