struct AppConfig:
    port: Int
    service_name: String

fn build_message(name: String, port: Int) -> String:
    if port > 0 && port < 65536:
        return name
    else:
        return "invalid"

fn main() -> Int:
    let config = build_message("backend-api", 8080)
    let enabled = true || false
    if enabled:
        return 0
    else:
        return 1