mirror of
https://github.com/simdjson/simdjson
synced 2026-06-08 17:27:07 +00:00
Daniel Lemire
93 lines
4.3 KiB
C++
93 lines
4.3 KiB
C++
#if SIMDJSON_SUPPORTS_CONCEPTS
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#ifndef SIMDJSON_ONDEMAND_DESERIALIZE_H
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#ifndef SIMDJSON_CONDITIONAL_INCLUDE
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#define SIMDJSON_ONDEMAND_DESERIALIZE_H
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#include "simdjson/generic/ondemand/base.h"
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#include "simdjson/generic/ondemand/array.h"
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#endif // SIMDJSON_CONDITIONAL_INCLUDE
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namespace simdjson {
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struct deserialize_tag;
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/// These types are deserializable in a built-in way
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template <typename> struct is_builtin_deserializable : std::false_type {};
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template <> struct is_builtin_deserializable<int64_t> : std::true_type {};
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template <> struct is_builtin_deserializable<uint64_t> : std::true_type {};
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template <> struct is_builtin_deserializable<double> : std::true_type {};
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template <> struct is_builtin_deserializable<bool> : std::true_type {};
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template <> struct is_builtin_deserializable<SIMDJSON_IMPLEMENTATION::ondemand::array> : std::true_type {};
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template <> struct is_builtin_deserializable<SIMDJSON_IMPLEMENTATION::ondemand::object> : std::true_type {};
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template <> struct is_builtin_deserializable<SIMDJSON_IMPLEMENTATION::ondemand::value> : std::true_type {};
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template <> struct is_builtin_deserializable<SIMDJSON_IMPLEMENTATION::ondemand::raw_json_string> : std::true_type {};
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template <> struct is_builtin_deserializable<std::string_view> : std::true_type {};
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template <typename T>
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concept is_builtin_deserializable_v = is_builtin_deserializable<T>::value;
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template <typename T, typename ValT = SIMDJSON_IMPLEMENTATION::ondemand::value>
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concept custom_deserializable = tag_invocable<deserialize_tag, ValT&, T&>;
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template <typename T, typename ValT = SIMDJSON_IMPLEMENTATION::ondemand::value>
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concept deserializable = custom_deserializable<T, ValT> || is_builtin_deserializable_v<T> || concepts::optional_type<T>;
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template <typename T, typename ValT = SIMDJSON_IMPLEMENTATION::ondemand::value>
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concept nothrow_custom_deserializable = nothrow_tag_invocable<deserialize_tag, ValT&, T&>;
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// built-in types are noexcept and if an error happens, the value simply gets ignored and the error is returned.
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template <typename T, typename ValT = SIMDJSON_IMPLEMENTATION::ondemand::value>
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concept nothrow_deserializable = nothrow_custom_deserializable<T, ValT> || is_builtin_deserializable_v<T>;
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/// Deserialize Tag
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inline constexpr struct deserialize_tag {
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using array_type = SIMDJSON_IMPLEMENTATION::ondemand::array;
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using object_type = SIMDJSON_IMPLEMENTATION::ondemand::object;
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using value_type = SIMDJSON_IMPLEMENTATION::ondemand::value;
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using document_type = SIMDJSON_IMPLEMENTATION::ondemand::document;
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using document_reference_type = SIMDJSON_IMPLEMENTATION::ondemand::document_reference;
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// Customization Point for array
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template <typename T>
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requires custom_deserializable<T, value_type>
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simdjson_warn_unused constexpr /* error_code */ auto operator()(array_type &object, T& output) const noexcept(nothrow_custom_deserializable<T, value_type>) {
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return tag_invoke(*this, object, output);
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}
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// Customization Point for object
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template <typename T>
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requires custom_deserializable<T, value_type>
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simdjson_warn_unused constexpr /* error_code */ auto operator()(object_type &object, T& output) const noexcept(nothrow_custom_deserializable<T, value_type>) {
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return tag_invoke(*this, object, output);
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}
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// Customization Point for value
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template <typename T>
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requires custom_deserializable<T, value_type>
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simdjson_warn_unused constexpr /* error_code */ auto operator()(value_type &object, T& output) const noexcept(nothrow_custom_deserializable<T, value_type>) {
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return tag_invoke(*this, object, output);
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}
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// Customization Point for document
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template <typename T>
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requires custom_deserializable<T, document_type>
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simdjson_warn_unused constexpr /* error_code */ auto operator()(document_type &object, T& output) const noexcept(nothrow_custom_deserializable<T, document_type>) {
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return tag_invoke(*this, object, output);
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}
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// Customization Point for document reference
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template <typename T>
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requires custom_deserializable<T, document_reference_type>
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simdjson_warn_unused constexpr /* error_code */ auto operator()(document_reference_type &object, T& output) const noexcept(nothrow_custom_deserializable<T, document_reference_type>) {
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return tag_invoke(*this, object, output);
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}
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} deserialize{};
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} // namespace simdjson
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#endif // SIMDJSON_ONDEMAND_DESERIALIZE_H
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#endif // SIMDJSON_SUPPORTS_CONCEPTS
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