Re: [Toon-members] resize in dynamic vectors/matrices ?

[Georg Klein]

Does anyone actually use the dynamic vectors/matrices in gvars3? If not 
they could be cut out and remove the need for some ugly workarounds (like 
that robust_assignment stuff).

I for one could happily live without gvar3<Vector<-1> > , and also without 
gvar3<Matrix<?,?> > for that matter.

On Wed, 15 Apr 2009, Gerhard Reitmayr wrote:

> Hi Tom and Ed (and everyone else),
>
> while trying to port gvars3 to TooN2, I found that resize() and default 
> constructors on dynamic vectors and matrices are missing. Both are necessary 
> for the current mechanics in gvars3 which creates maps between names and 
> instances of these types and uses default constructors in various places. 
> resize is also necessary to assign to the instance in the map, because 
> otherwise assignment will often fail.
>
> I added resize to both in the attached allocator.hh file and it works nicely 
> with gvars3.
>
> Discussing this with Ed, we are not sure, if we want a resize in the dynamic 
> ones? Ed mentioned the idea of another type which is resizable. One issue 
> with that is, that if resizable would not be default, the interface to gvars3 
> (which would have to use the resizable ones) might be more error prone.
>
> What does everyone thing would be best solution ?
> - add resize as I did
> - add a resizable vector/matrix type ?
> - larger hack to gvars3 to make it work with pointers to instances and swivel 
> them around ?
>
> cheers,
> Gerhard
> --
> Gerhard Reitmayr
> MIL, Engineering Department, Cambridge University
> http://mi.eng.cam.ac.uk/~gr281/