Rvalue reference
An rvalue reference is a C++ reference type, written with &&, that binds to rvalues, including temporary objects, and supports moving resources from them.
100 C++ Mistakes and How to Avoid Them
An rvalue reference is a C++ reference type that can bind to temporary or otherwise movable expressions and enable resource transfer.
- How it is used
- Uses rvalue references to transfer resources efficiently and reduce unnecessary copying in modern C++ object handling.
- How deep it goes
- Defines &&, rvalues, move constructors, and source invalidation through contrasting Page implementations, without broader language internals.
- Examples
- Uses Page and TextSection examples to contrast expensive copying with pointer transfer through Page(Page&&) and std::move.
- What you can do after
- Apply it via move constructors and move assignment operators to transfer resources while invalidating moved-from objects.
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Learn C++ by Example
An rvalue reference is a C++ reference type, written with &&, that can bind to an rvalue.
- How it is used
- Avoids unnecessary copies when inserting temporary objects into vectors.
- How deep it goes
- Explains lvalues, rvalues, overloads, and move construction, while deferring complete value-category details.
- Examples
- Uses temporary vectors, get_next_row, triangle generation, push_back overloads, and emplace_back.
- What you can do after
- Apply it via vector insertion and move construction to avoid copying temporary vectors.
Related concepts
- push_backused by · push_back is an operation that appends an element to the end of a sequence container or returns a sequence containing the appended element.
- temporary objectuses · A temporary object is an unnamed object created for an intermediate expression or initialization whose lifetime is limited by language rules.
- referencekind of · A reference is an indirect value or relationship that identifies or provides access to another value, object, resource, or source.
- rvalueconfigures · An rvalue is an expression that does not designate an assignable object and provides a value or temporary object for use in computation.
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