Enhance CMake configuration and add nlohmann/json library files. Updated CMakeLists.txt to include the nlohmann JSON library directory. Added multiple header files for JSON serialization, deserialization, and utility functions, ensuring compatibility with the latest version 3.11.2. This update improves JSON handling capabilities in the project.
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include/nlohmann/detail/iterators/iteration_proxy.hpp
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include/nlohmann/detail/iterators/iteration_proxy.hpp
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// __ _____ _____ _____
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// __| | __| | | | JSON for Modern C++
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// | | |__ | | | | | | version 3.11.2
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// |_____|_____|_____|_|___| https://github.com/nlohmann/json
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//
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// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
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// SPDX-License-Identifier: MIT
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#pragma once
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#include <cstddef> // size_t
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#include <iterator> // input_iterator_tag
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#include <string> // string, to_string
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#include <tuple> // tuple_size, get, tuple_element
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#include <utility> // move
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#if JSON_HAS_RANGES
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#include <ranges> // enable_borrowed_range
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#endif
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#include <nlohmann/detail/abi_macros.hpp>
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#include <nlohmann/detail/meta/type_traits.hpp>
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#include <nlohmann/detail/value_t.hpp>
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NLOHMANN_JSON_NAMESPACE_BEGIN
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namespace detail
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{
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template<typename string_type>
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void int_to_string( string_type& target, std::size_t value )
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{
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// For ADL
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using std::to_string;
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target = to_string(value);
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}
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template<typename IteratorType> class iteration_proxy_value
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{
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public:
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using difference_type = std::ptrdiff_t;
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using value_type = iteration_proxy_value;
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using pointer = value_type *;
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using reference = value_type &;
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using iterator_category = std::input_iterator_tag;
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using string_type = typename std::remove_cv< typename std::remove_reference<decltype( std::declval<IteratorType>().key() ) >::type >::type;
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private:
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/// the iterator
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IteratorType anchor{};
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/// an index for arrays (used to create key names)
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std::size_t array_index = 0;
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/// last stringified array index
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mutable std::size_t array_index_last = 0;
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/// a string representation of the array index
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mutable string_type array_index_str = "0";
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/// an empty string (to return a reference for primitive values)
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string_type empty_str{};
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public:
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explicit iteration_proxy_value() = default;
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explicit iteration_proxy_value(IteratorType it, std::size_t array_index_ = 0)
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noexcept(std::is_nothrow_move_constructible<IteratorType>::value
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&& std::is_nothrow_default_constructible<string_type>::value)
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: anchor(std::move(it))
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, array_index(array_index_)
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{}
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iteration_proxy_value(iteration_proxy_value const&) = default;
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iteration_proxy_value& operator=(iteration_proxy_value const&) = default;
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// older GCCs are a bit fussy and require explicit noexcept specifiers on defaulted functions
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iteration_proxy_value(iteration_proxy_value&&)
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noexcept(std::is_nothrow_move_constructible<IteratorType>::value
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&& std::is_nothrow_move_constructible<string_type>::value) = default; // NOLINT(hicpp-noexcept-move,performance-noexcept-move-constructor)
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iteration_proxy_value& operator=(iteration_proxy_value&&)
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noexcept(std::is_nothrow_move_assignable<IteratorType>::value
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&& std::is_nothrow_move_assignable<string_type>::value) = default; // NOLINT(hicpp-noexcept-move,performance-noexcept-move-constructor)
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~iteration_proxy_value() = default;
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/// dereference operator (needed for range-based for)
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const iteration_proxy_value& operator*() const
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{
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return *this;
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}
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/// increment operator (needed for range-based for)
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iteration_proxy_value& operator++()
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{
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++anchor;
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++array_index;
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return *this;
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}
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iteration_proxy_value operator++(int)& // NOLINT(cert-dcl21-cpp)
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{
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auto tmp = iteration_proxy_value(anchor, array_index);
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++anchor;
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++array_index;
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return tmp;
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}
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/// equality operator (needed for InputIterator)
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bool operator==(const iteration_proxy_value& o) const
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{
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return anchor == o.anchor;
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}
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/// inequality operator (needed for range-based for)
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bool operator!=(const iteration_proxy_value& o) const
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{
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return anchor != o.anchor;
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}
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/// return key of the iterator
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const string_type& key() const
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{
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JSON_ASSERT(anchor.m_object != nullptr);
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switch (anchor.m_object->type())
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{
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// use integer array index as key
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case value_t::array:
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{
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if (array_index != array_index_last)
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{
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int_to_string( array_index_str, array_index );
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array_index_last = array_index;
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}
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return array_index_str;
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}
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// use key from the object
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case value_t::object:
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return anchor.key();
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// use an empty key for all primitive types
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case value_t::null:
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case value_t::string:
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case value_t::boolean:
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case value_t::number_integer:
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case value_t::number_unsigned:
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case value_t::number_float:
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case value_t::binary:
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case value_t::discarded:
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default:
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return empty_str;
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}
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}
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/// return value of the iterator
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typename IteratorType::reference value() const
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{
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return anchor.value();
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}
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};
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/// proxy class for the items() function
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template<typename IteratorType> class iteration_proxy
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{
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private:
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/// the container to iterate
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typename IteratorType::pointer container = nullptr;
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public:
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explicit iteration_proxy() = default;
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/// construct iteration proxy from a container
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explicit iteration_proxy(typename IteratorType::reference cont) noexcept
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: container(&cont) {}
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iteration_proxy(iteration_proxy const&) = default;
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iteration_proxy& operator=(iteration_proxy const&) = default;
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iteration_proxy(iteration_proxy&&) noexcept = default;
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iteration_proxy& operator=(iteration_proxy&&) noexcept = default;
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~iteration_proxy() = default;
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/// return iterator begin (needed for range-based for)
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iteration_proxy_value<IteratorType> begin() const noexcept
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{
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return iteration_proxy_value<IteratorType>(container->begin());
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}
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/// return iterator end (needed for range-based for)
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iteration_proxy_value<IteratorType> end() const noexcept
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{
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return iteration_proxy_value<IteratorType>(container->end());
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}
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};
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// Structured Bindings Support
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// For further reference see https://blog.tartanllama.xyz/structured-bindings/
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// And see https://github.com/nlohmann/json/pull/1391
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template<std::size_t N, typename IteratorType, enable_if_t<N == 0, int> = 0>
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auto get(const nlohmann::detail::iteration_proxy_value<IteratorType>& i) -> decltype(i.key())
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{
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return i.key();
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}
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// Structured Bindings Support
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// For further reference see https://blog.tartanllama.xyz/structured-bindings/
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// And see https://github.com/nlohmann/json/pull/1391
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template<std::size_t N, typename IteratorType, enable_if_t<N == 1, int> = 0>
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auto get(const nlohmann::detail::iteration_proxy_value<IteratorType>& i) -> decltype(i.value())
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{
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return i.value();
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}
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} // namespace detail
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NLOHMANN_JSON_NAMESPACE_END
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// The Addition to the STD Namespace is required to add
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// Structured Bindings Support to the iteration_proxy_value class
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// For further reference see https://blog.tartanllama.xyz/structured-bindings/
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// And see https://github.com/nlohmann/json/pull/1391
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namespace std
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{
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#if defined(__clang__)
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// Fix: https://github.com/nlohmann/json/issues/1401
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wmismatched-tags"
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#endif
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template<typename IteratorType>
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class tuple_size<::nlohmann::detail::iteration_proxy_value<IteratorType>> // NOLINT(cert-dcl58-cpp)
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: public std::integral_constant<std::size_t, 2> {};
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template<std::size_t N, typename IteratorType>
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class tuple_element<N, ::nlohmann::detail::iteration_proxy_value<IteratorType >> // NOLINT(cert-dcl58-cpp)
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{
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public:
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using type = decltype(
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get<N>(std::declval <
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::nlohmann::detail::iteration_proxy_value<IteratorType >> ()));
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};
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#if defined(__clang__)
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#pragma clang diagnostic pop
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#endif
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} // namespace std
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#if JSON_HAS_RANGES
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template <typename IteratorType>
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inline constexpr bool ::std::ranges::enable_borrowed_range<::nlohmann::detail::iteration_proxy<IteratorType>> = true;
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#endif
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