ref: dcee03917fb103ca72e521369053667455121a6d
dir: /lib/std/slpop.myr/
use "types"
use "alloc"
pkg std =
generic slpop : (sl : @a[:] -> (@a, @a[:]))
;;
generic slpop = {sl
var elt
elt = sl[sl.len - 1]
sl = slgrow(sl, sl.len - 1)
-> (elt, sl)
}