How to encode json with order key likes Ojson ?

[sarahlydia9868]

Hello, I have a trouble when encode_json, I want the object keys to be sorted in the same original order likes ojson.
Example

struct SexyAnimation {
        String version;
        u8 frame_rate;
        AnimationPosition position;
        AnimationSize size;
        explicit SexyAnimation() = default;

        ~SexyAnimation(

            ) = default;
 };

JSONCONS_ALL_MEMBER_TRAITS(SexyAnimation, version, frame_rate, position, size);

Output:

{
        "frame_rate": 10,
        "position": {
                "x": 0.0,
                "y": 0.0
        },
        "size": {
                "height": 0.0,
                "width": 0.0
        },
        "version": "Hello"
}

I want output like this:

{
        "version": "Hello",
        "frame_rate": 10,
        "position": {
                "x": 0.0,
                "y": 0.0
        },
        "size": {
                "height": 0.0,
                "width": 0.0
        }
}

Thanks.

[sarahlydia9868]

Nevermind, i found the solution.

[danielaparker]

@hiepsahplydia, could I ask what is your solution :-)

The best I could do is by using the internal implementation class jsoncons::encode_traits,

#include <jsoncons/json.hpp>
#include <iostream>

struct SexyAnimation {
    std::string version;
    uint8_t frame_rate = 10;
    int position = 0;
    int size = 0;
    explicit SexyAnimation() = default;
    ~SexyAnimation() = default;
};

JSONCONS_ALL_MEMBER_TRAITS(SexyAnimation, version, frame_rate, position, size);

int main()
{
    std::error_code ec;

    SexyAnimation val;

    std::string buffer;
    jsoncons::json_string_encoder encoder{buffer};
    jsoncons::encode_traits<SexyAnimation, char>::encode(val, encoder, jsoncons::ojson{}, ec);
    std::cout << buffer << "\n";
}

Output:

{
    "version": "",
    "frame_rate": 10,
    "position": 0,
    "size": 0
}

I agree that the encode_traits function should produce results in original order, which it currently doesn't.

[sarahlydia9868]

I use encode_json<ojson> because it seems working fine :-)