cljs.spec.alpha/def

macro

previously cljs.spec/def

clojure.spec.alpha/def

Edit

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Source docstring:

Given a namespace-qualified keyword or resolveable symbol k, and a
spec, spec-name, predicate or regex-op makes an entry in the
registry mapping k to the spec. Use nil to remove an entry in
the registry for k.

(defmacro def
  [k spec-form]
  (let [k    (if (symbol? k)
               (let [sym (ns-qualify &env k)]
                 (swap! _speced_vars conj
                   (vary-meta sym assoc :fdef-ns (-> &env :ns :name)))
                 sym)
               k)
        form (res &env spec-form)]
    (swap! registry-ref (fn [r]
                          (if (nil? form)
                            (dissoc r k)
                            (assoc r k form))))
    `(def-impl '~k '~form ~spec-form)))

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