From 20431706a863f92cb37dc512fef6e48d192aaf2c 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_builder/04_02_validate.rs | 36 ++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 vendor/clap-3.2.20/examples/tutorial_builder/04_02_validate.rs (limited to 'vendor/clap-3.2.20/examples/tutorial_builder/04_02_validate.rs') diff --git a/vendor/clap-3.2.20/examples/tutorial_builder/04_02_validate.rs b/vendor/clap-3.2.20/examples/tutorial_builder/04_02_validate.rs new file mode 100644 index 000000000..ea2f32e67 --- /dev/null +++ b/vendor/clap-3.2.20/examples/tutorial_builder/04_02_validate.rs @@ -0,0 +1,36 @@ +use std::ops::RangeInclusive; + +use clap::{arg, command}; + +fn main() { + let matches = command!() // requires `cargo` feature + .arg( + arg!() + .help("Network port to use") + .value_parser(port_in_range), + ) + .get_matches(); + + // Note, it's safe to call unwrap() because the arg is required + let port: u16 = *matches + .get_one::("PORT") + .expect("'PORT' is required and parsing will fail if its missing"); + println!("PORT = {}", 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