inheritance problem: error: expected class-name before '{' token

[gyre]

Hi!
I've got a little problem I've been dealing with for several days :((
Code is written in Qt.
I'll try to explain it:

I created an abstract class "VcaNode" with 4 virtual methods and 3 other members...it is in special header:

//ABSTRACT CLASS MEMBER:
#ifndef _VCA_NODE
#define _VCA_NODE
 
#include <vca_net.h>
#include <canmsg.h>
 
#include <iostream>
using namespace std;
 
#include <QObject>
 
class VcaNet;
 
class VcaNode : public QObject
{
  Q_OBJECT
 
  public:
    VcaNet *cannet;
 
    VcaNode(VcaNet *parent){
      this->cannet = parent;
    };
    virtual ~VcaNode() {cout <<"Node Has Been destroyed/disconnected"<<endl;};
 
    void emitSentSignal(int event_code, const canmsg_t *canmsg){
      emit sentMsg(event_code, canmsg);
    }
 
   virtual void connectNode() = 0;
   virtual int  vcaSendMsgSeq(canmsg_t *messages, int count) = 0;
   virtual int  vcaRecMsgSeq(canmsg_t *messages, int count) = 0;
 
   signals:
     void sentMsg(int event_code, const canmsg_t *canmsg);
 
   public slots:
     virtual void nodeReady() = 0;
 
};
#endif

Then I want to inherit it and override virtual methods ...So I created another class "VcaFdNode" that looks like this:

//INHERITED CLASS 
#ifndef _CAN_VCA_H
#define _CAN_VCA_H
 
#include <vca_net.h>
#include <vca_node.h>
#include <vca_net.h>
 
#include <QObject>
#include <QSocketNotifier>
 
#include <stdarg.h>
#ifndef __RTL__
#include <sys/time.h>
#else /*__RTL__*/
#include <time.h>
#endif /*__RTL__*/
#include <can.h>
 
class VcaNet;
//class VcaNode;
 
class VcaFdNode : public VcaNode
{
  private:
    int vcah;
 
    int  vcaWait(int wait_msec, int what);
    long vcaH2log();
 
  public:
    bool vca_ok;
    QSocketNotifier *sn;
 
    VcaFdNode(VcaNet *_cannet, const char *dev_name/*, const char *options, int flags*/);
    ~VcaFdNode();
 
    void connectNode();//OK
    int  vcaSendMsgSeq(canmsg_t *messages, int count);//OK
    int  vcaRecMsgSeq(canmsg_t *messages, int count);//OK
 
    int  getVcaHandle();
    void setVcaHandle(int handle);
    int  vcaH2fd();
 
  public slots:
    void nodeReady();//OK
 
};
#endif

But when I try to compile source code using these header I got this error:
./vca_fdnode.h:23: error: expected class-name before '{' token
vca_fdnode.cpp: In constructor 'VcaFdNode::VcaFdNode(VcaNet*, const char*)':
vca_fdnode.cpp:63: error: type 'VcaNode' is not a direct base of 'VcaFdNode'

and so on :(

ANYONE help ? :)

THANKS A LOT IN ADVANCE...

[Banfa]

//ABSTRACT CLASS MEMBER:
#ifndef _VCA_NODE
#define _VCA_NODE
 
#include <vca_net.h>
#include <canmsg.h>
 
#include <iostream>
using namespace std;
 
#include <QObject>
 
class VcaNet;
 
class VcaNode : public QObject
{
<snipped>
};
#endif

The line "class VcaNet;" should not be required here as I assume that VcaNet is declared in vca_net.h. That it exists suggests to me that possibly it was put in to solve a problem and this intern suggests a interoperability problem with vca_net.h and vca_node.h.

//INHERITED CLASS 
#ifndef _CAN_VCA_H
#define _CAN_VCA_H
 
#include <vca_net.h>
#include <vca_node.h>
#include <vca_net.h>
 
#include <QObject>
#include <QSocketNotifier>
 
#include <stdarg.h>
#ifndef __RTL__
#include <sys/time.h>
#else /*__RTL__*/
#include <time.h>
#endif /*__RTL__*/
#include <can.h>
 
class VcaNet;
//class VcaNode;
 
class VcaFdNode : public VcaNode
{
<snipped>
};
#endif

And here is you actual problem, VcaNode is not recognised as a class name for some reason. Again the unrequired declaration of VcaNet. Noticing that vca_net.h is included before vca_node.h and taking into account the previous stated problem I would be checking vca_net.h to ensure that it wasn't accidentally using the same double inclusion protection symbol (_VCA_NODE) as vca_node.h.

[gyre]

//ABSTRACT CLASS MEMBER:
#ifndef _VCA_NODE
#define _VCA_NODE
 
#include <vca_net.h>
#include <canmsg.h>
 
#include <iostream>
using namespace std;
 
#include <QObject>
 
class VcaNet;
 
class VcaNode : public QObject
{
<snipped>
};
#endif

The line "class VcaNet;" should not be required here as I assume that VcaNet is declared in vca_net.h. That it exists suggests to me that possibly it was put in to solve a problem and this intern suggests a interoperability problem with vca_net.h and vca_node.h.

//INHERITED CLASS 
#ifndef _CAN_VCA_H
#define _CAN_VCA_H
 
#include <vca_net.h>
#include <vca_node.h>
#include <vca_net.h>
 
#include <QObject>
#include <QSocketNotifier>
 
#include <stdarg.h>
#ifndef __RTL__
#include <sys/time.h>
#else /*__RTL__*/
#include <time.h>
#endif /*__RTL__*/
#include <can.h>
 
class VcaNet;
//class VcaNode;
 
class VcaFdNode : public VcaNode
{
<snipped>
};
#endif

And here is you actual problem, VcaNode is not recognised as a class name for some reason. Again the unrequired declaration of VcaNet. Noticing that vca_net.h is included before vca_node.h and taking into account the previous stated problem I would be checking vca_net.h to ensure that it wasn't accidentally using the same double inclusion protection symbol (_VCA_NODE) as vca_node.h.

I changed it according to your advice...removed previous declaration of VcaNet class...didn't help...
_VCA_NODE symbol is used only in vca_node.h header...still dunno :(

[gyre]

I changed it according to your advice...removed previous declaration of VcaNet class...didn't help...
_VCA_NODE symbol is used only in vca_node.h header...still dunno :(

Btw...when I replaced that VcaNet declaration...then compiler threw even more errors - vca_node.h did not recognize VcaNet class...
When I put all classes in one header file everything is compiled OK...
hm getting frustrated and mad more and more ;(

[Banfa]

Btw...when I replaced that VcaNet declaration...then compiler threw even more errors - vca_node.h did not recognize VcaNet class...
When I put all classes in one header file everything is compiled OK...
hm getting frustrated and mad more and more ;(

I think seeing vca_net.h would help.

[Turboente]

Try this (sorry for my english):

//INHERITED CLASS

#include <vca_net.h>
#include <vca_node.h>
#include <vca_net.h>
#include <QObject>
#include <QSocketNotifier>
#include <stdarg.h>
#ifndef __RTL__
#include <sys/time.h>
#else /*__RTL__*/
#include <time.h>
#endif /*__RTL__*/
#include <can.h>

class VcaNet;
//class VcaNode;

// put the headerprotection here, otherwise you will get an error!
#ifndef _CAN_VCA_H
#define _CAN_VCA_H

class VcaFdNode : public VcaNode
{
<snipped>
};
#endif