// Copyright 2018 Guillaume Pinot (@TeXitoi) // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. use clap::Clap; #[derive(Clap, Debug)] #[clap(name = "basic")] struct Opt { #[clap(default_value_t = -10)] value: u32, } fn main() { let opt = Opt::parse(); println!("{:?}", opt); }