add is_compatible_* traits
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Théo DELRIEU
Théo DELRIEU
parent
178441cdfd
commit
23bd2bce35
2 changed files with 106 additions and 34 deletions
124
src/json.hpp
124
src/json.hpp
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@ -150,6 +150,96 @@ struct has_mapped_type
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std::is_integral<decltype(detect(std::declval<T>()))>::value;
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};
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template<typename T>
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struct has_key_type
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{
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private:
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template <typename U, typename = typename U::key_type>
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static int detect(U&&);
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static void detect(...);
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public:
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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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template<typename T>
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struct has_value_type
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{
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private:
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template <typename U, typename = typename U::value_type>
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static int detect(U&&);
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static void detect(...);
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public:
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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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template <bool B, class RealType, class CompatibleObjectType>
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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>
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{
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static constexpr auto value =
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std::is_constructible<typename RealType::key_type, typename CompatibleObjectType::key_type>::value and
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std::is_constructible<typename RealType::mapped_type, typename CompatibleObjectType::mapped_type>::value;
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};
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template<class RealType, class CompatibleObjectType, typename = enable_if_t<has_mapped_type<CompatibleObjectType>::value and has_key_type<CompatibleObjectType>::value>>
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struct is_compatible_object_type
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{
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static auto constexpr value = is_compatible_object_type_impl<has_mapped_type<CompatibleObjectType>::value and has_key_type<CompatibleObjectType>::value, RealType, CompatibleObjectType>::value;
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};
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template <bool B, class BasicJson, class CompatibleArrayType>
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struct is_compatible_array_type_impl : std::false_type{};
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template <class BasicJson, class CompatibleArrayType>
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struct is_compatible_array_type_impl<true, BasicJson, CompatibleArrayType>
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{
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static constexpr auto value =
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not std::is_same<CompatibleArrayType, typename BasicJson::iterator>::value and
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not std::is_same<CompatibleArrayType, typename BasicJson::const_iterator>::value and
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not std::is_same<CompatibleArrayType, typename BasicJson::reverse_iterator>::value and
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not std::is_same<CompatibleArrayType, typename BasicJson::const_reverse_iterator>::value and
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not std::is_same<CompatibleArrayType, typename BasicJson::array_t::iterator>::value and
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not std::is_same<CompatibleArrayType, typename BasicJson::array_t::const_iterator>::value and
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std::is_constructible<BasicJson, typename CompatibleArrayType::value_type>::value;
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};
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template <class BasicJson, class CompatibleArrayType>
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struct is_compatible_array_type
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{
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static auto constexpr value = is_compatible_array_type_impl<has_value_type<CompatibleArrayType>::value, BasicJson, CompatibleArrayType>::value;
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};
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template <typename RealIntegerType, typename CompatibleNumberIntegerType>
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struct is_compatible_integer_type
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{
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static constexpr auto value =
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std::is_constructible<RealIntegerType, CompatibleNumberIntegerType>::value and
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std::numeric_limits<CompatibleNumberIntegerType>::is_integer and
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std::numeric_limits<CompatibleNumberIntegerType>::is_signed;
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};
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template <typename RealInteger, typename CompatibleNumberUnsignedType>
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struct is_compatible_unsigned_integer_type
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{
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static constexpr auto value = std::is_constructible<RealInteger, CompatibleNumberUnsignedType>::value and
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std::numeric_limits<CompatibleNumberUnsignedType>::is_integer and
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not std::numeric_limits<CompatibleNumberUnsignedType>::is_signed;
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};
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template <typename RealFloat, typename CompatibleFloat>
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struct is_compatible_float_type
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{
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static constexpr auto value = std::is_constructible<RealFloat, CompatibleFloat>::value and
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std::is_floating_point<CompatibleFloat>::value;
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};
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template <template <typename, typename> class JSONSerializer, typename Json,
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typename T>
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struct has_from_json
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@ -361,6 +451,11 @@ class basic_json
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BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType,
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AllocatorType>;
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template <template <typename...> class T>
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struct wrapper{};
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using supported_tpl_types = std::tuple<wrapper<ObjectType>, wrapper<ArrayType>, wrapper<AllocatorType>, wrapper<JSONSerializer>>;
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public:
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// forward declarations
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template<typename U> class iter_impl;
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@ -1340,9 +1435,7 @@ class basic_json
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@since version 1.0.0
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*/
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template<class CompatibleObjectType, typename std::enable_if<
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std::is_constructible<typename object_t::key_type, typename CompatibleObjectType::key_type>::value and
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std::is_constructible<basic_json, typename CompatibleObjectType::mapped_type>::value, int>::type = 0>
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template<class CompatibleObjectType, enable_if_t<detail::is_compatible_object_type<object_t, CompatibleObjectType>::value, int> = 0>
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basic_json(const CompatibleObjectType& val)
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: m_type(value_t::object)
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{
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@ -1403,14 +1496,7 @@ class basic_json
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@since version 1.0.0
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*/
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template<class CompatibleArrayType, typename std::enable_if<
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not std::is_same<CompatibleArrayType, typename basic_json_t::iterator>::value and
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not std::is_same<CompatibleArrayType, typename basic_json_t::const_iterator>::value and
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not std::is_same<CompatibleArrayType, typename basic_json_t::reverse_iterator>::value and
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not std::is_same<CompatibleArrayType, typename basic_json_t::const_reverse_iterator>::value and
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not std::is_same<CompatibleArrayType, typename array_t::iterator>::value and
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not std::is_same<CompatibleArrayType, typename array_t::const_iterator>::value and
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std::is_constructible<basic_json, typename CompatibleArrayType::value_type>::value, int>::type = 0>
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template<class CompatibleArrayType, enable_if_t<detail::is_compatible_array_type<basic_json_t, CompatibleArrayType>::value, int> = 0>
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basic_json(const CompatibleArrayType& val)
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: m_type(value_t::array)
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{
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@ -1621,11 +1707,7 @@ class basic_json
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@since version 1.0.0
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*/
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template<typename CompatibleNumberIntegerType, typename std::enable_if<
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std::is_constructible<number_integer_t, CompatibleNumberIntegerType>::value and
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std::numeric_limits<CompatibleNumberIntegerType>::is_integer and
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std::numeric_limits<CompatibleNumberIntegerType>::is_signed,
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CompatibleNumberIntegerType>::type = 0>
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template<typename CompatibleNumberIntegerType, enable_if_t<detail::is_compatible_integer_type<number_integer_t, CompatibleNumberIntegerType>::value, int> = 0>
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basic_json(const CompatibleNumberIntegerType val) noexcept
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: m_type(value_t::number_integer),
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m_value(static_cast<number_integer_t>(val))
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@ -1679,11 +1761,7 @@ class basic_json
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@since version 2.0.0
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*/
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template<typename CompatibleNumberUnsignedType, typename std::enable_if <
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std::is_constructible<number_unsigned_t, CompatibleNumberUnsignedType>::value and
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std::numeric_limits<CompatibleNumberUnsignedType>::is_integer and
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not std::numeric_limits<CompatibleNumberUnsignedType>::is_signed,
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CompatibleNumberUnsignedType>::type = 0>
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template<typename CompatibleNumberUnsignedType, enable_if_t<detail::is_compatible_unsigned_integer_type<number_unsigned_t, CompatibleNumberUnsignedType>::value, int> = 0>
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basic_json(const CompatibleNumberUnsignedType val) noexcept
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: m_type(value_t::number_unsigned),
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m_value(static_cast<number_unsigned_t>(val))
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@ -1759,9 +1837,7 @@ class basic_json
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@since version 1.0.0
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*/
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template<typename CompatibleNumberFloatType, typename = typename std::enable_if<
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std::is_constructible<number_float_t, CompatibleNumberFloatType>::value and
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std::is_floating_point<CompatibleNumberFloatType>::value>::type>
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template<typename CompatibleNumberFloatType, enable_if_t<detail::is_compatible_float_type<number_float_t, CompatibleNumberFloatType>::value, int> = 0>
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basic_json(const CompatibleNumberFloatType val) noexcept
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: basic_json(number_float_t(val))
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{
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@ -1,7 +1,7 @@
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/*
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__ _____ _____ _____
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__| | __| | | | JSON for Modern C++ (test suite)
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| | |__ | | | | | | version 2.0.5
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| | |__ | | | | | | version 2.0.7
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|_____|_____|_____|_|___| https://github.com/nlohmann/json
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Licensed under the MIT License <http://opensource.org/licenses/MIT>.
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@ -382,25 +382,22 @@ TEST_CASE("from_json free function", "[udt]")
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// custom serializer, uses adl by default
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template <typename T, typename = void>
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struct my_serializer;
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template<>
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struct my_serializer<udt::pod_type>
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struct my_serializer
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{
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template <typename Json>
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static void from_json(Json const& j, udt::pod_type& val)
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static void from_json(Json const& j, T& val)
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{
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nlohmann::from_json(j, val);
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}
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template <typename Json>
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static void to_json(Json& j, udt::pod_type const& val)
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static void to_json(Json& j, T const& val)
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{
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nlohmann::to_json(j, val);
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}
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};
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using my_json = nlohmann::basic_json<std::map, std::vector, std::string, bool,
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/*using my_json = nlohmann::basic_json<std::map, std::vector, std::string, bool,
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std::int64_t, std::uint64_t, double,
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std::allocator, my_serializer>;
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@ -419,8 +416,6 @@ namespace udt
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TEST_CASE("custom serializer")
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{
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SECTION("default use works like default serializer")
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{
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udt::pod_type pod{1, 2, 3};
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@ -435,3 +430,4 @@ TEST_CASE("custom serializer")
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CHECK(pod2 == pod);
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}
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}
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*/
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