Class member lists (C++ only)

Class member list syntax

   .-------------------------------------------------------.   
   V                                                       |   
>>---+-member_declaration--+------------------------+--;-+-+---><
     |                     +-=--0-------------------+    |     
     |                     '-=--constant_expression-'    |     
     +-member_definition---------------------------------+     
     '-access_specifier--:-------------------------------'     

The member list follows the class name and is placed between braces. The following applies to member lists, and members of member lists:

• A member_declaration or a member_definition may be a declaration or definition of a data member, member function, nested type, or enumeration. (The enumerators of a enumeration defined in a class member list are also members of the class.)
• A member list is the only place where you can declare class members.
• Friend declarations are not class members but must appear in member lists.
• The member list in a class definition declares all the members of a class; you cannot add members elsewhere.
• You cannot declare a member twice in a member list.
• You may declare a data member or member function as static but not auto, extern, or register.
• You may declare a nested class, a member class template, or a member function, and define it outside the class.
• You must define static data members outside the class.
• Nonstatic members that are class objects must be objects of previously defined classes; a class A cannot contain an object of class A, but it can contain a pointer or reference to an object of class A.
• You must specify all dimensions of a nonstatic array member.

Suppose A is a name of a class. The following class members of A must have a name different from A:

• All data members
• All type members
• All enumerators of enumerated type members
• All members of all anonymous union members