clojure.core/ancestors

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Type: function Added: Clojure 1.0 Examples: 3 Runnable: 1

([tag] [h tag])

Returns the immediate and indirect parents of tag, either via a Java type inheritance relationship or a relationship established via derive. h must be a hierarchy obtained from make-hierarchy, if not supplied defaults to the global hierarchy

Examples

by shockbob on 2011-08-21 ▶

;; make up a hierarchy a beagle is a sporting breed is a dog is a quadraped is an ;; animal (derive ::quadruped ::animal) nil (derive ::dog ::quadruped) nil (derive ::sporting_breed ::dog) nil (derive ::beagle ::sporting_breed) nil (ancestors ::beagle) #{:user/dog :user/sporting_breed :user/animal :user/quadruped}

by shockbob on 2011-08-21 . May have evaluation errors. ▶

;; use ancestors to show which classes ArrayList derives from and which ;; interfaces it implements (ancestors java.util.ArrayList) #{java.util.Collection java.util.AbstractList java.io.Serializable java.lang.Cloneable java.util.List java.lang.Object java.util.AbstractCollection java.util.RandomAccess java.lang.Iterable}

by berczeck on 2020-08-23 . May have evaluation errors. ▶

;; use ancestors in defrecords to show which defprotocols implements (defprotocol Fly (fly [this])) (defrecord Bird [name] Fly (fly [this] (str (:name this) " flies...."))) (ancestors Bird) ;; #{clojure.lang.IPersistentCollection ;; user.Fly ;; clojure.lang.IHashEq clojure.lang.ILookup ;; java.util.Map java.lang.Iterable ;; java.io.Serializable ;; java.lang.Object ;; clojure.lang.IMeta ;; clojure.lang.Seqable ;; clojure.lang.IRecord ;; clojure.lang.IObj ;; clojure.lang.Associative ;; clojure.lang.Counted ;; clojure.lang.IKeywordLookup ;; clojure.lang.IPersistentMap}

See also

• clojure.core/parents (1)
• clojure.core/derive (3)
• clojure.core/underive
• clojure.core/descendants (1)
• clojure.core/make-hierarchy (0)
• clojure.core/isa? (2)
• clojure.core/supers (0)

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