Multigrid with adaptive refinement and inner face batches in matrix-free

[Davit Gyulamiryan]

Dear deal.ii team,

I am developing some code that uses multigrid with adaptively refined triangulations (the multigrid levels are built by passing `construct_multigrid_hierarchy` to the triangulation). I am also using matrix-free operators some of which require iterating over the inner cell batches. However, I have encountered the following message from the code raised from 

the `MatrixFere::reinint()` function when initialising the matrix-free storage fo ther multigrid 

levels:

if (additional_data.mapping_update_flags_inner_faces != update_default)

Assert(face_setup.refinement_edge_faces.empty(),

    ExcNotImplemented("Setting up data structures on MG levels with "

      "hanging nodes is currently not supported."));

I was wondering if this is something that is planned to be released soon, or if I could get some advice on how to implement it myself.

Looking forward to hearing from you.

Best wishes,

Davit Gyulamiryan

[Davit Gyulamiryan]

Edit: I am also using matrix-free operators some of which require iterating over the inner cell batches  ->  I am also using matrix-free operators some of which require iterating over the inner face batches.