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c++qtqlist

QList and MyClass undeclared identifier

I have weird problem with Qt 4. I'm trying to make QList of MyClass, but it says MyClass: undeclared identifier. I'm using it in global objects.. here's code and let me know what I'm doing wrong. Regards.

global_objects.h:

#ifndef GLOBAL_OBJECTS_H
#define GLOBAL_OBJECTS_H

#include <QList>
#include "myclass.h"

extern QList<MyClass*> Test; //undeclared identifier, why???

#endif // GLOBAL_OBJECTS_H

global_objects.cpp:

#include "global_objects.h"
QList <MyClass*> Test;

MyClass is empty QObject, haven't added anything yet. What's the problem ?!

Solution

  • You have a mutual inclusion problem: for your purposes, i think it is sufficient to forward-declare MyClass in global_objects.h. You do not need to #include myclass.h there