text: /*******************************************************************************
  * Copyright 2020 Intel Corporation
  *
  * 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.
  *******************************************************************************/
  
  #include "oneapi/dal/algo/knn/backend/cpu/train_kernel.hpp"
  #include "oneapi/dal/backend/interop/common.hpp"
  #include "oneapi/dal/backend/interop/error_converter.hpp"
  
  namespace oneapi::dal::knn::backend {
  
  using dal::backend::context_cpu;
  
  template <typename Float, typename Task>
  struct train_kernel_cpu<Float, method::brute_force, Task> {
      train_result<Task> operator()(const context_cpu& ctx,
                                    const descriptor_base<Task>& desc,
                                    const train_input<Task>& input) const {
          throw unimplemented(
              dal::detail::error_messages::knn_brute_force_method_is_not_implemented_for_cpu());
          return train_result<Task>();
      }
  };
  
  template struct train_kernel_cpu<float, method::brute_force, task::classification>;
  template struct train_kernel_cpu<double, method::brute_force, task::classification>;
  
  } // namespace oneapi::dal::knn::backend
  