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      clojure.spec.alpha

      • (& re & preds)
      takes a regex op re, and predicates. Returns a regex-op that consumes
input as per re but subjects the resulting value to the
conjunction of the predicates, and any conforming they might perform.
      © Rich Hickey. All rights reserved. Eclipse Public License 1.0
      1 Example
      (require '[clojure.spec.alpha :as s])

(s/conform
  (s/cat :tag keyword? :children (s/& (s/+ integer?) #(-> % count (>= 2))))
  [:a 3])
;=> :clojure.spec.alpha/invalid
(s/conform
  (s/cat :tag keyword? :children (s/& (s/+ integer?) #(-> % count (>= 2))))
  [:a 3 4 5])
;=> {:tag :a, :children [3 4 5]}
      See Also
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