How to list all the manifest constants in a class or struct

[Heromyth]

Here is a struct named S:

struct S
{
	enum X = 10;
	enum Y
	{
	  i = 10
	}
	enum Z = "str";
	struct S {}
	class C {}

	static int sx = 0;
	__gshared int gx = 0;

         shared void g();	
}

I want list all then the manifest constants in it.

I searched the std.traits and this forums, but get nothing.
Maybe, my real question is how to get the storage class for a 
member in a class or struct.

Thanks.