multiple mixed type array to set

arr2set.bash

#!/usr/bin/env bash
BASH_COMPAT=51

# Swap or merge keys and indices
function arr2set {
	typeset -i n m
	typeset -n _ret=$1 r
	[[ ${_ret@a} == *A* ]] || return
	shift
	for r do
		set -- "${!r[@]}"
		case ${r@a} in
			*a*) (( m = $# ))
				while
					(( _ret[\${r[\${1}]}] = (n + (m - $#)) ))
					${1+\:} break
					shift
				do :
				done
				((n += m))
				;;
			*A*) eval "_ret+=(${| printf -v REPLY '[%q]=%q ' "${r[@]@k}"; } )"
		esac
	done
}

function m {
	typeset -a a=({a..c}) b=({d..f})
	typeset -A s c=([muh]=mu [moo]=muu)
	arr2set s a b c
	typeset -p s
}

m

# declare -A s=([moo]="muu" [f]="5" [e]="4" [d]="6" [c]="2" [b]="1" [a]="3" [muh]="mu" )