C++ has had duck typing since it had generics. Here would be an example of the first case : https://wandbox.org/permlink/AIgZtkFgTuiQReDT https://wandbox.org/p

C++ has had duck typing since it had generics. Here would be an example of the first case : https://wandbox.org/permlink/AIgZtkFgTuiQReDT https://wandbox.org/permlink/AIgZtkFgTuiQReDT