Converting C++ class to JSON

Question

I\'d like to create a JSON string containing the instance variables of my class.

For example,

class Example {  
    std::string string;  
    std::ma         


        

Answer 1

Any good C++ JSON library should do this and it is sad to see that they don't -- with the exception of ThorsSerializer and apparently Nosjob as mentioned in this question.

Of course, C++ does not have reflection like Java, so you have to explicitly annotate your types:
(copied from the ThorsSerializer documentation)

#include "ThorSerialize/JsonThor.h"
#include "ThorSerialize/SerUtil.h"
#include 

Example Usage:

int main()
{
    using ThorsAnvil::Serialize::jsonExport;
    using ThorsAnvil::Serialize::jsonImport;


    Example     e1 {"Some Text", {{"ace", "the best"}, {"king", "second best"}}, {1 ,2 ,3, 4}};

    // Simply serialize object to json using a stream.
    std::cout << jsonExport(e1) << "\n";

    // Deserialize json text from a stream into object.
    std::cin  >> jsonImport(e1);
}

Running:

{
    "string": "Some Text",
    "map":
    {
        "ace": "the best",
        "king": "second best"
    },
    "vector": [ 1, 2, 3, 4]
}

You cannot do better than this in C++.