/*******************************************************************************
* Copyright 2017-2018 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.
*******************************************************************************/

#pragma once

#include <memory>
#include <unordered_map>

namespace ngraph
{
    class Function;

    namespace autodiff
    {
        /// @brief Returns a FunctionSpec for the backprop derivative of its argument.
        /// @param f is f(X_i...)
        /// @returns f'(X_i..., c) where f'(x_i, ..., c)_j is backprop for X_j
        std::shared_ptr<Function> backprop_function(const std::shared_ptr<Function>& f);
    }
}