Compiler Error C2681
Visual Studio .NET 2003
'type' : invalid expression type for name
A casting operator tried to convert from an invalid type. For example, if you use the dynamic_cast operator to convert an expression to a pointer type, the source expression must be a pointer.
Example
// C2681.cpp
class A { virtual void f(); };
void g(int i)
{
A* pa;
pa = dynamic_cast<A*>(i); // C2681
}