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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:19:13 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:19:13 +0000
commit218caa410aa38c29984be31a5229b9fa717560ee (patch)
treec54bd55eeb6e4c508940a30e94c0032fbd45d677 /vendor/clap/examples/tutorial_builder/03_05_default_values.rs
parentReleasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff)
downloadrustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz
rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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.rs18
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")
+ );
+}