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(.using
 [library
  [lux (.except list)
   ["$" documentation (.only documentation:)]
   [control
    ["<>" parser (.only)
     ["<[0]>" code]]]
   [data
    ["[0]" text (.only \n)
     ["%" \\format (.only format)]]]
   [macro
    ["[0]" template]]]]
 [\\library
  ["[0]" /]]
 ["[0]" /
  ["[1][0]" finger]
  ["[1][0]" zipper]])

(documentation: (/.Tree it)
  "A generic tree data-structure.")

(documentation: /.flat
  "All the leaf values of the tree, in order."
  [(flat tree)])

(documentation: /.leaf
  ""
  [(leaf value)])

(documentation: /.branch
  ""
  [(branch value children)])

(documentation: /.tree
  "Tree literals."
  [(is (Tree Nat)
       (tree 12
             {34 {}
                 56 {}
                 78 {90 {}}}))])

(.def: .public documentation
  (.List $.Module)
  ($.module /._
            ""
            [..Tree
             ..flat
             ..leaf
             ..branch
             ..tree
             ($.default /.equivalence)
             ($.default /.functor)
             ($.default /.mix)]
            [/finger.documentation
             /zipper.documentation]))