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This post is auto-generated from RSS feed The Rust Programming Language Forum - Latest topics. Source: Help understanding the borrow checker

Hello all

Sorry if this question is not for this category, please let me know if that's the case.
Need some help understanding the borrow checker while I learn rust.
Why this works without any issues?

fn main() {
let mut s = String::from("Hello");

let r1 = &mut s;
change_string(r1);
let r2 = &mut s;
change_string(r2);

println!("{}", s);

}

fn change_string(some_string: &mut String) {
some_string.push_str(" gordy!!!");
}

And this one, by the contrary, does not compile?

let r1 = &mut s;
let r2 = &mut s;    
change_string(r1);
change_string(r2);

println!("{}", s);

}

Is r1 "consumed" somehow or "ignored" in the first case?

Many thanks in advance.
Regards

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