optional.h

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/*
 *
 * Copyright 2019 gRPC authors.
 *
 * 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 GRPC_CORE_LIB_GPRPP_OPTIONAL_H
#define GRPC_CORE_LIB_GPRPP_OPTIONAL_H
 
namespace grpc_core {
 
/* A make-shift alternative for absl::Optional. This can be removed in favor of
 * that once absl dependencies can be introduced. */
template <typename T>
class Optional {
 public:
  Optional() : value_() {}
  void set(const T& val) {
    value_ = val;
    set_ = true;
  }
 
  bool has_value() const { return set_; }
 
  void reset() { set_ = false; }
 
  T value() const { return value_; }
 
 private:
  T value_;
  bool set_ = false;
};
 
} /* namespace grpc_core */
 
#endif /* GRPC_CORE_LIB_GPRPP_OPTIONAL_H */