Rvalue references

Lecture 2 - Slide 19 : 29

Rvalue references

An rvalue reference is a reference to a temporary object (soon to disappear) from which we may be tempted to steal some constituents in order to avoid an expensive copy operation

Lvalue references
Rvalues

The C++ Prog. Lang. (4. edition): Page 193

Rvalue references
- Binds to an rvalue, such as the returned value of many functions
- Used for "destructive read" that would otherwise have required a copy (Stroustrup citation)
- We want to overload some functions on Rvalue references in order to avoid expensive copy operations
- Intimately connected to move constructors

Illustration of Rvalue references - in contrast to other kinds of references.

The compilable parts of the program from above.

Rvalues and move constructors