1 files changed, 46 insertions, 0 deletions
diff --git a/vendor/clap/examples/typed-derive.rs b/vendor/clap/examples/typed-derive.rs
new file mode 100644
index 000000000..85c750f9c
--- /dev/null
+++ b/vendor/clap/examples/typed-derive.rs
@@ -0,0 +1,46 @@
+// Note: this requires the `derive` feature
+
+use clap::Parser;
+use std::error::Error;
+
+#[derive(Parser, Debug)]
+struct Args {
+    /// Implicitly using `std::str::FromStr`
+    #[clap(short = 'O', value_parser)]
+    optimization: Option<usize>,
+
+    /// Allow invalid UTF-8 paths
+    #[clap(short = 'I', value_parser, value_name = "DIR", value_hint = clap::ValueHint::DirPath)]
+    include: Option<std::path::PathBuf>,
+
+    /// Handle IP addresses
+    #[clap(long, value_parser)]
+    bind: Option<std::net::IpAddr>,
+
+    /// Allow human-readable durations
+    #[clap(long, value_parser)]
+    sleep: Option<humantime::Duration>,
+
+    /// Hand-written parser for tuples
+    #[clap(short = 'D', value_parser = parse_key_val::<String, i32>)]
+    defines: Vec<(String, i32)>,
+}
+
+/// Parse a single key-value pair
+fn parse_key_val<T, U>(s: &str) -> Result<(T, U), Box<dyn Error + Send + Sync + 'static>>
+where
+    T: std::str::FromStr,
+    T::Err: Error + Send + Sync + 'static,
+    U: std::str::FromStr,
+    U::Err: Error + Send + Sync + 'static,
+{
+    let pos = s
+        .find('=')
+        .ok_or_else(|| format!("invalid KEY=value: no `=` found in `{}`", s))?;
+    Ok((s[..pos].parse()?, s[pos + 1..].parse()?))
+}
+
+fn main() {
+    let args = Args::parse();
+    println!("{:?}", args);
+}