1 files changed, 83 insertions, 0 deletions
diff --git a/vendor/derivative/tests/rustc-deriving-hash.rs b/vendor/derivative/tests/rustc-deriving-hash.rs
new file mode 100644
index 000000000..bae6e8c8e
--- /dev/null
+++ b/vendor/derivative/tests/rustc-deriving-hash.rs
@@ -0,0 +1,83 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![allow(non_camel_case_types)]
+
+#[cfg(feature = "use_core")]
+extern crate core;
+
+#[macro_use]
+extern crate derivative;
+
+use std::hash::{Hash, Hasher};
+use std::collections::hash_map::DefaultHasher;
+
+#[derive(Derivative)]
+#[derivative(Hash)]
+struct Person {
+    id: u16,
+    name: String,
+    phone: u64,
+}
+
+// test for hygiene name collisions
+#[derive(Derivative)]
+#[derivative(Hash)] struct __H__H;
+#[derive(Derivative)]
+#[allow(dead_code)] #[derivative(Hash)] struct Collision<__H> ( __H );
+// TODO(rustc) #[derivative(Hash)] enum Collision<__H> { __H { __H__H: __H } }
+
+#[derive(Derivative)]
+#[derivative(Hash)]
+enum E { A=1, B }
+
+fn hash<T: Hash>(t: &T) -> u64 {
+    let mut s = DefaultHasher::new();
+    t.hash(&mut s);
+    s.finish()
+}
+
+struct FakeHasher<'a>(&'a mut Vec<u8>);
+impl<'a> Hasher for FakeHasher<'a> {
+    fn finish(&self) -> u64 {
+        unimplemented!()
+    }
+
+    fn write(&mut self, bytes: &[u8]) {
+        self.0.extend(bytes);
+    }
+}
+
+fn fake_hash(v: &mut Vec<u8>, e: E) {
+    e.hash(&mut FakeHasher(v));
+}
+
+#[test]
+fn main() {
+    let person1 = Person {
+        id: 5,
+        name: "Janet".to_string(),
+        phone: 555_666_777,
+    };
+    let person2 = Person {
+        id: 5,
+        name: "Bob".to_string(),
+        phone: 555_666_777,
+    };
+    assert_eq!(hash(&person1), hash(&person1));
+    assert!(hash(&person1) != hash(&person2));
+
+    // test #21714
+    let mut va = vec![];
+    let mut vb = vec![];
+    fake_hash(&mut va, E::A);
+    fake_hash(&mut vb, E::B);
+    assert!(va != vb);
+}