tests/src/unit-udt_macro.cpp

//     __ _____ _____ _____
//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
// |  |  |__   |  |  | | | |  version 3.12.0
// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
//
// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
// SPDX-License-Identifier: MIT

#include <string>
#include <vector>
#include "doctest_compatibility.h"

#include <nlohmann/json.hpp>
using nlohmann::json;

namespace persons
{
class person_with_private_data
{
  private:
    std::string name{}; // NOLINT(readability-redundant-member-init)
    int age = 0;
    json metadata = nullptr;

  public:
    bool operator==(const person_with_private_data& rhs) const
    {
        return name == rhs.name && age == rhs.age && metadata == rhs.metadata;
    }

    person_with_private_data() = default;
    person_with_private_data(std::string name_, int age_, json metadata_)
        : name(std::move(name_))
        , age(age_)
        , metadata(std::move(metadata_))
    {}

    NLOHMANN_DEFINE_TYPE_INTRUSIVE(person_with_private_data, age, name, metadata)
};

class derived_person_with_private_data : public person_with_private_data
{
  private:
    std::string hair_color{"blue"};

  public:
    bool operator==(const derived_person_with_private_data& rhs) const
    {
        return person_with_private_data::operator==(rhs) && hair_color == rhs.hair_color;
    }

    derived_person_with_private_data() = default;
    derived_person_with_private_data(std::string name_, int age_, json metadata_, std::string hair_color_)
        : person_with_private_data(std::move(name_), age_, std::move(metadata_))
        , hair_color(std::move(hair_color_))
    {}

    NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE(derived_person_with_private_data, person_with_private_data, hair_color)
};

class person_with_private_data_2
{
  private:
    std::string name{}; // NOLINT(readability-redundant-member-init)
    int age = 0;
    json metadata = nullptr;

  public:
    bool operator==(const person_with_private_data_2& rhs) const
    {
        return name == rhs.name && age == rhs.age && metadata == rhs.metadata;
    }

    person_with_private_data_2() = default;
    person_with_private_data_2(std::string name_, int age_, json metadata_)
        : name(std::move(name_))
        , age(age_)
        , metadata(std::move(metadata_))
    {}

    std::string getName() const
    {
        return name;
    }
    int getAge() const
    {
        return age;
    }
    json getMetadata() const
    {
        return metadata;
    }

    NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT(person_with_private_data_2, age, name, metadata)
};

class person_with_private_data_3
{
  private:
    std::string name{}; // NOLINT(readability-redundant-member-init)
    int age = 0;
    json metadata = nullptr;

  public:
    bool operator==(const person_with_private_data_3& rhs) const
    {
        return name == rhs.name && age == rhs.age && metadata == rhs.metadata;
    }

    person_with_private_data_3() = default;
    person_with_private_data_3(std::string name_, int age_, json metadata_)
        : name(std::move(name_))
        , age(age_)
        , metadata(std::move(metadata_))
    {}

    NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_NAMES(person_with_private_data_3, "json_age", age, "json_name", name, "json_metadata", metadata)
};

class derived_person_with_private_data_3 : public person_with_private_data_3
{
  private:
    std::string hair_color{"blue"};

  public:
    bool operator==(const derived_person_with_private_data_3& rhs) const
    {
        return person_with_private_data_3::operator==(rhs) && hair_color == rhs.hair_color;
    }

    derived_person_with_private_data_3() = default;
    derived_person_with_private_data_3(std::string name_, int age_, json metadata_, std::string hair_color_)
        : person_with_private_data_3(std::move(name_), age_, std::move(metadata_))
        , hair_color(std::move(hair_color_))
    {}

    NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_NAMES(derived_person_with_private_data_3, person_with_private_data_3, "json_hair_color", hair_color)
};

class person_with_private_data_4
{
  private:
    std::string name{}; // NOLINT(readability-redundant-member-init)
    int age = 0;
    json metadata = nullptr;

  public:
    bool operator==(const person_with_private_data_4& rhs) const
    {
        return name == rhs.name && age == rhs.age && metadata == rhs.metadata;
    }

    person_with_private_data_4() = default;
    person_with_private_data_4(std::string name_, int age_, json metadata_)
        : name(std::move(name_))
        , age(age_)
        , metadata(std::move(metadata_))
    {}

    std::string getName() const
    {
        return name;
    }
    int getAge() const
    {
        return age;
    }
    json getMetadata() const
    {
        return metadata;
    }

    NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT_WITH_NAMES(person_with_private_data_4, "json_age", age, "json_name", name, "json_metadata", metadata)
};

class derived_person_with_private_data_2 : public person_with_private_data_2
{
  private:
    std::string hair_color{"blue"};

  public:
    bool operator==(const derived_person_with_private_data_2& rhs) const
    {
        return person_with_private_data_2::operator==(rhs) && hair_color == rhs.hair_color;
    }

    derived_person_with_private_data_2() = default;
    derived_person_with_private_data_2(std::string name_, int age_, json metadata_, std::string hair_color_)
        : person_with_private_data_2(std::move(name_), age_, std::move(metadata_))
        , hair_color(std::move(hair_color_))
    {}

    std::string getHairColor() const
    {
        return hair_color;
    }

    NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_DEFAULT(derived_person_with_private_data_2, person_with_private_data_2, hair_color)
};

class derived_person_with_private_data_4 : public person_with_private_data_4
{
  private:
    std::string hair_color{"blue"};

  public:
    bool operator==(const derived_person_with_private_data_4& rhs) const
    {
        return person_with_private_data_4::operator==(rhs) && hair_color == rhs.hair_color;
    }

    derived_person_with_private_data_4() = default;
    derived_person_with_private_data_4(std::string name_, int age_, json metadata_, std::string hair_color_)
        : person_with_private_data_4(std::move(name_), age_, std::move(metadata_))
        , hair_color(std::move(hair_color_))
    {}

    std::string getHairColor() const
    {
        return hair_color;
    }

    NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_DEFAULT_WITH_NAMES(derived_person_with_private_data_4, person_with_private_data_4, "json_hair_color", hair_color)
};

class person_without_private_data_1
{
  public:
    std::string name{}; // NOLINT(readability-redundant-member-init)
    int age = 0;
    json metadata = nullptr;

    bool operator==(const person_without_private_data_1& rhs) const
    {
        return name == rhs.name && age == rhs.age && metadata == rhs.metadata;
    }

    person_without_private_data_1() = default;
    person_without_private_data_1(std::string name_, int age_, json metadata_)
        : name(std::move(name_))
        , age(age_)
        , metadata(std::move(metadata_))
    {}

    NLOHMANN_DEFINE_TYPE_INTRUSIVE(person_without_private_data_1, age, name, metadata)
};

class derived_person_without_private_data_1 : public person_without_private_data_1
{
  public:
    std::string hair_color{"blue"};

  public:
    bool operator==(const derived_person_without_private_data_1& rhs) const
    {
        return person_without_private_data_1::operator==(rhs) && hair_color == rhs.hair_color;
    }

    derived_person_without_private_data_1() = default;
    derived_person_without_private_data_1(std::string name_, int age_, json metadata_, std::string hair_color_)
        : person_without_private_data_1(std::move(name_), age_, std::move(metadata_))
        , hair_color(std::move(hair_color_))
    {}

    NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE(derived_person_without_private_data_1, person_without_private_data_1, hair_color)
};

class person_without_private_data_2
{
  public:
    std::string name{}; // NOLINT(readability-redundant-member-init)
    int age = 0;
    json metadata = nullptr;

    bool operator==(const person_without_private_data_2& rhs) const
    {
        return name == rhs.name && age == rhs.age && metadata == rhs.metadata;
    }

    person_without_private_data_2() = default;
    person_without_private_data_2(std::string name_, int age_, json metadata_)
        : name(std::move(name_))
        , age(age_)
        , metadata(std::move(metadata_))
    {}
};

// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(person_without_private_data_2, age, name, metadata)

class derived_person_without_private_data_2 : public person_without_private_data_2
{
  public:
    std::string hair_color{"blue"};

  public:
    bool operator==(const derived_person_without_private_data_2& rhs) const
    {
        return person_without_private_data_2::operator==(rhs) && hair_color == rhs.hair_color;
    }

    derived_person_without_private_data_2() = default;
    derived_person_without_private_data_2(std::string name_, int age_, json metadata_, std::string hair_color_)
        : person_without_private_data_2(std::move(name_), age_, std::move(metadata_))
        , hair_color(std::move(hair_color_))
    {}
};

// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE(derived_person_without_private_data_2, person_without_private_data_2, hair_color)

class person_without_private_data_3
{
  public:
    std::string name{}; // NOLINT(readability-redundant-member-init)
    int age = 0;
    json metadata = nullptr;

    bool operator==(const person_without_private_data_3& rhs) const
    {
        return name == rhs.name && age == rhs.age && metadata == rhs.metadata;
    }

    person_without_private_data_3() = default;
    person_without_private_data_3(std::string name_, int age_, json metadata_)
        : name(std::move(name_))
        , age(age_)
        , metadata(std::move(metadata_))
    {}

    std::string getName() const
    {
        return name;
    }
    int getAge() const
    {
        return age;
    }
    json getMetadata() const
    {
        return metadata;
    }
};

// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT(person_without_private_data_3, age, name, metadata)

class derived_person_without_private_data_3 : public person_without_private_data_3
{
  public:
    std::string hair_color{"blue"};

  public:
    bool operator==(const derived_person_without_private_data_3& rhs) const
    {
        return person_without_private_data_3::operator==(rhs) && hair_color == rhs.hair_color;
    }

    derived_person_without_private_data_3() = default;
    derived_person_without_private_data_3(std::string name_, int age_, json metadata_, std::string hair_color_)
        : person_without_private_data_3(std::move(name_), age_, std::move(metadata_))
        , hair_color(std::move(hair_color_))
    {}

    std::string getHairColor() const
    {
        return hair_color;
    }
};

// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_DEFAULT(derived_person_without_private_data_3, person_without_private_data_3, hair_color)

class person_without_private_data_4
{
  public:
    std::string name{}; // NOLINT(readability-redundant-member-init)
    int age = 0;
    json metadata = nullptr;

    bool operator==(const person_without_private_data_4& rhs) const
    {
        return name == rhs.name && age == rhs.age && metadata == rhs.metadata;
    }

    person_without_private_data_4() = default;
    person_without_private_data_4(std::string name_, int age_, json metadata_)
        : name(std::move(name_))
        , age(age_)
        , metadata(std::move(metadata_))
    {}

    NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_NAMES(person_without_private_data_4, "json_age", age, "json_name", name, "json_metadata", metadata)
};

class derived_person_without_private_data_4 : public person_without_private_data_4
{
  public:
    std::string hair_color{"blue"};

  public:
    bool operator==(const derived_person_without_private_data_4& rhs) const
    {
        return person_without_private_data_4::operator==(rhs) && hair_color == rhs.hair_color;
    }

    derived_person_without_private_data_4() = default;
    derived_person_without_private_data_4(std::string name_, int age_, json metadata_, std::string hair_color_)
        : person_without_private_data_4(std::move(name_), age_, std::move(metadata_))
        , hair_color(std::move(hair_color_))
    {}

    NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_NAMES(derived_person_without_private_data_4, person_without_private_data_4, "json_hair_color", hair_color)
};

class person_without_private_data_5
{
  public:
    std::string name{}; // NOLINT(readability-redundant-member-init)
    int age = 0;
    json metadata = nullptr;

    bool operator==(const person_without_private_data_5& rhs) const
    {
        return name == rhs.name && age == rhs.age && metadata == rhs.metadata;
    }

    person_without_private_data_5() = default;
    person_without_private_data_5(std::string name_, int age_, json metadata_)
        : name(std::move(name_))
        , age(age_)
        , metadata(std::move(metadata_))
    {}
};

// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_NAMES(person_without_private_data_5, "json_age", age, "json_name", name, "json_metadata", metadata)

class derived_person_without_private_data_5 : public person_without_private_data_5
{
  public:
    std::string hair_color{"blue"};

  public:
    bool operator==(const derived_person_without_private_data_5& rhs) const
    {
        return person_without_private_data_5::operator==(rhs) && hair_color == rhs.hair_color;
    }

    derived_person_without_private_data_5() = default;
    derived_person_without_private_data_5(std::string name_, int age_, json metadata_, std::string hair_color_)
        : person_without_private_data_5(std::move(name_), age_, std::move(metadata_))
        , hair_color(std::move(hair_color_))
    {}
};

// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_NAMES(derived_person_without_private_data_5, person_without_private_data_5, "json_hair_color", hair_color)

class person_without_private_data_6
{
  public:
    std::string name{}; // NOLINT(readability-redundant-member-init)
    int age = 0;
    json metadata = nullptr;

    bool operator==(const person_without_private_data_6& rhs) const
    {
        return name == rhs.name && age == rhs.age && metadata == rhs.metadata;
    }

    person_without_private_data_6() = default;
    person_without_private_data_6(std::string name_, int age_, json metadata_)
        : name(std::move(name_))
        , age(age_)
        , metadata(std::move(metadata_))
    {}

    std::string getName() const
    {
        return name;
    }
    int getAge() const
    {
        return age;
    }
    json getMetadata() const
    {
        return metadata;
    }
};

// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT_WITH_NAMES(person_without_private_data_6, "json_age", age, "json_name", name, "json_metadata", metadata)

class derived_person_without_private_data_6 : public person_without_private_data_6
{
  public:
    std::string hair_color{"blue"};

  public:
    bool operator==(const derived_person_without_private_data_6& rhs) const
    {
        return person_without_private_data_6::operator==(rhs) && hair_color == rhs.hair_color;
    }

    derived_person_without_private_data_6() = default;
    derived_person_without_private_data_6(std::string name_, int age_, json metadata_, std::string hair_color_)
        : person_without_private_data_6(std::move(name_), age_, std::move(metadata_))
        , hair_color(std::move(hair_color_))
    {}

    std::string getHairColor() const
    {
        return hair_color;
    }
};

// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_DEFAULT_WITH_NAMES(derived_person_without_private_data_6, person_without_private_data_6, "json_hair_color", hair_color)

class person_with_private_alphabet
{
  public:
    bool operator==(const person_with_private_alphabet& other) const
    {
        return  a == other.a &&
                b == other.b &&
                c == other.c &&
                d == other.d &&
                e == other.e &&
                f == other.f &&
                g == other.g &&
                h == other.h &&
                i == other.i &&
                j == other.j &&
                k == other.k &&
                l == other.l &&
                m == other.m &&
                n == other.n &&
                o == other.o &&
                p == other.p &&
                q == other.q &&
                r == other.r &&
                s == other.s &&
                t == other.t &&
                u == other.u &&
                v == other.v &&
                w == other.w &&
                x == other.x &&
                y == other.y &&
                z == other.z;
    }

  private:
    int a = 0;
    int b = 0;
    int c = 0;
    int d = 0;
    int e = 0;
    int f = 0;
    int g = 0;
    int h = 0;
    int i = 0;
    int j = 0;
    int k = 0;
    int l = 0;
    int m = 0;
    int n = 0;
    int o = 0;
    int p = 0;
    int q = 0;
    int r = 0;
    int s = 0;
    int t = 0;
    int u = 0;
    int v = 0;
    int w = 0;
    int x = 0;
    int y = 0;
    int z = 0;
    NLOHMANN_DEFINE_TYPE_INTRUSIVE(person_with_private_alphabet, a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z)
};

class person_with_public_alphabet
{
  public:
    bool operator==(const person_with_public_alphabet& other) const
    {
        return  a == other.a &&
                b == other.b &&
                c == other.c &&
                d == other.d &&
                e == other.e &&
                f == other.f &&
                g == other.g &&
                h == other.h &&
                i == other.i &&
                j == other.j &&
                k == other.k &&
                l == other.l &&
                m == other.m &&
                n == other.n &&
                o == other.o &&
                p == other.p &&
                q == other.q &&
                r == other.r &&
                s == other.s &&
                t == other.t &&
                u == other.u &&
                v == other.v &&
                w == other.w &&
                x == other.x &&
                y == other.y &&
                z == other.z;
    }

    int a = 0;
    int b = 0;
    int c = 0;
    int d = 0;
    int e = 0;
    int f = 0;
    int g = 0;
    int h = 0;
    int i = 0;
    int j = 0;
    int k = 0;
    int l = 0;
    int m = 0;
    int n = 0;
    int o = 0;
    int p = 0;
    int q = 0;
    int r = 0;
    int s = 0;
    int t = 0;
    int u = 0;
    int v = 0;
    int w = 0;
    int x = 0;
    int y = 0;
    int z = 0;
};

// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(person_with_public_alphabet, a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z)

class person_without_default_constructor_1
{
  public:
    std::string name;
    int age;

    bool operator==(const person_without_default_constructor_1& other) const
    {
        return name == other.name && age == other.age;
    }

    person_without_default_constructor_1(std::string name_, int age_)
        : name{std::move(name_)}
        , age{age_}
    {}

    NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE(person_without_default_constructor_1, name, age)
};

class person_without_default_constructor_2
{
  public:
    std::string name;
    int age;

    bool operator==(const person_without_default_constructor_2& other) const
    {
        return name == other.name && age == other.age;
    }

    person_without_default_constructor_2(std::string name_, int age_)
        : name{std::move(name_)}
        , age{age_}
    {}
};

// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE(person_without_default_constructor_2, name, age)

class person_without_default_constructor_3
{
  public:
    std::string name;
    int age;

    bool operator==(const person_without_default_constructor_3& other) const
    {
        return name == other.name && age == other.age;
    }

    person_without_default_constructor_3(std::string name_, int age_)
        : name{std::move(name_)}
        , age{age_}
    {}

    NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES(person_without_default_constructor_3, "json_name", name, "json_age", age)
};

class person_without_default_constructor_4
{
  public:
    std::string name;
    int age;

    bool operator==(const person_without_default_constructor_4& other) const
    {
        return name == other.name && age == other.age;
    }

    person_without_default_constructor_4(std::string name_, int age_)
        : name{std::move(name_)}
        , age{age_}
    {}
};

// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES(person_without_default_constructor_4, "json_name", name, "json_age", age)

class derived_person_only_serialize_public_1 : public person_without_default_constructor_1
{
  public:
    std::string hair_color;

    derived_person_only_serialize_public_1(std::string name_, int age_, std::string hair_color_)
        : person_without_default_constructor_1(std::move(name_), age_)
        , hair_color(std::move(hair_color_))
    {}
};

// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE(derived_person_only_serialize_public_1, person_without_default_constructor_1, hair_color)

class derived_person_only_serialize_public_3 : public person_without_default_constructor_3
{
  public:
    std::string hair_color;

    derived_person_only_serialize_public_3(std::string name_, int age_, std::string hair_color_)
        : person_without_default_constructor_3(std::move(name_), age_)
        , hair_color(std::move(hair_color_))
    {}
};

// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES(derived_person_only_serialize_public_3, person_without_default_constructor_3, "json_hair_color", hair_color)

class derived_person_only_serialize_private_1 : person_without_default_constructor_1
{
  private:
    std::string hair_color;
  public:
    derived_person_only_serialize_private_1(std::string name_, int age_, std::string hair_color_)
        : person_without_default_constructor_1(std::move(name_), age_)
        , hair_color(std::move(hair_color_))
    {}

    NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_ONLY_SERIALIZE(derived_person_only_serialize_private_1, person_without_default_constructor_1, hair_color)
};

class derived_person_only_serialize_private_3 : person_without_default_constructor_3
{
  private:
    std::string hair_color;
  public:
    derived_person_only_serialize_private_3(std::string name_, int age_, std::string hair_color_)
        : person_without_default_constructor_3(std::move(name_), age_)
        , hair_color(std::move(hair_color_))
    {}

    NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES(derived_person_only_serialize_private_3, person_without_default_constructor_3, "json_hair_color", hair_color)
};

// Zero-member types for issue #4041: NLOHMANN_DEFINE_TYPE_* and
// NLOHMANN_DEFINE_DERIVED_TYPE_* must compile and produce a valid (empty)
// JSON object when no member arguments are given.
class empty_intrusive
{
  public:
    bool operator==(const empty_intrusive& /*rhs*/) const
    {
        return true;
    }
    NLOHMANN_DEFINE_TYPE_INTRUSIVE(empty_intrusive)
};

class empty_intrusive_with_default
{
  public:
    bool operator==(const empty_intrusive_with_default& /*rhs*/) const
    {
        return true;
    }
    NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT(empty_intrusive_with_default)
};

class empty_intrusive_only_serialize
{
  public:
    NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE(empty_intrusive_only_serialize)
};

class empty_non_intrusive
{
  public:
    bool operator==(const empty_non_intrusive& /*rhs*/) const
    {
        return true;
    }
};
// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(empty_non_intrusive)

class empty_non_intrusive_with_default
{
  public:
    bool operator==(const empty_non_intrusive_with_default& /*rhs*/) const
    {
        return true;
    }
};
// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT(empty_non_intrusive_with_default)

class empty_non_intrusive_only_serialize {};
// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE(empty_non_intrusive_only_serialize)

class empty_derived_intrusive : public person_with_private_data
{
  public:
    empty_derived_intrusive() = default;
    empty_derived_intrusive(std::string name_, int age_, json metadata_)
        : person_with_private_data(std::move(name_), age_, std::move(metadata_))
    {}
    NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE(empty_derived_intrusive, person_with_private_data)
};

class empty_derived_intrusive_with_default : public person_with_private_data
{
  public:
    empty_derived_intrusive_with_default() = default;
    empty_derived_intrusive_with_default(std::string name_, int age_, json metadata_)
        : person_with_private_data(std::move(name_), age_, std::move(metadata_))
    {}
    NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_DEFAULT(empty_derived_intrusive_with_default, person_with_private_data)
};

class empty_derived_intrusive_only_serialize : public person_with_private_data
{
  public:
    empty_derived_intrusive_only_serialize() = default;
    empty_derived_intrusive_only_serialize(std::string name_, int age_, json metadata_)
        : person_with_private_data(std::move(name_), age_, std::move(metadata_))
    {}
    NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_ONLY_SERIALIZE(empty_derived_intrusive_only_serialize, person_with_private_data)
};

class empty_derived_non_intrusive : public person_with_private_data
{
  public:
    empty_derived_non_intrusive() = default;
    empty_derived_non_intrusive(std::string name_, int age_, json metadata_)
        : person_with_private_data(std::move(name_), age_, std::move(metadata_))
    {}
};
// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE(empty_derived_non_intrusive, person_with_private_data)

class empty_derived_non_intrusive_with_default : public person_with_private_data
{
  public:
    empty_derived_non_intrusive_with_default() = default;
    empty_derived_non_intrusive_with_default(std::string name_, int age_, json metadata_)
        : person_with_private_data(std::move(name_), age_, std::move(metadata_))
    {}
};
// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_DEFAULT(empty_derived_non_intrusive_with_default, person_with_private_data)

class empty_derived_non_intrusive_only_serialize : public person_with_private_data
{
  public:
    empty_derived_non_intrusive_only_serialize() = default;
    empty_derived_non_intrusive_only_serialize(std::string name_, int age_, json metadata_)
        : person_with_private_data(std::move(name_), age_, std::move(metadata_))
    {}
};
// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE(empty_derived_non_intrusive_only_serialize, person_with_private_data)

// Types at the documented maximum member count (63) for issue #4041's
// argument-count dispatch. The derived-type macros carry a two-token
// Type,BaseType prefix, so they reach two slots further into
// NLOHMANN_JSON_GET_MACRO than the non-derived ones and are the first to break
// if the tag dispatch runs out of positional slots.
class max_members
{
  public:
    int m1{}, m2{}, m3{}, m4{}, m5{}, m6{}, m7{}, m8{}, m9{}, m10{}, m11{}, m12{}, m13{}, m14{}, m15{}, m16{}, m17{}, m18{}, m19{}, m20{}, m21{}, m22{}, m23{}, m24{}, m25{}, m26{}, m27{}, m28{}, m29{}, m30{}, m31{}, m32{}, m33{}, m34{}, m35{}, m36{}, m37{}, m38{}, m39{}, m40{}, m41{}, m42{}, m43{}, m44{}, m45{}, m46{}, m47{}, m48{}, m49{}, m50{}, m51{}, m52{}, m53{}, m54{}, m55{}, m56{}, m57{}, m58{}, m59{}, m60{}, m61{}, m62{}, m63{};

    NLOHMANN_DEFINE_TYPE_INTRUSIVE(max_members, m1, m2, m3, m4, m5, m6, m7, m8, m9, m10, m11, m12, m13, m14, m15, m16, m17, m18, m19, m20, m21, m22, m23, m24, m25, m26, m27, m28, m29, m30, m31, m32, m33, m34, m35, m36, m37, m38, m39, m40, m41, m42, m43, m44, m45, m46, m47, m48, m49, m50, m51, m52, m53, m54, m55, m56, m57, m58, m59, m60, m61, m62, m63)
};

class max_members_base
{
  public:
    int base_value = 0;

    NLOHMANN_DEFINE_TYPE_INTRUSIVE(max_members_base, base_value)
};

class max_members_derived : public max_members_base
{
  public:
    int m1{}, m2{}, m3{}, m4{}, m5{}, m6{}, m7{}, m8{}, m9{}, m10{}, m11{}, m12{}, m13{}, m14{}, m15{}, m16{}, m17{}, m18{}, m19{}, m20{}, m21{}, m22{}, m23{}, m24{}, m25{}, m26{}, m27{}, m28{}, m29{}, m30{}, m31{}, m32{}, m33{}, m34{}, m35{}, m36{}, m37{}, m38{}, m39{}, m40{}, m41{}, m42{}, m43{}, m44{}, m45{}, m46{}, m47{}, m48{}, m49{}, m50{}, m51{}, m52{}, m53{}, m54{}, m55{}, m56{}, m57{}, m58{}, m59{}, m60{}, m61{}, m62{}, m63{};

    NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE(max_members_derived, max_members_base, m1, m2, m3, m4, m5, m6, m7, m8, m9, m10, m11, m12, m13, m14, m15, m16, m17, m18, m19, m20, m21, m22, m23, m24, m25, m26, m27, m28, m29, m30, m31, m32, m33, m34, m35, m36, m37, m38, m39, m40, m41, m42, m43, m44, m45, m46, m47, m48, m49, m50, m51, m52, m53, m54, m55, m56, m57, m58, m59, m60, m61, m62, m63)
};

// User macros named like the dispatch suffixes (EMPTY is a common empty-macro
// idiom) must not leak into the NLOHMANN_DEFINE_TYPE_* dispatch.
#define EMPTY
#define MEMBERS clobbered_by_user_macro

class dispatch_with_user_macros_empty
{
  public:
    NLOHMANN_DEFINE_TYPE_INTRUSIVE(dispatch_with_user_macros_empty)
};

class dispatch_with_user_macros_members
{
  public:
    int value = 0;

    NLOHMANN_DEFINE_TYPE_INTRUSIVE(dispatch_with_user_macros_members, value)
};

class dispatch_with_user_macros_derived_empty : public dispatch_with_user_macros_members
{
};
// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE(dispatch_with_user_macros_derived_empty, dispatch_with_user_macros_members)

class dispatch_with_user_macros_derived_members : public dispatch_with_user_macros_members
{
  public:
    int own = 0;
};
// NOLINTNEXTLINE(misc-use-internal-linkage)
NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE(dispatch_with_user_macros_derived_members, dispatch_with_user_macros_members, own)

// testing for the macros also keeps -Wunused-macros from rejecting them
#if !defined(EMPTY) || !defined(MEMBERS)
    #error "EMPTY and MEMBERS must stay defined for the tests above"
#endif
#undef EMPTY
#undef MEMBERS

} // namespace persons

TEST_CASE_TEMPLATE("Serialization/deserialization via NLOHMANN_DEFINE_TYPE_INTRUSIVE and NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE", Pair, // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization)
                   std::pair<nlohmann::json, persons::person_with_private_data>,
                   std::pair<nlohmann::json, persons::person_without_private_data_1>,
                   std::pair<nlohmann::json, persons::person_without_private_data_2>,
                   std::pair<nlohmann::ordered_json, persons::person_with_private_data>,
                   std::pair<nlohmann::ordered_json, persons::person_without_private_data_1>,
                   std::pair<nlohmann::ordered_json, persons::person_without_private_data_2>)
{
    using Json = typename Pair::first_type;
    using T = typename Pair::second_type;
    constexpr bool is_ordered = std::is_same<Json, nlohmann::ordered_json>::value;

    SECTION("person")
    {
        // serialization
        T p1("Erik", 1, {{"haircuts", 2}});
        CHECK(Json(p1).dump() == (is_ordered ?
                                  R"({"age":1,"name":"Erik","metadata":{"haircuts":2}})" :
                                  R"({"age":1,"metadata":{"haircuts":2},"name":"Erik"})"));

        // deserialization
        auto p2 = Json(p1).template get<T>();
        CHECK(p2 == p1);

        // roundtrip
        CHECK(T(Json(p1)) == p1);
        CHECK(Json(T(Json(p1))) == Json(p1));

        // check exception in case of missing field
        Json j = Json(p1);
        j.erase("age");
        CHECK_THROWS_WITH_AS(j.template get<T>(), "[json.exception.out_of_range.403] key 'age' not found", typename Json::out_of_range);
    }
}

TEST_CASE_TEMPLATE("Serialization/deserialization via NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE and NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE", Pair, // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization)
                   std::pair<nlohmann::json, persons::derived_person_with_private_data>,
                   std::pair<nlohmann::json, persons::derived_person_without_private_data_1>,
                   std::pair<nlohmann::json, persons::derived_person_without_private_data_2>,
                   std::pair<nlohmann::ordered_json, persons::derived_person_with_private_data>,
                   std::pair<nlohmann::ordered_json, persons::derived_person_without_private_data_1>,
                   std::pair<nlohmann::ordered_json, persons::derived_person_without_private_data_2>)
{
    using Json = typename Pair::first_type;
    using T = typename Pair::second_type;
    constexpr bool is_ordered = std::is_same<Json, nlohmann::ordered_json>::value;

    SECTION("person")
    {
        // serialization
        T p1("Erik", 1, {{"haircuts", 2}}, "red");
        CHECK(Json(p1).dump() == (is_ordered ?
                                  R"({"age":1,"name":"Erik","metadata":{"haircuts":2},"hair_color":"red"})" :
                                  R"({"age":1,"hair_color":"red","metadata":{"haircuts":2},"name":"Erik"})"));

        // deserialization
        auto p2 = Json(p1).template get<T>();
        CHECK(p2 == p1);

        // roundtrip
        CHECK(T(Json(p1)) == p1);
        CHECK(Json(T(Json(p1))) == Json(p1));

        // check exception in case of missing field
        Json j = Json(p1);
        j.erase("age");
        CHECK_THROWS_WITH_AS(j.template get<T>(), "[json.exception.out_of_range.403] key 'age' not found", typename Json::out_of_range);
    }
}

TEST_CASE_TEMPLATE("Serialization/deserialization via NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_NAMES and NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_NAMES", T, // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization)
                   persons::person_with_private_data_3,
                   persons::person_without_private_data_4,
                   persons::person_without_private_data_5)
{
    SECTION("person")
    {
        // serialization
        T p1("Erik", 1, {{"haircuts", 2}});
        CHECK(json(p1).dump() == "{\"json_age\":1,\"json_metadata\":{\"haircuts\":2},\"json_name\":\"Erik\"}");

        // deserialization
        auto p2 = json(p1).get<T>();
        CHECK(p2 == p1);

        // roundtrip
        CHECK(T(json(p1)) == p1);
        CHECK(json(T(json(p1))) == json(p1));

        // check exception in case of missing field
        json j = json(p1);
        j.erase("json_age");
        CHECK_THROWS_WITH_AS(j.get<T>(), "[json.exception.out_of_range.403] key 'json_age' not found", json::out_of_range);
    }
}

TEST_CASE_TEMPLATE("Serialization/deserialization via NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_NAMES and NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_NAMES", T, // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization)
                   persons::derived_person_with_private_data_3,
                   persons::derived_person_without_private_data_4,
                   persons::derived_person_without_private_data_5)
{
    SECTION("person")
    {
        // serialization
        T p1("Erik", 1, {{"haircuts", 2}}, "red");
        CHECK(json(p1).dump() == "{\"json_age\":1,\"json_hair_color\":\"red\",\"json_metadata\":{\"haircuts\":2},\"json_name\":\"Erik\"}");

        // deserialization
        auto p2 = json(p1).get<T>();
        CHECK(p2 == p1);

        // roundtrip
        CHECK(T(json(p1)) == p1);
        CHECK(json(T(json(p1))) == json(p1));

        // check exception in case of missing field
        json j = json(p1);
        j.erase("json_age");
        CHECK_THROWS_WITH_AS(j.get<T>(), "[json.exception.out_of_range.403] key 'json_age' not found", json::out_of_range);
    }
}

TEST_CASE_TEMPLATE("Serialization/deserialization via NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT and NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT", Pair, // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization)
                   std::pair<nlohmann::json, persons::person_with_private_data_2>,
                   std::pair<nlohmann::json, persons::person_without_private_data_3>,
                   std::pair<nlohmann::ordered_json, persons::person_with_private_data_2>,
                   std::pair<nlohmann::ordered_json, persons::person_without_private_data_3>)
{
    using Json = typename Pair::first_type;
    using T = typename Pair::second_type;
    constexpr bool is_ordered = std::is_same<Json, nlohmann::ordered_json>::value;

    SECTION("person with default values")
    {
        // serialization of default constructed object
        const T p0{};
        CHECK(Json(p0).dump() == (is_ordered ?
                                  R"({"age":0,"name":"","metadata":null})" :
                                  R"({"age":0,"metadata":null,"name":""})"));

        // serialization
        T p1("Erik", 1, {{"haircuts", 2}});
        CHECK(Json(p1).dump() == (is_ordered ?
                                  R"({"age":1,"name":"Erik","metadata":{"haircuts":2}})" :
                                  R"({"age":1,"metadata":{"haircuts":2},"name":"Erik"})"));

        // deserialization
        auto p2 = Json(p1).template get<T>();
        CHECK(p2 == p1);

        // roundtrip
        CHECK(T(Json(p1)) == p1);
        CHECK(Json(T(Json(p1))) == Json(p1));

        // check default value in case of missing field
        Json j = Json(p1);
        j.erase("name");
        j.erase("age");
        j.erase("metadata");
        const T p3 = j.template get<T>();
        CHECK(p3.getName() == "");
        CHECK(p3.getAge() == 0);
        CHECK(p3.getMetadata() == nullptr);

        // check default value in case of empty json
        const Json j4;
        const T p4 = j4.template get<T>();
        CHECK(p4.getName() == "");
        CHECK(p4.getAge() == 0);
        CHECK(p4.getMetadata() == nullptr);
    }
}

TEST_CASE_TEMPLATE("Serialization/deserialization via NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_DEFAULT and NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_DEFAULT", Pair, // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization)
                   std::pair<nlohmann::json, persons::derived_person_with_private_data_2>,
                   std::pair<nlohmann::json, persons::derived_person_without_private_data_3>,
                   std::pair<nlohmann::ordered_json, persons::derived_person_with_private_data_2>,
                   std::pair<nlohmann::ordered_json, persons::derived_person_without_private_data_3>)
{
    using Json = typename Pair::first_type;
    using T = typename Pair::second_type;
    constexpr bool is_ordered = std::is_same<Json, nlohmann::ordered_json>::value;

    SECTION("derived person with default values")
    {
        // serialization of default constructed object
        const T p0{};
        CHECK(Json(p0).dump() == (is_ordered ?
                                  R"({"age":0,"name":"","metadata":null,"hair_color":"blue"})" :
                                  R"({"age":0,"hair_color":"blue","metadata":null,"name":""})"));

        // serialization
        T p1("Erik", 1, {{"haircuts", 2}}, "red");
        CHECK(Json(p1).dump() == (is_ordered ?
                                  R"({"age":1,"name":"Erik","metadata":{"haircuts":2},"hair_color":"red"})" :
                                  R"({"age":1,"hair_color":"red","metadata":{"haircuts":2},"name":"Erik"})"));

        // deserialization
        auto p2 = Json(p1).template get<T>();
        CHECK(p2 == p1);

        // roundtrip
        CHECK(T(Json(p1)) == p1);
        CHECK(Json(T(Json(p1))) == Json(p1));

        // check default value in case of missing field
        Json j = Json(p1);
        j.erase("name");
        j.erase("age");
        j.erase("metadata");
        j.erase("hair_color");
        const T p3 = j.template get<T>();
        CHECK(p3.getName() == "");
        CHECK(p3.getAge() == 0);
        CHECK(p3.getMetadata() == nullptr);
        CHECK(p3.getHairColor() == "blue");
    }
}

TEST_CASE_TEMPLATE("Serialization/deserialization via NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT_WITH_NAMES and NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT_WITH_NAMES", T, // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization)
                   persons::person_with_private_data_4,
                   persons::person_without_private_data_6)
{
    SECTION("person with default values")
    {
        // serialization of default constructed object
        T p0;
        CHECK(json(p0).dump() == "{\"json_age\":0,\"json_metadata\":null,\"json_name\":\"\"}");

        // serialization
        T p1("Erik", 1, {{"haircuts", 2}});
        CHECK(json(p1).dump() == "{\"json_age\":1,\"json_metadata\":{\"haircuts\":2},\"json_name\":\"Erik\"}");

        // deserialization
        auto p2 = json(p1).get<T>();
        CHECK(p2 == p1);

        // roundtrip
        CHECK(T(json(p1)) == p1);
        CHECK(json(T(json(p1))) == json(p1));

        // check default value in case of missing field
        json j = json(p1);
        j.erase("json_name");
        j.erase("json_age");
        j.erase("json_metadata");
        T p3 = j.get<T>();
        CHECK(p3.getName() == "");
        CHECK(p3.getAge() == 0);
        CHECK(p3.getMetadata() == nullptr);
    }
}

TEST_CASE_TEMPLATE("Serialization/deserialization via NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_DEFAULT_WITH_NAMES and NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_DEFAULT_WITH_NAMES", T, // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization)
                   persons::derived_person_with_private_data_4,
                   persons::derived_person_without_private_data_6)
{
    SECTION("derived person with default values")
    {
        // serialization of default constructed object
        T p0;
        CHECK(json(p0).dump() == "{\"json_age\":0,\"json_hair_color\":\"blue\",\"json_metadata\":null,\"json_name\":\"\"}");

        // serialization
        T p1("Erik", 1, {{"haircuts", 2}}, "red");
        CHECK(json(p1).dump() == "{\"json_age\":1,\"json_hair_color\":\"red\",\"json_metadata\":{\"haircuts\":2},\"json_name\":\"Erik\"}");

        // deserialization
        auto p2 = json(p1).get<T>();
        CHECK(p2 == p1);

        // roundtrip
        CHECK(T(json(p1)) == p1);
        CHECK(json(T(json(p1))) == json(p1));

        // check default value in case of missing field
        json j = json(p1);
        j.erase("json_name");
        j.erase("json_age");
        j.erase("json_metadata");
        j.erase("json_hair_color");
        T p3 = j.get<T>();
        CHECK(p3.getName() == "");
        CHECK(p3.getAge() == 0);
        CHECK(p3.getMetadata() == nullptr);
        CHECK(p3.getHairColor() == "blue");
    }
}

TEST_CASE_TEMPLATE("Serialization/deserialization of classes with 26 public/private member variables via NLOHMANN_DEFINE_TYPE_INTRUSIVE and NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE", Pair, // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization, bugprone-throwing-static-initialization)
                   std::pair<nlohmann::json, persons::person_with_private_alphabet>,
                   std::pair<nlohmann::json, persons::person_with_public_alphabet>,
                   std::pair<nlohmann::ordered_json, persons::person_with_private_alphabet>,
                   std::pair<nlohmann::ordered_json, persons::person_with_public_alphabet>)
{
    using Json = typename Pair::first_type;
    using T = typename Pair::second_type;

    SECTION("alphabet")
    {
        T obj1; // NOLINT(misc-const-correctness)
        Json const j = obj1;
        T obj2;
        j.get_to(obj2);
        CHECK(obj1 == obj2);
    }
}

TEST_CASE_TEMPLATE("Serialization of non-default-constructible classes via NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE and NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE", Pair, // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization, bugprone-throwing-static-initialization)
                   std::pair<nlohmann::json, persons::person_without_default_constructor_1>,
                   std::pair<nlohmann::json, persons::person_without_default_constructor_2>,
                   std::pair<nlohmann::ordered_json, persons::person_without_default_constructor_1>,
                   std::pair<nlohmann::ordered_json, persons::person_without_default_constructor_2>)
{
    using Json = typename Pair::first_type;
    using T = typename Pair::second_type;
    constexpr bool is_ordered = std::is_same<Json, nlohmann::ordered_json>::value;

    SECTION("person")
    {
        // serialization of a single object
        const T person{"Erik", 1};
        CHECK(Json(person).dump() == (is_ordered ?
                                      R"({"name":"Erik","age":1})" :
                                      R"({"age":1,"name":"Erik"})"));

        // serialization of a container with objects
        std::vector<T> const two_persons
        {
            {"Erik", 1},
            {"Kyle", 2}
        };
        CHECK(Json(two_persons).dump() == (is_ordered ?
                                           R"([{"name":"Erik","age":1},{"name":"Kyle","age":2}])" :
                                           R"([{"age":1,"name":"Erik"},{"age":2,"name":"Kyle"}])"));
    }
}

TEST_CASE_TEMPLATE("Serialization of non-default-constructible classes via NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES and NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES", T, // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization)
                   persons::person_without_default_constructor_3,
                   persons::person_without_default_constructor_4)
{
    SECTION("person")
    {
        {
            // serialization of a single object
            T person{"Erik", 1};
            CHECK(json(person).dump() == "{\"json_age\":1,\"json_name\":\"Erik\"}");

            // serialization of a container with objects
            std::vector<T> const two_persons
            {
                {"Erik", 1},
                {"Kyle", 2}
            };
            CHECK(json(two_persons).dump() == "[{\"json_age\":1,\"json_name\":\"Erik\"},{\"json_age\":2,\"json_name\":\"Kyle\"}]");
        }
    }
}

TEST_CASE_TEMPLATE("Serialization of non-default-constructible classes via NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_ONLY_SERIALIZE and NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE", Pair, // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization)
                   std::pair<nlohmann::json, persons::derived_person_only_serialize_public_1>,
                   std::pair<nlohmann::json, persons::derived_person_only_serialize_private_1>,
                   std::pair<nlohmann::ordered_json, persons::derived_person_only_serialize_public_1>,
                   std::pair<nlohmann::ordered_json, persons::derived_person_only_serialize_private_1>)
{
    using Json = typename Pair::first_type;
    using T = typename Pair::second_type;
    constexpr bool is_ordered = std::is_same<Json, nlohmann::ordered_json>::value;

    SECTION("derived person only serialize")
    {
        // serialization of a single object
        const T person{"Erik", 1, "brown"};
        CHECK(Json(person).dump() == (is_ordered ?
                                      R"({"name":"Erik","age":1,"hair_color":"brown"})" :
                                      R"({"age":1,"hair_color":"brown","name":"Erik"})"));

        // serialization of a container with objects
        std::vector<T> const two_persons
        {
            {"Erik", 1, "brown"},
            {"Kyle", 2, "black"}
        };
        CHECK(Json(two_persons).dump() == (is_ordered ?
                                           R"([{"name":"Erik","age":1,"hair_color":"brown"},{"name":"Kyle","age":2,"hair_color":"black"}])" :
                                           R"([{"age":1,"hair_color":"brown","name":"Erik"},{"age":2,"hair_color":"black","name":"Kyle"}])"));
    }
}

TEST_CASE_TEMPLATE("Serialization of non-default-constructible classes via NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES and NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES", T, // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization)
                   persons::derived_person_only_serialize_public_3,
                   persons::derived_person_only_serialize_private_3)
{
    SECTION("derived person only serialize")
    {
        {
            // serialization of a single object
            T person{"Erik", 1, "brown"};
            CHECK(json(person).dump() == "{\"json_age\":1,\"json_hair_color\":\"brown\",\"json_name\":\"Erik\"}");

            // serialization of a container with objects
            std::vector<T> const two_persons
            {
                {"Erik", 1, "brown"},
                {"Kyle", 2, "black"}
            };
            CHECK(json(two_persons).dump() == "[{\"json_age\":1,\"json_hair_color\":\"brown\",\"json_name\":\"Erik\"},{\"json_age\":2,\"json_hair_color\":\"black\",\"json_name\":\"Kyle\"}]");
        }
    }
}

// Regression tests for issue #4041: NLOHMANN_DEFINE_TYPE_* and
// NLOHMANN_DEFINE_DERIVED_TYPE_* macros must compile and produce valid
// (empty, or base-only for the derived case) JSON objects when no member
// arguments are given, on every supported C++ standard.
TEST_CASE_TEMPLATE("Serialization/deserialization of zero-member types via NLOHMANN_DEFINE_TYPE_* (issue #4041)", Json, // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization)
                   nlohmann::json, nlohmann::ordered_json)
{
    constexpr bool is_ordered = std::is_same<Json, nlohmann::ordered_json>::value;
    const char* const derived_dump = is_ordered
                                     ? R"({"age":1,"name":"Erik","metadata":null})"
                                     : R"({"age":1,"metadata":null,"name":"Erik"})";

    SECTION("NLOHMANN_DEFINE_TYPE_INTRUSIVE with zero members")
    {
        persons::empty_intrusive obj{};
        Json j = obj;
        CHECK(j.dump() == "{}");
        CHECK(j.template get<persons::empty_intrusive>() == obj);
    }

    SECTION("NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT with zero members")
    {
        persons::empty_intrusive_with_default obj{};
        Json j = obj;
        CHECK(j.dump() == "{}");
        CHECK(j.template get<persons::empty_intrusive_with_default>() == obj);
    }

    SECTION("NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE with zero members")
    {
        const persons::empty_intrusive_only_serialize obj{};
        Json j = obj;
        CHECK(j.dump() == "{}");
    }

    SECTION("NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE with zero members")
    {
        persons::empty_non_intrusive obj{};
        Json j = obj;
        CHECK(j.dump() == "{}");
        CHECK(j.template get<persons::empty_non_intrusive>() == obj);
    }

    SECTION("NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT with zero members")
    {
        persons::empty_non_intrusive_with_default obj{};
        Json j = obj;
        CHECK(j.dump() == "{}");
        CHECK(j.template get<persons::empty_non_intrusive_with_default>() == obj);
    }

    SECTION("NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE with zero members")
    {
        const persons::empty_non_intrusive_only_serialize obj{};
        Json j = obj;
        CHECK(j.dump() == "{}");
    }

    SECTION("NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE with zero own members")
    {
        persons::empty_derived_intrusive obj{"Erik", 1, nullptr};
        Json j = obj;
        CHECK(j.dump() == derived_dump);
        CHECK(j.template get<persons::empty_derived_intrusive>() == obj);
    }

    SECTION("NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_DEFAULT with zero own members")
    {
        persons::empty_derived_intrusive_with_default obj{"Erik", 1, nullptr};
        Json j = obj;
        CHECK(j.dump() == derived_dump);
        CHECK(j.template get<persons::empty_derived_intrusive_with_default>() == obj);
    }

    SECTION("NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_ONLY_SERIALIZE with zero own members")
    {
        const persons::empty_derived_intrusive_only_serialize obj{"Erik", 1, nullptr};
        Json j = obj;
        CHECK(j.dump() == derived_dump);
    }

    SECTION("NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE with zero own members")
    {
        persons::empty_derived_non_intrusive obj{"Erik", 1, nullptr};
        Json j = obj;
        CHECK(j.dump() == derived_dump);
        CHECK(j.template get<persons::empty_derived_non_intrusive>() == obj);
    }

    SECTION("NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_DEFAULT with zero own members")
    {
        persons::empty_derived_non_intrusive_with_default obj{"Erik", 1, nullptr};
        Json j = obj;
        CHECK(j.dump() == derived_dump);
        CHECK(j.template get<persons::empty_derived_non_intrusive_with_default>() == obj);
    }

    SECTION("NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE with zero own members")
    {
        const persons::empty_derived_non_intrusive_only_serialize obj{"Erik", 1, nullptr};
        Json j = obj;
        CHECK(j.dump() == derived_dump);
    }
}

// Regression test for the argument-count dispatch added for issue #4041: the
// documented maximum of 63 members must keep working, including for the
// derived-type macros whose Type,BaseType prefix consumes two dispatch slots.
TEST_CASE_TEMPLATE("Serialization/deserialization of maximum-member-count types via NLOHMANN_DEFINE_TYPE_*", Json, // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization)
                   nlohmann::json, nlohmann::ordered_json)
{
    SECTION("NLOHMANN_DEFINE_TYPE_INTRUSIVE with 63 members")
    {
        persons::max_members obj{};
        obj.m1 = 1;
        obj.m63 = 63;
        Json j = obj;
        CHECK(j.size() == 63);
        const auto obj2 = j.template get<persons::max_members>();
        CHECK(obj2.m1 == 1);
        CHECK(obj2.m63 == 63);
    }

    SECTION("NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE with 63 own members")
    {
        persons::max_members_derived obj{};
        obj.base_value = 7;
        obj.m1 = 1;
        obj.m63 = 63;
        Json j = obj;
        CHECK(j.size() == 64);
        const auto obj2 = j.template get<persons::max_members_derived>();
        CHECK(obj2.base_value == 7);
        CHECK(obj2.m1 == 1);
        CHECK(obj2.m63 == 63);
    }
}

TEST_CASE_TEMPLATE("NLOHMANN_DEFINE_TYPE_* dispatch is unaffected by user macros named EMPTY or MEMBERS", Json, // NOLINT(readability-math-missing-parentheses, bugprone-throwing-static-initialization)
                   nlohmann::json, nlohmann::ordered_json)
{
    SECTION("zero members")
    {
        const persons::dispatch_with_user_macros_empty obj{};
        const Json j = obj;
        CHECK(j == Json::object());
        CHECK_NOTHROW(j.template get<persons::dispatch_with_user_macros_empty>());
    }

    SECTION("one member")
    {
        persons::dispatch_with_user_macros_members obj{};
        obj.value = 42;
        const Json j = obj;
        CHECK(j == Json({{"value", 42}}));
        CHECK(j.template get<persons::dispatch_with_user_macros_members>().value == 42);
    }

    SECTION("derived with zero own members")
    {
        persons::dispatch_with_user_macros_derived_empty obj{};
        obj.value = 42;
        const Json j = obj;
        CHECK(j == Json({{"value", 42}}));
        CHECK(j.template get<persons::dispatch_with_user_macros_derived_empty>().value == 42);
    }

    SECTION("derived with own members")
    {
        persons::dispatch_with_user_macros_derived_members obj{};
        obj.value = 42;
        obj.own = 7;
        const Json j = obj;
        CHECK(j == Json({{"value", 42}, {"own", 7}}));
        const auto obj2 = j.template get<persons::dispatch_with_user_macros_derived_members>();
        CHECK(obj2.value == 42);
        CHECK(obj2.own == 7);
    }
}