Forward class declarations

This should work:

namespace Space
{
   class ClassName;
}
 
#includes....
#includes....
 
namespace Space
{
   class Space
   {
      blah..
   };
} 

Yeah, I did that it just looks ugly.
In the end I think I have got around the problem.

Am I right in believing you can forward declare classes more than once??

yes you can DECLARE a class, and almost anything else which isn''t a definition, an infinite amount of times ...

also ... be carefull with forward declaring inside a namespace, that you are actually doing what you mean to do ... ie - make sure that the item in question belongs IN the namespace ...

which also means ... do not include header files within a namespace, unless you mean to wrap it up into a namespace.

ALSO important ... if you have something like a static member (class member ... not C style static) which is in a class, in a namespace ... then it''s definition must be inside that namespace as well ... which made for some REALLY weird code with a template library I wrote once ...

I had a templated class, with a static member ... inside a namespace (lets all it A). Then I specialized this template inside other libraries over particular types, and those types we''re in a namespace (we''ll call it B).

So inside each .cpp file for each of these derived types, I had a situation where I had to do basically this: