Hi Stuart, This warning is a bit of pain. Fix this warning and you generate a warning with other compilers depending upon which compiler and warning options enabled. We had a discussion and attempted to fix some of these warnings in the last dev release cycle.
Robert. On 30 June 2016 at 06:08, Stuart Mentzer <stuart_ment...@objexx.com> wrote: > Hello, > > Visual C++ 2015 finds a problem (in current master) with the initialization > of virtual base classes in the constructors of the hierarchies including > Object, Callback, NodeCallback, GUIEventHandler, EventHandler, > CameraManipulator, StandardManipulator, and AnimationManagerBase. > Constructors are attempting to initialize virtual bases Object and Callback > from classes that are not the most-derived, concrete class so those > initializations are being ignored. It doesn't help (or look right) that > multiple levels in the hierarchy attempt (and fail) to initialize these > virtual bases. > > An example of the reported warnings is: > C:\Projects\OSG\OpenSceneGraph\src\osgGA\CameraManipulator.cpp(24): warning > C4589: Constructor of abstract class 'osgGA::CameraManipulator' ignores > initializer for virtual base class 'osg::Object' > C:\Projects\OSG\OpenSceneGraph\src\osgGA\CameraManipulator.cpp(24): note: > virtual base classes are only initialized by the most-derived type > C:\Projects\OSG\OpenSceneGraph\src\osgGA\CameraManipulator.cpp(25): warning > C4589: Constructor of abstract class 'osgGA::CameraManipulator' ignores > initializer for virtual base class 'osg::Callback' > C:\Projects\OSG\OpenSceneGraph\src\osgGA\CameraManipulator.cpp(25): note: > virtual base classes are only initialized by the most-derived type > > In some cases I see the most-derived classes also do the (correct) virtual > base initialization but it looks like at least these 2 are missing it: > BasicAnimationManager::BasicAnimationManager(const AnimationManagerBase& b, > const osg::CopyOp& copyop) > TimelineAnimationManager::TimelineAnimationManager(const > TimelineAnimationManager& nc,const osg::CopyOp& co) > > I don't know enough of the internals to say if this could be causing > problems in practice but it would be good to fix this usage. I'm willing to > take a shot at it if that would be helpful. > > Stuart > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
