Error Handling

# Coming soon
fn divide(a: f64, b: f64) -> Result<f64, str> {
  if b == 0.0 {
    return Err("Division by zero")
  }
  return Ok(a / b)
}

# Handle result
match divide(10.0, 2.0) {
  Ok(result) => print("Result:", result),
  Err(error) => print("Error:", error)
}

# Coming soon
fn process_file(path: str) -> Result<str, Error> {
  let file = File.open(path)?  # ? operator propagates errors
  defer file.close()
  return Ok(file.read_all())
}

# Coming soon
fn find_user(id: i32) -> Option<User> {
  # May or may not find user
  if user_exists(id) {
    return Some(get_user(id))
  }
  return None
}

match find_user(123) {
  Some(user) => print("Found:", user.name),
  None => print("User not found")
}

# Coming soon
fn read_config() -> Result<Config, Error> {
  let file = File.open("config.json")?  # Propagates error
  let content = file.read_all()?
  return Ok(json.parse(content)?)
}

fn safe_read_file(path: str) -> Result<str, Error> {
  let file = File.open(path)?
  defer file.close()
  return Ok(file.read_all())
}

match safe_read_file("data.txt") {
  Ok(content) => print("Content:", content),
  Err(e) => print("Error reading file:", e)
}