Problem

I am getting the following compilation error:

error: member access into incomplete type 'IRB'

This happens at the first line that class IRB is used, at HG.h.

Questions

• What am I missing here? Is it the typedef that is causing the issues?

• On each header file, as you can see below I forward declared the class that I am going to use.

• More importantly what is the process that I should follow to get this correct?

Header files

T.h

typedef IRBBase__<true, true> IRB_BASE;  // typedef a template instantiation

IRB.h

#include "T.h"
#include "FH.h"
class FH; // FWD DCLR
class IRB : IRB_BASE {..};

FH.h

#include "T.h"
#include "IRB.h"
#include "HG.h"
class IRB;  // FWD DCLR
class HG;   // FWD DCLR
class FH {..};

HG.h

#include "T.h"
#include "FH.h"
#include "IRB.h"
#include "CU.h"
class FH;   // FWD DCLR
class IRB;  // FWD DCLR
class CU;   // FWD DCLR
class HG {..};

CU.h

#include "T.h"
#include "IRB.h"
#include "FH.h"
class IRB;
class FH;
class CU {..};

Edit: Got it working

After user0042 suggestion, I got it working by moving headers from all files except HG.h into their respective .cc files. In HG.h I kept the forward declarations, and the header files.