// __ _____ _____ _____
// __| | __| | | | JSON for Modern C++ (supporting code)
// | | |__ | | | | | | version 3.11.3
// |_____|_____|_____|_|___| https://github.com/nlohmann/json
//
// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
// SPDX-License-Identifier: MIT

// cmake/test.cmake selects the C++ standard versions with which to build a
// unit test based on the presence of JSON_HAS_CPP_<VERSION> macros.
// When using macros that are only defined for particular versions of the standard
// (e.g., JSON_HAS_FILESYSTEM for C++17 and up), please mention the corresponding
// version macro in a comment close by, like this:
// JSON_HAS_CPP_<VERSION> (do not remove; see note at top of file)

#include "doctest_compatibility.h"

// for some reason including this after the json header leads to linker errors with VS 2017...
#include <locale>

#define JSON_TESTS_PRIVATE
#include <nlohmann/json.hpp>
using json = nlohmann::json;
using ordered_json = nlohmann::ordered_json;
#ifdef JSON_TEST_NO_GLOBAL_UDLS
 using namespace nlohmann::literals; // NOLINT(google-build-using-namespace)
#endif

#include <cstdio>
#include <list>
#include <type_traits>
#include <utility>

#ifdef JSON_HAS_CPP_17
 #include <any>
 #include <variant>
#endif

#ifdef JSON_HAS_CPP_20
 #if __has_include(<span>)
 #include <span>
 #endif
#endif

// NLOHMANN_JSON_SERIALIZE_ENUM uses a static std::pair
DOCTEST_CLANG_SUPPRESS_WARNING_PUSH
DOCTEST_CLANG_SUPPRESS_WARNING("-Wexit-time-destructors")

/////////////////////////////////////////////////////////////////////
// for #1021
/////////////////////////////////////////////////////////////////////

using float_json = nlohmann::basic_json<std::map, std::vector, std::string, bool, std::int64_t, std::uint64_t, float>;

/////////////////////////////////////////////////////////////////////
// for #1647
/////////////////////////////////////////////////////////////////////
namespace
{
struct NonDefaultFromJsonStruct
{};

inline bool operator==(NonDefaultFromJsonStruct const& /*unused*/, NonDefaultFromJsonStruct const& /*unused*/)
{
 return true;
}

enum class for_1647
{
 one,
 two
};

// NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays): this is a false positive
NLOHMANN_JSON_SERIALIZE_ENUM(for_1647,
{
 {for_1647::one, "one"},
 {for_1647::two, "two"},
})
} // namespace

/////////////////////////////////////////////////////////////////////
// for #1299
/////////////////////////////////////////////////////////////////////

struct Data
{
 Data() = default;
 Data(std::string a_, std::string b_)
 : a(std::move(a_))
 , b(std::move(b_))
 {}
 std::string a{}; // NOLINT(readability-redundant-member-init)
 std::string b{}; // NOLINT(readability-redundant-member-init)
};

void from_json(const json& j, Data& data); // NOLINT(misc-use-internal-linkage)
void from_json(const json& j, Data& data)
{
 j["a"].get_to(data.a);
 j["b"].get_to(data.b);
}

bool operator==(Data const& lhs, Data const& rhs); // NOLINT(misc-use-internal-linkage)
bool operator==(Data const& lhs, Data const& rhs)
{
 return lhs.a == rhs.a && lhs.b == rhs.b;
}

//bool operator!=(Data const& lhs, Data const& rhs)
//{
// return !(lhs == rhs);
//}

namespace nlohmann
{
template<>
struct adl_serializer<NonDefaultFromJsonStruct>
{
 static NonDefaultFromJsonStruct from_json(json const& /*unused*/) noexcept
 {
 return {};
 }
};
} // namespace nlohmann

/////////////////////////////////////////////////////////////////////
// for #1805
/////////////////////////////////////////////////////////////////////

struct NotSerializableData
{
 int mydata;
 float myfloat;
};

/////////////////////////////////////////////////////////////////////
// for #2574
/////////////////////////////////////////////////////////////////////

struct NonDefaultConstructible
{
 explicit NonDefaultConstructible(int a)
 : x(a)
 {}
 int x;
};

namespace nlohmann
{
template<>
struct adl_serializer<NonDefaultConstructible>
{
 static NonDefaultConstructible from_json(json const& j)
 {
 return NonDefaultConstructible(j.get<int>());
 }
};
} // namespace nlohmann

/////////////////////////////////////////////////////////////////////
// for #2824
/////////////////////////////////////////////////////////////////////

class sax_no_exception : public nlohmann::detail::json_sax_dom_parser<json, nlohmann::detail::string_input_adapter_type>
{
 public:
 explicit sax_no_exception(json& j)
 : nlohmann::detail::json_sax_dom_parser<json, nlohmann::detail::string_input_adapter_type>(j, false)
 {}

 static bool parse_error(std::size_t /*position*/, const std::string& /*last_token*/, const json::exception& ex)
 {
 error_string = new std::string(ex.what()); // NOLINT(cppcoreguidelines-owning-memory)
 return false;
 }

 static std::string* error_string;
};

std::string* sax_no_exception::error_string = nullptr;

/////////////////////////////////////////////////////////////////////
// for #2982
/////////////////////////////////////////////////////////////////////

template<class T>
class my_allocator : public std::allocator<T>
{
 public:
 using std::allocator<T>::allocator;

 my_allocator() = default;
 template<class U> my_allocator(const my_allocator<U>& /*unused*/) { }

 template <class U>
 struct rebind
 {
 using other = my_allocator<U>;
 };
};

/////////////////////////////////////////////////////////////////////
// for #3077
/////////////////////////////////////////////////////////////////////

class FooAlloc
{};

class Foo
{
 public:
 explicit Foo(const FooAlloc& /* unused */ = FooAlloc()) {}

 bool value = false;
};

class FooBar
{
 public:
 Foo foo{}; // NOLINT(readability-redundant-member-init)
};

inline void from_json(const nlohmann::json& j, FooBar& fb) // NOLINT(misc-use-internal-linkage)
{
 j.at("value").get_to(fb.foo.value);
}

/////////////////////////////////////////////////////////////////////
// for #3171
/////////////////////////////////////////////////////////////////////

struct for_3171_base // NOLINT(cppcoreguidelines-special-member-functions)
{
 for_3171_base(const std::string& /*unused*/ = {}) {}
 virtual ~for_3171_base();

 for_3171_base(const for_3171_base& other) // NOLINT(hicpp-use-equals-default,modernize-use-equals-default)
 : str(other.str)
 {}

 for_3171_base& operator=(const for_3171_base& other)
 {
 if (this != &other)
 {
 str = other.str;
 }
 return *this;
 }

 for_3171_base(for_3171_base&& other) noexcept
 : str(std::move(other.str))
 {}

 for_3171_base& operator=(for_3171_base&& other) noexcept
 {
 if (this != &other)
 {
 str = std::move(other.str);
 }
 return *this;
 }

 virtual void _from_json(const json& j)
 {
 j.at("str").get_to(str);
 }

 std::string str{}; // NOLINT(readability-redundant-member-init)
};

for_3171_base::~for_3171_base() = default;

struct for_3171_derived : public for_3171_base
{
 for_3171_derived() = default;
 ~for_3171_derived() override;
 explicit for_3171_derived(const std::string& /*unused*/) { }

 for_3171_derived(const for_3171_derived& other) // NOLINT(hicpp-use-equals-default,modernize-use-equals-default)
 : for_3171_base(other)
 {}

 for_3171_derived& operator=(const for_3171_derived& other)
 {
 if (this != &other)
 {
 for_3171_base::operator=(other); // Call base class assignment operator
 }
 return *this;
 }

 for_3171_derived(for_3171_derived&& other) noexcept
 : for_3171_base(std::move(other))
 {}

 for_3171_derived& operator=(for_3171_derived&& other) noexcept
 {
 if (this != &other)
 {
 for_3171_base::operator=(std::move(other)); // Call base class move assignment operator
 }
 return *this;
 }
};

for_3171_derived::~for_3171_derived() = default;

inline void from_json(const json& j, for_3171_base& tb) // NOLINT(misc-use-internal-linkage)
{
 tb._from_json(j);
}

/////////////////////////////////////////////////////////////////////
// for #3312
/////////////////////////////////////////////////////////////////////

#ifdef JSON_HAS_CPP_20
struct for_3312
{
 std::string name;
};

inline void from_json(const json& j, for_3312& obj) // NOLINT(misc-use-internal-linkage)
{
 j.at("name").get_to(obj.name);
}
#endif

/////////////////////////////////////////////////////////////////////
// for #3204
/////////////////////////////////////////////////////////////////////

struct for_3204_foo
{
 for_3204_foo() = default;
 explicit for_3204_foo(std::string /*unused*/) {} // NOLINT(performance-unnecessary-value-param)
};

struct for_3204_bar
{
 enum constructed_from_t
 {
 constructed_from_none = 0,
 constructed_from_foo = 1,
 constructed_from_json = 2
 };

 explicit for_3204_bar(std::function<void(for_3204_foo)> /*unused*/) noexcept // NOLINT(performance-unnecessary-value-param)
 : constructed_from(constructed_from_foo) {}
 explicit for_3204_bar(std::function<void(json)> /*unused*/) noexcept // NOLINT(performance-unnecessary-value-param)
 : constructed_from(constructed_from_json) {}

 constructed_from_t constructed_from = constructed_from_none;
};

/////////////////////////////////////////////////////////////////////
// for #3333
/////////////////////////////////////////////////////////////////////

struct for_3333 final
{
 for_3333(int x_ = 0, int y_ = 0) : x(x_), y(y_) {}

 template <class T>
 for_3333(const T& /*unused*/)
 {
 CHECK(false);
 }

 int x = 0;
 int y = 0;
};

template <>
inline for_3333::for_3333(const json& j)
 : for_3333(j.value("x", 0), j.value("y", 0))
{}

TEST_CASE("regression tests 2")
{
 SECTION("issue #1001 - Fix memory leak during parser callback")
 {
 const auto* geojsonExample = R"(
 { "type": "FeatureCollection",
 "features": [
 { "type": "Feature",
 "geometry": {"type": "Point", "coordinates": [102.0, 0.5]},
 "properties": {"prop0": "value0"}
 },
 { "type": "Feature",
 "geometry": {
 "type": "LineString",
 "coordinates": [
 [102.0, 0.0], [103.0, 1.0], [104.0, 0.0], [105.0, 1.0]
 ]
 },
 "properties": {
 "prop0": "value0",
 "prop1": 0.0
 }
 },
 { "type": "Feature",
 "geometry": {
 "type": "Polygon",
 "coordinates": [
 [ [100.0, 0.0], [101.0, 0.0], [101.0, 1.0],
 [100.0, 1.0], [100.0, 0.0] ]
 ]
 },
 "properties": {
 "prop0": "value0",
 "prop1": {"this": "that"}
 }
 }
 ]
 })";

 const json::parser_callback_t cb = [&](int /*level*/, json::parse_event_t event, json & parsed) noexcept
 {
 // skip uninteresting events
 if (event == json::parse_event_t::value && !parsed.is_primitive())
 {
 return false;
 }

 switch (event)
 {
 case json::parse_event_t::key:
 {
 return true;
 }
 case json::parse_event_t::value:
 {
 return false;
 }
 case json::parse_event_t::object_start:
 {
 return true;
 }
 case json::parse_event_t::object_end:
 {
 return false;
 }
 case json::parse_event_t::array_start:
 {
 return true;
 }
 case json::parse_event_t::array_end:
 {
 return false;
 }

 default:
 {
 return true;
 }
 }
 };

 auto j = json::parse(geojsonExample, cb, true);
 CHECK(j == json());
 }

 SECTION("issue #1021 - to/from_msgpack only works with standard typization")
 {
 float_json j = 1000.0;
 CHECK(float_json::from_cbor(float_json::to_cbor(j)) == j);
 CHECK(float_json::from_msgpack(float_json::to_msgpack(j)) == j);
 CHECK(float_json::from_ubjson(float_json::to_ubjson(j)) == j);

 float_json j2 = {1000.0, 2000.0, 3000.0};
 CHECK(float_json::from_ubjson(float_json::to_ubjson(j2, true, true)) == j2);
 }

 SECTION("issue #1045 - Using STL algorithms with JSON containers with expected results?")
 {
 json diffs = nlohmann::json::array();
 json m1{{"key1", 42}};
 json m2{{"key2", 42}};
 auto p1 = m1.items();
 auto p2 = m2.items();

 using it_type = decltype(p1.begin());

 std::set_difference(
 p1.begin(),
 p1.end(),
 p2.begin(),
 p2.end(),
 std::inserter(diffs, diffs.end()),
 [&](const it_type & e1, const it_type & e2) -> bool
 {
 using comper_pair = std::pair<std::string, decltype(e1.value())>; // Trying to avoid unneeded copy
 return comper_pair(e1.key(), e1.value()) < comper_pair(e2.key(), e2.value()); // Using pair comper
 });

 CHECK(diffs.size() == 1); // Note the change here, was 2
 }

#ifdef JSON_HAS_CPP_17
 SECTION("issue #1292 - Serializing std::variant causes stack overflow")
 {
 static_assert(!std::is_constructible<json, std::variant<int, float>>::value, "unexpected value");
 }
#endif

 SECTION("issue #1299 - compile error in from_json converting to container "
 "with std::pair")
 {
 const json j =
 {
 {"1", {{"a", "testa_1"}, {"b", "testb_1"}}},
 {"2", {{"a", "testa_2"}, {"b", "testb_2"}}},
 {"3", {{"a", "testa_3"}, {"b", "testb_3"}}},
 };

 std::map<std::string, Data> expected
 {
 {"1", {"testa_1", "testb_1"}},
 {"2", {"testa_2", "testb_2"}},
 {"3", {"testa_3", "testb_3"}},
 };
 const auto data = j.get<decltype(expected)>();
 CHECK(expected == data);
 }

 SECTION("issue #1445 - buffer overflow in dumping invalid utf-8 strings")
 {
 SECTION("a bunch of -1, ensure_ascii=true")
 {
 const auto length = 300;

 json dump_test;
 dump_test["1"] = std::string(length, -1);

 std::string expected = R"({"1":")";
 for (int i = 0; i < length; ++i)
 {
 expected += "\\ufffd";
 }
 expected += "\"}";

 auto s = dump_test.dump(-1, ' ', true, nlohmann::json::error_handler_t::replace);
 CHECK(s == expected);
 }
 SECTION("a bunch of -2, ensure_ascii=false")
 {
 const auto length = 500;

 json dump_test;
 dump_test["1"] = std::string(length, -2);

 std::string expected = R"({"1":")";
 for (int i = 0; i < length; ++i)
 {
 expected += "\xEF\xBF\xBD";
 }
 expected += "\"}";

 auto s = dump_test.dump(-1, ' ', false, nlohmann::json::error_handler_t::replace);
 CHECK(s == expected);
 }
 SECTION("test case in issue #1445")
 {
 nlohmann::json dump_test;
 const std::array<int, 108> data =
 {
 {109, 108, 103, 125, -122, -53, 115, 18, 3, 0, 102, 19, 1, 15, -110, 13, -3, -1, -81, 32, 2, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -80, 2, 0, 0, 96, -118, 46, -116, 46, 109, -84, -87, 108, 14, 109, -24, -83, 13, -18, -51, -83, -52, -115, 14, 6, 32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 64, 3, 0, 0, 0, 35, -74, -73, 55, 57, -128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 33, 0, 0, 0, -96, -54, -28, -26}
 };
 std::string s;
 for (const int i : data)
 {
 s += static_cast<char>(i);
 }
 dump_test["1"] = s;
 dump_test.dump(-1, ' ', true, nlohmann::json::error_handler_t::replace);
 }
 }

 SECTION("issue #1447 - Integer Overflow (OSS-Fuzz 12506)")
 {
 const json j = json::parse("[-9223372036854775808]");
 CHECK(j.dump() == "[-9223372036854775808]");
 }

 SECTION("issue #1708 - minimum value of int64_t can be outputted")
 {
 constexpr auto smallest = (std::numeric_limits<int64_t>::min)();
 const json j = smallest;
 CHECK(j.dump() == std::to_string(smallest));
 }

 SECTION("issue #1727 - Contains with non-const lvalue json_pointer picks the wrong overload")
 {
 const json j = {{"root", {{"settings", {{"logging", true}}}}}};

 auto jptr1 = "/root/settings/logging"_json_pointer;
 auto jptr2 = json::json_pointer{"/root/settings/logging"};

 CHECK(j.contains(jptr1));
 CHECK(j.contains(jptr2));
 }

 SECTION("issue #1647 - compile error when deserializing enum if both non-default from_json and non-member operator== exists for other type")
 {
 // does not compile on ICPC when targeting C++20
#if !(defined(__INTEL_COMPILER) && __cplusplus >= 202000)
 {
 const json j;
 NonDefaultFromJsonStruct x(j);
 NonDefaultFromJsonStruct y;
 CHECK(x == y);
 }
#endif

 auto val = nlohmann::json("one").get<for_1647>();
 CHECK(val == for_1647::one);
 const json j = val;
 }

 SECTION("issue #1715 - json::from_cbor does not respect allow_exceptions = false when input is string literal")
 {
 SECTION("string literal")
 {
 const json cbor = json::from_cbor("B", true, false);
 CHECK(cbor.is_discarded());
 }

 SECTION("string array")
 {
 const std::array<char, 2> input = {{'B', 0x00}};
 const json cbor = json::from_cbor(input, true, false);
 CHECK(cbor.is_discarded());
 }

 SECTION("std::string")
 {
 const json cbor = json::from_cbor(std::string("B"), true, false);
 CHECK(cbor.is_discarded());
 }
 }

 SECTION("issue #1805 - A pair<T1, T2> is json constructible only if T1 and T2 are json constructible")
 {
 static_assert(!std::is_constructible<json, std::pair<std::string, NotSerializableData>>::value, "unexpected result");
 static_assert(!std::is_constructible<json, std::pair<NotSerializableData, std::string>>::value, "unexpected result");
 static_assert(std::is_constructible<json, std::pair<int, std::string>>::value, "unexpected result");
 }
 SECTION("issue #1825 - A tuple<Args..> is json constructible only if all T in Args are json constructible")
 {
 static_assert(!std::is_constructible<json, std::tuple<std::string, NotSerializableData>>::value, "unexpected result");
 static_assert(!std::is_constructible<json, std::tuple<NotSerializableData, std::string>>::value, "unexpected result");
 static_assert(std::is_constructible<json, std::tuple<int, std::string>>::value, "unexpected result");
 }

 SECTION("issue #1983 - JSON patch diff for op=add formation is not as per standard (RFC 6902)")
 {
 const auto source = R"({ "foo": [ "1", "2" ] })"_json;
 const auto target = R"({"foo": [ "1", "2", "3" ]})"_json;
 const auto result = json::diff(source, target);
 CHECK(result.dump() == R"([{"op":"add","path":"/foo/-","value":"3"}])");
 }

 SECTION("issue #2067 - cannot serialize binary data to text JSON")
 {
 const std::array<unsigned char, 23> data = {{0x81, 0xA4, 0x64, 0x61, 0x74, 0x61, 0xC4, 0x0F, 0x33, 0x30, 0x30, 0x32, 0x33, 0x34, 0x30, 0x31, 0x30, 0x37, 0x30, 0x35, 0x30, 0x31, 0x30}};
 const json j = json::from_msgpack(data.data(), data.size());
 CHECK_NOTHROW(
 j.dump(4, // Indent
 ' ', // Indent char
 false, // Ensure ascii
 json::error_handler_t::strict // Error
 ));
 }

 SECTION("PR #2181 - regression bug with lvalue")
 {
 // see https://github.com/nlohmann/json/pull/2181#issuecomment-653326060
 const json j{{"x", "test"}};
 const std::string defval = "default value";
 auto val = j.value("x", defval); // NOLINT(bugprone-unused-local-non-trivial-variable)
 auto val2 = j.value("y", defval); // NOLINT(bugprone-unused-local-non-trivial-variable)
 }

 SECTION("issue #2293 - eof doesn't cause parsing to stop")
 {
 const std::vector<uint8_t> data =
 {
 0x7B,
 0x6F,
 0x62,
 0x6A,
 0x65,
 0x63,
 0x74,
 0x20,
 0x4F,
 0x42
 };
 const json result = json::from_cbor(data, true, false);
 CHECK(result.is_discarded());
 }

 SECTION("issue #2315 - json.update and vector<pair>does not work with ordered_json")
 {
 nlohmann::ordered_json jsonAnimals = {{"animal", "dog"}};
 const nlohmann::ordered_json jsonCat = {{"animal", "cat"}};
 jsonAnimals.update(jsonCat);
 CHECK(jsonAnimals["animal"] == "cat");

 auto jsonAnimals_parsed = nlohmann::ordered_json::parse(jsonAnimals.dump());
 CHECK(jsonAnimals == jsonAnimals_parsed);

 const std::vector<std::pair<std::string, int64_t>> intData = {std::make_pair("aaaa", 11),
 std::make_pair("bbb", 222)
 };
 nlohmann::ordered_json jsonObj;
 for (const auto& data : intData)
 {
 jsonObj[data.first] = data.second;
 }
 CHECK(jsonObj["aaaa"] == 11);
 CHECK(jsonObj["bbb"] == 222);
 }

 SECTION("issue #2330 - ignore_comment=true fails on multiple consecutive lines starting with comments")
 {
 const std::string ss = "//\n//\n{\n}\n";
 const json j = json::parse(ss, nullptr, true, true);
 CHECK(j.dump() == "{}");
 }

#ifdef JSON_HAS_CPP_20
#ifndef _LIBCPP_VERSION // see https://github.com/nlohmann/json/issues/4490
#if __has_include(<span>)
 SECTION("issue #2546 - parsing containers of std::byte")
 {
 const char DATA[] = R"("Hello, world!")"; // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
 const auto s = std::as_bytes(std::span(DATA));
 const json j = json::parse(s);
 CHECK(j.dump() == "\"Hello, world!\"");
 }
#endif
#endif
#endif

 SECTION("issue #2574 - Deserialization to std::array, std::pair, and std::tuple with non-default constructable types fails")
 {
 SECTION("std::array")
 {
 {
 const json j = {7, 4};
 auto arr = j.get<std::array<NonDefaultConstructible, 2>>();
 CHECK(arr[0].x == 7);
 CHECK(arr[1].x == 4);
 }

 {
 const json j = 7;
 CHECK_THROWS_AS((j.get<std::array<NonDefaultConstructible, 1>>()), json::type_error);
 }
 }

 SECTION("std::pair")
 {
 {
 const json j = {3, 8};
 auto p = j.get<std::pair<NonDefaultConstructible, NonDefaultConstructible>>();
 CHECK(p.first.x == 3);
 CHECK(p.second.x == 8);
 }

 {
 const json j = {4, 1};
 auto p = j.get<std::pair<int, NonDefaultConstructible>>();
 CHECK(p.first == 4);
 CHECK(p.second.x == 1);
 }

 {
 const json j = {6, 7};
 auto p = j.get<std::pair<NonDefaultConstructible, int>>();
 CHECK(p.first.x == 6);
 CHECK(p.second == 7);
 }

 {
 const json j = 7;
 CHECK_THROWS_AS((j.get<std::pair<NonDefaultConstructible, int>>()), json::type_error);
 }
 }

 SECTION("std::tuple")
 {
 {
 const json j = {9};
 auto t = j.get<std::tuple<NonDefaultConstructible>>();
 CHECK(std::get<0>(t).x == 9);
 }

 {
 const json j = {9, 8, 7};
 auto t = j.get<std::tuple<NonDefaultConstructible, int, NonDefaultConstructible>>();
 CHECK(std::get<0>(t).x == 9);
 CHECK(std::get<1>(t) == 8);
 CHECK(std::get<2>(t).x == 7);
 }

 {
 const json j = 7;
 CHECK_THROWS_AS((j.get<std::tuple<NonDefaultConstructible>>()), json::type_error);
 }
 }
 }

 SECTION("issue #4530 - Serialization of empty tuple")
 {
 const auto source_tuple = std::tuple<>();
 const nlohmann::json j = source_tuple;

 CHECK(j.get<decltype(source_tuple)>() == source_tuple);
 CHECK("[]" == j.dump());
 }

 SECTION("issue #2865 - ASAN detects memory leaks")
 {
 // the code below is expected to not leak memory
 {
 nlohmann::json o;
 const std::string s = "bar";

 nlohmann::to_json(o["foo"], s);

 nlohmann::json p = o;

 // call to_json with a non-null JSON value
 nlohmann::to_json(p["foo"], s);
 }

 {
 nlohmann::json o;
 const std::string s = "bar";

 nlohmann::to_json(o["foo"], s);

 // call to_json with a non-null JSON value
 nlohmann::to_json(o["foo"], s);
 }
 }

 SECTION("issue #2824 - encoding of json::exception::what()")
 {
 json j;
 sax_no_exception sax(j);

 CHECK(!json::sax_parse("xyz", &sax));
 CHECK(*sax_no_exception::error_string == "[json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - invalid literal; last read: 'x'");
 delete sax_no_exception::error_string; // NOLINT(cppcoreguidelines-owning-memory)
 }

 SECTION("issue #2825 - Properly constrain the basic_json conversion operator")
 {
 static_assert(std::is_copy_assignable<nlohmann::ordered_json>::value, "ordered_json must be copy assignable");
 }

 SECTION("issue #2958 - Inserting in unordered json using a pointer retains the leading slash")
 {
 const std::string p = "/root";

 json test1;
 test1[json::json_pointer(p)] = json::object();
 CHECK(test1.dump() == "{\"root\":{}}");

 ordered_json test2;
 test2[ordered_json::json_pointer(p)] = json::object();
 CHECK(test2.dump() == "{\"root\":{}}");

 // json::json_pointer and ordered_json::json_pointer are the same type; behave as above
 ordered_json test3;
 test3[json::json_pointer(p)] = json::object();
 CHECK(std::is_same<json::json_pointer::string_t, ordered_json::json_pointer::string_t>::value);
 CHECK(test3.dump() == "{\"root\":{}}");
 }

 SECTION("issue #2982 - to_{binary format} does not provide a mechanism for specifying a custom allocator for the returned type")
 {
 std::vector<std::uint8_t, my_allocator<std::uint8_t>> my_vector;
 json j = {1, 2, 3, 4};
 json::to_cbor(j, my_vector);
 json k = json::from_cbor(my_vector);
 CHECK(j == k);
 }

#if JSON_HAS_FILESYSTEM || JSON_HAS_EXPERIMENTAL_FILESYSTEM
 // JSON_HAS_CPP_17 (do not remove; see note at top of file)
 SECTION("issue #3070 - Version 3.10.3 breaks backward-compatibility with 3.10.2 ")
 {
 nlohmann::detail::std_fs::path text_path("/tmp/text.txt");
 const json j(text_path);

 const auto j_path = j.get<nlohmann::detail::std_fs::path>();
 CHECK(j_path == text_path);

#if DOCTEST_CLANG || DOCTEST_GCC >= DOCTEST_COMPILER(8, 4, 0)
 // only known to work on Clang and GCC >=8.4
 CHECK_THROWS_WITH_AS(nlohmann::detail::std_fs::path(json(1)), "[json.exception.type_error.302] type must be string, but is number", json::type_error);
#endif
 }
#endif

 SECTION("issue #3077 - explicit constructor with default does not compile")
 {
 json j;
 j[0]["value"] = true;
 std::vector<FooBar> foo;
 j.get_to(foo);
 }

 SECTION("issue #3108 - ordered_json doesn't support range based erase")
 {
 ordered_json j = {1, 2, 2, 4};

 auto last = std::unique(j.begin(), j.end());
 j.erase(last, j.end());

 CHECK(j.dump() == "[1,2,4]");

 j.erase(std::remove_if(j.begin(), j.end(), [](const ordered_json & val)
 {
 return val == 2;
 }), j.end());

 CHECK(j.dump() == "[1,4]");
 }

 SECTION("issue #3343 - json and ordered_json are not interchangeable")
 {
 json::object_t jobj({ { "product", "one" } });
 ordered_json::object_t ojobj({{"product", "one"}});

 auto jit = jobj.begin();
 auto ojit = ojobj.begin();

 CHECK(jit->first == ojit->first);
 CHECK(jit->second.get<std::string>() == ojit->second.get<std::string>());
 }

 SECTION("issue #3171 - if class is_constructible from std::string wrong from_json overload is being selected, compilation failed")
 {
 const json j{{ "str", "value"}};

 // failed with: error: no match for ‘operator=’ (operand types are ‘for_3171_derived’ and ‘const nlohmann::basic_json<>::string_t’
 // {aka ‘const std::__cxx11::basic_string<char>’})
 // s = *j.template get_ptr<const typename BasicJsonType::string_t*>();
 auto td = j.get<for_3171_derived>();

 CHECK(td.str == "value");
 }

#ifdef JSON_HAS_CPP_20
 SECTION("issue #3312 - Parse to custom class from unordered_json breaks on G++11.2.0 with C++20")
 {
 // see test for #3171
 const ordered_json j = {{"name", "class"}};
 for_3312 obj{};

 j.get_to(obj);

 CHECK(obj.name == "class");
 }
#endif

#if defined(JSON_HAS_CPP_17) && JSON_USE_IMPLICIT_CONVERSIONS
 SECTION("issue #3428 - Error occurred when converting nlohmann::json to std::any")
 {
 const json j;
 const std::any a1 = j;
 std::any&& a2 = j;

 CHECK(a1.type() == typeid(j));
 CHECK(a2.type() == typeid(j));
 }
#endif

 SECTION("issue #3204 - ambiguous regression")
 {
 for_3204_bar bar_from_foo([](for_3204_foo) noexcept {}); // NOLINT(performance-unnecessary-value-param)
 for_3204_bar bar_from_json([](json) noexcept {}); // NOLINT(performance-unnecessary-value-param)

 CHECK(bar_from_foo.constructed_from == for_3204_bar::constructed_from_foo);
 CHECK(bar_from_json.constructed_from == for_3204_bar::constructed_from_json);
 }

 SECTION("issue #3333 - Ambiguous conversion from nlohmann::basic_json<> to custom class")
 {
 const json j
 {
 {"x", 1},
 {"y", 2}
 };
 for_3333 p = j;

 CHECK(p.x == 1);
 CHECK(p.y == 2);
 }
}

DOCTEST_CLANG_SUPPRESS_WARNING_POP