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Compiler Error C2676
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Compiler Error C2676

binary 'operator' : 'type' does not define this operator or a conversion to a type acceptable to the predefined operator

To use the operator, you must overload it for the specified type or define a conversion to a type for which the operator is defined.

The following sample generates C2676.

// C2676.cpp
// C2676 expected
struct C {
   C();
} c;

struct D {
   D();
   D operator >>( C& ){return * new D;}
   D operator <<( C& ){return * new D;}
} d;

struct E {
   // operator int();
};

int main() {
   d >> c;
   d << c;
   E e1, e2;
   e1 == e2;   // uncomment operator int in class E, then
               // it is OK even though neither E::operator==(E) nor 
               // operator==(E, E) defined. Uses the conversion to int 
               // and then the builtin-operator==(int, int)
}

C2676 can also occur if you attempt to do pointer arithmetic on the this pointer of a reference type.

The this pointer is of type handle in a reference type. For more information, see Semantics of the this Pointer in Value and Reference Types.

The following sample generates C2676.

// C2676_a.cpp
// compile with: /clr
using namespace System;

ref struct A {
   property Double default[Double] {
      Double get(Double data) {
         return data*data;
      }
   }

   A() {
      Console::WriteLine("{0}", this + 3.3);   // C2676
      Console::WriteLine("{0}", this[3.3]);   // OK
   }
};

int main() {
   A ^ mya = gcnew A();
}

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