[Development] unified data model API in QtCore => thin wrapper proposal

[Edward Welbourne]

Thiago Macieira (5 October 2018 17:35) asked me:
> Eddy: what happens in the new API if you write:
>   const QCborArray array = { QCborArray{ 1 } };
>   QCborValue v = array[0];
>   v[0] = 2;
>
> Does that modify array?

No.  It should only modify what v[0] reports, or a v.toArray()[0]
reports, after the assignment.  My addition to the end of
tst_QCborValue::arrayDefaultInitialization() verifies exactly this with
the QVERIFY(a2.isEmpty()); that it adds, after such an assignment.

	Eddy.