CwiseNullaryOp.hpp

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/* This file is part of OpenKalman, a header-only C++ library for
 * Kalman filters and other recursive filters.
 *
 * Copyright (c) 2023-2024 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_EIGEN_TRAITS_CWISENULLARYOP_HPP
#define OPENKALMAN_EIGEN_TRAITS_CWISENULLARYOP_HPP

#include <type_traits>


namespace OpenKalman::interface
{
  template<typename NullaryOp, typename PlainObjectType>
  struct indexible_object_traits<Eigen::CwiseNullaryOp<NullaryOp, PlainObjectType>>
    : Eigen3::indexible_object_traits_base<Eigen::CwiseNullaryOp<NullaryOp, PlainObjectType>>
  {
  private:

    using Base = Eigen3::indexible_object_traits_base<Eigen::CwiseNullaryOp<NullaryOp, PlainObjectType>>;

    using NullaryTraits = Eigen3::NullaryFunctorTraits<NullaryOp, PlainObjectType>;

    template<typename T>
    struct has_params : std::bool_constant<
      Eigen::CwiseNullaryOp<NullaryOp, PlainObjectType>::RowsAtCompileTime == Eigen::Dynamic or
      Eigen::CwiseNullaryOp<NullaryOp, PlainObjectType>::ColsAtCompileTime == Eigen::Dynamic> {};

    template<typename Scalar>
    struct has_params<Eigen::internal::scalar_constant_op<Scalar>> : std::true_type {};

    template<typename...Args>
    struct has_params<Eigen::internal::linspaced_op<Args...>> : std::true_type {};

  public:

    // nested_object() not defined


    template<typename Arg>
    static constexpr auto get_constant(const Arg& arg)
    {
      return NullaryTraits::template get_constant(arg);
    }


    template<typename Arg>
    static constexpr auto get_constant_diagonal(const Arg& arg)
    {
      return NullaryTraits::template get_constant_diagonal(arg);
    }


    template<Applicability b>
    static constexpr bool one_dimensional = OpenKalman::one_dimensional<PlainObjectType, b>;


    template<Applicability b>
    static constexpr bool is_square = square_shaped<PlainObjectType, b>;


    template<TriangleType t>
    static constexpr bool is_triangular = NullaryTraits::template is_triangular<t>;


    static constexpr bool is_triangular_adapter = false;


    static constexpr bool is_hermitian = NullaryTraits::is_hermitian;

  };


} // namespace OpenKalman::interface

#endif //OPENKALMAN_EIGEN_TRAITS_CWISENULLARYOP_HPP