Friend Class - Features

Features

  • Friendships are not corresponded – If class A is a friend of class B, class B is not automatically a friend of class A.
  • Friendships are not transitive – If class A is a friend of class B, and class B is a friend of class C, class A is not automatically a friend of class C.
  • Friendships are not inherited – A friend of class Base is not automatically a friend of class Derived and vice versa; equally if Base is a friend of another class, Derived is not automatically a friend and vice versa.
  • Access due to friendship is inherited – A friend of Derived can access the restricted members of Derived that were inherited from Base. Note though that a friend of Derived only has access to members inherited from Base to which Derived has access itself, e.g. if Derived inherits publicly from Base, Derived only has access to the protected (and public) members inherited from Base, not the private members, so neither does a friend.

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