rust-error

Solution Patterns

Pattern 1: Option for Normal Absence

// Lookup operations where "not found" is normal
fn find_user(id: u32) -> Option<User> {
    users.get(&id)
}

// Usage patterns
match find_user(123) {
    Some(user) => println!("Found: {}", user.name),
    None => println!("User not found"),
}

// Or convert to Result for propagation
let user = find_user(123).ok_or(UserNotFoundError)?;