get_pattern_collection.hpp

Go to the documentation of this file.

/* This file is part of OpenKalman, a header-only C++ library for
 * Kalman filters and other recursive filters.
 *
 * Copyright (c) 2022-2026 Christopher Lee Ogden <ogden@gatech.edu>
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

#ifndef OPENKALMAN_GET_PATTERN_COLLECTION_HPP
#define OPENKALMAN_GET_PATTERN_COLLECTION_HPP

#include "patterns/patterns.hpp"
#include "linear-algebra/interfaces/interfaces-defined.hpp"
#include "linear-algebra/traits/get_mdspan.hpp"
#include "linear-algebra/traits/index_count.hpp"

namespace OpenKalman
{
#ifdef __cpp_concepts
  template<indexible T>
  constexpr patterns::pattern_collection decltype(auto)
#else
  template<typename T, std::enable_if_t<indexible<T>, int> = 0>
  constexpr decltype(auto)
#endif
  get_pattern_collection(T&& t)
  {
    using Td = stdex::remove_cvref_t<T>;
    if constexpr (interface::get_pattern_collection_defined_for<Td>)
    {
      return stdex::invoke(interface::object_traits<Td>::get_pattern_collection, std::forward<T>(t));
    }
    else
    {
      auto ex = get_mdspan(t).extents();
      return ex;
    }
  }

}

#endif