Method treeMinimum

templates/red-black-tree.cpp:329–336

    }

    RBTreeNode* treeMinimum(RBTreeNode* x)
    {
        auto p = x;
        while (p->left != nil) {
            p = p->left;
        }
        return p;
    }

    void deleteInternal(RBTreeNode* z)
    {