use clap::{app_from_crate, arg, AppSettings}; fn main() { let matches = app_from_crate!() .args_override_self(true) .global_setting(AppSettings::DeriveDisplayOrder) .allow_negative_numbers(true) .arg(arg!(--two )) .arg(arg!(--one )) .get_matches(); println!("two: {:?}", matches.value_of("two").expect("required")); println!("one: {:?}", matches.value_of("one").expect("required")); }