[Dune] Problem with compiling grid.globalId()

[Aleksejs Fomins]

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Dear Dune,

I am compiling the curvilinear grid at the moment. I am having a
problem with the function

const GlobalIdSet &globalIdSet () const  { return globalIdSet_; }

where GlobalIdSet is the Dune::GridTraits<...>::GlobalIdSet<...>, and
globalIdSet_ is the implementation of the IdSet, namely

class CurvIdSet<...> : public Dune::IdSet<...>

So the return value of this function does not really match what is
really returned since one is IdSet and the other IdSetImpl, but this
is how it is done in YaspGrid and GeomGrid, so I tried to do it this
way too. Unfortunately, this throws a type mismatch error.

Could someone suggest to me what the problem could be?

In other cases, the paradigm seems to be to return
DuneClass(ClassImpl(....)), but for indices and Id's there does not
seem to be a constructor from implementation, so I am puzzled on how
to make this work...


Cheers,
Aleksejs





In file included from
/home/fomins/gitwork/hades-github-lspr-ag/dune-curvilineargrid/dune/curvilineargrid/test/test-curvgrid.cc:12:0:
/home/fomins/gitwork/hades-github-lspr-ag/dune-curvilineargrid/dune/curvilineargrid/curvilineargrid/grid.hh:
In instantiation of ‘const GlobalIdSet& Dune::CurvilinearGrid<dim,
dimworld, ct>::globalIdSet() const [with int dim = 3; int dimworld =
3; ct = double; Dune::CurvilinearGrid<dim, dimworld, ct>::GlobalIdSet
= Dune::IdSet<const Dune::CurvilinearGrid<3, 3, double>,
Dune::CurvGrid::CurvIdSet<Dune::CurvilinearGrid<3, 3, double> >,
Dune::CurvilinearGridStorage<double, 3>::IdType>]’:
/home/fomins/gitwork/hades-github-lspr-ag/dune-grid/dune/grid/test/gridcheck.cc:957:7:
  required from ‘void gridcheck(Grid&) [with Grid =
Dune::CurvilinearGrid<3, 3, double>]’
/home/fomins/gitwork/hades-github-lspr-ag/dune-curvilineargrid/dune/curvilineargrid/test/test-curvgrid.cc:79:17:
  required from ‘void check_grid(Dune::CurvilinearGrid<cdim, cdim,
ctype>&) [with ctype = double; int cdim = 3]’
/home/fomins/gitwork/hades-github-lspr-ag/dune-curvilineargrid/dune/curvilineargrid/test/test-curvgrid.cc:109:25:
  required from here
/home/fomins/gitwork/hades-github-lspr-ag/dune-curvilineargrid/dune/curvilineargrid/curvilineargrid/grid.hh:295:55:
error: invalid initialization of reference of type ‘const GlobalIdSet&
{aka const Dune::IdSet<const Dune::CurvilinearGrid<3, 3, double>,
Dune::CurvGrid::CurvIdSet<Dune::CurvilinearGrid<3, 3, double> >,
Dune::CurvilinearGridStorage<double, 3>::IdType>&}’ from expression of
type ‘const IdSetImpl {aka const Dune::CurvGrid::CurvIdSet<const
Dune::CurvilinearGrid<3, 3, double> >}’
     const GlobalIdSet &globalIdSet () const  { return globalIdSet_; }
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