#autoload

setopt localoptions extendedglob

if compvalues -i "$@"; then

  local noargs args opts descr action expl sep

  if ! compvalues -D descr action; then
    compvalues -V noargs args opts

    if [[ "$PREFIX" = *\=* ]]; then
      local name

      name="${PREFIX%%\=*}"
      if compvalues -L "$name" descr action; then
        IPREFIX="${IPREFIX}${name}="
        PREFIX="${PREFIX#*\=}"
      else
        local prefix suffix

	prefix="${PREFIX#*\=}"
	suffix="$SUFFIX"
	PREFIX="$name"
	SUFFIX=''
	args=( "$args[@]" "$opts[@]" )
	compadd -M 'r:|[_-]=* r:|=*' -D args - "${(@)args[@]%%:*}"

	[[ $#args -ne 1 ]] && return 1

        PREFIX="$prefix"
	SUFFIX="$suffix"
        IPREFIX="${IPREFIX}${args[1]%%:*}="
	compvalues -L "${args[1]%%:*}" descr action
      fi
    else
      compvalues -d descr
      if [[ ${#noargs}+${#args}+${#opts} -ne 1 ]] && compvalues -s sep; then
        sep=( "-qQS$sep" )
      else
        sep=()
      fi

      _describe "$descr" \
        noargs "$sep[@]" -M 'r:|[_-]=* r:|=*' -- \
        args -S= -M 'r:|[_-]=* r:|=*' -- \
        opts -qS= -M 'r:|[_-]=* r:|=*'

      return
    fi
  fi

  _description expl "$descr"

  # We add the separator character as a autoremovable suffix unless
  # we have only one possible value left.

  [[ ${#snames}+${#names}+${#onames} -ne 1 ]] && compvalues -s sep &&
      expl=( "-qS$sep" "$expl[@]" )

  if [[ "$action" = -\>* ]]; then
    compvalues -v val_args
    state="${${action[3,-1]##[ 	]#}%%[ 	]#}"
    compstate[restore]=''
    return 1
  else
    typeset -A val_args

    compvalues -v val_args

    if [[ "$action" = \ # ]]; then

      # An empty action means that we should just display a message.

      _message "$descr"
      return 1

    elif [[ "$action" = \(\(*\)\) ]]; then
      local ws

      # ((...)) contains literal strings with descriptions.

      eval ws\=\( "${action[3,-3]}" \)

      _describe "$descr" ws -M 'r:|[_-]=* r:|=*'

    elif [[ "$action" = \(*\) ]]; then

      # Anything inside `(...)' is added directly.

      compadd "$expl[@]" - ${=action[2,-2]}
    elif [[ "$action" = \{*\} ]]; then

      # A string in braces is evaluated.

      eval "$action[2,-2]"

    elif [[ "$action" = \ * ]]; then

      # If the action starts with a space, we just call it.

      ${(e)=~action}
    else

      # Otherwise we call it with the description-arguments built above.

      action=( $=action )
      ${(e)action[1]} "$expl[@]" ${(e)~action[2,-1]}
    fi
  fi

  [[ nm -ne "$compstate[nmatches]" ]]
  return

else
  return 1;
fi