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:

[code=cpp]//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_c ode, canmsg);
}

virtual void connectNode() = 0;
virtual int vcaSendMsgSeq(c anmsg_t *messages, int count) = 0;
virtual int vcaRecMsgSeq(ca nmsg_t *messages, int count) = 0;

signals:
void sentMsg(int event_code, const canmsg_t *canmsg);

public slots:
virtual void nodeReady() = 0;

};
#endif[/code]


Then I want to inherit it and override virtual methods ...So I created another class "VcaFdNode" that looks like this:
[code=cpp]//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 <QSocketNotifie r>

#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(VcaNe t *_cannet, const char *dev_name/*, const char *options, int flags*/);
~VcaFdNode();

void connectNode();//OK
int vcaSendMsgSeq(c anmsg_t *messages, int count);//OK
int vcaRecMsgSeq(ca nmsg_t *messages, int count);//OK

int getVcaHandle();
void setVcaHandle(in t handle);
int vcaH2fd();

public slots:
void nodeReady();//OK

};
#endif[/code]

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::Vca FdNode(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]

[code=cpp]//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[/code]

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 interoperabilit y problem with vca_net.h and vca_node.h.


[code=cpp]//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 <QSocketNotifie r>

#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[/code]

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]

[code=cpp]//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[/code]

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 interoperabilit y problem with vca_net.h and vca_node.h.


[code=cpp]//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 <QSocketNotifie r>

#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[/code]

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...remove d 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...remove d 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...t hen 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...t hen 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 <QSocketNotifie r>
#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 headerprotectio n here, otherwise you will get an error!
#ifndef _CAN_VCA_H
#define _CAN_VCA_H

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