optional.hpp

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// Copyright (c) 2025 Contributors to the Eclipse Foundation
//
// See the NOTICE file(s) distributed with this work for additional
// information regarding copyright ownership.
//
// This program and the accompanying materials are made available under the
// terms of the Apache Software License 2.0 which is available at
// https://www.apache.org/licenses/LICENSE-2.0, or the MIT license
// which is available at https://opensource.org/licenses/MIT.
//
// SPDX-License-Identifier: Apache-2.0 OR MIT
 
#ifndef IOX2_INCLUDE_GUARD_BB_OPTIONAL_HPP
#define IOX2_INCLUDE_GUARD_BB_OPTIONAL_HPP
 
#include "iox2/bb/duration.hpp"
#include "iox2/bb/variation/optional_adaption.hpp"
 
#include <ostream>
 
namespace iox2 {
namespace bb {
 
template <typename T>
using Optional = iox2::bb::variation::Optional<T>;
using NulloptT = iox2::bb::variation::NulloptT;
 
constexpr NulloptT NULLOPT = iox2::bb::variation::NULLOPT;
 
} // namespace bb
} // namespace iox2
 
template <typename T>
auto stream_operator(std::ostream& stream, const iox2::bb::Optional<T>& value) -> std::ostream& {
    stream << "Optional { ";
    if (value.has_value()) {
        stream << "value: " << value.value();
    } else {
        stream << "NULLOPT";
    }
    stream << " }";
 
    return stream;
}
 
#endif // IOX2_INCLUDE_GUARD_BB_OPTIONAL_HPP