how to get the json object again from which printed by the method of dump()

[CoderOverflow]

string wormhole;
wormhole = jsonPayload.dump();

How can I convert std::string to json object again?
When I use 'auto x = json::parse(wormhole.c_str()) ', the exception was occurred.

[nlohmann]

You don't need the .c_str(). Which exception did occur?

[CoderOverflow]

I found that the when there are some Chinese characters in json data, the parse function can't work.

[nlohmann]

We extensively tested the parse function with all kinds of UTF-8 characters, so it should work. Could you please provide an example where parsing fails?

[CoderOverflow]

from dump string
["1","2017-10-18 17:38:41.000322","i","20160506","","晋A12345"] NG
["1","2017-10-18 17:37:12.000321","i","20160506","","a"] OK

[nlohmann]

Which exception do you get?

[CoderOverflow]

I used "std::list c_list" to combine the string fields and used json ss(c_list) to create the ss json object, then run dump() method. as you can see the above results.
finally, I created a new json object using parse() to convert the dump string.

[nlohmann]

Which exception do you get? The exception gives hint where the parse error occurs.

[CoderOverflow]

what kind of exception you want to catch？ it just jump into the catch(...) block..

[nlohmann]

Just surround the parse call with try/catch(std::exception &e) and give me the result of e.what().

[CoderOverflow]

parse error - unexpected '"'

[nlohmann]

This is really strange. Could you please try without the .c_str()? Do you use the most recent version from the develop branch?

[CoderOverflow]

c_list.push_back(W2A(strId));
								c_list.push_back(W2A(strDataTime));
								c_list.push_back("i");
								c_list.push_back(W2A(strRQ));
								c_list.push_back(W2A(strDDID));
								//c_list.push_back("a");
								c_list.push_back(W2A(strHP));
								json ss(c_list);
								std::string err = ss.dump();
								json xx = json::parse(err);

Actually, I didn't use c_str().

[nlohmann]

What does W2A do?

[CoderOverflow]

how to check the version? I get the json.hpp at version 2.1.1 on 06/18/2017
W2A/A2W is the morco that will convert the between multiByte and wideChar
I use it to convert the CString of mfc to std::sting

[nlohmann]

Could you try this file: https://github.com/nlohmann/json/blob/develop/src/json.hpp

Is the resulting string UTF-8 encoded?

[CoderOverflow]

I am not sure, maybe is not encoded by UTF-8. I will check this after.

[nlohmann]

Assuming strHP is the string that results in the failure, could you please try

std::string s = "\"";
s += W2A(strHP);
s += "\"";
json::parse(s);

[CoderOverflow]

It does the UTF-8 encoding cause this problem:)
I guess my the encoding of my environment in vs2015 is gbk.
After I added a coversion function converting string from gbk to utf-8, the exception was gone.

THX ^_^

[nlohmann]

Thanks for checking back!