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
Most vexing parse This is related to what is known as “C++’s most vexing parse”. Basically, anything that can be interpreted by the compiler as a function declaration will be interpreted as a function declaration. Another instance of the same problem: std::ifstream ifs(“file.txt”); std::vector<T> v(std::istream_iterator<T>(ifs), std::istream_iterator<T>()); v is interpreted as a declaration of function with … Read more
This is a completely different question when asking about constructors than destructors. If your destructor is virtual, then the difference is negligible, as Howard pointed out. However, if your destructor was non-virtual, it’s a completely different story. The same is true of constructors. Using = default syntax for special member functions (default constructor, copy/move constructors/assignment, … Read more