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Compiler Warning (level 4) C4610

object 'class' can never be instantiated - user-defined constructor required

The class has no user-defined or default constructors. No instantiation is performed. The following sample generates C4610:

struct A {
   int &j;

   A& A::operator=( const A& );
};   // C4610

/* use this structure definition to resolve the warning
struct B {
   int &k;

   B(int i = 0) : k(i) {
   }

   B& B::operator=( const B& );
} b;
*/

void main() {
}