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https://github.com/clap-rs/clap
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36 lines
No EOL
875 B
Markdown
36 lines
No EOL
875 B
Markdown
# clap-derives
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[](https://travis-ci.org/Hoverbear/clap-derives)
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[](https://ci.appveyor.com/project/Hoverbear/clap-derives)
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Clap custom derives.
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```rust
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#[macro_use]
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extern crate clap;
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#[macro_use]
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extern crate clap_derive;
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use clap::{App, Arg};
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#[derive(ArgEnum, Debug)]
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enum ArgChoice {
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Foo,
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Bar,
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Baz,
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}
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fn main() {
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let matches = App::new(env!("CARGO_PKG_NAME"))
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.arg(Arg::with_name("arg")
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.required(true)
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.takes_value(true)
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.possible_values(&ArgChoice::variants())
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).get_matches();
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let t = value_t!(matches.value_of("arg"), ArgChoice)
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.unwrap_or_else(|e| e.exit());
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println!("{:?}", t);
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}
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``` |