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Add NLOHMANN_DEFINE_DERIVED_TYPE_* macros (#4033)

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* Add NLOHMANN_DEFINE_DERIVED_TYPE_* macros

* Fix with amalgamate

* Add documentation

* Fix with amalgamate

* Fix with amalgamate

---------

Co-authored-by: Niccolò Iardella <niccolo.iardella@doriansrl.it>
This commit is contained in:
Niccolò Iardella
2024-11-08 21:41:19 +01:00
committed by GitHub
parent ac8b22180d
commit aff5a31d35
5 changed files with 356 additions and 43 deletions
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185
tests/src/unit-udt_macro.cpp
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@ -38,6 +38,26 @@ class person_with_private_data
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:
@ -74,6 +94,31 @@ class person_with_private_data_2
NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT(person_with_private_data_2, age, name, 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 person_without_private_data_1
{
public:
@ -96,6 +141,26 @@ class person_without_private_data_1
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:
@ -118,6 +183,26 @@ class person_without_private_data_2
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_))
{}
};
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:
@ -153,6 +238,31 @@ class person_without_private_data_3
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;
}
};
NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_DEFAULT(derived_person_without_private_data_3, person_without_private_data_3, hair_color)
class person_with_private_alphabet
{
public:
@ -216,6 +326,19 @@ class person_with_private_alphabet
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 derived_person_with_private_alphabet : public person_with_private_alphabet
{
public:
bool operator==(const derived_person_with_private_alphabet& other) const
{
return person_with_private_alphabet::operator==(other) && schwa == other.schwa;
}
private:
int schwa = 0;
NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE(derived_person_with_private_alphabet, person_with_private_alphabet, schwa)
};
class person_with_public_alphabet
{
public:
@ -345,6 +468,32 @@ TEST_CASE_TEMPLATE("Serialization/deserialization via NLOHMANN_DEFINE_TYPE_INTRU
}
}
TEST_CASE_TEMPLATE("Serialization/deserialization via NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE and NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE", T,
persons::derived_person_with_private_data,
persons::derived_person_without_private_data_1,
persons::derived_person_without_private_data_2)
{
SECTION("person")
{
// serialization
T p1("Erik", 1, {{"haircuts", 2}}, "red");
CHECK(json(p1).dump() == "{\"age\":1,\"hair_color\":\"red\",\"metadata\":{\"haircuts\":2},\"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("age");
CHECK_THROWS_WITH_AS(j.get<T>(), "[json.exception.out_of_range.403] key '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", T,
persons::person_with_private_data_2,
persons::person_without_private_data_3)
@ -379,6 +528,42 @@ TEST_CASE_TEMPLATE("Serialization/deserialization via NLOHMANN_DEFINE_TYPE_INTRU
}
}
TEST_CASE_TEMPLATE("Serialization/deserialization via NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_DEFAULT and NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_DEFAULT", T,
persons::derived_person_with_private_data_2,
persons::derived_person_without_private_data_3)
{
SECTION("derived person with default values")
{
// serialization of default constructed object
T p0;
CHECK(json(p0).dump() == "{\"age\":0,\"hair_color\":\"blue\",\"metadata\":null,\"name\":\"\"}");
// serialization
T p1("Erik", 1, {{"haircuts", 2}}, "red");
CHECK(json(p1).dump() == "{\"age\":1,\"hair_color\":\"red\",\"metadata\":{\"haircuts\":2},\"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("name");
j.erase("age");
j.erase("metadata");
j.erase("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", T,
persons::person_with_private_alphabet,
persons::person_with_public_alphabet)