mirror of
https://github.com/clap-rs/clap
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38 lines
1.2 KiB
Rust
38 lines
1.2 KiB
Rust
// Copyright 2018 Guillaume Pinot (@TeXitoi) <texitoi@texitoi.eu>
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#[macro_use]
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extern crate structopt;
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use structopt::StructOpt;
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#[derive(StructOpt, Debug)]
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#[structopt(name = "example", about = "An example of StructOpt usage.")]
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struct Opt {
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/// A flag, true if used in the command line.
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#[structopt(short = "d", long = "debug", help = "Activate debug mode")]
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debug: bool,
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/// An argument of type float, with a default value.
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#[structopt(short = "s", long = "speed", help = "Set speed", default_value = "42")]
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speed: f64,
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/// Needed parameter, the first on the command line.
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#[structopt(help = "Input file")]
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input: String,
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/// An optional parameter, will be `None` if not present on the
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/// command line.
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#[structopt(help = "Output file, stdout if not present")]
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output: Option<String>,
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}
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fn main() {
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let opt = Opt::from_args();
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println!("{:?}", opt);
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}
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