vendor/structopt/examples/at_least_two.rs

   1 //! How to require presence of at least N values,
   2 //! like `val1 val2 ... valN ... valM`.
   3
   4 use structopt::StructOpt;
   5
   6 #[derive(StructOpt, Debug)]
   7 struct Opt {
   8     #[structopt(required = true, min_values = 2)]
   9     foos: Vec<String>,
  10 }
  11
  12 fn main() {
  13     let opt = Opt::from_args();
  14     println!("{:?}", opt);
  15 }