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parents

clojure.core

  • (parents tag)
  • (parents h tag)
Returns the immediate 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

1 Example top

  • ;; simple example showing single parented derivation
    ;; then adding another parent
    
    user=> (derive ::toy_poodle ::poodle)
    nil
    user=> (parents ::toy_poodle)
    #{:user/poodle}
    user=> (derive ::toy_poodle ::toy_dogs)
    nil
    user=> (parents ::toy_poodle)
    #{:user/poodle :user/toy_dogs}
    user=>
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Plus_12x12 Minus_12x12 Source clojure/core.clj:4888 top

(defn parents
  "Returns the immediate 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"
  {:added "1.0"}
  ([tag] (parents global-hierarchy tag))
  ([h tag] (not-empty
            (let [tp (get (:parents h) tag)]
              (if (class? tag)
                (into1 (set (bases tag)) tp)
                tp)))))
Vars in clojure.core/parents:
Used in 0 other vars

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