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zsh/Completion/Base/Completer/_all_matches

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#autoload
_all_matches() {
local old
zstyle -s ":completion:${curcontext}:" old-matches old
if [[ "$old" = (only|true|yes|1|on) ]]; then
if [[ -n "$compstate[old_list]" ]]; then
compstate[insert]=all
compstate[old_list]=keep
return 0
fi
[[ "$old" = *only* ]] && return 1
fi
(( $comppostfuncs[(I)_all_matches_end] )) ||
comppostfuncs=( "$comppostfuncs[@]" _all_matches_end )
_all_matches_context=":completion:${curcontext}:"
return 1
}
_all_matches_end() {
local not
zstyle -s "$_all_matches_context" avoid-completer not ||
not=( _expand _old_list _correct _approximate )
if [[ "$compstate[nmatches]" -gt 1 && $not[(I)(|_)$_completer] -eq 0 ]]; then
local expl
if zstyle -t "$_all_matches_context" insert; then
compstate[insert]=all
else
_description all-matches expl 'all matches'
compadd "$expl[@]" -C
fi
fi
unset _all_matches_context
}
_all_matches "$@"