/usr/include/dune/functions/functionspacebases/subspacebasis.hh is in libdune-functions-dev 2.5.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#ifndef DUNE_FUNCTIONS_FUNCTIONSPACEBASES_SUBSPACEBASIS_HH
#define DUNE_FUNCTIONS_FUNCTIONSPACEBASES_SUBSPACEBASIS_HH
#include <dune/common/reservedvector.hh>
#include <dune/common/typeutilities.hh>
#include <dune/common/concept.hh>
#include <dune/functions/common/type_traits.hh>
#include <dune/functions/functionspacebases/subspacelocalview.hh>
#include <dune/functions/functionspacebases/concepts.hh>
namespace Dune {
namespace Functions {
template<class RB, class TP>
class SubspaceBasis
{
public:
using RootBasis = RB;
using RootLocalView = typename RootBasis::LocalView;
using PrefixPath = TP;
//! The grid view that the FE space is defined on
using GridView = typename RootBasis::GridView;
//! Type used for global numbering of the basis vectors
using MultiIndex = typename RootBasis::MultiIndex;
using size_type = std::size_t;
//! Type of the local view on the restriction of the basis to a single element
using LocalView = SubspaceLocalView<RootLocalView, PrefixPath>;
using SizePrefix = typename RootBasis::SizePrefix;
using LocalIndexSet = typename RootBasis::LocalIndexSet;
/** \brief Constructor for a given grid view object */
SubspaceBasis(const RootBasis& rootBasis, const PrefixPath& prefixPath) :
rootBasis_(&rootBasis),
prefixPath_(prefixPath)
{
// static_assert(models<Concept::NodeFactory<GridView>, NodeFactory>(), "Type passed to DefaultGlobalBasis does not model the NodeFactory concept.");
}
/** \brief Obtain the grid view that the basis is defined on
*/
const GridView& gridView() const
{
return rootBasis_->gridView();
}
/**
* \todo This method has been added to the interface without prior discussion.
*/
size_type dimension() const
{
return rootBasis_->dimension();
}
//! Return number of possible values for next position in empty multi index
size_type size() const
{
return rootBasis_->size();
}
//! Return number possible values for next position in multi index
size_type size(const SizePrefix& prefix) const
{
return rootBasis_->size(prefix);
}
/** \brief Return local view for basis
*
*/
LocalView localView() const
{
return LocalView(*this, prefixPath_);
}
LocalIndexSet localIndexSet() const
{
return rootBasis_->localIndexSet();
}
const RootBasis& rootBasis() const
{
return *rootBasis_;
}
const PrefixPath& prefixPath() const
{
return prefixPath_;
}
protected:
const RootBasis* rootBasis_;
PrefixPath prefixPath_;
};
template<class RootBasis, class... PrefixTreeIndices>
auto subspaceBasis(const RootBasis& rootBasis, const TypeTree::HybridTreePath<PrefixTreeIndices...>& prefixPath)
{
using PrefixPath = TypeTree::HybridTreePath<PrefixTreeIndices...>;
return SubspaceBasis<RootBasis, PrefixPath>{rootBasis, prefixPath};
}
template<class RootBasis, class... PrefixTreeIndices>
auto subspaceBasis(const RootBasis& rootBasis, const PrefixTreeIndices&... prefixTreeIndices)
{
return subspaceBasis(rootBasis, TypeTree::hybridTreePath(prefixTreeIndices...));
}
} // end namespace Functions
} // end namespace Dune
#endif // DUNE_FUNCTIONS_FUNCTIONSPACEBASES_DEFAULTGLOBALBASIS_HH
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