Closures/Value capture: Difference between revisions

One note here about referencing values and capturing values: <br>

Rust employs strong ownership rules that do not allow mutating a value that is referenced (pointed to without allowing mutation) from elsewhere. It also doesn't allow referencing a value that may be dropped before the reference is released. The proof that we really did capture the value is therefore unnecessary. Either we did or it wouldn't have compiled.

<lang rust>fn main() {

let fs: Vec<_> = (0..10).map(|i| {move || i*i} ).collect();

println!("7th val: {}", fs[7]());

}</lang>

{{out}}

<pre>7th val: 49</pre>