1: // Created by Frank M. Carrano and Timothy M. Henry.
2: // Copyright (c) 2017 Pearson Education, Hoboken, New Jersey.
4: template<class ItemType>
5: void BinaryNodeTree<ItemType>::
6: destroyTree(std::shared_ptr<BinaryNode<ItemType>> subTreePtr)
7: {
8: if (subTreePtr != nullptr)
9: {
10: destroyTree(subTreePtr–>getLeftChildPtr());
11: destroyTree(subTreePtr–>getRightChildPtr());
12: subTreePtr.reset(); // Decrement reference count to node
13: } // end if
14: } // end destroyTree