-use clap::{arg, command};
+// Note: this requires the `cargo` feature
+
+use clap::{arg, command, value_parser};
fn main() {
let matches = cmd().get_matches();
// Note, it's safe to call unwrap() because the arg is required
- let port: usize = matches
- .value_of_t("PORT")
+ let port: usize = *matches
+ .get_one::<usize>("PORT")
.expect("'PORT' is required and parsing will fail if its missing");
println!("PORT = {}", port);
}
command!().arg(
arg!(<PORT>)
.help("Network port to use")
- .validator(|s| s.parse::<usize>()),
+ .value_parser(value_parser!(usize)),
)
}