Rvalue references were introduced as part of {cpp}11. They are thus a new feature of the language, and are not yet widely understood. Using them is complicated, and code using rvalue references may be difficult to understand. 


== Noncompliant Code Example

----
std::vector<int> return_vector(void)
{
    std::vector<int> tmp {1,2,3,4,5};
    return tmp;
}

std::vector<int> &&rval_ref = return_vector(); // Noncompliant
----


== Compliant Solution

----
std::vector<int> return_vector(void)
{
    std::vector<int> tmp {1,2,3,4,5};
    return tmp;
}

const std::vector<int>& rval_ref = return_vector();
----

