Understanding Rust Error E0695

Introduction to Rust Error E0695

Rust error E0695 occurs when a break statement without a label is found inside a labeled block. A label is needed to specify which loop or block the break statement should apply to.

Erroneous code example:

#![allow(unused)]
fn main() {
loop {
    'a: {
        break;
    }
}
}

Correcting the error by labeling the break statement:

To fix this error, the break statement needs to be labeled. The label should match the label of the loop or block you intend to break out of.

Correct code example:

#![allow(unused)]
fn main() {
'l: loop {
    'a: {
        break 'l;
    }
}
}

Alternative way of breaking the labeled block:

If you want to break the labeled block instead of the loop, use the following code:

Alternative code example:

#![allow(unused)]
fn main() {
loop {
    'a: {
        break 'a;
    }
    break;
}
}

Conclusion

Rust error E0695 can be resolved by using labels for break statements inside labeled blocks. By specifying the correct label for the break statement, you can ensure that the break statement applies to the intended loop or block.