vendor/structopt/examples/basic.rs

   1 //! A somewhat comprehensive example of a typical `StructOpt` usage.use
   2
   3 use std::path::PathBuf;
   4 use structopt::StructOpt;
   5
   6 /// A basic example
   7 #[derive(StructOpt, Debug)]
   8 #[structopt(name = "basic")]
   9 struct Opt {
  10     // A flag, true if used in the command line. Note doc comment will
  11     // be used for the help message of the flag. The name of the
  12     // argument will be, by default, based on the name of the field.
  13     /// Activate debug mode
  14     #[structopt(short, long)]
  15     debug: bool,
  16
  17     // The number of occurrences of the `v/verbose` flag
  18     /// Verbose mode (-v, -vv, -vvv, etc.)
  19     #[structopt(short, long, parse(from_occurrences))]
  20     verbose: u8,
  21
  22     /// Set speed
  23     #[structopt(short, long, default_value = "42")]
  24     speed: f64,
  25
  26     /// Output file
  27     #[structopt(short, long, parse(from_os_str))]
  28     output: PathBuf,
  29
  30     // the long option will be translated by default to kebab case,
  31     // i.e. `--nb-cars`.
  32     /// Number of cars
  33     #[structopt(short = "c", long)]
  34     nb_cars: Option<i32>,
  35
  36     /// admin_level to consider
  37     #[structopt(short, long)]
  38     level: Vec<String>,
  39
  40     /// Files to process
  41     #[structopt(name = "FILE", parse(from_os_str))]
  42     files: Vec<PathBuf>,
  43 }
  44
  45 fn main() {
  46     let opt = Opt::from_args();
  47     println!("{:#?}", opt);
  48 }