Compiler Warning (level 4) C4610

 

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The latest version of this topic can be found at 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:

// C4610.cpp  
// compile with: /W4  
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;  
*/  
  
int main() {  
}  

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