(ancestors tag) (ancestors 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
;; make up a hierarchy a beagle is a sporting breed is a dog is a quadraped is an
;; animal
user=> (derive ::quadruped ::animal)
nil
user=> (derive ::dog ::quadruped)
nil
user=> (derive ::sporting_breed ::dog)
nil
user=> (derive ::beagle ::sporting_breed)
nil
user=> (ancestors ::beagle)
#{:user/dog :user/sporting_breed :user/animal :user/quadruped}
user=>
;; use ancestors to show which classes ArrayList derives from and which
;; interfaces it implements
user=> (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}
user=>