mirror of
https://github.com/nlohmann/json.git
synced 2026-07-05 18:15:10 +00:00
Niels Lohmann
6f551930e5
* ⚗️ move CI targets to CMake * ♻️ add target for cpplint * ♻️ add target for self-contained binaries * ♻️ add targets for iwyu and infer * 🥾 add version output * ♻️ add target for oclint * 🎓 fix warnings * ♻️ rename targets * ♻️ use iwyu properly * 🎓 fix warnings * ♻️ use iwyu properly * ♻️ add target for benchmarks * ♻️ add target for CMake flags * 👷 use GitHub Actions * ⚗️ try to install Clang 11 * ⚗️ try to install GCC 11 * ⚗️ try to install Clang 11 * ⚗️ try to install GCC 11 * ⚗️ add clang analyze target * 🦚 remove Google Benchmark * 🤜 Google Benchmark 1.5.2 * 🦚 use fetchcontent * 🍑 add target to download a Linux version of CMake * 🤮 fix dependency * 🎓 fix includes * 🎓 fix comment * 🪝 adjust flags for GCC 11.0.0 20210110 (experimental) * 🏸 user Docker image to run CI * 🪝 add target for Valgrind * 👷 add target for Valgrind tests * ⚗️ add Dart * ⏪ remove Dart * ⚗️ do not call ctest in test subdirectory * ⚗️ download test data explicitly * ⚗️ only execute Valgrind tests * ⚗️ fix labels * 🦚 remove unneeded jobs * 🤮 cleanup * 🚷 fix OCLint call * ✅ add targets for offline and git-independent tests * ✅ add targets for C++ language versions and reproducible tests * 🤮 clean up * 👷 add CI steps for cppcheck and cpplint * 🎓 fix warnings from Clang-Tidy * 👷 add CI steps for Clang-Tidy * 🎓 fix warnings * 🪝 select proper binary * 🎓 fix warnings * 🎓 suppress some unhelpful warnings * 🎓 fix warnings * 🚶 fix format * 🎓 fix warnings * 👷 add CI steps for Sanitizers * 🎓 fix warnings * ⚡ add optimization to sanitizer build * 🎓 fix warnings * 🎓 add missing header * 🎓 fix warnings * 👷 add CI step for coverage * 👷 add CI steps for disabled exceptions and implicit conversions * 🎓 fix warnings * 👷 add CI steps for checking indentation * 🚷 fix variable use * 🧛 fix build * ➖ remove CircleCI * 👷 add CI step for diagnostics * 🎓 fix warning * 🦚 clean Travis
69 lines
1.4 KiB
C++
69 lines
1.4 KiB
C++
#pragma once
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#include <initializer_list>
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#include <utility>
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#include <nlohmann/detail/meta/type_traits.hpp>
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namespace nlohmann
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{
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namespace detail
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{
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template<typename BasicJsonType>
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class json_ref
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{
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public:
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using value_type = BasicJsonType;
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json_ref(value_type&& value)
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: owned_value(std::move(value))
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{}
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json_ref(const value_type& value)
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: value_ref(&value)
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{}
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json_ref(std::initializer_list<json_ref> init)
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: owned_value(init)
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{}
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template <
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class... Args,
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enable_if_t<std::is_constructible<value_type, Args...>::value, int> = 0 >
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json_ref(Args && ... args)
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: owned_value(std::forward<Args>(args)...)
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{}
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// class should be movable only
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json_ref(json_ref&&) noexcept = default;
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json_ref(const json_ref&) = delete;
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json_ref& operator=(const json_ref&) = delete;
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json_ref& operator=(json_ref&&) = delete;
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~json_ref() = default;
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value_type moved_or_copied() const
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{
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if (value_ref == nullptr)
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{
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return std::move(owned_value);
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}
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return *value_ref;
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}
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value_type const& operator*() const
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{
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return value_ref ? *value_ref : owned_value;
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}
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value_type const* operator->() const
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{
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return &** this;
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}
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private:
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mutable value_type owned_value = nullptr;
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value_type const* value_ref = nullptr;
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};
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} // namespace detail
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} // namespace nlohmann
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