Converting json::value to int

[JiazhengSun]

So my json looks like this:
{ "22" : { "multi" : 2, func : [{type: "A", "number" : [1,2,3]}] } }

I want to get the value of "multi", which is 2. The code I have now looks like this:
for (auto& el : j.items()) { auto mul = el.value()["multi"]; }
It says that what I am getting is json::value type. I am wondering how to access it as an integer, as that's what I put in the json? Thanks.

[JiazhengSun]

OK I think I solved it (maybe)? I make the value of "22" as another json (tmp), and access that 2 with tmp["multi"]. I am not sure if this is the best solution. If there is a better one please enlighten me. If not you may feel free to close the issue. Awesome lib! :)

[nickaein]

With auto x = tmp["multi"] you still get a json::value type for x, right? A workaround is to pin down the type, e.g. int x = tmp["multi"];. This triggers an implicit type conversion which is NOT recommended.

Instead, you should use APIs like basic_json::get().

Here is a live example for retrieving multi: https://wandbox.org/permlink/C5J5tsyXmFratpJx

Also, double quotations are required around func and type fields in JSON, otherwise it is not valid.

[nlohmann]

@JiazhengSun Do you need further assistance?