How to discard json.exception.out_of_range.406 and parse the JSON anyway?

[josephernest]

I receive this from several API endpoints:

std::string r = "{\"a\": 2e308}";
nlohmann::json r;
std::istringstream() >> r;

This gives

json.exception.out_of_range.406

(See https://json.nlohmann.me/home/exceptions/#jsonexceptionout_of_range406)

How to parse it anyway and ignore the error? If needed, how can we change it to NaN or Inf?

Is it possible without manually modifying the string?

[nlohmann]

You cannot. This library stores numbers given in scientific notation as double, and 2e308 is out of the range of it. As JSON does not support NaN or Inf, there is also no support in this library.

[josephernest]

Thank you for your answer! Is there a way to have it as null instead, so that the nlohmann::json::parse call doesn't fail?