![]() ![]() (although it is probably more convenient than other approaches). Using initialization lists to initialize fields is not always necessary works as long as T has a copy constructor Ways of handling initializing fields of the templated type for the case of This behavior allows you to specify templates where the templated type can beĮither a class or a primitive type (otherwise, you would have to have different Quux() : _my_int( 5 ) // sets _my_int to 5 When the field isĪ primitive type, giving it an argument is equivalent to assignment. Types (objects of classes) and primitive types (e.g., int). It turns out that initialization lists work to initialize both user-defined That is, the compiler knows which foo belongs to the object, and which foo Moreover,Īll of these constructors are called before the class's own constructor is ![]() By default, theĬonstructors invoked are the default ("no-argument") constructors. In C++, whenever an object of a class is created, its constructor is called.īut that's not all-its parent class constructor is called, as are theĬonstructors for all objects that belong to the class. Understanding Initialization Lists in C++ Understanding the Start of an Object's Lifetime ![]()
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