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use clap::{arg, Args as _, Command, FromArgMatches as _, Parser};
#[derive(Parser, Debug)]
struct DerivedArgs {
#[clap(short, long, action)]
derived: bool,
}
fn main() {
let cli = Command::new("CLI").arg(arg!(-b - -built).action(clap::ArgAction::SetTrue));
let cli = DerivedArgs::augment_args(cli);
let matches = cli.get_matches();
println!(
"Value of built: {:?}",
*matches.get_one::<bool>("built").unwrap()
);
println!(
"Value of derived via ArgMatches: {:?}",
*matches.get_one::<bool>("derived").unwrap()
);
let derived_matches = DerivedArgs::from_arg_matches(&matches)
.map_err(|err| err.exit())
.unwrap();
println!("Value of derived: {:#?}", derived_matches);
}