Can't parse not formatted JSON.

[biggerevil]

Update: The problem was I didn't close file after downloading JSON. You need to close file at first and only then parse with nlohmann.

I'm trying to parse JSON in C++ with nlohmann/json library. But this library can't parse not formatted JSON.
It gives error:
libc++abi.dylib: terminating with uncaught exception of type nlohmann::detail::parse_error: [json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - unexpected end of input; expected '[', '{', or a literal

This JSON gives error:

Update: here was json

But nlohmann works fine with JSON like this:

Update:  here was another json

Is there a way to format JSON from first format to the second one in C++ code? Without using websites. Maybe there's a library for this, or it's achievable with just C++ or STL.

Update: The problem was I didn't close file after downloading JSON. You need to close file at first and only then parse with nlohmann. The same what I wrote in the beginning of this comment. Just in case somebody misses it.

[nlohmann]

The error message

[json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - unexpected end of input; expected '[', '{', or a literal

states that no input could be read. Can you share the code you use to parse the input? It seems as if the file could not be opened correctly.

[biggerevil]

I'm sorry, my bad. I download the needed JSON and the problem is somehow connected with that. Everything works when I try to parse already existing file (which I've downloaded a while ago).

[biggerevil]

If somebody interested - I should've close the file into which I was downloading JSON data. And only after closing I parse with nlohmann.

[rubycho]

@biggerevil
Thanks. I had a similar problem; when downloading json data with CURL and parse it using the same file pointer, caused the error.
Closing and reopening with fopen solved the issue.