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/* Copyright 2015 Google Inc. 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.
==============================================================================*/

#ifndef TENSORFLOW_GRAPH_TENSOR_ID_H_
#define TENSORFLOW_GRAPH_TENSOR_ID_H_

#include <string>

#include "tensorflow/core/lib/core/stringpiece.h"
#include "tensorflow/core/lib/strings/strcat.h"

namespace tensorflow {

// Identifier for a tensor within a step.
// first == operation_name, second == output_index
// Note: does not own backing storage for name.
struct TensorId : public std::pair<StringPiece, int> {
  typedef std::pair<StringPiece, int> Base;

  // Inherit the set of constructors.
  using Base::pair;

  string ToString() const { return strings::StrCat(first, ":", second); }
};

TensorId ParseTensorName(const string& name);
TensorId ParseTensorName(StringPiece name);

}  // namespace tensorflow

#endif  // TENSORFLOW_GRAPH_TENSOR_ID_H_