QWidget::geometry() and QWidget::mapToParent() documentation is not accurate

https://doc.qt.io/qt-5/qwidget.html#geometry-prop says

This property holds the geometry of the widget relative to its parent and excluding the window frame

That's not true if the widget is a window. The documentation doesn't mention that.

https://doc.qt.io/qt-5/application-windows.html#window-geometry

No mention of windows either, or if it's relative or absolute coordinates.

https://doc.qt.io/qt-5/qwidget.html#mapToParent

Translates the widget coordinate pos to a coordinate in the parent widget.

Same as mapToGlobal() if the widget has no parent.

This is also not true if the widget is a window.

The only documentation (that I found) which addresses this is

https://doc.qt.io/qt-5/qwidget.html#pos-prop

This property holds the position of the widget within its parent widget

If the widget is a window, the position is that of the widget on the desktop, including its frame.

But to even realize that there's a connection, one needs to know that both pos() and geometry() refer to QWidget::data::crect internally.

I did not check any other methods or properties.

I found out about this in 4.8.7, but it seems to affect all versions.