Exploring C++ 11, Second Edition

EXPLORATION 60

Moving Data with Rvalue References

In Exploration 39, I introduced std::move() without explaining what it really does or how it works. Somehow it moves data, such as a string, from one variable to another, instead of copying the string contents, but you must be wondering how it works its wonders. The function itself is surprisingly simple. The concepts that underlie that simple implementation are more complicated, which is why I have waited until now to introduce the complexities and subtleties involved.

Temporary Objects

Historically, temporary objects could be the source of much unnecessary copying of data. For example, suppose ...