How to Avoid Lifetime Annotations with Owned Types

You avoid lifetime annotations by using owned types like String or Vec<T> instead of references, because ownership transfers the data rather than borrowing it. Replace &str parameters with String to let the function take ownership of the data, eliminating the need to specify how long the reference lives.

fn process_data(data: String) {
    println!("Processing: {}", data);
}

This approach works because String owns its heap-allocated data, so the compiler knows the data lives as long as the variable does without extra lifetime hints.

Owned types mean your function takes full responsibility for the data, like receiving a package you keep forever. Borrowed types (references) are like borrowing a book; you must specify when you'll return it. Using owned types removes the need to track return dates, simplifying your code.