'Q_DECLARE_METATYPE' is not defined

[Tassos Tzavellas]

Hi,

I want to use the QItemEditorFactory to register a CustomEditor class for my own CustomType. The official Qt documentation<https://doc.qt.io/qtforpython-6/overviews/custom-types.html> dictates the use of either of these two macros for registering custom types to the Qt Meta type system (and subsequent use in the factory):
Q_DECLARE_METATYPE and qRegisterMetaType.

Since I don't care about signals/slots mechanism, the first macro is the obvious choice.

>From the study of the PyQt documentation<https://www.riverbankcomputing.com/static/Docs/PyQt5/api/qtcore/qmetatype.html>, this macro should be supported and probably it should exist by importing the PyQt5.QtCore.QMetaType module.

However, that is not the case. My python interpreter (version 3.9.7) gives me an error : NameError: name 'Q_DECLARE_METATYPE' is not defined.

Here is a snippet from my source code:

from PyQt5.QtCore import QMetaType
class CustomType:
    def __init__(self) -> None:
        pass

Q_DECLARE_METATYPE(MyClass)


Naturally, I tried invoking the qRegisterMetaType as well, with similar results. What am I doing wrong? Do these macros exist in PyQt5 (version 5.15.6)

Thank you in advance,
Tassos
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