nested class as friend

This is a discussion on nested class as friend within the C++ Programming forums, part of the General Programming Boards category; class Outer { class Inner { ... } }; class Other { ... friend class Outer; // OK friend class ...

  1. #1
    Registered User
    Join Date
    Sep 2002
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    1

    nested class as friend

    class Outer
    {
    class Inner
    {
    ...
    }
    };

    class Other
    {
    ...
    friend class Outer; // OK
    friend class Outer::Inner; // Wrongo (Inner not visible in Other scope as a type within Outer.)
    };

    How in C++ can class Inner also be made friend of class Other? Perhaps friendship should automatically be extended to nested classes of outer class??

  2. #2
    Registered User
    Join Date
    Dec 2001
    Posts
    108
    Using bcc32 this skeletal code compiled without error..

    Code:
    class Outer {
      class Inner {
        //...
      };
    };
    
    class Other {
      //...
      friend class Outer;
      friend class Outer::Inner;
    };
    Don't understand the problem your having

  3. #3
    Registered User matheo917's Avatar
    Join Date
    Sep 2001
    Posts
    279
    in C++ "friendship" is not shared, just b/c you declare Outer to be a friend of an Inner it doesn't mean that automaticly Inner is a friend of outer, it's a bit confusing and totally different when it comes to real world human friendship....

    what you need to do is: inside the body of Inner declare Outer to it's friend and in the body of Inner declare Outer to be a friend of Inner..

    Remember: "friendship" in C++ is not shared, nor inherited, nor it is nested.....

    hope this helps...

    matheo917

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