mirror of
https://github.com/simdjson/simdjson
synced 2026-06-08 17:27:07 +00:00
John Keiser
94 lines
3.6 KiB
C++
94 lines
3.6 KiB
C++
#include "simdjson/error.h"
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namespace simdjson {
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namespace SIMDJSON_IMPLEMENTATION {
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namespace ondemand {
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/**
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* A forward-only JSON object field iterator.
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*/
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class object {
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public:
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/**
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* Create a new invalid object.
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*
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* Exists so you can declare a variable and later assign to it before use.
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*/
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simdjson_really_inline object() noexcept = default;
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simdjson_really_inline object(object &&other) noexcept = default;
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simdjson_really_inline object &operator=(object &&other) noexcept = default;
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object(const object &) = delete;
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object &operator=(const object &) = delete;
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simdjson_really_inline ~object() noexcept;
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simdjson_really_inline object_iterator begin() noexcept;
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simdjson_really_inline object_iterator end() noexcept;
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simdjson_really_inline simdjson_result<value> operator[](const std::string_view key) & noexcept;
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simdjson_really_inline simdjson_result<value> operator[](const std::string_view key) && noexcept;
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protected:
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/**
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* Begin object iteration.
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*
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* @param doc The document containing the object. The iterator must be just after the opening `{`.
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* @param error If this is not SUCCESS, creates an error chained object.
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*/
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static simdjson_really_inline simdjson_result<object> start(json_iterator_ref &&iter) noexcept;
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static simdjson_really_inline object started(json_iterator_ref &&iter) noexcept;
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/**
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* Internal object creation. Call object::begin(doc) instead of this.
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*
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* @param doc The document containing the object. doc->depth must already be incremented to
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* reflect the object's depth. The iterator must be just after the opening `{`.
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*/
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simdjson_really_inline object(json_iterator_ref &&_iter) noexcept;
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simdjson_really_inline error_code find_field(const std::string_view key) noexcept;
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/**
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* Document containing the primary iterator.
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*
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* PERF NOTE: expected to be elided in favor of the parent document: this is set when the object
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* is first used, and never changes afterwards.
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*/
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json_iterator_ref iter{};
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/**
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* Whether we are at the start.
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*
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* PERF NOTE: this should be elided into inline control flow: it is only used for the first []
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* or * call, and SSA optimizers commonly do first-iteration loop optimization.
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*/
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bool at_start{};
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friend class value;
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friend class document;
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friend struct simdjson_result<object>;
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};
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} // namespace ondemand
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} // namespace SIMDJSON_IMPLEMENTATION
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} // namespace simdjson
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namespace simdjson {
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template<>
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struct simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object> : public SIMDJSON_IMPLEMENTATION::implementation_simdjson_result_base<SIMDJSON_IMPLEMENTATION::ondemand::object> {
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public:
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simdjson_really_inline simdjson_result(SIMDJSON_IMPLEMENTATION::ondemand::object &&value) noexcept; ///< @private
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simdjson_really_inline simdjson_result(error_code error) noexcept; ///< @private
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simdjson_really_inline simdjson_result() noexcept = default;
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simdjson_really_inline simdjson_result(simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object> &&a) noexcept = default;
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simdjson_really_inline ~simdjson_result() noexcept = default; ///< @private
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simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator> begin() noexcept;
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simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::object_iterator> end() noexcept;
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simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> operator[](std::string_view key) & noexcept;
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simdjson_really_inline simdjson_result<SIMDJSON_IMPLEMENTATION::ondemand::value> operator[](std::string_view key) && noexcept;
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};
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} // namespace simdjson
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