Readded description of BPTree

src/pbptrees/BPTree.hpp

@@ -35,6 +35,14 @@
 #endif
 
 namespace dbis::pbptrees {
+/**
+ * An in-memory implementation of a B+ tree.
+ *
+ * @tparam KeyType the data type of the key
+ * @tparam ValueType the data type of the values associated with the key
+ * @tparam N the maximum number of keys on a branch node
+ * @tparam M the maximum number of keys on a leaf node
+ */
 template <typename KeyType, typename ValueType, int N, int M, int NODE_ALIGNMENT = 64>
 class BPTree {
   // we need at least two keys on a branch node to be able to split