filledarray.hh

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// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
// SPDX-FileCopyrightInfo: Copyright (C) DUNE Project contributors, see file LICENSE.md in module root
// SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
 
#ifndef DUNE_COMMON_FILLED_ARRAY_HH
#define DUNE_COMMON_FILLED_ARRAY_HH
 
#include <array>
#include <cstddef>
 
namespace Dune
{
 
  template<std::size_t n, class T>
  constexpr std::array<T, n> filledArray(const T& t)
  {
    std::array<T, n> arr{};
    // this is constexpr in c++17, `arr.fill(t)` is not
    for(auto &el : arr)
      el = t;
    return arr;
  }
 
} // end namespace Dune
 
#endif // DUNE_COMMON_FILLED_ARRAY_HH