I want to specify in clojure spec that only declared keywords are permitted
in function calls.
This is to catch what are usually mis-spelled or mis-cased keywors passed
via option maps in function calls.
In the fdefs below, the second fdef will catch an invalid call, e.g.
(f 1 {:a 2 :B 3})
but the first fdef will not.
Is there an easier way to specify the more restrictive spec without having
to add my own 'every' and enumeration of the keys?
(or build my own version of s/keys that does this automatically, which I'm
guessing is the answer).
(require '[clojure.spec :as s])
(require '[clojure.spec.test :as stest])
(s/def ::x (fn [x] true)) ;for lack of any?
;; Will not catch invalid keywords
(s/fdef f
:args (s/cat :x ::x
:options (s/keys :opt-un [::a ::b]))
:ret nil?)
;; Will catch invalid keywords, but is there an easier way?
(s/fdef f
:args (s/cat :x ::x
:options (s/and (s/keys :opt-un [::a ::b])
#(every? #{:a :b} (keys %))))
:ret nil?)
(defn f [x {:keys [a b]}])
(stest/instrument `f)
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