[draft] Add support for raw pointers as CornerStorage
By using Dune::resolvePtrOrRef()
we can support raw pointers
as CornerStorage
in MultiLinearGeometry
and thus have a
non-owning corner storage while still being default constructible.
The test adds a third test case with raw pointer as CornerStorage
and also checks default construction and assignment of MultiLinearGeometry
if the CornerStorage
is default constructible.
Warning: This is a DRAFT implementation to demonstrate the approach.
This is only meant to demonstrate what was proposed in !224 (comment 130753).