A class-name is inserted into the scope in which it is declared 
immediately after the class-name is seen. The class-name is also inserted
into  the scope of the class itself. For purposes of access checking,
the inserted class name is treated as if it were a public member name.
A  class-specifier is commonly referred to as a class definition. A
class is considered defined after the closing brace of its class-specifier
has  been  seen even though its member functions are in general
not yet defined.