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     Compiler error C2258
 
     illegal pure syntax, must be '= 0'
 
     A pure virtual function was declared with incorrect syntax.
 
     The following is an example of this error:
 
          class A
          {
          public:
             void virtual func1() = 1; // error, not = 0
             void virtual func2() = 0; // OK
          };
                                    -♦-