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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /vendor/clap/examples/tutorial_builder/04_01_possible.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/clap/examples/tutorial_builder/04_01_possible.rs')
-rw-r--r-- | vendor/clap/examples/tutorial_builder/04_01_possible.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/vendor/clap/examples/tutorial_builder/04_01_possible.rs b/vendor/clap/examples/tutorial_builder/04_01_possible.rs new file mode 100644 index 000000000..f7b0cfb34 --- /dev/null +++ b/vendor/clap/examples/tutorial_builder/04_01_possible.rs @@ -0,0 +1,28 @@ +// Note: this requires the `cargo` feature + +use clap::{arg, command}; + +fn main() { + let matches = command!() + .arg( + arg!(<MODE>) + .help("What mode to run the program in") + .value_parser(["fast", "slow"]), + ) + .get_matches(); + + // Note, it's safe to call unwrap() because the arg is required + match matches + .get_one::<String>("MODE") + .expect("'MODE' is required and parsing will fail if its missing") + .as_str() + { + "fast" => { + println!("Hare"); + } + "slow" => { + println!("Tortoise"); + } + _ => unreachable!(), + } +} |