Deprecate referencehelper.hh and the utilities therein
This has been moved to dune-common. Hence one should
include dune/common/referencehelper.hh
and use those
utilities from namespace Dune::
instead of Dune::Functions::
.
Since this has been released with 2.8, the versions in
Dune::Functions::
stay deprecated for 2.9.
This is an alternative to !357 (closed) which deprecated the header instead of removing it.
Edited by Carsten Gräser