Could you give an example of a nested JSON source and how you would expect it to be mapped to CSV?

Thank you for your reply!

Suppose, we have this source (testjson_nested.json):

[
    {
        "text": "Chicago Reader", 
        "float": 1.0, 
        "datetime": "1971-01-01T04:14:00", 
        "boolean": true,
        "nested": {
          "time": "04:14:00",
          "nested": {
            "date": "1971-01-01",
            "integer": 40
          }
        }
    }, 
    {
        "text": "Chicago Sun-Times", 
        "float": 1.27, 
        "datetime": "1948-01-01T14:57:13", 
        "boolean": true,
        "nested": {
          "time": "14:57:13",
          "nested": {
            "date": "1948-01-01",
            "integer": 63
          }
        }
    }
]

And here is how Python csvkit's utility in2csv does this conversion:

(base) C:\Users\Wiluite50>in2csv testjson_nested.json
text,float,datetime,boolean,nested/time,nested/nested/date,nested/nested/integer
Chicago Reader,1.0,1971-01-01T04:14:00,True,4:14:00,1971-01-01,40
Chicago Sun-Times,1.27,1948-01-01T14:57:13,True,14:57:13,1948-01-01,63

I've even seen a C++ code that did it as well (except for saving field ordering, what is very important to be).
But, the jsoncons seems to be perfectly designed and quick, and it would be nice to have the same thing within it.

Thanks.

Thanks for the suggestion. We don't currently support that, but we'll take it as a feature request for a future version.