vendor/clap/examples/tutorial_derive/03_02_option.rs

   1 use clap::Parser;
   2
   3 #[derive(Parser)]
   4 #[command(author, version, about, long_about = None)]
   5 struct Cli {
   6     #[arg(short, long)]
   7     name: Option<String>,
   8 }
   9
  10 fn main() {
  11     let cli = Cli::parse();
  12
  13     println!("name: {:?}", cli.name.as_deref());
  14 }