/usr/include/dune/grid/test/checkiterators.cc is in libdune-grid-dev 2.3.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// vi: set et ts=4 sw=2 sts=2:
#include <map>
#include <dune/common/forloop.hh>
// CheckCodimIterators
// -------------------
template< class GridView, int codim,
bool hasEntity = Dune::Capabilities::hasEntity< typename GridView::Grid, codim >::v >
struct CheckCodimIterators;
template< class GridView, int codim >
struct CheckCodimIterators< GridView, codim, false >
{
static void apply ( const GridView &gridView )
{
std::cerr << "Warning: Not checking iterators for codimension " << codim
<< ", because the corresponding entities are not implemented." << std::endl;
}
};
template< class GridView, int codim >
struct CheckCodimIterators< GridView, codim, true >
{
static void apply ( const GridView &gridView );
};
// CheckIterators
// --------------
template< class GridView >
class CheckIterators
{
template< int codim >
struct CheckCodim;
public:
static void apply ( const GridView &gridView )
{
std::cout << "Checking iterators for higher codimension..." << std::endl;
Dune::ForLoop< CheckCodim, 1, GridView::dimension >::apply( gridView );
}
};
// CheckIterators::CheckCodim
// --------------------------
template< class GridView >
template< int codim >
struct CheckIterators< GridView >::CheckCodim
{
static void apply ( const GridView &gridView )
{
return CheckCodimIterators< GridView, codim >::apply( gridView );
}
};
// Implementation of CheckCodimIterators
// -------------------------------------
template< class GridView, int codim >
inline void CheckCodimIterators< GridView, codim, true >
::apply ( const GridView &gridView )
{
typedef typename GridView::Grid::Traits::LocalIdSet LocalIdSet;
typedef typename LocalIdSet::IdType IdType;
typedef typename GridView::template Codim< codim >::Iterator CodimIterator;
typedef typename GridView::template Codim< 0 >::Iterator ElementIterator;
const LocalIdSet &idSet = gridView.grid().localIdSet();
std::map< IdType, int > count;
int size = 0;
const CodimIterator codimEnd = gridView.template end< codim >();
for( CodimIterator it = gridView.template begin< codim >(); it != codimEnd; ++it )
{
++count[ idSet.id( *it ) ];
++size;
}
const ElementIterator elementEnd = gridView.template end< 0 >();
for( ElementIterator it = gridView.template begin< 0 >(); it != elementEnd; ++it )
{
const typename ElementIterator::Entity &entity = *it;
for( int i = 0; i < entity.template count< codim >(); ++i )
{
IdType id = idSet.subId( entity, i, codim );
if( count[ id ] != 1 )
{
std::cerr << "Error: Codim " << codim << " iterator"
<< " visited entity " << id
<< " " << count[ id ] << " times." << std::endl;
assert( count[ id ] == 1 );
}
}
}
}
template< class GridView >
inline void checkIterators ( const GridView &gridView )
{
CheckIterators< GridView >::apply( gridView );
}
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