emulate -L zsh
setopt extendedglob

autoload match-words-by-style

local curcontext=":zle:$WIDGET" word done
local -a matched_words
integer count=${NUMERIC:-1}

if (( count < 0 )); then
    (( NUMERIC = -count ))
    zle backward-$WIDGET
    return
fi

while (( count-- )); do

    match-words-by-style

    word="${(j..)matched_words[4,5]}"

    if [[ -n $word ]]; then
	if [[ -n $done || $LASTWIDGET = *kill* ]]; then
	    CUTBUFFER="$CUTBUFFER$word"
	else
	    killring=("$CUTBUFFER" "${(@)killring[1,-2]}")
	    CUTBUFFER=$word
	fi
	RBUFFER=$matched_words[6]
    else
	return 1
    fi
    done=1
done

return 0