Binding RValue-References in C++11 Lambdas

Asked Mar 15 '19 at 18:43

Active Mar 15 '19 at 18:43

Viewed 29 times

Consider the following code:

std::function<void()> bind_arg(int&& arg) {
    return [arg]() {
        std::cout << arg << std::endl;
    }
}

Does this code bind arg by value or by rvalue reference? (That is, is this safe, or does it bind a dangling reference?)

asked Mar 15 '19 at 18:43

IanPudney

1

Usually it's called "capturing", not "binding". – HolyBlackCat Mar 15 '19 at 18:46
1

Closed as a dupe of the canonical. TL;DR: capturing by name without using `&` captures by value (a copy happens). – NathanOliver Mar 15 '19 at 18:50

0 Answers0