libminifi/include/utils/OptionalUtils.h

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 LIBMINIFI_INCLUDE_UTILS_OPTIONALUTILS_H_
#define LIBMINIFI_INCLUDE_UTILS_OPTIONALUTILS_H_

#include <utility>

#include <nonstd/optional.hpp>
#include "utils/gsl.h"

namespace org {
namespace apache {
namespace nifi {
namespace minifi {
namespace utils {
using nonstd::optional;
using nonstd::nullopt;
using nonstd::make_optional;

template<typename T>
optional<typename gsl_lite::remove_cvref<T>::type> optional_from_ptr(T&& obj) {
  return obj == nullptr ? nullopt : optional<typename gsl_lite::remove_cvref<T>::type>{ std::forward<T>(obj) };
}

}  // namespace utils
}  // namespace minifi
}  // namespace nifi
}  // namespace apache
}  // namespace org

#endif  // LIBMINIFI_INCLUDE_UTILS_OPTIONALUTILS_H_