1 files changed, 27 insertions, 0 deletions
diff --git a/third_party/rust/arbitrary/examples/derive_enum.rs b/third_party/rust/arbitrary/examples/derive_enum.rs
new file mode 100644
index 0000000000..c4fc9c9588
--- /dev/null
+++ b/third_party/rust/arbitrary/examples/derive_enum.rs
@@ -0,0 +1,27 @@
+//! A simple example of deriving the `Arbitrary` trait for an `enum`.
+//!
+//! Note that this requires enabling the "derive" cargo feature.
+
+// Various enums/fields that we are deriving `Arbitrary` for aren't actually
+// used except to show off the derive.
+#![allow(dead_code)]
+
+use arbitrary::{Arbitrary, Unstructured};
+
+#[derive(Arbitrary, Debug)]
+enum MyEnum {
+    UnitVariant,
+    TupleVariant(bool, u32),
+    StructVariant { x: i8, y: (u8, i32) },
+}
+
+fn main() {
+    let raw = b"This is some raw, unstructured data!";
+
+    let mut unstructured = Unstructured::new(raw);
+
+    let instance = MyEnum::arbitrary(&mut unstructured)
+        .expect("`unstructured` has enough underlying data to create all variants of `MyEnum`");
+
+    println!("Here is an arbitrary enum: {:?}", instance);
+}