Add an example of a negative flag (i.e. --no-verbose)

Question from #280
TeXitoi · Nov 26, 2019 · 42aa40f · 42aa40f
1 parent fbe6a55
commit 42aa40f
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/examples/negative_flag.rs b/examples/negative_flag.rs
@@ -0,0 +1,12 @@
+use structopt::StructOpt;
+
+#[derive(Debug, StructOpt)]
+struct Opt {
+    #[structopt(long = "no-verbose", parse(from_flag = std::ops::Not::not))]
+    verbose: bool,
+}
+
+fn main() {
+    let cmd = Opt::from_args();
+    println!("{:#?}", cmd);
+}