Expected type `bool`, found type `&bool`

Question

I would like to take a bool from a Vec and compare it in an if statement. How do I solve the following error?

Answer 1

take a bool from a Vec

Just do that:

let foo = vec![true];
if foo[0] { /* ... */ }

bool implements Copy, so indexing the array will copy the value out.

If you had a reference to the boolean inside the vector, you will need to dereference it:

let foo = vec![true];
if let Some(val) = foo.last() {
    if *val { /* ... */ }
}

Or

let foo = vec![true];
if let Some(&val) = foo.last() {
    if val { /* ... */ }
}