CCN5193 exception

When you specify a friend within a class, you must use the class name instead of the type-definition name. Without modification, the code in Figure 1 would result in the following error message:

CCN5193: A typedef name cannot be used in this context

Figure 1. Example: Correcting a type-definition name used out of context

    class A { };
    typedef A B;
    class C {
        friend class B;    1 
    };

Note: Do not use the type-definition name; instead, use the name of the class:

friend class A;