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Problem with linkage of static array class members

Discussion in 'C' started by simono, Jun 3, 2008.

  1. simono

    simono New Member

    Apr 7, 2008
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    template <int I>
    class Class
    static int Data;
    void Set(const int V) { Data[0] = V; };

    void main ( )
    Class<10> c;

    The above code won't link under MS C++ V.8 :-

    1>ArrayTest.obj : error LNK2020: unresolved token (0A0002D2) "private: static int * Class<10>:: Data" (?Data@?$Class@$09@@0PAHA)
    1>ArrayTest.obj : error LNK2001: unresolved external symbol "private: static int * Class<10>:: Data" (?Data@?$Class@$09@@0PAHA)

    How do I persuade the system to create one copy
    of each version of "Data" for each of the possible
    client template arguments?

    It would also be useful for "Data" to be const static and initialised
    once. How?

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