diff options
Diffstat (limited to 'vendor/clap/examples/tutorial_builder/03_05_default_values.rs')
-rw-r--r-- | vendor/clap/examples/tutorial_builder/03_05_default_values.rs | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/vendor/clap/examples/tutorial_builder/03_05_default_values.rs b/vendor/clap/examples/tutorial_builder/03_05_default_values.rs new file mode 100644 index 000000000..d259ee06e --- /dev/null +++ b/vendor/clap/examples/tutorial_builder/03_05_default_values.rs @@ -0,0 +1,18 @@ +use clap::{arg, command, value_parser}; + +fn main() { + let matches = command!() // requires `cargo` feature + .arg( + arg!([PORT]) + .value_parser(value_parser!(u16)) + .default_value("2020"), + ) + .get_matches(); + + println!( + "port: {:?}", + matches + .get_one::<u16>("PORT") + .expect("default ensures there is always a value") + ); +} |