Re: A defer command as a bash loadable builtin

>
> I implemented defer as a bash loadable builtin.
>
> It is a wrapper over the trap builtin that chains handlers on signals 
> instead of replacing them (LIFO order):
>
> https://github.com/leagris/bash-loadable-defer
>

Is this better than

trap_append () { trap "$(printf "%s\n$1" "$(trap -P "$2")")" "$2"; }
trap_prepend () { trap "$(printf "$1\n%s" "$(trap -P "$2")")" "$2"; }

?