dolfin team mailing list archive

[Johan Hake <johan.hake@xxxxxxxxx>]

On Monday May 30 2011 04:45:51 Torbjørn Bækø Ness wrote:
> Question #157319 on DOLFIN changed:
> https://answers.launchpad.net/dolfin/+question/157319
> 
> Torbjørn Bækø Ness posted a new comment:
> Nevermind. I fixed it by exchanging
> 
>   MeshFunction<double>* c00;
>   MeshFunction<double>* c11;
>   MeshFunction<double>* c22;
> 
> with
>   boost::shared_ptr<MeshFunction<double> > c00;
>   boost::shared_ptr<MeshFunction<double> > c11;
>   boost::shared_ptr<MeshFunction<double> > c22;
> 
> Not that I know why it matters :-)

Because SWIG, which generates the Python wrappers for DOLFIN now treats all 
MeshFunctions<Foo> as boost::shared_ptr<MeshFunction<Foo> >. For method and 
function arguments typemaps are created (they more or less just grab the raw 
pointer and passes that instead of the shared_ptr version), but for public 
attributes such as the MeshFunctions above there are no such typemaps. 
Therefor you need to tell SWIG that you want the shared_ptr version.

Johan