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Examples of errors detected by the V762…

Examples of errors detected by the V762 diagnostic

Apr 05 2021

V762. Consider inspecting virtual function arguments. See NN argument of function 'Foo' in derived class and base class.


Notepad++

V762 It is possible a virtual function was overridden incorrectly. See first argument of function 'redraw' in derived class 'SplitterContainer' and base class 'Window'. splittercontainer.h 61


class Window
{
  ....
  virtual void display(bool toShow = true) const
  {
    ::ShowWindow(_hSelf, toShow ? SW_SHOW : SW_HIDE);
  }

  virtual void redraw(bool forceUpdate = false) const
  {
    ::InvalidateRect(_hSelf, nullptr, TRUE);
    if (forceUpdate)
      ::UpdateWindow(_hSelf);
  }
  ....
}

class SplitterContainer : public Window
{
  ....
  virtual void display(bool toShow = true) const; // <= good

  virtual void redraw() const;                    // <= error
  ....
}

Similar errors can be found in some other places:

  • V762 It is possible a virtual function was overridden incorrectly. See third argument of function 'create' in derived class 'UserDefineDialog' and base class 'StaticDialog'. userdefinedialog.h 332
  • V762 It is possible a virtual function was overridden incorrectly. See third argument of function 'create' in derived class 'FindReplaceDlg' and base class 'StaticDialog'. findreplacedlg.h 245
  • V762 It is possible a virtual function was overridden incorrectly. See third argument of function 'create' in derived class 'GoToLineDlg' and base class 'StaticDialog'. gotolinedlg.h 45
  • And 5 additional diagnostic messages.

MuseScore

V762 It is possible a virtual function was overridden incorrectly. See third argument of function 'adjustCanvasPosition' in derived class 'PianorollEditor' and base class 'MuseScoreView'. pianoroll.h 92


class MuseScoreView {
  ....
  virtual void adjustCanvasPosition(const Element*,
    bool /*playBack*/, int /*staffIdx*/ = 0) {};
  ....
}

class PianorollEditor : public QMainWindow, public MuseScoreView{
  ....
  virtual void adjustCanvasPosition(const Element*, bool);
  ....
}

class ScoreView : public QWidget, public MuseScoreView {
  ....
  virtual void adjustCanvasPosition(const Element* el,
    bool playBack, int staff = -1) override;
  ....
}

class ExampleView : public QFrame, public MuseScoreView {
  ....
  virtual void adjustCanvasPosition(const Element* el,
    bool playBack);
  ....
}

Ardour

V762 It is possible a virtual function was overridden incorrectly. See second argument of function 'set_mouse_mode' in derived class 'Editor' and base class 'PublicEditor'. editor.h 184


class PublicEditor : ....
{
  ....
  virtual void
   set_mouse_mode (Editing::MouseMode m, bool force = false) = 0;
  virtual void
   set_follow_playhead (bool yn, bool catch_up = false) = 0;
  ....
}

class Editor : public PublicEditor, ....
{
  ....
  void set_mouse_mode (Editing::MouseMode, bool force=true);
  void set_follow_playhead (bool yn, bool catch_up = true);
  ....
}

Command & Conquer

V762 It is possible a virtual function was overridden incorrectly. See first argument of function 'Occupy_List' in derived class 'BulletClass' and base class 'ObjectClass'. BULLET.H 90


class ObjectClass : public AbstractClass
{
  ....
  virtual short const * Occupy_List(bool placement=false) const; // <=
  virtual short const * Overlap_List(void) const;
  ....
};

class BulletClass : public ObjectClass,
                    public FlyClass,
                    public FuseClass
{
  ....
  virtual short const * Occupy_List(void) const;                 // <=
  virtual short const * Overlap_List(void) const {return Occupy_List();};
  ....
};

Similar errors can be found in some other places:

  • V762 It is possible a virtual function was overridden incorrectly. See qualifiers of function 'Ok_To_Move' in derived class 'TurretClass' and base class 'DriveClass'. TURRET.H 76
  • V762 It is possible a virtual function was overridden incorrectly. See fourth argument of function 'Help_Text' in derived class 'HelpClass' and base class 'DisplayClass'. HELP.H 55
  • V762 It is possible a virtual function was overridden incorrectly. See first argument of function 'Draw_It' in derived class 'MapEditClass' and base class 'HelpClass'. MAPEDIT.H 187
  • And 5 additional diagnostic messages.

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