invalid use of incomplete type; forward declaration of struct…..from auto-generated c

[tesmai4]

Dear all,

I created a “QWizardPage form class” in my project. I get the following errors from the auto-generated code:

registerwizardpage.cpp: In constructor ‘RegisterWizardPage::RegisterWizardPage(QWid get*)’:

registerwizardpage.cpp:6: error: invalid use of incomplete type ‘struct Ui::RegisterWizardPage’

registerwizardpage.h:7: error: forward declaration of ‘struct Ui::RegisterWizardPage’

registerwizardpage.cpp:8: error: invalid use of incomplete type ‘struct Ui:RegisterWizardPage’

registerwizardpage.h:7: error: forward declaration of ‘struct Ui::RegisterWizardPage’

registerwizardpage.cpp: In destructor ‘virtual RegisterWizardPage::~RegisterWizardPage()’:

registerwizardpage.cpp:13: warning: possible problem detected in invocation of delete operator:

registerwizardpage.cpp:13: warning: invalid use of incomplete type ‘struct Ui::RegisterWizardPage’

registerwizardpage.h:7: warning: forward declaration of ‘struct Ui::RegisterWizardPage’

Any help for resolving this error please.

RegisterWizardPage.h

#ifndef REGISTERWIZARDPAGE_H
#define REGISTERWIZARDPAGE_H
#include <QWizardPage>
 
namespace Ui {
class RegisterWizardPage;
}
 
class RegisterWizardPage : public QWizardPage
{
    Q_OBJECT
 
public:
    explicit RegisterWizardPage(QWidget *parent = 0);
    ~RegisterWizardPage();
 
private:
    Ui::RegisterWizardPage *ui;
};
 
#endif // REGISTERWIZARDPAGE_H

#ifndef REGISTERWIZARDPAGE_H
#define REGISTERWIZARDPAGE_H
#include <QWizardPage>
 
namespace Ui {
class RegisterWizardPage;
}
 
class RegisterWizardPage : public QWizardPage
{
    Q_OBJECT
   
public:
    explicit RegisterWizardPage(QWidget *parent = 0);
    ~RegisterWizardPage();
   
private:
    Ui::RegisterWizardPage *ui;
};
 
#endif // REGISTERWIZARDPAGE_H

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RegisterWizardPage.cpp

#include "registerwizardpage.h"
#include "ui_registerwizardpage.h"
 
RegisterWizardPage::RegisterWizardPage(QWidget *parent) :
    QWizardPage(parent),
    ui(new Ui::RegisterWizardPage)
{
    ui->setupUi(this);
}
 
RegisterWizardPage::~RegisterWizardPage()
{
    delete ui;
}

#include "registerwizardpage.h"
#include "ui_registerwizardpage.h"
 
RegisterWizardPage::RegisterWizardPage(QWidget *parent) :
    QWizardPage(parent),
    ui(new Ui::RegisterWizardPage)
{
    ui->setupUi(this);
}
 
RegisterWizardPage::~RegisterWizardPage()
{
    delete ui;
}

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[anda_skoa]

Check the generated ui_registerwizardpage.h file if it does indeed define the class name you are looking for.

Maybe you changed the Form's name after the orignal code for RegisterWizardPage.h/.cpp was created.

Cheers,
_