iota_view.h

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// ---------------------------------------------------------------------
//
// Copyright (C) 2020 by the deal.II authors
//
// This file is part of the deal.II library.
//
// The deal.II library is free software; you can use it, redistribute
// it, and/or modify it under the terms of the GNU Lesser General
// Public License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// The full text of the license can be found in the file LICENSE.md at
// the top level directory of deal.II.
//
// ---------------------------------------------------------------------
#ifndef dealii_cxx20_iota_view_h
#define dealii_cxx20_iota_view_h
 
#include <deal.II/base/config.h>
 
#if defined __cpp_lib_ranges && __cpp_lib_ranges >= 201911
#  include <ranges>
#else
#  include <boost/range/irange.hpp>
#endif
 
DEAL_II_NAMESPACE_OPEN
 
namespace std_cxx20
{
  namespace ranges
  {
#if defined __cpp_lib_ranges && __cpp_lib_ranges >= 201911
    using std::ranges::iota_view;
#else
 
    template <typename IncrementableType, typename /*BoundType*/>
    using iota_view = boost::integer_range<IncrementableType>;
#endif
  } // namespace ranges
} // namespace std_cxx20
 
DEAL_II_NAMESPACE_CLOSE
 
#endif