Re: "${assoc[@]@k}" doesn't get expanded to separate words within compound assignment syntax

[Zachary Santer]

On Wed, Mar 20, 2024 at 9:32 AM Lawrence Velázquez <vq@larryv.me> wrote:
>
> https://lists.gnu.org/archive/html/bug-bash/2019-07/msg00056.html

Wherein he shows that Zsh can do this without eval:

> declare -a array=( a 1 b 2 c 3 )
> declare -A hash=( ${array[@]} )
> declare -p hash
> => typeset -A hash=( [a]=1 [b]=2 [c]=3 )
> declare -a array2=( ${(kv)hash[@]} )
> declare -p array2
> ==> typeset -a array2=( a 1 b 2 c 3 )

and then uses eval in his examples of how Bash could incorporate
similar behavior:

> array=( val1 "val2*[special-chars]" )
> printf -v serialized "%q " "${array[@]}"
> eval "deserialized=($serialized)"

> declare-A hash=( [key1]=val1 ['key2*[special-chars]']=val2 )
> printf -v serialized "%q " "${*hash[@]}"
> typeset -A deserialized_hash
> eval "deserialized_hash=($serialized)"

I don't get it.