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// Copyright 2017 The TensorFlow 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.
// =============================================================================
#ifndef TENSORFLOW_CONTRIB_BOOSTED_TREES_LIB_UTILS_OPTIONAL_VALUE_H_
#define TENSORFLOW_CONTRIB_BOOSTED_TREES_LIB_UTILS_OPTIONAL_VALUE_H_
#include "tensorflow/core/platform/logging.h"
namespace tensorflow {
namespace boosted_trees {
namespace utils {
// Utility class holding an optional value.
template <typename T>
class OptionalValue {
public:
OptionalValue() : value_(), has_value_(false) {}
explicit OptionalValue(T value) : value_(value), has_value_(true) {}
bool has_value() const { return has_value_; }
const T& get_value() const {
QCHECK(has_value());
return value_;
}
private:
T value_;
bool has_value_;
};
} // namespace utils
} // namespace boosted_trees
} // namespace tensorflow
#endif // TENSORFLOW_CONTRIB_BOOSTED_TREES_LIB_UTILS_OPTIONAL_VALUE_H_
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