How is newline implemented in qDebug()?

Question

Qt

Greetings!
In Qt, there is
qDebug()<<a<<b<<c;
with the help of which the stream is output to the console / where it is indicated.

And so, interests, thanks to what there is a transfer to the following line?
That is, how is the definition implemented that nothing more will be added to the stream (the last<<) and you can display all the content?
I tried to understand in the source codes, but I did not understand what kind of trick it was.

Answer 1

I don't think a big answer is needed. I will describe approximately.
The qDebug macro returns a temporary QDebug object into which any data is written. After ";'" it is destroyed as a temporary object. And in the destructor, it simply calls the "qt_message_output" function, which writes somewhere, not the point, and passes all the accumulated parameters to it. And it is this function that adds newline to the output.