CUDA kernel as member function of a class

I am using CUDA 5.0 and a Compute Capability 2.1 card.

The question is quite straightforward: Can a kernel be part of a class? For example:

class Foo
{
private:
 //...
public:
 __global__ void kernel();
};

__global__ void Foo::kernel()
{
 //implementation here
}

If not then the solution is to make a wrapper function that is member of the class and calls the kernel internally?

And if yes, then will it have access to the private attributes as a normal private function?

(I'm not just trying it and see what happens because my project has several other errors right now and also I think it's a good reference question. It was difficult for me to find reference for using CUDA with C++. Basic functionality examples can be found but not strategies for structured code.)