Function bash_assignment_string 

pub fn bash_assignment_string(
    name: &str,
    attrs: &str,
    shape: &BashParamShape<'_>,
) -> String

bash ${var@A} — the assignment statement that would recreate the parameter with its attributes.

attrs is the attribute-letter string bash_attr_letters produces; an empty one means bash omits the declare word entirely.

$ bash -c 'v=abc;          printf "<%s>" "${v@A}"'    → <v='abc'>
$ bash -c 'declare -i n=5; printf "<%s>" "${n@A}"'    → <declare -i n='5'>
$ bash -c 'a=(x "y z");    printf "<%s>" "${a[*]@A}"' → <declare -a a=([0]="x" [1]="y z")>
$ bash -c 'declare -A h=([q]=1); printf "<%s>" "${h[*]@A}"'
                                                      → <declare -A h=([q]="1" )>