Move resolving of class fields and enum values as argument default values into AbstractMetaBuilder. Handling of static class field constants was spread between AbstractMetaBuilderPrivate::fixDefaultValue() and ShibokenGenerator::guessScopeForDefaultValue(). The former was handling it for arguments of non-primitive type only and not completely expanding namespaces. The latter was handling it for arguments of primitive types, too, but also added some code for non-static fields, which cannot be used as default arguments in C++. ShibokenGenerator::guessScopeForDefaultValue() was handling enum values for primitive and values, excluding macros by regex, but otherwise not checking if the term is really an enum value. Rewrite the code in AbstractMetaBuilderPrivate::fixDefaultValue() without regexes for clarity, let it check fields and enum values correctly via code model and fully expand namespaces. Add tests. Adapt the signature module to the now fully qualified signatures. [ChangeLog][shiboken6] When qualifying function argument default values for the generated code, shiboken no longer considers each identifier it cannot otherwise find as an enum value and no longer adds the class scope to it. This may require manually adding some replace-default-expression modifications. Task-number: PYSIDE-1691 Pick-to: 6.2 Change-Id: Id4cd2ca1f91db8c1663d7fc31e4b4ef72a5690f1 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Christian Tismer <tismer@stackless.com>