What is QString::QString(QString &&other) used for?

Asked Sep 30 '20 at 16:04

Active Sep 30 '20 at 16:29

Viewed 66 times

I realized there exists another constructor besides normal QString::QString(QString &other). What is it used for? I cannot understand the type QString &&. Does it mean the reference to a reference variable? But the following code could not compile:

QString s1("abc");
QString &s3=s1;
QString &&s4=s3;

It complains "You cannot bind an lvalue to an rvalue reference"

edited Sep 30 '20 at 16:09

scopchanov

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asked Sep 30 '20 at 16:04

William

it declares a rvalue reference https://stackoverflow.com/questions/5481539/what-does-t-double-ampersand-mean-in-c11 – ΦXocę 웃 Пepeúpa ツ Sep 30 '20 at 16:09
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Its a move constructor I belive. – Eraklon Sep 30 '20 at 16:11
[this video](https://www.youtube.com/watch?v=ehMg6zvXuMY&ab_channel=TheCherno) explains it very well – George Oct 01 '20 at 09:22

What is QString::QString(QString &&other) used for?

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