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error.hpp
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error.hpp
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/*
* Copyright (C) 2020 Tusooa Zhu
*
* This file is part of libkazv.
*
* libkazv is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* libkazv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with libkazv. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include <libkazv-config.hpp>
#ifndef NDEBUG
#include <lager/debug/cereal/struct.hpp>
#endif
#include "types.hpp"
#include <variant>
namespace Kazv
{
struct Error
{
struct NoError {};
using JsonError = JsonWrap;
std::variant<NoError, JsonError, std::string> error;
struct SetErrorAction {
std::variant<NoError, JsonError, std::string> error;
};
using Action = std::variant<SetErrorAction>;
static inline Error update(Error, Action a) {
return Error{std::get<SetErrorAction>(a).error};
}
constexpr bool hasError() const {
return !std::holds_alternative<NoError>(error);
}
constexpr bool isJson() const {
return !std::holds_alternative<JsonError>(error);
}
};
constexpr inline bool operator==(Error::NoError, Error::NoError)
{
return true;
}
inline bool operator==(Error a, Error b)
{
return a.error == b.error;
}
#ifndef NDEBUG
LAGER_CEREAL_STRUCT(Error::SetErrorAction);
#endif
LAGER_CEREAL_STRUCT(Error::NoError);
template<class Archive>
void serialize(Archive &ar, Error &m, std::uint32_t const /*version*/)
{
ar(m.error);
}
}
CEREAL_CLASS_VERSION(Kazv::Error, 0);

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error.hpp (2 KB)

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