[Moved] Wierd ISO C++ forbids delaration with no type error

poporacer

I have been looking at this for over an hour and can't see the problem...and I am sure it is something right in front of my face. Here is the code:
@#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QSettings>

//Forward declaration of classes used
class NamePage;
class AddressPage;
class StartPage;

namespace Ui {
class MainWindow;

}

class MainWindow : public QMainWindow
{
Q_OBJECT

public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();

protected:
void changeEvent(QEvent *e);
void closeEvent (QCloseEvent *event);

private:
Ui::MainWindow *ui;
NamePage *name;
AddressPage *address;
StartPage *startPage;//error here...ISO C++ forbids declaration of 'StartPage' with no type???

#endif // MAINWINDOW_H@

What am I missing? It is wierd that the forward declaration of my other classes works but for this one it doesn't.

andre

You are certainly missing a closing brace for your class. Also, what compiler is this?

poporacer

Opps, I cut the irrelevant code out and accidently cut out the closing brace and semicolon. I am using the QT Creator compiler, mingw?

linoux

It looks like the compiler doesn't recognize StartPage as a class. Maybe you should include the header of StartPage and make sure the compiler sees it.

giesbert

[quote author="poporacer" date="1295531087"]Opps, I cut the irrelevant code out and accidently cut out the closing brace and semicolon. I am using the QT Creator compiler, mingw?[/quote]

can you please post the complete header? I think there must be some other error that leads to this one.

goetz

Your snippet works for me. So, as Gerolf stated, there must be some other error.

poporacer

I will post the complete header when I get home. I had another wierd error earlier this week where I added a button in designer and then when I ran the program it wasn't there. I tried clean qmake and then rebuild. It still didn't work. I ended up getting it to work by manually deleting all the build files....object files, make files etc and then run qmake and build. I tried it this time but it didn't work.
Thanks for your help.

poporacer

Real strange behaviour. If I change the forward declaration to some other name and the pointer declaration to match, it works. And when I change the header file and class declaration, the compiler doesn't highlight StartPage references as not being declared. Is it possible that StartPage is a function or class in either C++ or QT? The one thing that gives me doubts is that Volker tried the snippet and all is OK. Here is the complete header.
@#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QSettings>

#include "address.h"
#include "projects.h"

//Forward declaration of classes used
class AddressPage;
class ProjectPage;
class StartPage;
namespace Ui {
class MainWindow;

}

class MainWindow : public QMainWindow
{
Q_OBJECT

public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();

protected:
void changeEvent(QEvent *e);
void closeEvent (QCloseEvent *event);

private:
Ui::MainWindow *ui;
ProjectPage *project;
AddressPage *address;
StartPage *startPage;
void writeSettings();
void readSettings() ;
int idAddress;
int idProject;
QSettings *mSettings;

signals:
void restoreAddressCombo(int);
void cmbAddressChange(int);
void restoreProjectCombo(int);

private slots:
void on_btnSection_clicked();
};

#endif // MAINWINDOW_H
@
I tried this on another computer and got the same error. Any ideas?
I am think I might just rename my class and all references. But I would like to know why it had the problem.
Thanks a bunch. Any Ideas?

goetz

Seems to be a problem with these two includes:

@
#include "address.h"
#include "projects.h"
@

I have to comment them, because they are not on my computer. The file compiles without errors here.

giesbert

And as both are not used inside this header file, they should anyway not be included here...

poporacer

I moved the headers, and I found that the problem might lie in the classes. They reference some classes that also use winserialport.h and other classes. I think there might be a class that uses startpage so I changed the class name and the associated files and all is well. Now I ran accross another problem. But I will start a new post. I am not sure if it should be in QT or here in C++ I think it should go in QT as the error references a qt file.

Thanks for your help.