Errors after include

[A Former User]

Hello Everybody,

I'm completly blocked at the moment :-(
Each time I try to include my header file "communicator.h" to the header "property.h" I get the strange error below. It seams to have no relationship to my include at all.
@
09:27:09: Running steps for project SaphirCube...
09:27:09: Configuration unchanged, skipping qmake step.
09:27:09: Starting: "/usr/bin/make" -j3 -w
make: Entering directory /mnt/local/home/reto/Projects/Saphir_eval/pc/SaphirCube/SaphirCube-build-Desktop_Qt_5_0_1_GCC_64bit-Debug' <<all kind of working messages>> -_64/include/QtCore -I. -I. -I. -o property_dropdown.o ../SaphirCube/property_dropdown.cpp In file included from /opt/Qt/Qt5.0.0/5.0.1/gcc_64/include/QtPrintSupport/qprinter.h:47:0, from /opt/Qt/Qt5.0.0/5.0.1/gcc_64/include/QtPrintSupport/QPrinter:1, from ../SaphirCube/Plotter/qcustomplot.h:43, from ../SaphirCube/timeplotter.h:7, from ../SaphirCube/mainwindow.h:8, from ../SaphirCube/main.cpp:4: /opt/Qt/Qt5.0.0/5.0.1/gcc_64/include/QtGui/qpagedpaintdevice.h:63:57: error: expected identifier before numeric constant /opt/Qt/Qt5.0.0/5.0.1/gcc_64/include/QtGui/qpagedpaintdevice.h:63:57: error: expected '}' before numeric constant /opt/Qt/Qt5.0.0/5.0.1/gcc_64/include/QtGui/qpagedpaintdevice.h:63:57: error: expected unqualified-id before numeric constant /opt/Qt/Qt5.0.0/5.0.1/gcc_64/include/QtGui/qpagedpaintdevice.h:67:30: error: 'virtual' outside class declaration /opt/Qt/Qt5.0.0/5.0.1/gcc_64/include/QtGui/qpagedpaintdevice.h:67:30: error: variable or field 'setPageSize' declared void /opt/Qt/Qt5.0.0/5.0.1/gcc_64/include/QtGui/qpagedpaintdevice.h:67:30: error: 'PageSize' was not declared in this scope /opt/Qt/Qt5.0.0/5.0.1/gcc_64/include/QtGui/qpagedpaintdevice.h:68:5: error: 'PageSize' does not name a type /opt/Qt/Qt5.0.0/5.0.1/gcc_64/include/QtGui/qpagedpaintdevice.h:70:50: error: 'virtual' outside class declaration /opt/Qt/Qt5.0.0/5.0.1/gcc_64/include/QtGui/qpagedpaintdevice.h:71:25: error: non-member function 'QSizeF pageSizeMM()' cannot have cv-qualifier /opt/Qt/Qt5.0.0/5.0.1/gcc_64/include/QtGui/qpagedpaintdevice.h:80:51: error: 'virtual' outside class declaration /opt/Qt/Qt5.0.0/5.0.1/gcc_64/include/QtGui/qpagedpaintdevice.h:81:23: error: non-member function 'Margins margins()' cannot have cv-qualifier /opt/Qt/Qt5.0.0/5.0.1/gcc_64/include/QtGui/qpagedpaintdevice.h:83:1: error: expected unqualified-id before 'protected' /opt/Qt/Qt5.0.0/5.0.1/gcc_64/include/QtGui/qpagedpaintdevice.h:86:1: error: expected declaration before '}' token make: *** [main.o] Error 1 make: Leaving directory /mnt/local/home/reto/Projects/Saphir_eval/pc/SaphirCube/SaphirCube-build-Desktop_Qt_5_0_1_GCC_64bit-Debug'
09:27:11: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project SaphirCube (kit: Desktop Qt 5.0.1 GCC 64bit)
When executing step 'Make' @

This is the included file:
@#ifndef COMMUNICATOR_H
#define COMMUNICATOR_H

#include <QObject>
#include <QString>
#include <QList>
#include <qextserialport.h>
#include "QsLog.h"
#include "command.h"

class Communicator : public QObject
{
Q_OBJECT
public:
explicit Communicator(QObject parent = 0);
void ExecuteCommand(Command cmd);

signals:
void got_answer(QByteArray Data);
void got_data(QByteArray Data);

public slots:
void SetDevicePath(QString path);

private slots:
void Read();

private:
QextSerialPort* port;
bool Read_busy;
QByteArray Read_incomming;
QList<Command*> CommandQueue;
int RunningNr;
void RunNext();
QByteArray Header;
};

#endif // COMMUNICATOR_H
@

and the file where I want to include:
@#ifndef PROPERTY_H
#define PROPERTY_H

#include <QWidget>
#include <QHBoxLayout>
#include <QLabel>
#include <QPushButton>
#include "command.h"
#include "communicator.h" <-- Problems start as soon this line is inserted.

class Property : public QWidget
{
Q_OBJECT
public:
explicit Property(QWidget *parent = 0);
explicit Property(QString Name, QWidget parent = 0);
void SetName(QString Name);
void SetRegister(int Reg);
void SetCommunicator(Communicator com);

public slots:
virtual void Update() = 0;

protected:
QHBoxLayout* TopLayout;
QPushButton* btnName;
int Register;
Communicator* com;

signals:
void Changed(char*, int lenght, char address);

private:
void Init();

};

#endif // PROPERTY_H
@

The file "communicator.h" has been included into the main file already without problems.

Does somebody have a Idea what that could be or a way to find the source of this bug?
Thank you a lot.
Greetings
Botnic

[A Former User]

Problem Solved!

Instead of including the file , I made a forward declaration.
(Ok, I still have no Idea why, but it works now ;-) )

Thanks

[code_fodder]

hmmmm... if I had to make an educated guess I would say there is a perhaps a subtle syntax issue.

I would say its worth digging a bit deeper to find the issue so that it does not byte you in your ass later! :o

I would try including your header with everything commented out (even the #includes), and then add parts of it back bit by bit until you see your issue again...

Honestly, if there is a "silly little error" in there it could really be a problem later and you might not know where to look :(