A union is a special class type that can hold only one of its non-static

Besides function-call expressions, where

Elaborated type specifiers may be used to refer to a previously-declared class name (class, struct, or union) or to a previously-declared enum name even if the name was hidden

Initializes an object from braced-init-list. Syntax direct-list-initialization

Sets the initial values of the static constants. Syntax

A function declaration introduces the function name and its type. A function definition associates the function name/type with the function body.

A move constructor of class T is a non-template constructor whose first parameter is T&&, const T&&, volatile T&&

Creates and initializes objects with dynamic storage

Each name that appears in a C++ program

Constructor is a special non-static member