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zsh/Functions/Zle/kill-word-match

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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