[Dune] Use of partition iterators

[Markus Blatt]

On Tue, Sep 15, 2015 at 02:42:47PM +0200, Jö Fahlke wrote:
> 
> To unify things, and to make using the vertices() and elements() functions
> easier, recently a new scheme for naming partitions was introduced[4].  The
> new scheme makes it possible to name name all possible combinations, even
> though not all combinations are supported or are even meaningful in the
> context of entity iterators or communication.

Isn't that against the principles DUNE ("one algorithm to use them
(grids) all"?)?

Can one query what combinations are supported by a grid?

Markus
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