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105 lines
2.7 KiB
C++
105 lines
2.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/Assertions.h>
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#include <AK/Optional.h>
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namespace AK {
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template<typename ValueType, typename ErrorType>
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class [[nodiscard]] Result
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{
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public:
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Result(const ValueType& res)
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: m_result(res)
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{
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}
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Result(ValueType && res)
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: m_result(move(res))
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{
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}
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Result(const ErrorType& error)
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: m_error(error)
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{
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}
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Result(ErrorType && error)
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: m_error(move(error))
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{
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}
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Result(const ValueType& res, const ErrorType& error)
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: m_result(res)
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, m_error(error)
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{
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}
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// FIXME: clang-format gets confused about Result. Why?
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// clang-format off
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Result(Result&& other)
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// clang-format on
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: m_result(move(other.m_result))
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, m_error(move(other.m_error))
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{
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}
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// FIXME: clang-format gets confused about Result. Why?
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// clang-format off
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Result(Result& other)
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// clang-format on
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: m_result(other.m_result)
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, m_error(other.m_error)
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{
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}
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~Result()
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{
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}
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ValueType& value()
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{
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return m_result.value();
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}
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ErrorType& error()
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{
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return m_error.value();
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}
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bool is_error() const
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{
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return m_error.has_value();
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}
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private:
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Optional<ValueType> m_result;
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Optional<ErrorType> m_error;
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};
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}
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using AK::Result;
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