84 lines
1.9 KiB
C++
84 lines
1.9 KiB
C++
/*
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* Copyright (C) 2023 Kyle Reed
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2016 Furrtek
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include <utility>
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template <typename TValue, typename TError>
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struct Result {
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enum class Type {
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Success,
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Error,
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} type;
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union {
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TValue value_;
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TError error_;
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};
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bool is_ok() const {
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return type == Type::Success;
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}
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operator bool() const {
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return is_ok();
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}
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bool is_error() const {
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return type == Type::Error;
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}
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const TValue& value() const& {
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return value_;
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}
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const TValue& operator*() const& {
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return value_;
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}
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TValue&& operator*() && {
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return std::move(value_);
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}
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const TError& error() const& {
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return error_;
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}
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Result() = delete;
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constexpr Result(TValue&& value)
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: type{Type::Success},
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value_{std::forward<TValue>(value)} {
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}
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constexpr Result(TError error)
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: type{Type::Error},
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error_{error} {
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}
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~Result() {
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if (is_ok())
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value_.~TValue();
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else
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error_.~TError();
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}
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}; |