From 64d98f8ee037282c35007b64c2649055c56af1db Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:19:03 +0200
Subject: Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 vendor/clap/examples/typed-derive.rs | 102 +++++++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 vendor/clap/examples/typed-derive.rs

(limited to 'vendor/clap/examples/typed-derive.rs')

diff --git a/vendor/clap/examples/typed-derive.rs b/vendor/clap/examples/typed-derive.rs
new file mode 100644
index 000000000..bdf8a5809
--- /dev/null
+++ b/vendor/clap/examples/typed-derive.rs
@@ -0,0 +1,102 @@
+use clap::builder::TypedValueParser as _;
+use clap::Parser;
+use std::error::Error;
+
+#[derive(Parser, Debug)] // requires `derive` feature
+#[command(term_width = 0)] // Just to make testing across clap features easier
+struct Args {
+    /// Implicitly using `std::str::FromStr`
+    #[arg(short = 'O')]
+    optimization: Option<usize>,
+
+    /// Allow invalid UTF-8 paths
+    #[arg(short = 'I', value_name = "DIR", value_hint = clap::ValueHint::DirPath)]
+    include: Option<std::path::PathBuf>,
+
+    /// Handle IP addresses
+    #[arg(long)]
+    bind: Option<std::net::IpAddr>,
+
+    /// Allow human-readable durations
+    #[arg(long)]
+    sleep: Option<humantime::Duration>,
+
+    /// Hand-written parser for tuples
+    #[arg(short = 'D', value_parser = parse_key_val::<String, i32>)]
+    defines: Vec<(String, i32)>,
+
+    /// Support for discrete numbers
+    #[arg(
+        long,
+        default_value_t = 22,
+        value_parser = clap::builder::PossibleValuesParser::new(["22", "80"])
+            .map(|s| s.parse::<usize>().unwrap()),
+    )]
+    port: usize,
+
+    /// Support enums from a foreign crate that don't implement `ValueEnum`
+    #[arg(
+        long,
+        default_value_t = foreign_crate::LogLevel::Info,
+        value_parser = clap::builder::PossibleValuesParser::new(["info", "debug", "info", "warn", "error"])
+            .map(|s| s.parse::<foreign_crate::LogLevel>().unwrap()),
+    )]
+    log_level: foreign_crate::LogLevel,
+}
+
+/// 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()?))
+}
+
+mod foreign_crate {
+    #[derive(Copy, Clone, PartialEq, Eq, Debug)]
+    pub enum LogLevel {
+        Trace,
+        Debug,
+        Info,
+        Warn,
+        Error,
+    }
+
+    impl std::fmt::Display for LogLevel {
+        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+            let s = match self {
+                Self::Trace => "trace",
+                Self::Debug => "debug",
+                Self::Info => "info",
+                Self::Warn => "warn",
+                Self::Error => "error",
+            };
+            s.fmt(f)
+        }
+    }
+    impl std::str::FromStr for LogLevel {
+        type Err = String;
+
+        fn from_str(s: &str) -> Result<Self, Self::Err> {
+            match s {
+                "trace" => Ok(Self::Trace),
+                "debug" => Ok(Self::Debug),
+                "info" => Ok(Self::Info),
+                "warn" => Ok(Self::Warn),
+                "error" => Ok(Self::Error),
+                _ => Err(format!("Unknown log level: {s}")),
+            }
+        }
+    }
+}
+
+fn main() {
+    let args = Args::parse();
+    println!("{:?}", args);
+}
-- 
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