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Compiler Error C2680

Error Message

'type' : invalid target type for name

A casting operator tried to convert to a type that is not a pointer or reference. The dynamic_cast operator can be used only for pointers or references.

The following sample generates C2680:

// C2680.cpp
// compile with: /c
class A { virtual void f(); };
class B : public A {};

void g(B b) {
   A a;
   a = dynamic_cast<A>(b);   // C2680  target not a reference type
   a = dynamic_cast<A&>(b);   // OK
}

C2680 can also occur when the target is not defined:

// C2680b.cpp
// compile with: /clr /c
// C2680 expected
using namespace System::Collections;

// Delete the following line to resolve.
ref class A;   // not defined

// Uncomment the following line to resolve.
// ref class A{};

public ref class B : ArrayList {
   property A^ C[int] {
      A^ get(int index) {
         return dynamic_cast<A^>(this->default::get(index));
      }
      void set(int index, A^ value) {
         this->default::set(index, value); 
      }
   }
};

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