clap/examples/tutorial_builder/02_crate.rs

// Note: this requires the `cargo` feature

use clap::{arg, command};

fn main() {
    let matches = command!()
        .arg(arg!(--two <VALUE>))
        .arg(arg!(--one <VALUE>))
        .get_matches();

    println!(
        "two: {:?}",
        matches
            .get_one::<String>("two")
            .expect("matches definition")
            .expect("required")
    );
    println!(
        "one: {:?}",
        matches
            .get_one::<String>("one")
            .expect("matches definition")
            .expect("required")
    );
}