💄 some cleanup
This commit is contained in:
Niels Lohmann
Théo DELRIEU
parent
be1d3de49b
commit
034d5ed97e
2 changed files with 50 additions and 62 deletions
56
src/json.hpp
56
src/json.hpp
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@ -141,7 +141,8 @@ using is_unscoped_enum =
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namespace detail
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{
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// Very useful construct against boilerplate (more boilerplate needed than in C++17: http://en.cppreference.com/w/cpp/types/void_t)
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// very useful construct against boilerplate (more boilerplate needed than in
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// C++17: http://en.cppreference.com/w/cpp/types/void_t)
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template <typename...> struct make_void
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{
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using type = void;
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@ -174,29 +175,29 @@ struct disjunction<B1, Bn...>
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/*!
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@brief Helper to determine whether there's a key_type for T.
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Thus helper is used to tell associative containers apart from other containers
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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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private: \
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template <typename U, typename = typename U::type> \
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static int detect(U &&); \
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\
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static void detect(...); \
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\
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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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#define NLOHMANN_JSON_HAS_HELPER(type) \
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template <typename T> struct has_##type { \
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private: \
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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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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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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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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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#undef NLOHMANN_JSON_HAS_HELPER
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@ -216,8 +217,8 @@ struct is_compatible_object_type_impl<true, RealType, CompatibleObjectType>
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template<class RealType, class CompatibleObjectType>
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struct is_compatible_object_type
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{
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// As noted ahead, we need to stop evaluating traits if CompatibleObjectType = void
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// hence the conjunction
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// As noted ahead, we need to stop evaluating traits if
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// `CompatibleObjectType = void`, hence the conjunction
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static auto constexpr value = is_compatible_object_type_impl <
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conjunction<negation<std::is_same<void, CompatibleObjectType>>,
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has_mapped_type<CompatibleObjectType>,
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@ -249,8 +250,8 @@ struct is_compatible_array_type_impl<true, BasicJson, CompatibleArrayType>
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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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// the check for CompatibleArrayType = void is done in is_compatible_object_type
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// but we need the conjunction here as well
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// the check for CompatibleArrayType = void is done in
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// `is_compatible_object_type`, but we need the conjunction here as well
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static auto constexpr value = is_compatible_array_type_impl <
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conjunction<negation<is_compatible_object_type<
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typename BasicJson::object_t, CompatibleArrayType>>,
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@ -302,8 +303,7 @@ struct is_compatible_basic_json_type
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is_compatible_array_type<BasicJson, T>::value or
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is_compatible_object_type<typename BasicJson::object_t, T>::value or
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is_compatible_float_type<typename BasicJson::number_float_t, T>::value or
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is_compatible_integer_type<typename BasicJson::number_integer_t,
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T>::value or
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is_compatible_integer_type<typename BasicJson::number_integer_t, T>::value or
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is_compatible_integer_type<typename BasicJson::number_unsigned_t,
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T>::value;
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};
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@ -320,8 +320,7 @@ struct is_basic_json_nested_class
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};
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// This trait checks if JSONSerializer<T>::from_json(json const&, udt&) exists
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template <template <typename, typename> class JSONSerializer, typename Json,
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typename T>
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template <template <typename, typename> class JSONSerializer, typename Json, typename T>
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struct has_from_json
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{
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private:
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@ -329,7 +328,6 @@ struct has_from_json
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template <typename U, typename = enable_if_t<std::is_same<void, decltype(uncvref_t<U>::from_json(
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std::declval<Json>(), std::declval<T&>()))>::value>>
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static int detect(U&&);
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static void detect(...);
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public:
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@ -346,7 +344,6 @@ struct has_non_default_from_json
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private:
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template <typename U, typename = enable_if_t<std::is_same<T, decltype(uncvref_t<U>::from_json(std::declval<Json>()))>::value>>
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static int detect(U&&);
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static void detect(...);
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public:
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@ -363,7 +360,6 @@ struct has_to_json
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template <typename U, typename = decltype(uncvref_t<U>::to_json(
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std::declval<Json&>(), std::declval<T>()))>
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static int detect(U&&);
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static void detect(...);
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public:
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@ -1598,8 +1594,7 @@ class basic_json
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@since version 1.0.0
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*/
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template <class CompatibleArrayType,
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enable_if_t<detail::is_compatible_array_type<
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basic_json_t, CompatibleArrayType>::value,
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enable_if_t<detail::is_compatible_array_type<basic_json_t, CompatibleArrayType>::value,
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int> = 0>
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basic_json(const CompatibleArrayType& val) : m_type(value_t::array)
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{
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@ -1620,7 +1615,6 @@ class basic_json
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not detail::is_basic_json_nested_class<uncvref_t<T>, basic_json_t, primitive_iterator_t>::value and
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not std::is_same<uncvref_t<T>, typename basic_json_t::array_t::iterator>::value and
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not std::is_same<uncvref_t<T>, typename basic_json_t::object_t::iterator>::value and
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detail::conjunction<detail::negation<detail::is_compatible_basic_json_type<
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uncvref_t<T>, basic_json_t>>,
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detail::has_to_json<JSONSerializer, basic_json,
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@ -141,7 +141,8 @@ using is_unscoped_enum =
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namespace detail
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{
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// Very useful construct against boilerplate (more boilerplate needed than in C++17: http://en.cppreference.com/w/cpp/types/void_t)
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// very useful construct against boilerplate (more boilerplate needed than in
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// C++17: http://en.cppreference.com/w/cpp/types/void_t)
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template <typename...> struct make_void
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{
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using type = void;
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@ -174,29 +175,29 @@ struct disjunction<B1, Bn...>
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/*!
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@brief Helper to determine whether there's a key_type for T.
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Thus helper is used to tell associative containers apart from other containers
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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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private: \
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template <typename U, typename = typename U::type> \
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static int detect(U &&); \
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\
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static void detect(...); \
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\
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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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#define NLOHMANN_JSON_HAS_HELPER(type) \
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template <typename T> struct has_##type { \
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private: \
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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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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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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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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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#undef NLOHMANN_JSON_HAS_HELPER
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@ -216,8 +217,8 @@ struct is_compatible_object_type_impl<true, RealType, CompatibleObjectType>
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template<class RealType, class CompatibleObjectType>
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struct is_compatible_object_type
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{
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// As noted ahead, we need to stop evaluating traits if CompatibleObjectType = void
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// hence the conjunction
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// As noted ahead, we need to stop evaluating traits if
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// `CompatibleObjectType = void`, hence the conjunction
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static auto constexpr value = is_compatible_object_type_impl <
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conjunction<negation<std::is_same<void, CompatibleObjectType>>,
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has_mapped_type<CompatibleObjectType>,
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@ -249,8 +250,8 @@ struct is_compatible_array_type_impl<true, BasicJson, CompatibleArrayType>
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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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// the check for CompatibleArrayType = void is done in is_compatible_object_type
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// but we need the conjunction here as well
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// the check for CompatibleArrayType = void is done in
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// `is_compatible_object_type`, but we need the conjunction here as well
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static auto constexpr value = is_compatible_array_type_impl <
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conjunction<negation<is_compatible_object_type<
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typename BasicJson::object_t, CompatibleArrayType>>,
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@ -302,8 +303,7 @@ struct is_compatible_basic_json_type
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is_compatible_array_type<BasicJson, T>::value or
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is_compatible_object_type<typename BasicJson::object_t, T>::value or
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is_compatible_float_type<typename BasicJson::number_float_t, T>::value or
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is_compatible_integer_type<typename BasicJson::number_integer_t,
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T>::value or
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is_compatible_integer_type<typename BasicJson::number_integer_t, T>::value or
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is_compatible_integer_type<typename BasicJson::number_unsigned_t,
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T>::value;
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};
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@ -320,8 +320,7 @@ struct is_basic_json_nested_class
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};
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// This trait checks if JSONSerializer<T>::from_json(json const&, udt&) exists
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template <template <typename, typename> class JSONSerializer, typename Json,
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typename T>
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template <template <typename, typename> class JSONSerializer, typename Json, typename T>
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struct has_from_json
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{
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private:
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@ -329,7 +328,6 @@ struct has_from_json
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template <typename U, typename = enable_if_t<std::is_same<void, decltype(uncvref_t<U>::from_json(
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std::declval<Json>(), std::declval<T&>()))>::value>>
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static int detect(U&&);
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static void detect(...);
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public:
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@ -346,7 +344,6 @@ struct has_non_default_from_json
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private:
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template <typename U, typename = enable_if_t<std::is_same<T, decltype(uncvref_t<U>::from_json(std::declval<Json>()))>::value>>
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static int detect(U&&);
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static void detect(...);
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public:
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@ -363,7 +360,6 @@ struct has_to_json
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template <typename U, typename = decltype(uncvref_t<U>::to_json(
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std::declval<Json&>(), std::declval<T>()))>
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static int detect(U&&);
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static void detect(...);
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public:
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@ -1599,8 +1595,7 @@ class basic_json
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@since version 1.0.0
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*/
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template <class CompatibleArrayType,
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enable_if_t<detail::is_compatible_array_type<
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basic_json_t, CompatibleArrayType>::value,
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enable_if_t<detail::is_compatible_array_type<basic_json_t, CompatibleArrayType>::value,
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int> = 0>
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basic_json(const CompatibleArrayType& val) : m_type(value_t::array)
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{
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@ -1621,7 +1616,6 @@ class basic_json
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not detail::is_basic_json_nested_class<uncvref_t<T>, basic_json_t, primitive_iterator_t>::value and
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not std::is_same<uncvref_t<T>, typename basic_json_t::array_t::iterator>::value and
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not std::is_same<uncvref_t<T>, typename basic_json_t::object_t::iterator>::value and
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detail::conjunction<detail::negation<detail::is_compatible_basic_json_type<
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uncvref_t<T>, basic_json_t>>,
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detail::has_to_json<JSONSerializer, basic_json,
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