tree-equal tree-1 tree-2 &key test test-not => generalized-boolean
Arguments and Values:
test---a designator for a function of two arguments that returns a generalized boolean.
test-not---a designator for a function of two arguments that returns a generalized boolean.
generalized-boolean---a generalized boolean.
tree-equal tests whether two trees are of the same shape and have the same leaves. tree-equal returns true if tree-1 and tree-2 are both atoms and satisfy the test, or if they are both conses and the car of tree-1 is tree-equal to the car of tree-2 and the cdr of tree-1 is tree-equal to the cdr of tree-2. Otherwise, tree-equal returns false.
tree-equal recursively compares conses but not any other objects that have components.
The first argument to the :test or :test-not function is tree-1 or a car or cdr of tree-1; the second argument is tree-2 or a car or cdr of tree-2.
(setq tree1 '(1 (1 2)) tree2 '(1 (1 2))) => (1 (1 2)) (tree-equal tree1 tree2) => true (eql tree1 tree2) => false (setq tree1 '('a ('b 'c)) tree2 '('a ('b 'c))) => ('a ('b 'c)) => ((QUOTE A) ((QUOTE B) (QUOTE C))) (tree-equal tree1 tree2 :test 'eq) => true
Side Effects: None.
Affected By: None.
The consequences are undefined if both tree-1 and tree-2 are circular.
equal, Section 3.6 (Traversal Rules and Side Effects)
The :test-not parameter is deprecated.