/usr/include/dune/pdelab/common/globaldofindex.hh is in libdune-pdelab-dev 2.5.0~20170124g7cf9f47a-1.
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// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_PDELAB_COMMON_GLOBALDOFINDEX_HH
#define DUNE_PDELAB_COMMON_GLOBALDOFINDEX_HH
#include <dune/pdelab/common/multiindex.hh>
namespace Dune {
namespace PDELab {
template<typename T, std::size_t tree_n, typename ID>
class GlobalDOFIndex
{
public:
//! The maximum possible depth of the MultiIndex.
static const std::size_t max_depth = tree_n;
typedef ID EntityID;
typedef MultiIndex<T,max_depth> TreeIndex;
typedef typename TreeIndex::size_type size_type;
typedef T value_type;
class View
{
friend class GlobalDOFIndex;
public:
static const std::size_t max_depth = tree_n;
typedef ID EntityID;
typedef typename MultiIndex<T,tree_n>::View TreeIndex;
const EntityID& entityID() const
{
return _entity_id;
}
const TreeIndex& treeIndex() const
{
return _tree_index_view;
}
View back_popped() const
{
return View(_entity_id,_tree_index_view.back_popped());
}
friend std::ostream& operator<< (std::ostream& s, const View& di)
{
s << "(";
s << di._entity_id;
s << " | "
<< di._tree_index_view
<< ")";
return s;
}
std::size_t size() const
{
return _tree_index_view.size();
};
private:
explicit View(const GlobalDOFIndex& dof_index)
: _entity_id(dof_index._entity_id)
, _tree_index_view(dof_index._tree_index.view())
{}
View(const GlobalDOFIndex& dof_index, std::size_t size)
: _entity_id(dof_index._entity_id)
, _tree_index_view(dof_index._tree_index.view(size))
{}
View(const EntityID& entity_id, const TreeIndex& tree_index)
: _entity_id(entity_id)
, _tree_index_view(tree_index)
{}
const EntityID& _entity_id;
TreeIndex _tree_index_view;
};
//! Default constructor.
GlobalDOFIndex()
{}
GlobalDOFIndex(const EntityID& entity_id, const TreeIndex& tree_index)
: _entity_id(entity_id)
, _tree_index(tree_index)
{}
View view() const
{
return View(*this);
}
View view(std::size_t size) const
{
return View(*this,size);
}
void clear()
{
_entity_id = EntityID();
_tree_index.clear();
}
//! Returns the index of the grid entity associated with the DOF.
EntityID& entityID()
{
return _entity_id;
}
const EntityID& entityID() const
{
return _entity_id;
}
TreeIndex& treeIndex()
{
return _tree_index;
}
const TreeIndex& treeIndex() const
{
return _tree_index;
}
//! Writes a pretty representation of the MultiIndex to the given std::ostream.
friend std::ostream& operator<< (std::ostream& s, const GlobalDOFIndex& di)
{
s << "(";
s << di._entity_id;
s << " | "
<< di._tree_index
<< ")";
return s;
}
//! Tests whether two MultiIndices are equal.
/**
* \note Only MultiIndices of identical max_depth are comparable
*/
bool operator== (const GlobalDOFIndex& r) const
{
return
_entity_id == r._entity_id && _tree_index == r._tree_index;
}
//! Tests whether two MultiIndices are not equal.
bool operator!= (const GlobalDOFIndex& r) const
{
return !(*this == r);
}
std::size_t size() const
{
return _tree_index.size();
}
private:
EntityID _entity_id;
TreeIndex _tree_index;
};
template<typename T, std::size_t n, typename ID>
inline std::size_t hash_value(const GlobalDOFIndex<T,n,ID>& di)
{
std::size_t seed = 0;
std::hash<ID> id_hasher;
hash_combine(seed,id_hasher(di.entityID()));
hash_range(seed,di.treeIndex().begin(),di.treeIndex().end());
return seed;
}
} // namespace PDELab
} // namespace Dune
DUNE_DEFINE_HASH(DUNE_HASH_TEMPLATE_ARGS(typename T, std::size_t n, typename ID),DUNE_HASH_TYPE(Dune::PDELab::GlobalDOFIndex<T,n,ID>))
#endif // DUNE_PDELAB_COMMON_GLOBALDOFINDEX_HH
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