inheritance_meta.cpp

#include <iostream>
#include <meta.h>
#include <json.h>
using json = nlohmann::json;

struct Entity {
    int id;
};

struct Character : Entity {
    std::string name;
};

namespace meta {
    template <>
    inline auto registerMembers<Entity>()
    {

        return members(
            member("id", &Entity::id)
        );
    }

    template <>
    inline auto registerMembers<Character>()
    {
        return std::tuple_cat(
            meta::getMembers<Entity>(), // will get all members from Entity
            members(member("name", &Character::name))
        );
    }
}

int main()
{
    Character c;
    c.id = 42;
    c.name = "Douglas";
    json j = c;
    std::cout << std::setw(4) << j << std::endl;
/* 

output:

{
    "id": 42,
    "name": "Douglas"
}

*/

}