59 lines
1.1 KiB
C
59 lines
1.1 KiB
C
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/*
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* Copyright (c) 2020-2021. Uniontech Software Ltd. All rights reserved.
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*
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* Author: Iceyer <me@iceyer.net>
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*
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* Maintainer: Iceyer <me@iceyer.net>
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#ifndef LINGLONG_BOX_SRC_UTIL_JSON_H_
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#define LINGLONG_BOX_SRC_UTIL_JSON_H_
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#define JSON_USE_IMPLICIT_CONVERSIONS 0
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#include <nlohmann/json.hpp>
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#include <optional>
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#define tl std
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namespace nlohmann {
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template<class J, class T>
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inline void from_json(const J &j, tl::optional<T> &v)
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{
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if (j.is_null()) {
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v = tl::nullopt;
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} else {
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v = j.template get<T>();
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}
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}
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template<class J, class T>
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inline void to_json(J &j, const tl::optional<T> &o)
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{
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if (o.has_value()) {
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j = o.value();
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}
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}
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} // namespace nlohmann
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namespace linglong {
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template<class T>
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tl::optional<T> optional(const nlohmann::json &j, const char *key)
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{
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tl::optional<T> o;
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auto iter = j.template find(key);
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if (iter != j.end()) {
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o = iter->template get<tl::optional<T>>();
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}
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return o;
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}
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} // namespace linglong
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#endif /* LINGLONG_BOX_SRC_UTIL_JSON_H_ */
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