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#compdef compdef

local state line expl list disp curcontext="$curcontext"
typeset -A opt_args

_arguments -C -s -A "-*" -S \
  '(-d)-a[make function autoloadable]' \
  '(-d -p -P)-n[leave existing definitions intact]' \
  "*-T[select type of completion function]:completion function type:($_comp_assocs)" \
  ':completion function:->cfun' \
  '*:commands: _command_names' \
 - d \
  '(-a -n)-d[delete]:*:completed command:->ccom' \
 - p \
  '(-n)-p[completion for command matching pattern]:completion function:->cfun:pattern' \
 - P \
  '(-n)-P[as -p for commands without own completion]:completion function:->cfun:pattern' \
 - k \
  '-k[define widget and key binding]:completion function:->cfun:style:->style:*:key' \
 - K \
  '-K[define multiple widgets based on function]:*::: :->multi' && return 0

if [[ $state = multi ]]; then
  case $(( CURRENT % 3 )) in
  0) _message key
     return 1;;
  1) state=cfun;;
  2) state=style;;
  esac
fi

case $state in
  ccom)
    _wanted commands expl 'completed command' compadd -k _comps
  ;;
  cfun)
    list=( ${^fpath:/.}/_(|*[^~])(:t) )
    if zstyle -T ":completion:${curcontext}:functions" prefix-hidden; then
      disp=( ${list[@]#_} )
      _wanted functions expl 'completion function' \
          compadd -d disp -a list
    else
      _wanted functions expl 'completion function' compadd -a list
    fi
  ;;
  style)
    _wanted widgetstyle expl 'widget style' \
        compadd -M 'r:|-=* r:|=*' \
            complete-word delete-char-or-list expand-or-complete \
            expand-or-complete-prefix list-choices menu-complete \
            menu-expand-or-complete reverse-menu-complete
  ;;
esac