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The Ultimate Guide to Rust Programming

Moving Strings

Explore how Rust manages ownership with Strings by examining what happens when a String is moved between functions. Understand why using a moved value results in errors and learn about alternatives like cloning, including their trade-offs in performance.

We'll cover the following...

Does this program compile?

Rust 1.40.0
fn greet(name: String) {
    println!("Hello {}", name);
}
fn main() {
    let first_name = "Michael";
    let last_name = " Snoyman";
    let full_name: String = first_name.to_owned() + last_name;
    greet(full_name);
}

Sure, no problem! We construct a new String value, store it in the full_name variable, and then move it into the greet function. But what happens if we ...