Thread: Including problems...

Hi, I have one simple(?) question about conflicts in including files. I use C++ Builder but actually I use it as C cause I know it better

So, the cause of the problem is...

--- map.h ---

Code:

#include "organism.h"

struct Map {
   std::vector<Organism> guy_v;

  Map();
  ~Map();
};

--- organism.h ---

Code:

struct Organism {
   std::vector<Map>::iterator mapi;
};

So...organism.h is included first to define type Organism and then type Map is defined. So, Map needs to be defined/declared before Organism and Organism needs to be defined/declared before Map.

What is the trivial way to include files without files depending on each others like that? Thx

Maybe I could find some way alone but I think it would have problems that I didn't think of...oh and I know about externs

What you try to do is just not possible. Not even in a single file. Map needs to know the full declaration of Organism and Organism needs to know the full declaration of Map. In such a case forward declarations don't help either.
Kurt

EDIT: Tested it and it does work. I'm not shure why.
just put a forward declaration of Map into organism.h

Code:

struct Map ;

struct Organism {
    std::vector<Map>::iterator mapi;
};

just put a forward declaration of Map into organism.h

Aah, yeah, I tried similar case earlier but it failed for me because I got an error "'guy_v' is not a member of Map, because the type is not yet defined" when I used watch to see the value of 'guy_v' or any other member.

That sounds like little bit funny since I thought that Map IS defined anyway after compiling I can make a Map object and output values of members but couldn't for example permanently reserve() 'guy_v' vector in Map()...it worked when I did it after object was constructed