On Thu, Dec 8, 2022 at 2:56 PM Barry Smith <bsm...@petsc.dev> wrote:
>
> You would use *PETSC_NULL_DM*LABEL but Matt needs to customize the
> PETSc Fortran stub for DMAddField() for you to handle accepting the NULL
> from PETSc.
>
Sorry, I missed this message. The customization is done.
Thanks,
Matt
> Barry
>
>
>
>
>
> On Dec 8, 2022, at 1:05 PM, Nicholas Arnold-Medabalimi <narno...@umich.edu>
> wrote:
>
> Hi Petsc Users
>
> I am trying to use DMAddField in a Fortran code. I had some questions on
> casting/passing NULL. I follow how to pass NULL for standard types (INT,
> CHAR, etc).
>
> Is there a method/best practice for passing NULL for Petsc type arguments?
> (In this case DMAddLabel I'd want to pass NULL to a DMLabel Parameter not
> an intrinsic type)
>
> For the 2nd question, In some cases in C we would cast a more specific
> object to Petsc Object
> DMAddField(dm, NULL, (PetscObject)fvm); (where fvm is a PetscFVM type)
> Is there a method or practice to do the same in Fortran.
>
> Thanks
> Nicholas
>
> --
> Nicholas Arnold-Medabalimi
>
> Ph.D. Candidate
> Computational Aeroscience Lab
> University of Michigan
>
>
>
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