mirror of
https://github.com/clap-rs/clap
synced 2024-09-21 06:41:54 +00:00
bfa02fd418
This ports our example testing over to [trycmd](https://docs.rs/) so we can: - More thoroughly test our examples - Provide always-up-to-date example usage The old way of testing automatically picked up examples. This new way requires we have a `.md` file that uses the example in some way. Notes: - Moved overall example description to the `.md` file - I added cross-linking between related examples - `14_groups` had a redundant paragraph (twice talked about "one and only one"
28 lines
708 B
Rust
28 lines
708 B
Rust
use clap::{App, Arg};
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fn main() {
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let matches = App::new("myapp")
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.about("does awesome things")
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.arg(
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Arg::new("MODE")
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.help("What mode to run the program in")
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.index(1)
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.possible_values(["fast", "slow"])
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.required(true),
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)
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.get_matches();
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// Note, it's safe to call unwrap() because the arg is required
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match matches
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.value_of("MODE")
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.expect("'MODE' is required and parsing will fail if its missing")
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{
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"fast" => {
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println!("Hare");
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}
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"slow" => {
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println!("Tortoise");
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}
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_ => unreachable!(),
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}
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}
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