clap/examples/tutorial_builder/03_02_option.rs

// Note: this requires the `cargo` feature

use clap::{arg, command};

fn main() {
    let matches = command!()
        .arg(arg!(-n --name <NAME>).required(false))
        .get_matches();

    println!(
        "name: {:?}",
        matches
            .get_one::<String>("name")
            .expect("matches definition")
    );
}
docs: Annotate more places with required features 2022-03-03 18:32:29 +00:00			// Note: this requires the `cargo` feature

docs: Update to new `command!` macro 2022-02-15 14:33:38 +00:00			`use clap::{arg, command};`
docs: Re-work examples This creates distinct tutorial examples from complex feature examples (more how-tos). Both sets are getting builder / derive versions (at least the critical ones). 2021-11-30 18:30:19 +00:00
			`fn main() {`
docs: Update to new `command!` macro 2022-02-15 14:33:38 +00:00			`let matches = command!()`
docs: Re-work examples This creates distinct tutorial examples from complex feature examples (more how-tos). Both sets are getting builder / derive versions (at least the critical ones). 2021-11-30 18:30:19 +00:00			`.arg(arg!(-n --name <NAME>).required(false))`
			`.get_matches();`

docs(example): Update for value_parser 2022-05-23 15:50:11 +00:00			`println!(`
			`"name: {:?}",`
			`matches`
			`.get_one::<String>("name")`
			`.expect("matches definition")`
			`);`
docs: Re-work examples This creates distinct tutorial examples from complex feature examples (more how-tos). Both sets are getting builder / derive versions (at least the critical ones). 2021-11-30 18:30:19 +00:00			`}`