Rvalue Bindings

An rvalue reference can bind to a temporary expression so the program can name that temporary result.

rvalue_bindings.cpp

#include <iostream>

int main() {
    int base = ;

    int&& temporary = base * 2;
    int total = temporary + 1;

    std::cout << "temporary=" << temporary << std::endl;
    std::cout << "total=" << total << std::endl;
    return 0;
}

#include <iostream>

int main() {
    int base = ;

    int&& temporary = base * 2;
    int total = temporary + 1;

    std::cout << "temporary=" << temporary << std::endl;
    std::cout << "total=" << total << std::endl;
    return 0;
}

#include <iostream>

int main() {
    int base = ;

    int&& temporary = base * 2;
    int total = temporary + 1;

    std::cout << "temporary=" << temporary << std::endl;
    std::cout << "total=" << total << std::endl;
    return 0;
}

rvalue reference An rvalue reference uses `&&` and can bind to a temporary value.

temporary expression Expressions such as arithmetic results do not have stable names until they are bound or stored.