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55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
/*
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* SPDX-FileCopyrightText: Copyright (c) 2022-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <nlohmann/json.hpp>
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#include <optional>
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namespace nlohmann
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{
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template <typename T>
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struct adl_serializer<std::optional<T>>
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{
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static void to_json(nlohmann::json& j, std::optional<T> const& opt)
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{
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if (opt == std::nullopt)
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{
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j = nullptr;
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}
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else
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{
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j = opt.value(); // this will call adl_serializer<T>::to_json which will
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// find the free function to_json in T's namespace!
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}
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}
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static void from_json(nlohmann::json const& j, std::optional<T>& opt)
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{
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if (j.is_null())
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{
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opt = std::nullopt;
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}
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else
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{
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opt = j.template get<T>(); // same as above, but with
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// adl_serializer<T>::from_json
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}
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}
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};
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} // namespace nlohmann
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