> This seems like a crazy guarantee to put in the standard It’s a great and useful guarantee. > it must really limit the kinds of hash tables you can make tha

> This seems like a crazy guarantee to put in the standard It’s a great and useful guarantee. > it must really limit the kinds of hash tables you can make that matches the unordered_map interface. Many libraries treat containers as “abstract” with many possible implementations. STL explicitly does not. It’s a specific data structure from a computer science class.