1 files changed, 15 insertions, 0 deletions
diff --git a/structopt/examples/negative_flag.rs b/structopt/examples/negative_flag.rs
new file mode 100644
index 0000000..b178bf5
--- /dev/null
+++ b/structopt/examples/negative_flag.rs
@@ -0,0 +1,15 @@
+//! How to add `no-thing` flag which is `true` by default and
+//! `false` if passed.
+
+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);
+}