These helper functions make it convenient to avoid making an unnecessary
copy of the string before converting it to a QByteArray. The current
most obvious way to do this would be:
// QStringRef text
QByteArray latin1 = text.toString().toLatin1();
Though the copy can also be avoided by doing:
const QString textData =
QString::fromRawData(text.unicode(), text.size());
QByteArray latin1 = textData.toLatin1();
Now the faster method can be achieved using the new obvious way:
QByteArray latin1 = text.toLatin1();
Reviewed-by: Thiago Macieira
Reviewed-by: Robin Burchell
(cherry picked from commit feabda665de62a0f6a82d831b45926697f30b45b)
e8ac3549c5