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|---|---|---|---|---|
| 1 | // Copyright 2019-2022 Cambridge Quantum Computing | |||
| 2 | // | |||
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); | |||
| 4 | // you may not use this file except in compliance with the License. | |||
| 5 | // You may obtain a copy of the License at | |||
| 6 | // | |||
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 | |||
| 8 | // | |||
| 9 | // Unless required by applicable law or agreed to in writing, software | |||
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, | |||
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |||
| 12 | // See the License for the specific language governing permissions and | |||
| 13 | // limitations under the License. | |||
| 14 | ||||
| 15 | #pragma once | |||
| 16 | ||||
| 17 | #include <complex> | |||
| 18 | #include <exception> | |||
| 19 | #include <optional> | |||
| 20 | ||||
| 21 | // Workaround for Windows madness. | |||
| 22 | // See: https://github.com/nlohmann/json/issues/1408 | |||
| 23 | #undef snprintf | |||
| 24 | #include <nlohmann/json.hpp> | |||
| 25 | ||||
| 26 | // macro for type T serialization and deserialization declarations | |||
| 27 | #define JSON_DECL(T) \ | |||
| 28 | void to_json(nlohmann::json& j, const T& type); \ | |||
| 29 | void from_json(const nlohmann::json& j, T& type); | |||
| 30 | ||||
| 31 | namespace tket { | |||
| 32 | ||||
| 33 | class JsonError : public std::logic_error { | |||
| 34 | public: | |||
| 35 | 1 | explicit JsonError(const std::string& message) : std::logic_error(message) {} | ||
| 36 | }; | |||
| 37 | ||||
| 38 | } // namespace tket | |||
| 39 | ||||
| 40 | // no default serialization for complex types | |||
| 41 | namespace std { | |||
| 42 | ||||
| 43 | template <class T> | |||
| 44 | 100 | void to_json(nlohmann::json& j, const std::complex<T>& p) { | ||
| 45 |
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300 | j = nlohmann::json{p.real(), p.imag()}; | |
| 46 | 100 | } | ||
| 47 | ||||
| 48 | template <class T> | |||
| 49 | 100 | void from_json(const nlohmann::json& j, std::complex<T>& p) { | ||
| 50 | 100 | p.real(j.at(0)); | ||
| 51 | 100 | p.imag(j.at(1)); | ||
| 52 | 100 | } | ||
| 53 | ||||
| 54 | // no default serialization for std::optional types | |||
| 55 | template <class T> | |||
| 56 | 4 | void to_json(nlohmann::json& j, const std::optional<T>& v) { | ||
| 57 |
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4 | if (v.has_value()) |
| 58 | 2 | j = *v; | ||
| 59 | else | |||
| 60 | 2 | j = nullptr; | ||
| 61 | 4 | } | ||
| 62 | ||||
| 63 | template <class T> | |||
| 64 | 2 | void from_json(const nlohmann::json& j, std::optional<T>& v) { | ||
| 65 |
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2 | if (j.is_null()) |
| 66 | 1 | v = std::nullopt; | ||
| 67 | else | |||
| 68 | 1 | v = j.get<T>(); | ||
| 69 | 2 | } | ||
| 70 | ||||
| 71 | } // namespace std | |||
| 72 |