JSONCPP Writing to files

Question

JSONCPP has a writer, but all it seems to do is get info from the parser and then output it into a string or a stream. How do I make it alter or create new objects, arrays,

Answer 1

Json::StyledWriter is deprecated, you can use Json::StreamWriterBuilder to write json into files.

Json::Value rootJsonValue;
rootJsonValue["foo"] = "bar";

Json::StreamWriterBuilder builder;
builder["commentStyle"] = "None";
builder["indentation"] = "   ";

std::unique_ptr writer(builder.newStreamWriter());
std::ofstream outputFileStream("/tmp/test.json");
writer -> write(rootJsonValue, &outputFileStream);

The json will be written into /tmp/test.json.

$ cat /tmp/test.json

{
    "foo" : "bar"
}