Thread: simple template friend question

  1. #1
    Registered User
    Join Date
    Feb 2006

    simple template friend question

    Here is the top of my class

    template < class T >
    class TODLLNode
      friend class TODLList;
    Whenever I try to intialize anything in a test function I get the error

    todllnode.templ:16: error: template argument required for 'struct TODLList'

    What am I doing wrong?

    If it helps...

    My private variables are as follows:

    T data_;
    TODLLNode < T > * fore_;
    TODLLNode < T > * back_;

    Here is a simple initializing of a variable to get this error in my test function

    TODLLNode < int > a;
    Last edited by noodle24; 06-02-2006 at 11:40 AM.

  2. #2
    C++ Witch laserlight's Avatar
    Join Date
    Oct 2003
    Why not post the smallest and simplest piece of code that demonstrates the error?
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  3. #3
    Frequently Quite Prolix dwks's Avatar
    Join Date
    Apr 2005
    Unless I miss my guess TODLList is a template and you'll want to make
    friend class TODLList;
    friend class TODLList<T>;

    Seek and ye shall find. quaere et invenies.

    "Simplicity does not precede complexity, but follows it." -- Alan Perlis
    "Testing can only prove the presence of bugs, not their absence." -- Edsger Dijkstra
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