vendor/clap-3.2.20/examples/cargo-example.rs

   1 fn main() {
   2     let cmd = clap::Command::new("cargo")
   3         .bin_name("cargo")
   4         .subcommand_required(true)
   5         .subcommand(
   6             clap::command!("example").arg(
   7                 clap::arg!(--"manifest-path" <PATH>)
   8                     .required(false)
   9                     .value_parser(clap::value_parser!(std::path::PathBuf)),
  10             ),
  11         );
  12     let matches = cmd.get_matches();
  13     let matches = match matches.subcommand() {
  14         Some(("example", matches)) => matches,
  15         _ => unreachable!("clap should ensure we don't get here"),
  16     };
  17     let manifest_path = matches.get_one::<std::path::PathBuf>("manifest-path");
  18     println!("{:?}", manifest_path);
  19 }