Merge pull request #1228 from theodelrieu/remove_static_asserts
Remove static asserts
This commit is contained in:
Niels Lohmann
GitHub
commit
d3428b35c5
11 changed files with 476 additions and 537 deletions
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@ -20,8 +20,10 @@ struct adl_serializer
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@param[in,out] val value to write to
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*/
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template<typename BasicJsonType, typename ValueType>
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static void from_json(BasicJsonType&& j, ValueType& val) noexcept(
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noexcept(::nlohmann::from_json(std::forward<BasicJsonType>(j), val)))
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static auto from_json(BasicJsonType&& j, ValueType& val) noexcept(
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noexcept(::nlohmann::from_json(std::forward<BasicJsonType>(j), val))) -> decltype(
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::nlohmann::from_json(std::forward<BasicJsonType>(j), val), void()
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)
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{
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::nlohmann::from_json(std::forward<BasicJsonType>(j), val);
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}
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@ -35,9 +37,11 @@ struct adl_serializer
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@param[in,out] j JSON value to write to
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@param[in] val value to read from
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*/
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template<typename BasicJsonType, typename ValueType>
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static void to_json(BasicJsonType& j, ValueType&& val) noexcept(
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template <typename BasicJsonType, typename ValueType>
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static auto to_json(BasicJsonType& j, ValueType&& val) noexcept(
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noexcept(::nlohmann::to_json(j, std::forward<ValueType>(val))))
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-> decltype(::nlohmann::to_json(j, std::forward<ValueType>(val)),
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void())
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{
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::nlohmann::to_json(j, std::forward<ValueType>(val));
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}
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@ -127,16 +127,6 @@ void from_json(const BasicJsonType& j, EnumType& e)
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e = static_cast<EnumType>(val);
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}
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template<typename BasicJsonType>
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void from_json(const BasicJsonType& j, typename BasicJsonType::array_t& arr)
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{
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if (JSON_UNLIKELY(not j.is_array()))
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{
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JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name())));
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}
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arr = *j.template get_ptr<const typename BasicJsonType::array_t*>();
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}
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// forward_list doesn't have an insert method
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template<typename BasicJsonType, typename T, typename Allocator,
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enable_if_t<std::is_convertible<BasicJsonType, T>::value, int> = 0>
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@ -166,24 +156,28 @@ void from_json(const BasicJsonType& j, std::valarray<T>& l)
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std::copy(j.m_value.array->begin(), j.m_value.array->end(), std::begin(l));
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}
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template<typename BasicJsonType, typename CompatibleArrayType>
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void from_json_array_impl(const BasicJsonType& j, CompatibleArrayType& arr, priority_tag<0> /*unused*/)
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template<typename BasicJsonType>
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void from_json_array_impl(const BasicJsonType& j, typename BasicJsonType::array_t& arr, priority_tag<3> /*unused*/)
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{
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using std::end;
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arr = *j.template get_ptr<const typename BasicJsonType::array_t*>();
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}
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std::transform(j.begin(), j.end(),
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std::inserter(arr, end(arr)), [](const BasicJsonType & i)
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template <typename BasicJsonType, typename T, std::size_t N>
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auto from_json_array_impl(const BasicJsonType& j, std::array<T, N>& arr,
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priority_tag<2> /*unused*/)
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-> decltype(j.template get<T>(), void())
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{
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for (std::size_t i = 0; i < N; ++i)
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{
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// get<BasicJsonType>() returns *this, this won't call a from_json
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// method when value_type is BasicJsonType
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return i.template get<typename CompatibleArrayType::value_type>();
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});
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arr[i] = j.at(i).template get<T>();
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}
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}
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template<typename BasicJsonType, typename CompatibleArrayType>
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auto from_json_array_impl(const BasicJsonType& j, CompatibleArrayType& arr, priority_tag<1> /*unused*/)
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-> decltype(
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arr.reserve(std::declval<typename CompatibleArrayType::size_type>()),
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j.template get<typename CompatibleArrayType::value_type>(),
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void())
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{
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using std::end;
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@ -198,25 +192,34 @@ auto from_json_array_impl(const BasicJsonType& j, CompatibleArrayType& arr, prio
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});
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}
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template<typename BasicJsonType, typename T, std::size_t N>
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void from_json_array_impl(const BasicJsonType& j, std::array<T, N>& arr, priority_tag<2> /*unused*/)
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template <typename BasicJsonType, typename CompatibleArrayType>
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void from_json_array_impl(const BasicJsonType& j, CompatibleArrayType& arr,
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priority_tag<0> /*unused*/)
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{
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for (std::size_t i = 0; i < N; ++i)
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using std::end;
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std::transform(
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j.begin(), j.end(), std::inserter(arr, end(arr)),
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[](const BasicJsonType & i)
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{
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arr[i] = j.at(i).template get<T>();
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}
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// get<BasicJsonType>() returns *this, this won't call a from_json
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// method when value_type is BasicJsonType
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return i.template get<typename CompatibleArrayType::value_type>();
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});
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}
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template <
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typename BasicJsonType, typename CompatibleArrayType,
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enable_if_t <
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is_compatible_array_type<BasicJsonType, CompatibleArrayType>::value and
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not std::is_same<typename BasicJsonType::array_t,
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CompatibleArrayType>::value and
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std::is_constructible <
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BasicJsonType, typename CompatibleArrayType::value_type >::value,
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int > = 0 >
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void from_json(const BasicJsonType& j, CompatibleArrayType& arr)
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template <typename BasicJsonType, typename CompatibleArrayType,
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enable_if_t <
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is_compatible_array_type<BasicJsonType, CompatibleArrayType>::value and
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not is_compatible_object_type<BasicJsonType, CompatibleArrayType>::value and
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not is_compatible_string_type<BasicJsonType, CompatibleArrayType>::value and
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not is_basic_json<CompatibleArrayType>::value,
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int > = 0 >
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auto from_json(const BasicJsonType& j, CompatibleArrayType& arr)
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-> decltype(from_json_array_impl(j, arr, priority_tag<3> {}),
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j.template get<typename CompatibleArrayType::value_type>(),
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void())
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{
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if (JSON_UNLIKELY(not j.is_array()))
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{
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@ -224,7 +227,7 @@ void from_json(const BasicJsonType& j, CompatibleArrayType& arr)
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std::string(j.type_name())));
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}
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from_json_array_impl(j, arr, priority_tag<2> {});
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from_json_array_impl(j, arr, priority_tag<3> {});
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}
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template<typename BasicJsonType, typename CompatibleObjectType,
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@ -347,35 +350,13 @@ void from_json(const BasicJsonType& j, std::unordered_map<Key, Value, Hash, KeyE
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struct from_json_fn
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{
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private:
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template<typename BasicJsonType, typename T>
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auto call(const BasicJsonType& j, T& val, priority_tag<1> /*unused*/) const
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auto operator()(const BasicJsonType& j, T& val) const
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noexcept(noexcept(from_json(j, val)))
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-> decltype(from_json(j, val), void())
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{
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return from_json(j, val);
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}
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template<typename BasicJsonType, typename T>
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void call(const BasicJsonType& /*unused*/, T& /*unused*/, priority_tag<0> /*unused*/) const noexcept
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{
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static_assert(sizeof(BasicJsonType) == 0,
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"could not find from_json() method in T's namespace");
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#ifdef _MSC_VER
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// MSVC does not show a stacktrace for the above assert
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using decayed = uncvref_t<T>;
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static_assert(sizeof(typename decayed::force_msvc_stacktrace) == 0,
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"forcing MSVC stacktrace to show which T we're talking about.");
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#endif
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}
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public:
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template<typename BasicJsonType, typename T>
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void operator()(const BasicJsonType& j, T& val) const
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noexcept(noexcept(std::declval<from_json_fn>().call(j, val, priority_tag<1> {})))
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{
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return call(j, val, priority_tag<1> {});
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}
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};
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}
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@ -248,10 +248,14 @@ void to_json(BasicJsonType& j, const std::vector<bool>& e)
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external_constructor<value_t::array>::construct(j, e);
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}
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template<typename BasicJsonType, typename CompatibleArrayType,
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enable_if_t<is_compatible_array_type<BasicJsonType, CompatibleArrayType>::value or
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std::is_same<typename BasicJsonType::array_t, CompatibleArrayType>::value,
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int> = 0>
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template <typename BasicJsonType, typename CompatibleArrayType,
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enable_if_t<is_compatible_array_type<BasicJsonType,
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CompatibleArrayType>::value and
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not is_compatible_object_type<
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BasicJsonType, CompatibleArrayType>::value and
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not is_compatible_string_type<BasicJsonType, CompatibleArrayType>::value and
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not is_basic_json<CompatibleArrayType>::value,
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int> = 0>
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void to_json(BasicJsonType& j, const CompatibleArrayType& arr)
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{
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external_constructor<value_t::array>::construct(j, arr);
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@ -271,7 +275,7 @@ void to_json(BasicJsonType& j, typename BasicJsonType::array_t&& arr)
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}
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template<typename BasicJsonType, typename CompatibleObjectType,
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enable_if_t<is_compatible_object_type<BasicJsonType, CompatibleObjectType>::value, int> = 0>
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enable_if_t<is_compatible_object_type<BasicJsonType, CompatibleObjectType>::value and not is_basic_json<CompatibleObjectType>::value, int> = 0>
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void to_json(BasicJsonType& j, const CompatibleObjectType& obj)
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{
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external_constructor<value_t::object>::construct(j, obj);
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@ -283,9 +287,12 @@ void to_json(BasicJsonType& j, typename BasicJsonType::object_t&& obj)
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external_constructor<value_t::object>::construct(j, std::move(obj));
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}
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template<typename BasicJsonType, typename T, std::size_t N,
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enable_if_t<not std::is_constructible<typename BasicJsonType::string_t, T (&)[N]>::value, int> = 0>
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void to_json(BasicJsonType& j, T (&arr)[N])
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template <
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typename BasicJsonType, typename T, std::size_t N,
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enable_if_t<not std::is_constructible<typename BasicJsonType::string_t,
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const T (&)[N]>::value,
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int> = 0 >
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void to_json(BasicJsonType& j, const T (&arr)[N])
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{
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external_constructor<value_t::array>::construct(j, arr);
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}
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@ -318,35 +325,12 @@ void to_json(BasicJsonType& j, const std::tuple<Args...>& t)
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struct to_json_fn
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{
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private:
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template<typename BasicJsonType, typename T>
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auto call(BasicJsonType& j, T&& val, priority_tag<1> /*unused*/) const noexcept(noexcept(to_json(j, std::forward<T>(val))))
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auto operator()(BasicJsonType& j, T&& val) const noexcept(noexcept(to_json(j, std::forward<T>(val))))
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-> decltype(to_json(j, std::forward<T>(val)), void())
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{
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return to_json(j, std::forward<T>(val));
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}
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template<typename BasicJsonType, typename T>
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void call(BasicJsonType& /*unused*/, T&& /*unused*/, priority_tag<0> /*unused*/) const noexcept
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{
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static_assert(sizeof(BasicJsonType) == 0,
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"could not find to_json() method in T's namespace");
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#ifdef _MSC_VER
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// MSVC does not show a stacktrace for the above assert
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using decayed = uncvref_t<T>;
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static_assert(sizeof(typename decayed::force_msvc_stacktrace) == 0,
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"forcing MSVC stacktrace to show which T we're talking about.");
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#endif
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}
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public:
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template<typename BasicJsonType, typename T>
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void operator()(BasicJsonType& j, T&& val) const
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noexcept(noexcept(std::declval<to_json_fn>().call(j, std::forward<T>(val), priority_tag<1> {})))
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{
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return call(j, std::forward<T>(val), priority_tag<1> {});
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}
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};
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}
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@ -102,22 +102,3 @@
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basic_json<ObjectType, ArrayType, StringType, BooleanType, \
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NumberIntegerType, NumberUnsignedType, NumberFloatType, \
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AllocatorType, JSONSerializer>
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/*!
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@brief Helper to determine whether there's a key_type for T.
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This helper is used to tell associative containers apart from other containers
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such as sequence containers. For instance, `std::map` passes the test as it
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contains a `mapped_type`, whereas `std::vector` fails the test.
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@sa http://stackoverflow.com/a/7728728/266378
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@since version 1.0.0, overworked in version 2.0.6
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*/
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#define NLOHMANN_JSON_HAS_HELPER(type) \
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template<typename T> struct has_##type { \
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template<typename U, typename = typename U::type> \
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static int detect(U &&); \
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static void detect(...); \
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static constexpr bool value = \
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std::is_integral<decltype(detect(std::declval<T>()))>::value; \
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}
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@ -20,4 +20,3 @@
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#undef JSON_HAS_CPP_17
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#undef NLOHMANN_BASIC_JSON_TPL_DECLARATION
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#undef NLOHMANN_BASIC_JSON_TPL
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#undef NLOHMANN_JSON_HAS_HELPER
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@ -46,26 +46,6 @@ template<> struct make_index_sequence<1> : index_sequence<0> {};
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template<typename... Ts>
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using index_sequence_for = make_index_sequence<sizeof...(Ts)>;
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/*
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Implementation of two C++17 constructs: conjunction, negation. This is needed
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to avoid evaluating all the traits in a condition
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For example: not std::is_same<void, T>::value and has_value_type<T>::value
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will not compile when T = void (on MSVC at least). Whereas
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conjunction<negation<std::is_same<void, T>>, has_value_type<T>>::value will
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stop evaluating if negation<...>::value == false
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Please note that those constructs must be used with caution, since symbols can
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become very long quickly (which can slow down compilation and cause MSVC
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internal compiler errors). Only use it when you have to (see example ahead).
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*/
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template<class...> struct conjunction : std::true_type {};
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template<class B1> struct conjunction<B1> : B1 {};
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template<class B1, class... Bn>
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struct conjunction<B1, Bn...> : std::conditional<bool(B1::value), conjunction<Bn...>, B1>::type {};
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template<class B> struct negation : std::integral_constant<bool, not B::value> {};
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// dispatch utility (taken from ranges-v3)
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template<unsigned N> struct priority_tag : priority_tag < N - 1 > {};
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template<> struct priority_tag<0> {};
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@ -7,6 +7,7 @@
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#include <nlohmann/json_fwd.hpp>
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#include <nlohmann/detail/meta/cpp_future.hpp>
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#include <nlohmann/detail/meta/detected.hpp>
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#include <nlohmann/detail/macro_scope.hpp>
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namespace nlohmann
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@ -30,9 +31,61 @@ template<typename> struct is_basic_json : std::false_type {};
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NLOHMANN_BASIC_JSON_TPL_DECLARATION
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struct is_basic_json<NLOHMANN_BASIC_JSON_TPL> : std::true_type {};
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////////////////////////
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// has_/is_ functions //
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////////////////////////
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//////////////////////////
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// aliases for detected //
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//////////////////////////
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template <typename T>
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using mapped_type_t = typename T::mapped_type;
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template <typename T>
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using key_type_t = typename T::key_type;
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template <typename T>
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using value_type_t = typename T::value_type;
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template <typename T>
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using difference_type_t = typename T::difference_type;
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template <typename T>
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using pointer_t = typename T::pointer;
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template <typename T>
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using reference_t = typename T::reference;
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template <typename T>
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using iterator_category_t = typename T::iterator_category;
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template <typename T>
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using iterator_t = typename T::iterator;
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template <typename T, typename... Args>
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using to_json_function = decltype(T::to_json(std::declval<Args>()...));
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template <typename T, typename... Args>
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using from_json_function = decltype(T::from_json(std::declval<Args>()...));
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///////////////////
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// is_ functions //
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///////////////////
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template <typename T, typename = void>
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struct is_iterator_traits : std::false_type {};
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template <typename T>
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struct is_iterator_traits<std::iterator_traits<T>>
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{
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private:
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using traits = std::iterator_traits<T>;
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public:
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static constexpr auto value =
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is_detected<value_type_t, traits>::value &&
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is_detected<difference_type_t, traits>::value &&
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is_detected<pointer_t, traits>::value &&
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is_detected<iterator_category_t, traits>::value &&
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is_detected<reference_t, traits>::value;
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};
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// source: https://stackoverflow.com/a/37193089/4116453
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@ -42,113 +95,104 @@ struct is_complete_type : std::false_type {};
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template <typename T>
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struct is_complete_type<T, decltype(void(sizeof(T)))> : std::true_type {};
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NLOHMANN_JSON_HAS_HELPER(mapped_type);
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NLOHMANN_JSON_HAS_HELPER(key_type);
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NLOHMANN_JSON_HAS_HELPER(value_type);
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NLOHMANN_JSON_HAS_HELPER(iterator);
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template<bool B, class RealType, class CompatibleObjectType>
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template <typename BasicJsonType, typename CompatibleObjectType,
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typename = void>
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struct is_compatible_object_type_impl : std::false_type {};
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template<class RealType, class CompatibleObjectType>
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struct is_compatible_object_type_impl<true, RealType, CompatibleObjectType>
|
||||
template <typename BasicJsonType, typename CompatibleObjectType>
|
||||
struct is_compatible_object_type_impl <
|
||||
BasicJsonType, CompatibleObjectType,
|
||||
enable_if_t<is_detected<mapped_type_t, CompatibleObjectType>::value and
|
||||
is_detected<key_type_t, CompatibleObjectType>::value >>
|
||||
{
|
||||
static constexpr auto value =
|
||||
std::is_constructible<typename RealType::key_type, typename CompatibleObjectType::key_type>::value and
|
||||
std::is_constructible<typename RealType::mapped_type, typename CompatibleObjectType::mapped_type>::value;
|
||||
|
||||
using object_t = typename BasicJsonType::object_t;
|
||||
|
||||
// macOS's is_constructible does not play well with nonesuch...
|
||||
static constexpr bool value =
|
||||
std::is_constructible<typename object_t::key_type,
|
||||
typename CompatibleObjectType::key_type>::value and
|
||||
std::is_constructible<typename object_t::mapped_type,
|
||||
typename CompatibleObjectType::mapped_type>::value;
|
||||
};
|
||||
|
||||
template<bool B, class RealType, class CompatibleStringType>
|
||||
template <typename BasicJsonType, typename CompatibleObjectType>
|
||||
struct is_compatible_object_type
|
||||
: is_compatible_object_type_impl<BasicJsonType, CompatibleObjectType> {};
|
||||
|
||||
template <typename BasicJsonType, typename CompatibleStringType,
|
||||
typename = void>
|
||||
struct is_compatible_string_type_impl : std::false_type {};
|
||||
|
||||
template<class RealType, class CompatibleStringType>
|
||||
struct is_compatible_string_type_impl<true, RealType, CompatibleStringType>
|
||||
template <typename BasicJsonType, typename CompatibleStringType>
|
||||
struct is_compatible_string_type_impl <
|
||||
BasicJsonType, CompatibleStringType,
|
||||
enable_if_t<is_detected_exact<typename BasicJsonType::string_t::value_type,
|
||||
value_type_t, CompatibleStringType>::value >>
|
||||
{
|
||||
static constexpr auto value =
|
||||
std::is_same<typename RealType::value_type, typename CompatibleStringType::value_type>::value and
|
||||
std::is_constructible<RealType, CompatibleStringType>::value;
|
||||
std::is_constructible<typename BasicJsonType::string_t, CompatibleStringType>::value;
|
||||
};
|
||||
|
||||
template<class BasicJsonType, class CompatibleObjectType>
|
||||
struct is_compatible_object_type
|
||||
{
|
||||
static auto constexpr value = is_compatible_object_type_impl <
|
||||
conjunction<negation<std::is_same<void, CompatibleObjectType>>,
|
||||
has_mapped_type<CompatibleObjectType>,
|
||||
has_key_type<CompatibleObjectType>>::value,
|
||||
typename BasicJsonType::object_t, CompatibleObjectType >::value;
|
||||
};
|
||||
|
||||
template<class BasicJsonType, class CompatibleStringType>
|
||||
template <typename BasicJsonType, typename CompatibleStringType>
|
||||
struct is_compatible_string_type
|
||||
: is_compatible_string_type_impl<BasicJsonType, CompatibleStringType> {};
|
||||
|
||||
template <typename BasicJsonType, typename CompatibleArrayType, typename = void>
|
||||
struct is_compatible_array_type_impl : std::false_type {};
|
||||
|
||||
template <typename BasicJsonType, typename CompatibleArrayType>
|
||||
struct is_compatible_array_type_impl <
|
||||
BasicJsonType, CompatibleArrayType,
|
||||
enable_if_t<is_detected<value_type_t, CompatibleArrayType>::value and
|
||||
is_detected<iterator_t, CompatibleArrayType>::value >>
|
||||
{
|
||||
static auto constexpr value = is_compatible_string_type_impl <
|
||||
conjunction<negation<std::is_same<void, CompatibleStringType>>,
|
||||
has_value_type<CompatibleStringType>>::value,
|
||||
typename BasicJsonType::string_t, CompatibleStringType >::value;
|
||||
// This is needed because json_reverse_iterator has a ::iterator type...
|
||||
// Therefore it is detected as a CompatibleArrayType.
|
||||
// The real fix would be to have an Iterable concept.
|
||||
static constexpr bool value = not is_iterator_traits<std::iterator_traits<CompatibleArrayType>>::value;
|
||||
};
|
||||
|
||||
template<typename BasicJsonType, typename T>
|
||||
struct is_basic_json_nested_type
|
||||
{
|
||||
static auto constexpr value = std::is_same<T, typename BasicJsonType::iterator>::value or
|
||||
std::is_same<T, typename BasicJsonType::const_iterator>::value or
|
||||
std::is_same<T, typename BasicJsonType::reverse_iterator>::value or
|
||||
std::is_same<T, typename BasicJsonType::const_reverse_iterator>::value;
|
||||
};
|
||||
|
||||
template<class BasicJsonType, class CompatibleArrayType>
|
||||
template <typename BasicJsonType, typename CompatibleArrayType>
|
||||
struct is_compatible_array_type
|
||||
{
|
||||
static auto constexpr value =
|
||||
conjunction<negation<std::is_same<void, CompatibleArrayType>>,
|
||||
negation<is_compatible_object_type<
|
||||
BasicJsonType, CompatibleArrayType>>,
|
||||
negation<std::is_constructible<typename BasicJsonType::string_t,
|
||||
CompatibleArrayType>>,
|
||||
negation<is_basic_json_nested_type<BasicJsonType, CompatibleArrayType>>,
|
||||
has_value_type<CompatibleArrayType>,
|
||||
has_iterator<CompatibleArrayType>>::value;
|
||||
};
|
||||
: is_compatible_array_type_impl<BasicJsonType, CompatibleArrayType> {};
|
||||
|
||||
template<bool, typename, typename>
|
||||
template <typename RealIntegerType, typename CompatibleNumberIntegerType,
|
||||
typename = void>
|
||||
struct is_compatible_integer_type_impl : std::false_type {};
|
||||
|
||||
template<typename RealIntegerType, typename CompatibleNumberIntegerType>
|
||||
struct is_compatible_integer_type_impl<true, RealIntegerType, CompatibleNumberIntegerType>
|
||||
template <typename RealIntegerType, typename CompatibleNumberIntegerType>
|
||||
struct is_compatible_integer_type_impl <
|
||||
RealIntegerType, CompatibleNumberIntegerType,
|
||||
enable_if_t<std::is_integral<RealIntegerType>::value and
|
||||
std::is_integral<CompatibleNumberIntegerType>::value and
|
||||
not std::is_same<bool, CompatibleNumberIntegerType>::value >>
|
||||
{
|
||||
// is there an assert somewhere on overflows?
|
||||
using RealLimits = std::numeric_limits<RealIntegerType>;
|
||||
using CompatibleLimits = std::numeric_limits<CompatibleNumberIntegerType>;
|
||||
|
||||
static constexpr auto value =
|
||||
std::is_constructible<RealIntegerType, CompatibleNumberIntegerType>::value and
|
||||
std::is_constructible<RealIntegerType,
|
||||
CompatibleNumberIntegerType>::value and
|
||||
CompatibleLimits::is_integer and
|
||||
RealLimits::is_signed == CompatibleLimits::is_signed;
|
||||
};
|
||||
|
||||
template<typename RealIntegerType, typename CompatibleNumberIntegerType>
|
||||
template <typename RealIntegerType, typename CompatibleNumberIntegerType>
|
||||
struct is_compatible_integer_type
|
||||
{
|
||||
static constexpr auto value =
|
||||
is_compatible_integer_type_impl <
|
||||
std::is_integral<CompatibleNumberIntegerType>::value and
|
||||
not std::is_same<bool, CompatibleNumberIntegerType>::value,
|
||||
RealIntegerType, CompatibleNumberIntegerType > ::value;
|
||||
};
|
||||
: is_compatible_integer_type_impl<RealIntegerType,
|
||||
CompatibleNumberIntegerType> {};
|
||||
|
||||
// trait checking if JSONSerializer<T>::from_json(json const&, udt&) exists
|
||||
template<typename BasicJsonType, typename T>
|
||||
struct has_from_json
|
||||
{
|
||||
// also check the return type of from_json
|
||||
template<typename U, typename = enable_if_t<std::is_same<void, decltype(uncvref_t<U>::from_json(
|
||||
std::declval<BasicJsonType>(), std::declval<T&>()))>::value>>
|
||||
static int detect(U&&);
|
||||
static void detect(...);
|
||||
using serializer = typename BasicJsonType::template json_serializer<T, void>;
|
||||
|
||||
static constexpr bool value = std::is_integral<decltype(
|
||||
detect(std::declval<typename BasicJsonType::template json_serializer<T, void>>()))>::value;
|
||||
static constexpr bool value =
|
||||
is_detected_exact<void, from_json_function, serializer,
|
||||
const BasicJsonType&, T&>::value;
|
||||
};
|
||||
|
||||
// This trait checks if JSONSerializer<T>::from_json(json const&) exists
|
||||
|
|
@ -156,45 +200,38 @@ struct has_from_json
|
|||
template<typename BasicJsonType, typename T>
|
||||
struct has_non_default_from_json
|
||||
{
|
||||
template <
|
||||
typename U,
|
||||
typename = enable_if_t<std::is_same<
|
||||
T, decltype(uncvref_t<U>::from_json(std::declval<BasicJsonType>()))>::value >>
|
||||
static int detect(U&&);
|
||||
static void detect(...);
|
||||
using serializer = typename BasicJsonType::template json_serializer<T, void>;
|
||||
|
||||
static constexpr bool value = std::is_integral<decltype(detect(
|
||||
std::declval<typename BasicJsonType::template json_serializer<T, void>>()))>::value;
|
||||
static constexpr bool value =
|
||||
is_detected_exact<T, from_json_function, serializer,
|
||||
const BasicJsonType&>::value;
|
||||
};
|
||||
|
||||
// This trait checks if BasicJsonType::json_serializer<T>::to_json exists
|
||||
template<typename BasicJsonType, typename T>
|
||||
struct has_to_json
|
||||
{
|
||||
template<typename U, typename = decltype(uncvref_t<U>::to_json(
|
||||
std::declval<BasicJsonType&>(), std::declval<T>()))>
|
||||
static int detect(U&&);
|
||||
static void detect(...);
|
||||
using serializer = typename BasicJsonType::template json_serializer<T, void>;
|
||||
|
||||
static constexpr bool value = std::is_integral<decltype(detect(
|
||||
std::declval<typename BasicJsonType::template json_serializer<T, void>>()))>::value;
|
||||
static constexpr bool value =
|
||||
is_detected_exact<void, to_json_function, serializer, BasicJsonType&,
|
||||
T>::value;
|
||||
};
|
||||
|
||||
template <typename BasicJsonType, typename CompatibleCompleteType>
|
||||
struct is_compatible_complete_type
|
||||
template <typename BasicJsonType, typename CompatibleType, typename = void>
|
||||
struct is_compatible_type_impl: std::false_type {};
|
||||
|
||||
template <typename BasicJsonType, typename CompatibleType>
|
||||
struct is_compatible_type_impl <
|
||||
BasicJsonType, CompatibleType,
|
||||
enable_if_t<is_complete_type<CompatibleType>::value >>
|
||||
{
|
||||
static constexpr bool value =
|
||||
not std::is_base_of<std::istream, CompatibleCompleteType>::value and
|
||||
not is_basic_json<CompatibleCompleteType>::value and
|
||||
not is_basic_json_nested_type<BasicJsonType, CompatibleCompleteType>::value and
|
||||
has_to_json<BasicJsonType, CompatibleCompleteType>::value;
|
||||
has_to_json<BasicJsonType, CompatibleType>::value;
|
||||
};
|
||||
|
||||
template <typename BasicJsonType, typename CompatibleType>
|
||||
struct is_compatible_type
|
||||
: conjunction<is_complete_type<CompatibleType>,
|
||||
is_compatible_complete_type<BasicJsonType, CompatibleType>>
|
||||
{
|
||||
};
|
||||
: is_compatible_type_impl<BasicJsonType, CompatibleType> {};
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -4,7 +4,10 @@ namespace nlohmann
|
|||
{
|
||||
namespace detail
|
||||
{
|
||||
template <typename...>
|
||||
using void_t = void;
|
||||
template <typename ...Ts> struct make_void
|
||||
{
|
||||
using type = void;
|
||||
};
|
||||
template <typename ...Ts> using void_t = typename make_void<Ts...>::type;
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1243,7 +1243,7 @@ class basic_json
|
|||
template <typename CompatibleType,
|
||||
typename U = detail::uncvref_t<CompatibleType>,
|
||||
detail::enable_if_t<
|
||||
detail::is_compatible_type<basic_json_t, U>::value, int> = 0>
|
||||
not detail::is_basic_json<U>::value and detail::is_compatible_type<basic_json_t, U>::value, int> = 0>
|
||||
basic_json(CompatibleType && val) noexcept(noexcept(
|
||||
JSONSerializer<U>::to_json(std::declval<basic_json_t&>(),
|
||||
std::forward<CompatibleType>(val))))
|
||||
|
|
|
|||
|
|
@ -218,25 +218,6 @@ using json = basic_json<>;
|
|||
NumberIntegerType, NumberUnsignedType, NumberFloatType, \
|
||||
AllocatorType, JSONSerializer>
|
||||
|
||||
/*!
|
||||
@brief Helper to determine whether there's a key_type for T.
|
||||
|
||||
This helper is used to tell associative containers apart from other containers
|
||||
such as sequence containers. For instance, `std::map` passes the test as it
|
||||
contains a `mapped_type`, whereas `std::vector` fails the test.
|
||||
|
||||
@sa http://stackoverflow.com/a/7728728/266378
|
||||
@since version 1.0.0, overworked in version 2.0.6
|
||||
*/
|
||||
#define NLOHMANN_JSON_HAS_HELPER(type) \
|
||||
template<typename T> struct has_##type { \
|
||||
template<typename U, typename = typename U::type> \
|
||||
static int detect(U &&); \
|
||||
static void detect(...); \
|
||||
static constexpr bool value = \
|
||||
std::is_integral<decltype(detect(std::declval<T>()))>::value; \
|
||||
}
|
||||
|
||||
// #include <nlohmann/detail/meta/cpp_future.hpp>
|
||||
|
||||
|
||||
|
|
@ -286,26 +267,6 @@ template<> struct make_index_sequence<1> : index_sequence<0> {};
|
|||
template<typename... Ts>
|
||||
using index_sequence_for = make_index_sequence<sizeof...(Ts)>;
|
||||
|
||||
/*
|
||||
Implementation of two C++17 constructs: conjunction, negation. This is needed
|
||||
to avoid evaluating all the traits in a condition
|
||||
|
||||
For example: not std::is_same<void, T>::value and has_value_type<T>::value
|
||||
will not compile when T = void (on MSVC at least). Whereas
|
||||
conjunction<negation<std::is_same<void, T>>, has_value_type<T>>::value will
|
||||
stop evaluating if negation<...>::value == false
|
||||
|
||||
Please note that those constructs must be used with caution, since symbols can
|
||||
become very long quickly (which can slow down compilation and cause MSVC
|
||||
internal compiler errors). Only use it when you have to (see example ahead).
|
||||
*/
|
||||
template<class...> struct conjunction : std::true_type {};
|
||||
template<class B1> struct conjunction<B1> : B1 {};
|
||||
template<class B1, class... Bn>
|
||||
struct conjunction<B1, Bn...> : std::conditional<bool(B1::value), conjunction<Bn...>, B1>::type {};
|
||||
|
||||
template<class B> struct negation : std::integral_constant<bool, not B::value> {};
|
||||
|
||||
// dispatch utility (taken from ranges-v3)
|
||||
template<unsigned N> struct priority_tag : priority_tag < N - 1 > {};
|
||||
template<> struct priority_tag<0> {};
|
||||
|
|
@ -334,6 +295,78 @@ constexpr T static_const<T>::value;
|
|||
|
||||
// #include <nlohmann/detail/meta/cpp_future.hpp>
|
||||
|
||||
// #include <nlohmann/detail/meta/detected.hpp>
|
||||
|
||||
|
||||
#include <type_traits>
|
||||
|
||||
// #include <nlohmann/detail/meta/void_t.hpp>
|
||||
|
||||
|
||||
namespace nlohmann
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
template <typename ...Ts> struct make_void
|
||||
{
|
||||
using type = void;
|
||||
};
|
||||
template <typename ...Ts> using void_t = typename make_void<Ts...>::type;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// http://en.cppreference.com/w/cpp/experimental/is_detected
|
||||
namespace nlohmann
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
struct nonesuch
|
||||
{
|
||||
nonesuch() = delete;
|
||||
~nonesuch() = delete;
|
||||
nonesuch(nonesuch const&) = delete;
|
||||
void operator=(nonesuch const&) = delete;
|
||||
};
|
||||
|
||||
template <class Default,
|
||||
class AlwaysVoid,
|
||||
template <class...> class Op,
|
||||
class... Args>
|
||||
struct detector
|
||||
{
|
||||
using value_t = std::false_type;
|
||||
using type = Default;
|
||||
};
|
||||
|
||||
template <class Default, template <class...> class Op, class... Args>
|
||||
struct detector<Default, void_t<Op<Args...>>, Op, Args...>
|
||||
{
|
||||
using value_t = std::true_type;
|
||||
using type = Op<Args...>;
|
||||
};
|
||||
|
||||
template <template <class...> class Op, class... Args>
|
||||
using is_detected = typename detector<nonesuch, void, Op, Args...>::value_t;
|
||||
|
||||
template <template <class...> class Op, class... Args>
|
||||
using detected_t = typename detector<nonesuch, void, Op, Args...>::type;
|
||||
|
||||
template <class Default, template <class...> class Op, class... Args>
|
||||
using detected_or = detector<Default, void, Op, Args...>;
|
||||
|
||||
template <class Default, template <class...> class Op, class... Args>
|
||||
using detected_or_t = typename detected_or<Default, Op, Args...>::type;
|
||||
|
||||
template <class Expected, template <class...> class Op, class... Args>
|
||||
using is_detected_exact = std::is_same<Expected, detected_t<Op, Args...>>;
|
||||
|
||||
template <class To, template <class...> class Op, class... Args>
|
||||
using is_detected_convertible =
|
||||
std::is_convertible<detected_t<Op, Args...>, To>;
|
||||
}
|
||||
}
|
||||
|
||||
// #include <nlohmann/detail/macro_scope.hpp>
|
||||
|
||||
|
||||
|
|
@ -358,9 +391,61 @@ template<typename> struct is_basic_json : std::false_type {};
|
|||
NLOHMANN_BASIC_JSON_TPL_DECLARATION
|
||||
struct is_basic_json<NLOHMANN_BASIC_JSON_TPL> : std::true_type {};
|
||||
|
||||
////////////////////////
|
||||
// has_/is_ functions //
|
||||
////////////////////////
|
||||
//////////////////////////
|
||||
// aliases for detected //
|
||||
//////////////////////////
|
||||
|
||||
template <typename T>
|
||||
using mapped_type_t = typename T::mapped_type;
|
||||
|
||||
template <typename T>
|
||||
using key_type_t = typename T::key_type;
|
||||
|
||||
template <typename T>
|
||||
using value_type_t = typename T::value_type;
|
||||
|
||||
template <typename T>
|
||||
using difference_type_t = typename T::difference_type;
|
||||
|
||||
template <typename T>
|
||||
using pointer_t = typename T::pointer;
|
||||
|
||||
template <typename T>
|
||||
using reference_t = typename T::reference;
|
||||
|
||||
template <typename T>
|
||||
using iterator_category_t = typename T::iterator_category;
|
||||
|
||||
template <typename T>
|
||||
using iterator_t = typename T::iterator;
|
||||
|
||||
template <typename T, typename... Args>
|
||||
using to_json_function = decltype(T::to_json(std::declval<Args>()...));
|
||||
|
||||
template <typename T, typename... Args>
|
||||
using from_json_function = decltype(T::from_json(std::declval<Args>()...));
|
||||
|
||||
///////////////////
|
||||
// is_ functions //
|
||||
///////////////////
|
||||
|
||||
template <typename T, typename = void>
|
||||
struct is_iterator_traits : std::false_type {};
|
||||
|
||||
template <typename T>
|
||||
struct is_iterator_traits<std::iterator_traits<T>>
|
||||
{
|
||||
private:
|
||||
using traits = std::iterator_traits<T>;
|
||||
|
||||
public:
|
||||
static constexpr auto value =
|
||||
is_detected<value_type_t, traits>::value &&
|
||||
is_detected<difference_type_t, traits>::value &&
|
||||
is_detected<pointer_t, traits>::value &&
|
||||
is_detected<iterator_category_t, traits>::value &&
|
||||
is_detected<reference_t, traits>::value;
|
||||
};
|
||||
|
||||
// source: https://stackoverflow.com/a/37193089/4116453
|
||||
|
||||
|
|
@ -370,113 +455,104 @@ struct is_complete_type : std::false_type {};
|
|||
template <typename T>
|
||||
struct is_complete_type<T, decltype(void(sizeof(T)))> : std::true_type {};
|
||||
|
||||
NLOHMANN_JSON_HAS_HELPER(mapped_type);
|
||||
NLOHMANN_JSON_HAS_HELPER(key_type);
|
||||
NLOHMANN_JSON_HAS_HELPER(value_type);
|
||||
NLOHMANN_JSON_HAS_HELPER(iterator);
|
||||
|
||||
template<bool B, class RealType, class CompatibleObjectType>
|
||||
template <typename BasicJsonType, typename CompatibleObjectType,
|
||||
typename = void>
|
||||
struct is_compatible_object_type_impl : std::false_type {};
|
||||
|
||||
template<class RealType, class CompatibleObjectType>
|
||||
struct is_compatible_object_type_impl<true, RealType, CompatibleObjectType>
|
||||
template <typename BasicJsonType, typename CompatibleObjectType>
|
||||
struct is_compatible_object_type_impl <
|
||||
BasicJsonType, CompatibleObjectType,
|
||||
enable_if_t<is_detected<mapped_type_t, CompatibleObjectType>::value and
|
||||
is_detected<key_type_t, CompatibleObjectType>::value >>
|
||||
{
|
||||
static constexpr auto value =
|
||||
std::is_constructible<typename RealType::key_type, typename CompatibleObjectType::key_type>::value and
|
||||
std::is_constructible<typename RealType::mapped_type, typename CompatibleObjectType::mapped_type>::value;
|
||||
|
||||
using object_t = typename BasicJsonType::object_t;
|
||||
|
||||
// macOS's is_constructible does not play well with nonesuch...
|
||||
static constexpr bool value =
|
||||
std::is_constructible<typename object_t::key_type,
|
||||
typename CompatibleObjectType::key_type>::value and
|
||||
std::is_constructible<typename object_t::mapped_type,
|
||||
typename CompatibleObjectType::mapped_type>::value;
|
||||
};
|
||||
|
||||
template<bool B, class RealType, class CompatibleStringType>
|
||||
template <typename BasicJsonType, typename CompatibleObjectType>
|
||||
struct is_compatible_object_type
|
||||
: is_compatible_object_type_impl<BasicJsonType, CompatibleObjectType> {};
|
||||
|
||||
template <typename BasicJsonType, typename CompatibleStringType,
|
||||
typename = void>
|
||||
struct is_compatible_string_type_impl : std::false_type {};
|
||||
|
||||
template<class RealType, class CompatibleStringType>
|
||||
struct is_compatible_string_type_impl<true, RealType, CompatibleStringType>
|
||||
template <typename BasicJsonType, typename CompatibleStringType>
|
||||
struct is_compatible_string_type_impl <
|
||||
BasicJsonType, CompatibleStringType,
|
||||
enable_if_t<is_detected_exact<typename BasicJsonType::string_t::value_type,
|
||||
value_type_t, CompatibleStringType>::value >>
|
||||
{
|
||||
static constexpr auto value =
|
||||
std::is_same<typename RealType::value_type, typename CompatibleStringType::value_type>::value and
|
||||
std::is_constructible<RealType, CompatibleStringType>::value;
|
||||
std::is_constructible<typename BasicJsonType::string_t, CompatibleStringType>::value;
|
||||
};
|
||||
|
||||
template<class BasicJsonType, class CompatibleObjectType>
|
||||
struct is_compatible_object_type
|
||||
{
|
||||
static auto constexpr value = is_compatible_object_type_impl <
|
||||
conjunction<negation<std::is_same<void, CompatibleObjectType>>,
|
||||
has_mapped_type<CompatibleObjectType>,
|
||||
has_key_type<CompatibleObjectType>>::value,
|
||||
typename BasicJsonType::object_t, CompatibleObjectType >::value;
|
||||
};
|
||||
|
||||
template<class BasicJsonType, class CompatibleStringType>
|
||||
template <typename BasicJsonType, typename CompatibleStringType>
|
||||
struct is_compatible_string_type
|
||||
: is_compatible_string_type_impl<BasicJsonType, CompatibleStringType> {};
|
||||
|
||||
template <typename BasicJsonType, typename CompatibleArrayType, typename = void>
|
||||
struct is_compatible_array_type_impl : std::false_type {};
|
||||
|
||||
template <typename BasicJsonType, typename CompatibleArrayType>
|
||||
struct is_compatible_array_type_impl <
|
||||
BasicJsonType, CompatibleArrayType,
|
||||
enable_if_t<is_detected<value_type_t, CompatibleArrayType>::value and
|
||||
is_detected<iterator_t, CompatibleArrayType>::value >>
|
||||
{
|
||||
static auto constexpr value = is_compatible_string_type_impl <
|
||||
conjunction<negation<std::is_same<void, CompatibleStringType>>,
|
||||
has_value_type<CompatibleStringType>>::value,
|
||||
typename BasicJsonType::string_t, CompatibleStringType >::value;
|
||||
// This is needed because json_reverse_iterator has a ::iterator type...
|
||||
// Therefore it is detected as a CompatibleArrayType.
|
||||
// The real fix would be to have an Iterable concept.
|
||||
static constexpr bool value = not is_iterator_traits<std::iterator_traits<CompatibleArrayType>>::value;
|
||||
};
|
||||
|
||||
template<typename BasicJsonType, typename T>
|
||||
struct is_basic_json_nested_type
|
||||
{
|
||||
static auto constexpr value = std::is_same<T, typename BasicJsonType::iterator>::value or
|
||||
std::is_same<T, typename BasicJsonType::const_iterator>::value or
|
||||
std::is_same<T, typename BasicJsonType::reverse_iterator>::value or
|
||||
std::is_same<T, typename BasicJsonType::const_reverse_iterator>::value;
|
||||
};
|
||||
|
||||
template<class BasicJsonType, class CompatibleArrayType>
|
||||
template <typename BasicJsonType, typename CompatibleArrayType>
|
||||
struct is_compatible_array_type
|
||||
{
|
||||
static auto constexpr value =
|
||||
conjunction<negation<std::is_same<void, CompatibleArrayType>>,
|
||||
negation<is_compatible_object_type<
|
||||
BasicJsonType, CompatibleArrayType>>,
|
||||
negation<std::is_constructible<typename BasicJsonType::string_t,
|
||||
CompatibleArrayType>>,
|
||||
negation<is_basic_json_nested_type<BasicJsonType, CompatibleArrayType>>,
|
||||
has_value_type<CompatibleArrayType>,
|
||||
has_iterator<CompatibleArrayType>>::value;
|
||||
};
|
||||
: is_compatible_array_type_impl<BasicJsonType, CompatibleArrayType> {};
|
||||
|
||||
template<bool, typename, typename>
|
||||
template <typename RealIntegerType, typename CompatibleNumberIntegerType,
|
||||
typename = void>
|
||||
struct is_compatible_integer_type_impl : std::false_type {};
|
||||
|
||||
template<typename RealIntegerType, typename CompatibleNumberIntegerType>
|
||||
struct is_compatible_integer_type_impl<true, RealIntegerType, CompatibleNumberIntegerType>
|
||||
template <typename RealIntegerType, typename CompatibleNumberIntegerType>
|
||||
struct is_compatible_integer_type_impl <
|
||||
RealIntegerType, CompatibleNumberIntegerType,
|
||||
enable_if_t<std::is_integral<RealIntegerType>::value and
|
||||
std::is_integral<CompatibleNumberIntegerType>::value and
|
||||
not std::is_same<bool, CompatibleNumberIntegerType>::value >>
|
||||
{
|
||||
// is there an assert somewhere on overflows?
|
||||
using RealLimits = std::numeric_limits<RealIntegerType>;
|
||||
using CompatibleLimits = std::numeric_limits<CompatibleNumberIntegerType>;
|
||||
|
||||
static constexpr auto value =
|
||||
std::is_constructible<RealIntegerType, CompatibleNumberIntegerType>::value and
|
||||
std::is_constructible<RealIntegerType,
|
||||
CompatibleNumberIntegerType>::value and
|
||||
CompatibleLimits::is_integer and
|
||||
RealLimits::is_signed == CompatibleLimits::is_signed;
|
||||
};
|
||||
|
||||
template<typename RealIntegerType, typename CompatibleNumberIntegerType>
|
||||
template <typename RealIntegerType, typename CompatibleNumberIntegerType>
|
||||
struct is_compatible_integer_type
|
||||
{
|
||||
static constexpr auto value =
|
||||
is_compatible_integer_type_impl <
|
||||
std::is_integral<CompatibleNumberIntegerType>::value and
|
||||
not std::is_same<bool, CompatibleNumberIntegerType>::value,
|
||||
RealIntegerType, CompatibleNumberIntegerType > ::value;
|
||||
};
|
||||
: is_compatible_integer_type_impl<RealIntegerType,
|
||||
CompatibleNumberIntegerType> {};
|
||||
|
||||
// trait checking if JSONSerializer<T>::from_json(json const&, udt&) exists
|
||||
template<typename BasicJsonType, typename T>
|
||||
struct has_from_json
|
||||
{
|
||||
// also check the return type of from_json
|
||||
template<typename U, typename = enable_if_t<std::is_same<void, decltype(uncvref_t<U>::from_json(
|
||||
std::declval<BasicJsonType>(), std::declval<T&>()))>::value>>
|
||||
static int detect(U&&);
|
||||
static void detect(...);
|
||||
using serializer = typename BasicJsonType::template json_serializer<T, void>;
|
||||
|
||||
static constexpr bool value = std::is_integral<decltype(
|
||||
detect(std::declval<typename BasicJsonType::template json_serializer<T, void>>()))>::value;
|
||||
static constexpr bool value =
|
||||
is_detected_exact<void, from_json_function, serializer,
|
||||
const BasicJsonType&, T&>::value;
|
||||
};
|
||||
|
||||
// This trait checks if JSONSerializer<T>::from_json(json const&) exists
|
||||
|
|
@ -484,46 +560,39 @@ struct has_from_json
|
|||
template<typename BasicJsonType, typename T>
|
||||
struct has_non_default_from_json
|
||||
{
|
||||
template <
|
||||
typename U,
|
||||
typename = enable_if_t<std::is_same<
|
||||
T, decltype(uncvref_t<U>::from_json(std::declval<BasicJsonType>()))>::value >>
|
||||
static int detect(U&&);
|
||||
static void detect(...);
|
||||
using serializer = typename BasicJsonType::template json_serializer<T, void>;
|
||||
|
||||
static constexpr bool value = std::is_integral<decltype(detect(
|
||||
std::declval<typename BasicJsonType::template json_serializer<T, void>>()))>::value;
|
||||
static constexpr bool value =
|
||||
is_detected_exact<T, from_json_function, serializer,
|
||||
const BasicJsonType&>::value;
|
||||
};
|
||||
|
||||
// This trait checks if BasicJsonType::json_serializer<T>::to_json exists
|
||||
template<typename BasicJsonType, typename T>
|
||||
struct has_to_json
|
||||
{
|
||||
template<typename U, typename = decltype(uncvref_t<U>::to_json(
|
||||
std::declval<BasicJsonType&>(), std::declval<T>()))>
|
||||
static int detect(U&&);
|
||||
static void detect(...);
|
||||
using serializer = typename BasicJsonType::template json_serializer<T, void>;
|
||||
|
||||
static constexpr bool value = std::is_integral<decltype(detect(
|
||||
std::declval<typename BasicJsonType::template json_serializer<T, void>>()))>::value;
|
||||
static constexpr bool value =
|
||||
is_detected_exact<void, to_json_function, serializer, BasicJsonType&,
|
||||
T>::value;
|
||||
};
|
||||
|
||||
template <typename BasicJsonType, typename CompatibleCompleteType>
|
||||
struct is_compatible_complete_type
|
||||
template <typename BasicJsonType, typename CompatibleType, typename = void>
|
||||
struct is_compatible_type_impl: std::false_type {};
|
||||
|
||||
template <typename BasicJsonType, typename CompatibleType>
|
||||
struct is_compatible_type_impl <
|
||||
BasicJsonType, CompatibleType,
|
||||
enable_if_t<is_complete_type<CompatibleType>::value >>
|
||||
{
|
||||
static constexpr bool value =
|
||||
not std::is_base_of<std::istream, CompatibleCompleteType>::value and
|
||||
not is_basic_json<CompatibleCompleteType>::value and
|
||||
not is_basic_json_nested_type<BasicJsonType, CompatibleCompleteType>::value and
|
||||
has_to_json<BasicJsonType, CompatibleCompleteType>::value;
|
||||
has_to_json<BasicJsonType, CompatibleType>::value;
|
||||
};
|
||||
|
||||
template <typename BasicJsonType, typename CompatibleType>
|
||||
struct is_compatible_type
|
||||
: conjunction<is_complete_type<CompatibleType>,
|
||||
is_compatible_complete_type<BasicJsonType, CompatibleType>>
|
||||
{
|
||||
};
|
||||
: is_compatible_type_impl<BasicJsonType, CompatibleType> {};
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -1072,16 +1141,6 @@ void from_json(const BasicJsonType& j, EnumType& e)
|
|||
e = static_cast<EnumType>(val);
|
||||
}
|
||||
|
||||
template<typename BasicJsonType>
|
||||
void from_json(const BasicJsonType& j, typename BasicJsonType::array_t& arr)
|
||||
{
|
||||
if (JSON_UNLIKELY(not j.is_array()))
|
||||
{
|
||||
JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name())));
|
||||
}
|
||||
arr = *j.template get_ptr<const typename BasicJsonType::array_t*>();
|
||||
}
|
||||
|
||||
// forward_list doesn't have an insert method
|
||||
template<typename BasicJsonType, typename T, typename Allocator,
|
||||
enable_if_t<std::is_convertible<BasicJsonType, T>::value, int> = 0>
|
||||
|
|
@ -1111,24 +1170,28 @@ void from_json(const BasicJsonType& j, std::valarray<T>& l)
|
|||
std::copy(j.m_value.array->begin(), j.m_value.array->end(), std::begin(l));
|
||||
}
|
||||
|
||||
template<typename BasicJsonType, typename CompatibleArrayType>
|
||||
void from_json_array_impl(const BasicJsonType& j, CompatibleArrayType& arr, priority_tag<0> /*unused*/)
|
||||
template<typename BasicJsonType>
|
||||
void from_json_array_impl(const BasicJsonType& j, typename BasicJsonType::array_t& arr, priority_tag<3> /*unused*/)
|
||||
{
|
||||
using std::end;
|
||||
arr = *j.template get_ptr<const typename BasicJsonType::array_t*>();
|
||||
}
|
||||
|
||||
std::transform(j.begin(), j.end(),
|
||||
std::inserter(arr, end(arr)), [](const BasicJsonType & i)
|
||||
template <typename BasicJsonType, typename T, std::size_t N>
|
||||
auto from_json_array_impl(const BasicJsonType& j, std::array<T, N>& arr,
|
||||
priority_tag<2> /*unused*/)
|
||||
-> decltype(j.template get<T>(), void())
|
||||
{
|
||||
for (std::size_t i = 0; i < N; ++i)
|
||||
{
|
||||
// get<BasicJsonType>() returns *this, this won't call a from_json
|
||||
// method when value_type is BasicJsonType
|
||||
return i.template get<typename CompatibleArrayType::value_type>();
|
||||
});
|
||||
arr[i] = j.at(i).template get<T>();
|
||||
}
|
||||
}
|
||||
|
||||
template<typename BasicJsonType, typename CompatibleArrayType>
|
||||
auto from_json_array_impl(const BasicJsonType& j, CompatibleArrayType& arr, priority_tag<1> /*unused*/)
|
||||
-> decltype(
|
||||
arr.reserve(std::declval<typename CompatibleArrayType::size_type>()),
|
||||
j.template get<typename CompatibleArrayType::value_type>(),
|
||||
void())
|
||||
{
|
||||
using std::end;
|
||||
|
|
@ -1143,25 +1206,34 @@ auto from_json_array_impl(const BasicJsonType& j, CompatibleArrayType& arr, prio
|
|||
});
|
||||
}
|
||||
|
||||
template<typename BasicJsonType, typename T, std::size_t N>
|
||||
void from_json_array_impl(const BasicJsonType& j, std::array<T, N>& arr, priority_tag<2> /*unused*/)
|
||||
template <typename BasicJsonType, typename CompatibleArrayType>
|
||||
void from_json_array_impl(const BasicJsonType& j, CompatibleArrayType& arr,
|
||||
priority_tag<0> /*unused*/)
|
||||
{
|
||||
for (std::size_t i = 0; i < N; ++i)
|
||||
using std::end;
|
||||
|
||||
std::transform(
|
||||
j.begin(), j.end(), std::inserter(arr, end(arr)),
|
||||
[](const BasicJsonType & i)
|
||||
{
|
||||
arr[i] = j.at(i).template get<T>();
|
||||
}
|
||||
// get<BasicJsonType>() returns *this, this won't call a from_json
|
||||
// method when value_type is BasicJsonType
|
||||
return i.template get<typename CompatibleArrayType::value_type>();
|
||||
});
|
||||
}
|
||||
|
||||
template <
|
||||
typename BasicJsonType, typename CompatibleArrayType,
|
||||
enable_if_t <
|
||||
is_compatible_array_type<BasicJsonType, CompatibleArrayType>::value and
|
||||
not std::is_same<typename BasicJsonType::array_t,
|
||||
CompatibleArrayType>::value and
|
||||
std::is_constructible <
|
||||
BasicJsonType, typename CompatibleArrayType::value_type >::value,
|
||||
int > = 0 >
|
||||
void from_json(const BasicJsonType& j, CompatibleArrayType& arr)
|
||||
template <typename BasicJsonType, typename CompatibleArrayType,
|
||||
enable_if_t <
|
||||
is_compatible_array_type<BasicJsonType, CompatibleArrayType>::value and
|
||||
not is_compatible_object_type<BasicJsonType, CompatibleArrayType>::value and
|
||||
not is_compatible_string_type<BasicJsonType, CompatibleArrayType>::value and
|
||||
not is_basic_json<CompatibleArrayType>::value,
|
||||
int > = 0 >
|
||||
|
||||
auto from_json(const BasicJsonType& j, CompatibleArrayType& arr)
|
||||
-> decltype(from_json_array_impl(j, arr, priority_tag<3> {}),
|
||||
j.template get<typename CompatibleArrayType::value_type>(),
|
||||
void())
|
||||
{
|
||||
if (JSON_UNLIKELY(not j.is_array()))
|
||||
{
|
||||
|
|
@ -1169,7 +1241,7 @@ void from_json(const BasicJsonType& j, CompatibleArrayType& arr)
|
|||
std::string(j.type_name())));
|
||||
}
|
||||
|
||||
from_json_array_impl(j, arr, priority_tag<2> {});
|
||||
from_json_array_impl(j, arr, priority_tag<3> {});
|
||||
}
|
||||
|
||||
template<typename BasicJsonType, typename CompatibleObjectType,
|
||||
|
|
@ -1292,35 +1364,13 @@ void from_json(const BasicJsonType& j, std::unordered_map<Key, Value, Hash, KeyE
|
|||
|
||||
struct from_json_fn
|
||||
{
|
||||
private:
|
||||
template<typename BasicJsonType, typename T>
|
||||
auto call(const BasicJsonType& j, T& val, priority_tag<1> /*unused*/) const
|
||||
auto operator()(const BasicJsonType& j, T& val) const
|
||||
noexcept(noexcept(from_json(j, val)))
|
||||
-> decltype(from_json(j, val), void())
|
||||
{
|
||||
return from_json(j, val);
|
||||
}
|
||||
|
||||
template<typename BasicJsonType, typename T>
|
||||
void call(const BasicJsonType& /*unused*/, T& /*unused*/, priority_tag<0> /*unused*/) const noexcept
|
||||
{
|
||||
static_assert(sizeof(BasicJsonType) == 0,
|
||||
"could not find from_json() method in T's namespace");
|
||||
#ifdef _MSC_VER
|
||||
// MSVC does not show a stacktrace for the above assert
|
||||
using decayed = uncvref_t<T>;
|
||||
static_assert(sizeof(typename decayed::force_msvc_stacktrace) == 0,
|
||||
"forcing MSVC stacktrace to show which T we're talking about.");
|
||||
#endif
|
||||
}
|
||||
|
||||
public:
|
||||
template<typename BasicJsonType, typename T>
|
||||
void operator()(const BasicJsonType& j, T& val) const
|
||||
noexcept(noexcept(std::declval<from_json_fn>().call(j, val, priority_tag<1> {})))
|
||||
{
|
||||
return call(j, val, priority_tag<1> {});
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
|
|
@ -1717,10 +1767,14 @@ void to_json(BasicJsonType& j, const std::vector<bool>& e)
|
|||
external_constructor<value_t::array>::construct(j, e);
|
||||
}
|
||||
|
||||
template<typename BasicJsonType, typename CompatibleArrayType,
|
||||
enable_if_t<is_compatible_array_type<BasicJsonType, CompatibleArrayType>::value or
|
||||
std::is_same<typename BasicJsonType::array_t, CompatibleArrayType>::value,
|
||||
int> = 0>
|
||||
template <typename BasicJsonType, typename CompatibleArrayType,
|
||||
enable_if_t<is_compatible_array_type<BasicJsonType,
|
||||
CompatibleArrayType>::value and
|
||||
not is_compatible_object_type<
|
||||
BasicJsonType, CompatibleArrayType>::value and
|
||||
not is_compatible_string_type<BasicJsonType, CompatibleArrayType>::value and
|
||||
not is_basic_json<CompatibleArrayType>::value,
|
||||
int> = 0>
|
||||
void to_json(BasicJsonType& j, const CompatibleArrayType& arr)
|
||||
{
|
||||
external_constructor<value_t::array>::construct(j, arr);
|
||||
|
|
@ -1740,7 +1794,7 @@ void to_json(BasicJsonType& j, typename BasicJsonType::array_t&& arr)
|
|||
}
|
||||
|
||||
template<typename BasicJsonType, typename CompatibleObjectType,
|
||||
enable_if_t<is_compatible_object_type<BasicJsonType, CompatibleObjectType>::value, int> = 0>
|
||||
enable_if_t<is_compatible_object_type<BasicJsonType, CompatibleObjectType>::value and not is_basic_json<CompatibleObjectType>::value, int> = 0>
|
||||
void to_json(BasicJsonType& j, const CompatibleObjectType& obj)
|
||||
{
|
||||
external_constructor<value_t::object>::construct(j, obj);
|
||||
|
|
@ -1752,9 +1806,12 @@ void to_json(BasicJsonType& j, typename BasicJsonType::object_t&& obj)
|
|||
external_constructor<value_t::object>::construct(j, std::move(obj));
|
||||
}
|
||||
|
||||
template<typename BasicJsonType, typename T, std::size_t N,
|
||||
enable_if_t<not std::is_constructible<typename BasicJsonType::string_t, T (&)[N]>::value, int> = 0>
|
||||
void to_json(BasicJsonType& j, T (&arr)[N])
|
||||
template <
|
||||
typename BasicJsonType, typename T, std::size_t N,
|
||||
enable_if_t<not std::is_constructible<typename BasicJsonType::string_t,
|
||||
const T (&)[N]>::value,
|
||||
int> = 0 >
|
||||
void to_json(BasicJsonType& j, const T (&arr)[N])
|
||||
{
|
||||
external_constructor<value_t::array>::construct(j, arr);
|
||||
}
|
||||
|
|
@ -1787,35 +1844,12 @@ void to_json(BasicJsonType& j, const std::tuple<Args...>& t)
|
|||
|
||||
struct to_json_fn
|
||||
{
|
||||
private:
|
||||
template<typename BasicJsonType, typename T>
|
||||
auto call(BasicJsonType& j, T&& val, priority_tag<1> /*unused*/) const noexcept(noexcept(to_json(j, std::forward<T>(val))))
|
||||
auto operator()(BasicJsonType& j, T&& val) const noexcept(noexcept(to_json(j, std::forward<T>(val))))
|
||||
-> decltype(to_json(j, std::forward<T>(val)), void())
|
||||
{
|
||||
return to_json(j, std::forward<T>(val));
|
||||
}
|
||||
|
||||
template<typename BasicJsonType, typename T>
|
||||
void call(BasicJsonType& /*unused*/, T&& /*unused*/, priority_tag<0> /*unused*/) const noexcept
|
||||
{
|
||||
static_assert(sizeof(BasicJsonType) == 0,
|
||||
"could not find to_json() method in T's namespace");
|
||||
|
||||
#ifdef _MSC_VER
|
||||
// MSVC does not show a stacktrace for the above assert
|
||||
using decayed = uncvref_t<T>;
|
||||
static_assert(sizeof(typename decayed::force_msvc_stacktrace) == 0,
|
||||
"forcing MSVC stacktrace to show which T we're talking about.");
|
||||
#endif
|
||||
}
|
||||
|
||||
public:
|
||||
template<typename BasicJsonType, typename T>
|
||||
void operator()(BasicJsonType& j, T&& val) const
|
||||
noexcept(noexcept(std::declval<to_json_fn>().call(j, std::forward<T>(val), priority_tag<1> {})))
|
||||
{
|
||||
return call(j, std::forward<T>(val), priority_tag<1> {});
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
|
|
@ -3562,73 +3596,6 @@ scan_number_done:
|
|||
|
||||
// #include <nlohmann/detail/meta/detected.hpp>
|
||||
|
||||
|
||||
#include <type_traits>
|
||||
|
||||
// #include <nlohmann/detail/meta/void_t.hpp>
|
||||
|
||||
|
||||
namespace nlohmann
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
template <typename...>
|
||||
using void_t = void;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// http://en.cppreference.com/w/cpp/experimental/is_detected
|
||||
namespace nlohmann
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
struct nonesuch
|
||||
{
|
||||
nonesuch() = delete;
|
||||
~nonesuch() = delete;
|
||||
nonesuch(nonesuch const&) = delete;
|
||||
void operator=(nonesuch const&) = delete;
|
||||
};
|
||||
|
||||
template <class Default,
|
||||
class AlwaysVoid,
|
||||
template <class...> class Op,
|
||||
class... Args>
|
||||
struct detector
|
||||
{
|
||||
using value_t = std::false_type;
|
||||
using type = Default;
|
||||
};
|
||||
|
||||
template <class Default, template <class...> class Op, class... Args>
|
||||
struct detector<Default, void_t<Op<Args...>>, Op, Args...>
|
||||
{
|
||||
using value_t = std::true_type;
|
||||
using type = Op<Args...>;
|
||||
};
|
||||
|
||||
template <template <class...> class Op, class... Args>
|
||||
using is_detected = typename detector<nonesuch, void, Op, Args...>::value_t;
|
||||
|
||||
template <template <class...> class Op, class... Args>
|
||||
using detected_t = typename detector<nonesuch, void, Op, Args...>::type;
|
||||
|
||||
template <class Default, template <class...> class Op, class... Args>
|
||||
using detected_or = detector<Default, void, Op, Args...>;
|
||||
|
||||
template <class Default, template <class...> class Op, class... Args>
|
||||
using detected_or_t = typename detected_or<Default, Op, Args...>::type;
|
||||
|
||||
template <class Expected, template <class...> class Op, class... Args>
|
||||
using is_detected_exact = std::is_same<Expected, detected_t<Op, Args...>>;
|
||||
|
||||
template <class To, template <class...> class Op, class... Args>
|
||||
using is_detected_convertible =
|
||||
std::is_convertible<detected_t<Op, Args...>, To>;
|
||||
}
|
||||
}
|
||||
|
||||
// #include <nlohmann/detail/meta/type_traits.hpp>
|
||||
|
||||
|
||||
|
|
@ -11144,8 +11111,10 @@ struct adl_serializer
|
|||
@param[in,out] val value to write to
|
||||
*/
|
||||
template<typename BasicJsonType, typename ValueType>
|
||||
static void from_json(BasicJsonType&& j, ValueType& val) noexcept(
|
||||
noexcept(::nlohmann::from_json(std::forward<BasicJsonType>(j), val)))
|
||||
static auto from_json(BasicJsonType&& j, ValueType& val) noexcept(
|
||||
noexcept(::nlohmann::from_json(std::forward<BasicJsonType>(j), val))) -> decltype(
|
||||
::nlohmann::from_json(std::forward<BasicJsonType>(j), val), void()
|
||||
)
|
||||
{
|
||||
::nlohmann::from_json(std::forward<BasicJsonType>(j), val);
|
||||
}
|
||||
|
|
@ -11159,9 +11128,11 @@ struct adl_serializer
|
|||
@param[in,out] j JSON value to write to
|
||||
@param[in] val value to read from
|
||||
*/
|
||||
template<typename BasicJsonType, typename ValueType>
|
||||
static void to_json(BasicJsonType& j, ValueType&& val) noexcept(
|
||||
template <typename BasicJsonType, typename ValueType>
|
||||
static auto to_json(BasicJsonType& j, ValueType&& val) noexcept(
|
||||
noexcept(::nlohmann::to_json(j, std::forward<ValueType>(val))))
|
||||
-> decltype(::nlohmann::to_json(j, std::forward<ValueType>(val)),
|
||||
void())
|
||||
{
|
||||
::nlohmann::to_json(j, std::forward<ValueType>(val));
|
||||
}
|
||||
|
|
@ -12342,7 +12313,7 @@ class basic_json
|
|||
template <typename CompatibleType,
|
||||
typename U = detail::uncvref_t<CompatibleType>,
|
||||
detail::enable_if_t<
|
||||
detail::is_compatible_type<basic_json_t, U>::value, int> = 0>
|
||||
not detail::is_basic_json<U>::value and detail::is_compatible_type<basic_json_t, U>::value, int> = 0>
|
||||
basic_json(CompatibleType && val) noexcept(noexcept(
|
||||
JSONSerializer<U>::to_json(std::declval<basic_json_t&>(),
|
||||
std::forward<CompatibleType>(val))))
|
||||
|
|
@ -18899,7 +18870,6 @@ inline nlohmann::json::json_pointer operator "" _json_pointer(const char* s, std
|
|||
#undef JSON_HAS_CPP_17
|
||||
#undef NLOHMANN_BASIC_JSON_TPL_DECLARATION
|
||||
#undef NLOHMANN_BASIC_JSON_TPL
|
||||
#undef NLOHMANN_JSON_HAS_HELPER
|
||||
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -317,8 +317,8 @@ TEST_CASE("object inspection")
|
|||
SECTION("round trips")
|
||||
{
|
||||
for (const auto& s :
|
||||
{"3.141592653589793", "1000000000000000010E5"
|
||||
})
|
||||
{"3.141592653589793", "1000000000000000010E5"
|
||||
})
|
||||
{
|
||||
json j1 = json::parse(s);
|
||||
std::string s1 = j1.dump();
|
||||
|
|
|
|||
Loading…
Reference in a new issue