Function: CLONE-BACKTRACKS

Documentation

BACKTRACKS is a list of backtrack objects, we create a new list of backtracks with the same getter, setter and value but a new copy of value.

Source

(defun clone-backtracks (backtracks)
  "BACKTRACKS is a list of backtrack objects, we create a new list of
  backtracks with the same getter, setter and value but a new copy of
  value."
  (copy-tree backtracks))