In simple terms, if you mix types of the same rank (in the sequence of int, long int, long long int), the unsigned type “wins” and the calculations are performed within that unsigned type. The result is of the same unsigned type. If you mix types of different rank, the higher-ranked type “wins”, if it … Read more
And so, is the one shown by the example a well-defined behavior? Yes, the behaviour shown in the example is the only behaviour allowed by the standard. That is because std::move doesn’t move. The things that move are move constructors and move assignment operators. All std::move does is change an lvalue into an xvalue, so … Read more
In simple terms, if you mix types of the same rank (in the sequence of int, long int, long long int), the unsigned type “wins” and the calculations are performed within that unsigned type. The result is of the same unsigned type. If you mix types of different rank, the higher-ranked type “wins”, if it … Read more
In Python versions prior to 3.0 there are two kinds of strings “plain strings” and “unicode strings”. Plain strings (str) cannot represent characters outside of the Latin alphabet (ignoring details of code pages for simplicity). Unicode strings (unicode) can represent characters from any alphabet including some fictional ones like Klingon. So why have two kinds … Read more
Implicitly defined (by the compiler) default constructor of a class does not initialize members of built-in types. However, you have to keep in mind that in some cases the initialization of a instance of the class can be performed by other means. Not by default constructor, nor by constructor at all. For example, there’s a … Read more
You can’t directly add the method to the original type. However, you can subclass the type then substitute it in the built-in/global namespace, which achieves most of the effect desired. Unfortunately, objects created by literal syntax will continue to be of the vanilla type and won’t have your new methods/attributes. Here’s what it looks like … Read more