Hello Steven, We finally located the problem to be a subtle change in another internal library. There we tried to actually get an object of one of the described abstract classes. So thanks again for your tip to investigate in that direction :) Have a good one. Tobias On 3/13/2009 4:16 PM, Steven Watanabe wrote:
AMDG
I've tried to strip the error message down to the important parts.
Tobias Alte wrote:
Generally speaking we would have the following structure:
Axis [pure virtual, abstract] { }
---------------------------------------------------------------------- [...]\boost\concept_check.hpp(250) : error C2259: 'MotionControl::Axis': cannot instantiate abstract class due to following members:
[...]\include\dataobject.h(747) : see reference to class template instantiation 'boost::CopyConstructibleConcept<TT>' being compiled with [ TT=MotionControl::Axis ] [...]\include\dataobject.h(1444) : see reference to class template instantiation 'Data<_type>' being compiled with [ _type=MotionControl::Axis ]
Why does Data require _type to be CopyConstructible? If this concept requirement is correct, why is Data being instantiated with MotionControl::Axis?
In Christ, Steven Watanabe