What is && in c++

Question

Possible Duplicate:
Double Address Operator? (&&)

I came across the following function signature

void doSomething(double && r3);

It cannot be logical &&, and Reference is a single &... what is the above && ? If possible, can you point me to some documentation on it?

Not a keyword, but a concept. And the && is new to C++11. See the linked question. — Luchian Grigore, Jul 25 '12 at 02:06
Nope its a new addition in C++11, its designed to allow move semantics and such — daniel gratzer, Jul 25 '12 at 02:06

score 1 · Accepted Answer · answered Jul 25 '12 at 02:06

1

It is an rvalue reference. I could tell you that I am an expert on the matter, but this is probably the most confusing aspect of C++ to me. Anyhow, here is a great explanation.

http://thbecker.net/articles/rvalue_references/section_03.html

answered Jul 25 '12 at 02:06

Jonathan Henson

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Here are two articles from Microsoft that helped me understand the difference between lvalue and rvalue. The second shows a good example of how rvalue could be used. http://msdn.microsoft.com/en-us/library/f90831hc.aspx http://msdn.microsoft.com/en-us/library/dd293668.aspx – HeatfanJohn Jul 25 '12 at 02:18

What is && in c++

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