I\'ve encountered this code example and I remembered I\'ve seen it before and I didn\'t know what it is for and what it does? I\'ve searched on the internet but without luck.
} g_c;
Here g_c
is declared to be an object of the class type C
.
Such construct enables you to create object(s) of unnamed type as:
class //Nameless class!
{
//data members
}obj1, obj2;
In this example, obj1
and obj2
are declared to be objects of a class type which has not been given any name — the class is nameless! In such situation, you cannot declare objects in a conventional sense (i.e Type obj1, obj2;
sense). So this construct helps you do that.
You can even derive from other named classes while being nameless (and declaring the objects of the nameless class):
class : public A, public B //Nameless class is deriving from A and B
{
//data members
}obj1, obj2;
In short, this construct ensures that the user wouldn't be able to create more objects than intended, unless some evil programmer uses/misuses/abuses C++11 (or template) as:
decltype(obj1) obj3; //hehe!
Hope that helps!