vendor/structopt/tests/ui/option_required.rs

   1 // Copyright 2018 Guillaume Pinot (@TeXitoi) <texitoi@texitoi.eu>
   2 //
   3 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   4 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   5 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   6 // option. This file may not be copied, modified, or distributed
   7 // except according to those terms.
   8
   9 use structopt::StructOpt;
  10
  11 #[derive(StructOpt, Debug)]
  12 #[structopt(name = "basic")]
  13 struct Opt {
  14     #[structopt(short, required = true)]
  15     n: Option<u32>,
  16 }
  17
  18 fn main() {
  19     let opt = Opt::from_args();
  20     println!("{:?}", opt);
  21 }