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!(),
+    }
+}