spec or

[wactbprot]

• https://clojure.org/guides/spec

(s/def ::name-or-id (s/or :name string?
                          :id   int?))
(s/valid? ::name-or-id "abc") ;; true
(s/valid? ::name-or-id 100) ;; true
(s/valid? ::name-or-id :foo) ;; false