multi_variate_differentiable_function.h

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/*
 * Copyright 2021 MusicScience37 (Kenta Kabashima)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#pragma once
 
#include <type_traits>  // IWYU pragma: keep
 
#include "num_collect/base/concepts/real_scalar_dense_matrix.h"
#include "num_collect/base/concepts/real_scalar_dense_vector.h"
#include "num_collect/roots/concepts/differentiable_function.h"
 
namespace num_collect::roots::concepts {
 
template <typename T>
concept multi_variate_differentiable_function = differentiable_function<T> &&
    base::concepts::real_scalar_dense_vector<typename T::variable_type> &&
    base::concepts::real_scalar_dense_matrix<typename T::jacobian_type> &&
    std::is_same_v<typename T::variable_type::Scalar,
        typename T::jacobian_type::Scalar>;
 
}  // namespace num_collect::roots::concepts