How can return json string when value contains quotation mark (")

Question

Imagine that I have this json:

{
  "a":"b"
}

If I have a function in C++ that returns this json in string format, such as std::string getjson(), it would return stringified version of this json like:

"{\"a\":\"b\"}"

To be complete:

std::string getjson()
{
    return "{\"a\":\"b\"}";
}

myfavourite_jsonparser.parse(getjson());

This works.

Now imagine that the value of key in json contains a ":

{
  "a":"\"b"
}

How could I return this from std::string getjson() function?

Consider using raw string literals when embedding things in strings. — Qaz
– Qaz, Commented Oct 8, 2020 at 8:04
Or even better use a json library rather than trying to construct it by hand — Alan Birtles
– Alan Birtles, Commented Oct 8, 2020 at 8:28

tenfour · Accepted Answer · 2020-10-08 08:02:33Z

3

Just as you escape a quote with a backslash (\" results in "), a backslash can be used to escape backslashes as well. So \\ results in \.

So if you want to output \", then escape like this: \\\".

answered Oct 8, 2020 at 8:02

tenfour

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