Other containers

The Vector and HashTable types behave very similarly to Cons, with read-only variants of their own.

(et-subtype? (et HashTable<Integer_Integer>) (et HashTable<Number_Number>))
;; -> nil
(et-subtype? (et &HashTable<Integer_Integer>) (et &HashTable<Number_Number>))
;; -> t
(et-subtype? (et Vector<Integer>) (et Vector<Number>))
;; -> nil
(et-subtype? (et &Vector<Integer>) (et &Vector<Number>))
;; -> t