structopt 0.1.1

Parse command line argument by defining a struct.
Documentation 
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// Copyright (c) 2017 Guillaume Pinot <texitoi(a)texitoi.eu>
//
// This work is free. You can redistribute it and/or modify it under
// the terms of the Do What The Fuck You Want To Public License,
// Version 2, as published by Sam Hocevar. See the COPYING file for
// more details.

extern crate structopt;
#[macro_use]
extern crate structopt_derive;

use structopt::StructOpt;

/// A basic example
#[derive(StructOpt, Debug)]
#[structopt(name = "basic")]
struct Opt {
    /// Activate debug mode
    #[structopt(short = "d", long = "debug")]
    debug: bool,

    /// Verbose mode
    #[structopt(short = "v", long = "verbose")]
    verbose: u64,

    /// Set speed
    #[structopt(short = "s", long = "speed", default_value = "42")]
    speed: f64,

    /// Output file
    #[structopt(short = "o", long = "output")]
    output: String,

    /// Number of car
    #[structopt(short = "c", long = "car")]
    car: Option<i32>,

    /// admin_level to consider
    #[structopt(short = "l", long = "level")]
    level: Vec<String>,

    /// Files to process
    #[structopt(name = "FILE")]
    files: Vec<String>,
}

fn main() {
    let opt = Opt::from_args();
    println!("{:?}", opt);
}