[Dune-devel] [Dune] Reference and pointer type when dereferencing EntityPointer

[Oliver Sander]

>>
>> Then e1 = e2 makes sense again. For grids like UGGrid or ALUGrid, where
>> the Entity class carries a lot of information this can still be
>> implemented via a proxy class and some smart allocation/deallocation of
>> Entity objects.
> 
> That extra cost is certainly a problem,

UGGrid entities are mostly just three pointers, so copying them should be okay.
--
Oliver

 but I think the problem can be alleviated by returning
> a const ref to an Entity when dereferencing the facade classes. That way, each implementation
> can decide whether to return a temporary object (if creating / copying an entity is cheap) or a
> const reference to an object that is stored inside the iterator (if Entity objects are large / expensive).
> 
> Steffen
> 
>>
>> Best,
>>
>> Robert
>>
> 
> 
> 
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