a.hash(&mut FakeHasher(v));
}
+struct OnlyOneByteHasher;
+impl Hasher for OnlyOneByteHasher {
+ fn finish(&self) -> u64 {
+ unreachable!()
+ }
+
+ fn write(&mut self, bytes: &[u8]) {
+ assert_eq!(bytes.len(), 1);
+ }
+}
+
fn main() {
let person1 = Person {
id: 5,
let mut v = vec![];
fake_hash(&mut v, SingleVariantEnum::A(17));
assert_eq!(vec![17], v);
+
+ // issue #39137
+ #[repr(u8)]
+ #[derive(Hash)]
+ enum E {
+ A,
+ B,
+ }
+ E::A.hash(&mut OnlyOneByteHasher);
}