/usr/include/dune/pdelab/gridfunctionspace/subspacelocalfunctionspace.hh is in libdune-pdelab-dev 2.5.0~rc1-2build1.
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// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_PDELAB_GRIDFUNCTIONSPACE_SUBSPACELOCALFUNCTIONSPACE_HH
#define DUNE_PDELAB_GRIDFUNCTIONSPACE_SUBSPACELOCALFUNCTIONSPACE_HH
/** \file
* \brief Support infrastructure to make LocalFunctionSpaces of GridFunctionSubSpace work.
*/
// nothing in here is of interest to our users
#ifndef DOXYGEN
#include <dune/pdelab/gridfunctionspace/localfunctionspace.hh>
namespace Dune {
namespace PDELab {
namespace gfs {
// ********************************************************************************
// utility functions for copying a tree path to an iterator range in reverse order
// ********************************************************************************
template<typename It>
void extract_tree_path_elements(TypeTree::TreePath<>, It it)
{
// end of recursion
}
template<typename TP, typename It>
void extract_tree_path_elements(TP, It it)
{
*it = TypeTree::TreePathBack<TP>::value;
extract_tree_path_elements(typename TypeTree::TreePathPopBack<TP>::type(),++it);
}
// ********************************************************************************
// intermediate base class for LocalFunctionSpaces of GridFunctionSubSpace
// ********************************************************************************
// This class works for subspaces of any kind of underlying space (leaf, Power, Composite)
// thanks to the magic of perfect forwarding
template<typename GFS, typename LFS>
class SubSpaceLocalFunctionSpaceNode
: public LFS
{
public:
typedef typename LFS::Traits Traits;
template<typename... T>
SubSpaceLocalFunctionSpaceNode(T&&... t)
: LFS(std::forward<T>(t)...)
{
extract_tree_path_elements(typename GFS::SubSpacePath(),_tree_path.begin());
}
// modify bind to fill up the DOFIndices with our subspace path
template<typename E>
void bind(const E& e)
{
LFS::bind(e);
for (auto di= this->_dof_index_storage.begin(), end=this->_dof_index_storage.end();
di!=end; ++di)
complete_dof_index(*di);
}
std::size_t subSpaceDepth() const
{
return this->gridFunctionSpace().subSpaceDepth();
}
private:
//! Extends DOFIndex up to the root of the original DOFIndex tree.
void complete_dof_index(typename Traits::DOFIndex& di) const
{
std::copy(_tree_path.begin(),_tree_path.end(),std::back_inserter(di.treeIndex()));
}
std::array<std::size_t,TypeTree::TreePathSize<typename GFS::SubSpacePath>::value> _tree_path;
};
// forward declaration for use in LocalFunctionSpace specialization.
template<typename GFS, typename TreePath>
class GridFunctionSubSpace;
} // namespace gfs
// specialized version of LocalFunctionSpace interface class
// This class injects SubSpaceLocalFunctionSpaceNode as an intermediate base class
// to fix the DOFIndex handling in bind().
template <typename BaseGFS, typename SubSpaceTreePath>
class LocalFunctionSpace<gfs::GridFunctionSubSpace<BaseGFS,SubSpaceTreePath>, AnySpaceTag>
: public gfs::SubSpaceLocalFunctionSpaceNode<gfs::GridFunctionSubSpace<BaseGFS,SubSpaceTreePath>,
typename TypeTree::TransformTree<
gfs::GridFunctionSubSpace<BaseGFS,SubSpaceTreePath>,
gfs_to_lfs<gfs::GridFunctionSubSpace<
BaseGFS,
SubSpaceTreePath
>
>
>::Type
>
{
typedef gfs::GridFunctionSubSpace<BaseGFS,SubSpaceTreePath> GFS;
typedef gfs::SubSpaceLocalFunctionSpaceNode<
GFS,
typename TypeTree::TransformTree<
GFS,
gfs_to_lfs<GFS>
>::Type
> BaseT;
template<typename>
friend struct PropagateGlobalStorageVisitor;
template<typename>
friend struct ClearSizeVisitor;
template<typename>
friend struct ComputeSizeVisitor;
template<typename>
friend struct FillIndicesVisitor;
public:
LocalFunctionSpace(const GFS & gfs)
: BaseT(TypeTree::TransformTree<GFS,gfs_to_lfs<GFS> >::transform(gfs))
{
this->_dof_indices = &(this->_dof_index_storage);
this->setup(*this);
}
LocalFunctionSpace(std::shared_ptr<const GFS> pgfs)
: BaseT(TypeTree::TransformTree<GFS,gfs_to_lfs<GFS> >::transform_storage(pgfs))
{
this->_dof_indices = &(this->_dof_index_storage);
this->setup(*this);
}
LocalFunctionSpace(const LocalFunctionSpace & lfs)
: BaseT(lfs)
{
// We need to reset the DOFIndex storage pointers in the new LFS tree,
// as they are still pointing to the _dof_index_storage of the
// old tree.
this->_dof_indices = &(this->_dof_index_storage);
this->setup(*this);
}
};
} // namespace PDELab
} // namespace Dune
#endif // DOXYGEN
#endif // DUNE_PDELAB_GRIDFUNCTIONSPACE_SUBSPACELOCALFUNCTIONSPACE_HH
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