1 files changed, 22 insertions, 0 deletions
diff --git a/third_party/rust/clap/examples/cargo-example-derive.rs b/third_party/rust/clap/examples/cargo-example-derive.rs
new file mode 100644
index 0000000000..1ee0a02551
--- /dev/null
+++ b/third_party/rust/clap/examples/cargo-example-derive.rs
@@ -0,0 +1,22 @@
+// Note: this requires the `derive` feature
+
+use clap::Parser;
+
+#[derive(Parser)]
+#[clap(name = "cargo")]
+#[clap(bin_name = "cargo")]
+enum Cargo {
+    ExampleDerive(ExampleDerive),
+}
+
+#[derive(clap::Args)]
+#[clap(author, version, about, long_about = None)]
+struct ExampleDerive {
+    #[clap(long, parse(from_os_str))]
+    manifest_path: Option<std::path::PathBuf>,
+}
+
+fn main() {
+    let Cargo::ExampleDerive(args) = Cargo::parse();
+    println!("{:?}", args.manifest_path);
+}