philwave at gmail.com
Mon Mar 27 13:05:52 CEST 2017
> . points are items
> . QPolygon is a sequential collection of points
> . QVector is a sequential collection of items
> ? QPolygon is-a QVector
> which is a fallacy.
QPolygon needs not be a QVector
QPolygon can be a QVector
QPolygon can be a QList
...but *today*, QPolygon is "implemented as a QVector"
Hence from the OO common dialect, QPolygon is-a QVector
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