Yes, you can definitely use = default for such destructors. Especially if you were just going to replace it with {}. I think the = default one is nicer, because it’s more explicit, so it immediately catches the eye and leaves no room for doubt. However, here are a couple of notes to take into … Read more
It’s wrong to say that a compiler-generated default constructor takes no action. It is equivalent to a user-defined constructor with an empty body and an empty initializer list, but that doesn’t mean it takes no action. Here is what it does: It calls the base class’es default constructor. It initializes the vtable pointer, if the … Read more
Since PPMM is a long-lived object (singleton), then this code doesn’t make much sense. The problem here is that as long as that event handler is referencing the object, it will not be eligible for garbage collection, as least as long as that other object that owns the event is alive. As such, putting anything … Read more
Terminology, terminology… OK, what do we mean by “Foo is inherited”? We mean that if objects of class A have Foo in its interface, then objects of class B which is a subclass of A also have Foo in its interface. Constructors aren’t a part of objects’ interface. They belong directly to classes. Classes A … Read more
JavaScript uses garbage collection to automatically delete objects when they are no longer referenced. There is no concept of destructors or finalizers. You can’t observe when an object is deleted by the garbage collector, nor is it predictable.
Within each category of storage classes (except dynamically allocated objects), objects are destructed in the reverse order of construction.
Temporary objects are destroyed at the end of the full expression they’re part of. A full expression is an expression that isn’t a sub-expression of some other expression. Usually this means it ends at the ; (or ) for if, while, switch etc.) denoting the end of the statement. In your example, it’s the end … Read more
It will do the same thing (nothing, in essence). But it’s not the same as if you didn’t write it. Because writing the destructor will require a working base-class destructor. If the base class destructor is private or if there is any other reason it can’t be invoked, then your program is faulty. Consider this … Read more
In the following text, I will distinguish between scoped objects, whose time of destruction is statically determined by their enclosing scope (functions, blocks, classes, expressions), and dynamic objects, whose exact time of destruction is generally not known until runtime. While the destruction semantics of class objects are determined by destructors, the destruction of a scalar … Read more
Defining the body of the constructor INSIDE the class has the same effect as placing the function OUTSIDE the class with the “inline” keyword. In both cases it’s a hint to the compiler. An “inline” function doesn’t necessarily mean the function will be inlined. That depends on the complexity of the function and other rules.