On Mon, 24 Feb 2025, 8:31 am Nyall Dawson, <nyall.daw...@gmail.com> wrote:
> Hi all, > > Please see https://github.com/qgis/QGIS-Enhancement-Proposals/pull/330 > for a proposed change to the QGIS coding policies to relax the current > prohibition against use of "auto" in some (more!) new cases. > > (This follows up recent changes to permit auto for smart pointer types, > see https://github.com/qgis/QGIS-Enhancement-Proposals/pull/319) > > This change relaxes the prohibition against auto to allow use of auto for > variable types when the variable type is explicitly stated during its > initialization as the result of a cast operation, such as dynamic_cast, > static_cast, const_cast, reinterpret_cast, qobject_cast, > qgsgeometry_cast, or qgis::down_cast > This proposal has passed the 2 week discussion phase and is ready for voting now. Vote away! Nyall > Specifically: > > // allowed, the pointer types are explicit during initialization: > auto markerSymbol = dynamic_cast< QgsMarkerSymbol* >( symbol ); > auto vectorLayer = qobject_cast< QgsVectorLayer* >( layer ); > if ( auto lineString = qgsgeometry_cast< const QgsLineString* >( geometry > ) ) { ... } > > // NOT allowed, the type is not explicit: > auto myLineStringPtr = downcastGeometryAsLineString( geometry ); > > Please keep discussion on > https://github.com/qgis/QGIS-Enhancement-Proposals/pull/330 so that we > have a formal record of the discussion. > > Thanks all! > Nyall > >
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