rangegenerators.hh

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// SPDX-FileCopyrightInfo: Copyright © DUNE Project contributors, see file LICENSE.md in module root
// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-GPL-2.0-only-with-dune-grid-glue-exception
#ifndef DUNE_GRIDGLUE_ADAPTER_RANGEGENERATORS_HH
#define DUNE_GRIDGLUE_ADAPTER_RANGEGENERATORS_HH
 
#include <dune/common/iteratorrange.hh>
 
namespace Dune {
namespace GridGlue {

template<bool reverse>
struct Reverse
  : std::integral_constant<bool, reverse>
{
  typedef Reverse type;
 
  constexpr
  Reverse<!reverse> operator!() const
    { return {}; }
};
 
#ifdef DOXYGEN

const Reverse<true> reversed;

template<...>
IteratorRange<...>
intersections(const GridGlue<...>& glue, const Reverse<...>& reverse = !reversed);
 
#else
 
namespace {
const Reverse<true> reversed = {};
} /* namespace */
 
template<typename P0, typename P1, bool reverse = false>
IteratorRange< typename GridGlue<P0, P1>::template IntersectionIterator<reverse ? 1 : 0> >
intersections(const GridGlue<P0, P1>& glue, const Reverse<reverse>& = {})
{
  const static int side = reverse ? 1 : 0;
  return {glue.template ibegin<side>(), glue.template iend<side>()};
}
 
#endif // DOXYGEN
 
} /* namespace GridGlue */
} /* namespace Dune */
 
#endif