// Copyright (c) 2026 PaddlePaddle Authors. All Rights Reserved.
//
// 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 <ATen/core/Tensor.h>

namespace at {

inline at::Tensor flatten(const at::Tensor& self,
                          int64_t start_dim = 0,
                          int64_t end_dim = -1) {
  return Tensor(paddle::experimental::flatten(self._PD_GetInner(),
                                              static_cast<int>(start_dim),
                                              static_cast<int>(end_dim)));
}

}  // namespace at

namespace at {

inline at::Tensor Tensor::flatten(int64_t start_dim, int64_t end_dim) const {
  return at::flatten(*this, start_dim, end_dim);
}

}  // namespace at