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#autoload

# Usage:
#  _complete_opts H '' f '_files'

emulate -L zsh
setopt extendedglob

local done=yes

typeset -A option_pairs
option_pairs=("$@")
typeset -a no_arg with_arg opt_arg
no_arg=($option_pairs[(I)?])
opt_arg=($option_pairs[(I)?::]:s/:://)
with_arg=($option_pairs[(I)?:]:s/:// $opt_arg)

case "${#no_arg}-${#with_arg}" in
  0-0)
    if [[ x$PREFIX = x-* ]]; then
      compadd -nQ - "$PREFIX$SUFFIX"
    else
      done=''
    fi
    ;;

  0-*)
    if [[ x$PREFIX = x- ]]; then
      IPREFIX="$IPREFIX$PREFIX"
      PREFIX=
      compadd $with_arg
    elif [[ x$PREFIX = x-[${(j::)with_arg}] ]]; then
      IPREFIX="$IPREFIX$PREFIX"
      PREFIX=
      eval $option_pairs[$IPREFIX[-1]:]
    elif [[ x$PREFIX = x-[${(j::)with_arg}]* ]]; then
      local p="$PREFIX[1,(r)[${(j::)with_arg}]]"
      IPREFIX="$IPREFIX$p"
      PREFIX="$PREFIX[$#p + 1,-1]"
      eval $option_pairs[$IPREFIX[-1]:]
    elif [[ x$words[$CURRENT-1] = x-[${(j::)with_arg}] ]]; then
      local p="$words[$CURRENT - 1]"
      eval $option_pairs[$p[-1]:]
    else
      done=''
    fi
    ;;

  *-0)
    if [[ x$PREFIX = x-[${(j::)no_arg}]# ]]; then
      IPREFIX="$IPREFIX$PREFIX"
      PREFIX=
      compadd $no_arg
    else
      done=''
    fi
    ;;

  *-*)
    if [[ x$PREFIX = x-[${(j::)no_arg}]# ]]; then
      IPREFIX="$IPREFIX$PREFIX"
      PREFIX=
      compadd $no_arg
      compadd $with_arg
    elif [[ x$PREFIX = x-[${(j::)no_arg}]#[${(j::)with_arg}] ]]; then
      IPREFIX="$IPREFIX$PREFIX"
      PREFIX=
      eval $option_pairs[$IPREFIX[-1]:]
    elif [[ x$PREFIX = x-[${(j::)no_arg}]#[${(j::)with_arg}]* ]]; then
      local p="$PREFIX[1,(r)[${(j::)with_arg}]]"
      IPREFIX="$IPREFIX$p"
      PREFIX="$PREFIX[$#p + 1,-1]"
      eval $option_pairs[$IPREFIX[-1]:]
    elif [[ x$words[$CURRENT-1] = x-[${(j::)no_arg}]#[${(j::)with_arg}] ]]; then
      local p="$words[$CURRENT - 1]"
      eval $option_pairs[$p[-1]:]
    else
      done=''
    fi
    ;;
esac

if [[ -z "$done" ]]; then
  if (( $+complete_opts_verbose )); then
    compadd - -${(k)^option_pairs:gs/://}
  fi
  false
else
  true
fi