gather_tree.hpp

// Copyright (C) 2018-2021 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
//
 
#pragma once
 
#include "ngraph/op/op.hpp"
 
namespace ngraph
{
    namespace op
    {
        namespace v1
        {
            /// \brief Generates the complete beams from the ids per each step and the parent beam
            /// ids.
            class NGRAPH_API GatherTree : public Op
            {
            public:
                static constexpr NodeTypeInfo type_info{"GatherTree", 1};
                const NodeTypeInfo& get_type_info() const override { return type_info; }
                GatherTree() = default;
                /// \param step_ids     Tensor of shape [MAX_TIME, BATCH_SIZE, BEAM_WIDTH] with
                ///                     indices from per each step
                /// \param parent_idx   Tensor of shape [MAX_TIME, BATCH_SIZE, BEAM_WIDTH] with
                ///                     parent beam indices
                /// \param max_seq_len  Tensor of shape [BATCH_SIZE] with maximum lengths for each
                ///                     sequence in the batch
                /// \param end_token    Tensor of shape [MAX_TIME, BATCH_SIZE, BEAM_WIDTH]
                GatherTree(const Output<Node>& step_ids,
                           const Output<Node>& parent_idx,
                           const Output<Node>& max_seq_len,
                           const Output<Node>& end_token);
 
                bool visit_attributes(AttributeVisitor& visitor) override;
                void validate_and_infer_types() override;
 
                virtual std::shared_ptr<Node>
                    clone_with_new_inputs(const OutputVector& new_args) const override;
            };
        } // namespace v1
    }     // namespace op
} // namespace ngraph