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clap/clap_derive/examples/arg_enum.rs

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//! Usage example of `arg_enum`
//!
//! All the variants of the enum and the enum itself support `rename_all`
use clap::{ArgEnum, Clap};
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#[derive(ArgEnum, Debug, PartialEq)]
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enum ArgChoice {
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/// Descriptions are supported as doc-comment
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Foo,
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// Renames are supported
#[clap(name = "b-a-r")]
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Bar,
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// Aliases are supported
#[clap(alias = "b", alias = "z")]
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Baz,
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// Hiding variants from help and completion is supported
#[clap(hidden)]
Hidden,
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}
#[derive(Clap, PartialEq, Debug)]
struct Opt {
#[clap(arg_enum)]
arg: ArgChoice,
}
fn main() {
let opt = Opt::parse();
println!("{:#?}", opt);
}