From cf94bdc0742c13e2a0cac864c478b8626b266e1b Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:11:38 +0200 Subject: Merging upstream version 1.66.0+dfsg1. Signed-off-by: Daniel Baumann --- .../examples/tutorial_derive/04_02_validate.rs | 34 ++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 vendor/clap-3.2.20/examples/tutorial_derive/04_02_validate.rs (limited to 'vendor/clap-3.2.20/examples/tutorial_derive/04_02_validate.rs') diff --git a/vendor/clap-3.2.20/examples/tutorial_derive/04_02_validate.rs b/vendor/clap-3.2.20/examples/tutorial_derive/04_02_validate.rs new file mode 100644 index 000000000..7dac79c9f --- /dev/null +++ b/vendor/clap-3.2.20/examples/tutorial_derive/04_02_validate.rs @@ -0,0 +1,34 @@ +use std::ops::RangeInclusive; + +use clap::Parser; + +#[derive(Parser)] +#[clap(author, version, about, long_about = None)] +struct Cli { + /// Network port to use + #[clap(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!("`{}` isn't a port number", s))?; + 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