[dune-functions] More build failures

[Oliver Sander]

Hi guys,
> I suppose it's not a 'still', but an 'again'. The example did build
> again after Steffens fixes. But after updating typetree it again failed.
> For the moment try going back to rev a709073 of typetree. This worked
> for me.
stokes-taylorhood builds again, but I get valgrind warnings *if* I build with -O2.
(I use "-g -O2 -Wall", to be exact).  Leaving out the -O2 makes the warnings go
away.  The warnings are caused by the interpolateTreeSubset method shortly
after line 300.  Before, the rhs variable contains only zeros.  After the call,
it contains initialized values (supposedly) for all boundary dofs.  Can anybody
reproduce this?
Thanks,
Oliver

>
> @Steffen: Maybe it helps that the breakage has happened after a709073.
>
> Best,
> Carsten
>
>> Here is what clang has to say.  Any help would be appreciated.
>> Best,
>> Oliver
>>
>> /home/sander/dune/dune-functions/examples/stokes-taylorhood.cc:241:35: warning: suggest braces around initialization of subobject [-Wmissing-braces]
>>   std::array<int,dim> elements = {4, 4};
>>                                   ^~~~
>>                                   {   }
>> In file included from /home/sander/dune/dune-functions/examples/stokes-taylorhood.cc:22:
>> In file included from /home/sander/dune/dune-functions/dune/functions/functionspacebases/pqknodalbasis.hh:14:
>> In file included from /home/sander/dune/dune-functions/dune/functions/functionspacebases/gridviewfunctionspacebasis.hh:7:
>> In file included from /home/sander/dune/dune-functions/dune/functions/functionspacebases/nodes.hh:6:
>> /home/sander/dune/dune-typetree/dune/typetree/compositenode.hh:195:43: error: no matching function for call to 'treePathSize'
>>         static_assert(sizeof...(I) > 0 || treePathSize(i0) > 0,
>>                                           ^~~~~~~~~~~~
>> /home/sander/dune/dune-functions/dune/functions/functionspacebases/taylorhoodbasis.hh:232:32: note: in instantiation of function template specialization
>> 'Dune::TypeTree::CompositeNode<Dune::Functions::TaylorHoodVelocityTree<Dune::GridView<Dune::DefaultLeafGridViewTraits<const Dune::YaspGrid<2, Dune::EquidistantCoordinates<double, 2> >, 4> >, unsigned
>> long, Dune::TypeTree::HybridTreePath<std::integral_constant<unsigned long, 0> > >, Dune::Functions::PQkNode<Dune::GridView<Dune::DefaultLeafGridViewTraits<const Dune::YaspGrid<2,
>> Dune::EquidistantCoordinates<double, 2> >, 4> >, 1, unsigned long, Dune::TypeTree::HybridTreePath<std::integral_constant<unsigned long, 1> > > >::child<std::integral_constant<unsigned long, 0>, int>'
>> requested here
>>     pq2NodeIndexSet_.bind(node.child(_0, 0));
>>                                ^
>> /home/sander/dune/dune-functions/dune/functions/functionspacebases/defaultlocalindexset.hh:41:19: note: in instantiation of member function
>> 'Dune::Functions::TaylorHoodNodeIndexSet<Dune::GridView<Dune::DefaultLeafGridViewTraits<const Dune::YaspGrid<2, Dune::EquidistantCoordinates<double, 2> >, 4> >, std::array<unsigned long, 2>,
>> Dune::TypeTree::HybridTreePath<>, unsigned long>::bind' requested here
>>     nodeIndexSet_.bind(localView_->tree());
>>                   ^
>> /home/sander/dune/dune-functions/examples/stokes-taylorhood.cc:199:19: note: in instantiation of member function
>> 'Dune::Functions::DefaultLocalIndexSet<Dune::Functions::DefaultLocalView<Dune::Functions::DefaultGlobalBasis<Dune::Functions::TaylorHoodNodeFactory<Dune::GridView<Dune::DefaultLeafGridViewTraits<const
>> Dune::YaspGrid<2, Dune::EquidistantCoordinates<double, 2> >, 4> >, std::array<unsigned long, 2>, unsigned long> > >,
>> Dune::Functions::TaylorHoodNodeIndexSet<Dune::GridView<Dune::DefaultLeafGridViewTraits<const Dune::YaspGrid<2, Dune::EquidistantCoordinates<double, 2> >, 4> >, std::array<unsigned long, 2>,
>> Dune::TypeTree::HybridTreePath<>, unsigned long> >::bind' requested here
>>     localIndexSet.bind(localView);
>>                   ^
>> /home/sander/dune/dune-functions/examples/stokes-taylorhood.cc:277:3: note: in instantiation of function template specialization
>> 'assembleStokesProblem<Dune::Functions::DefaultGlobalBasis<Dune::Functions::TaylorHoodNodeFactory<Dune::GridView<Dune::DefaultLeafGridViewTraits<const Dune::YaspGrid<2,
>> Dune::EquidistantCoordinates<double, 2> >, 4> >, std::array<unsigned long, 2>, unsigned long> > >' requested here
>>   assembleStokesProblem(taylorHoodBasis, stiffnessMatrix);
>>   ^
>> /home/sander/dune/dune-typetree/dune/typetree/treepath.hh:45:27: note: candidate template ignored: could not match 'TreePath' against 'integral_constant'
>>     constexpr std::size_t treePathSize(const TreePath<i...>&)
>>                           ^
>> /home/sander/dune/dune-typetree/dune/typetree/treepath.hh:372:27: note: candidate template ignored: could not match 'HybridTreePath' against 'integral_constant'
>>     constexpr std::size_t treePathSize(const HybridTreePath<T...>&)
>>                           ^
>> /home/sander/dune/dune-functions/examples/stokes-taylorhood.cc:47:55: error: no matching member function for call to 'child'
>>   auto& velocityLocalFiniteElement = localView.tree().child(_0,0).finiteElement();
>>
>>
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>