chore(vendor): add anyhow crate

third_party/crates/clap-4.6.7/examples/escaped-positional-derive.rs

@@ -0,0 +1,25 @@
+use clap::Parser;
+
+#[derive(Parser)] // requires `derive` feature
+#[command(version, about, long_about = None)]
+struct Cli {
+    #[arg(short = 'f')]
+    eff: bool,
+
+    #[arg(short = 'p', value_name = "PEAR")]
+    pea: Option<String>,
+
+    #[arg(last = true)]
+    slop: Vec<String>,
+}
+
+fn main() {
+    let args = Cli::parse();
+
+    // This is what will happen with `myprog -f -p=bob -- sloppy slop slop`...
+    println!("-f used: {:?}", args.eff); // -f used: true
+    println!("-p's value: {:?}", args.pea); // -p's value: Some("bob")
+    println!("'slops' values: {:?}", args.slop); // 'slops' values: Some(["sloppy", "slop", "slop"])
+
+    // Continued program logic goes here...
+}