Double quotes in QString

cpper

The standard way of displaying double quotes in a std::string is by doing string str("\""); . However I see this doesn't work with QStrings:

    QString str("a\"bc\"");
    qDebug()<<str;
    qDebug()<<"a\"bc\"";

The first qDebug prints a\"bc\" , while the second works and prints a"bc" . Any ideas ?

VRonin

it's not QString, it's qDebug() see https://bugreports.qt.io/browse/QTBUG-48517 for example with Mr. Knoll himself answering

kshegunov

@cpper Of course it works, this is how C++ does it and has nothing to do with Qt. What you're observing is expected, as qDebug() will escape any non-alphanum characters (including non-printables).

raven-worx

the intention for this behavior was to make it easier to debug what's inside QStrings.
If you want to display the contents you need to do qDebug() << QString(...).toUtf8().constData(), what's actually your second approach.

kshegunov

@raven-worx said in Double quotes in QString:

If you want to display the contents you need to do qDebug() << QString(...).toUtf8().constData()

Or what I usually suggest:

QTextStream out(stdout);
out << str;

cpper

All clear now. Thanks guys :)

Chris Kawa

Yet another option, cause you can never have too much ;) :

qDebug().noquote() << str;