overload QTextStream::operator<<

DungeonLords

I want to overload operator <<. How I can do it? I found similar topic, but my code produce error

#include <QTextStream>

QTextStream &operator<<(QTextStream& out, const QString& string)
{
    return out << string << ";";
}

MainClass::MainClass(QObject *parent)
    : QObject(parent)
{
    QString str;
    QTextStream s(&str);
    QString p("text");
    s<< p;
    qDebug() << str;
}

error: ambiguous overload for ‘operator<<’ (operand types are ‘QTextStream’ and ‘const QString’)

Christian Ehrlicher

@DungeonLords said in overload QTextStream::operator<<:

QTextStream &operator<<(QTextStream& out, const QString& string)

This function already exists, you can't overload it again.

Pl45m4

@DungeonLords to add to @Christian-Ehrlicher :
...and because it's not virtual, you can't override this operator outside of the QTextStream class.

What you can do:
Subclass it and make your own stream class based on QTextStream. There you can define your own << operator