From 1b6a04ca5504955c571d1c97504fb45ea0befee4 Mon Sep 17 00:00:00 2001 From: Valentin Popov Date: Mon, 8 Jan 2024 01:21:28 +0400 Subject: Initial vendor packages Signed-off-by: Valentin Popov --- .../examples/tutorial_derive/04_02_validate.rs | 34 ++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 vendor/clap/examples/tutorial_derive/04_02_validate.rs (limited to 'vendor/clap/examples/tutorial_derive/04_02_validate.rs') diff --git a/vendor/clap/examples/tutorial_derive/04_02_validate.rs b/vendor/clap/examples/tutorial_derive/04_02_validate.rs new file mode 100644 index 0000000..3391d5b --- /dev/null +++ b/vendor/clap/examples/tutorial_derive/04_02_validate.rs @@ -0,0 +1,34 @@ +use std::ops::RangeInclusive; + +use clap::Parser; + +#[derive(Parser)] +#[command(author, version, about, long_about = None)] +struct Cli { + /// Network port to use + #[arg(value_parser = port_in_range)] + port: u16, +} + +fn main() { + let cli = Cli::parse(); + + println!("PORT = {}", cli.port); +} + +const PORT_RANGE: RangeInclusive = 1..=65535; + +fn port_in_range(s: &str) -> Result { + let port: usize = s + .parse() + .map_err(|_| format!("`{s}` isn't a port number"))?; + if PORT_RANGE.contains(&port) { + Ok(port as u16) + } else { + Err(format!( + "port not in range {}-{}", + PORT_RANGE.start(), + PORT_RANGE.end() + )) + } +} -- cgit v1.2.3