Rollup merge of #35728 - petrochenkov:empderive, r=manishearth

Fix #[derive] for empty tuple structs/variants

This was missing from https://github.com/rust-lang/rust/pull/35138

1 files changed, 23 insertions, 1 deletions

diff --git a/src/test/run-pass-fulldeps/empty-struct-braces-derive.rs b/src/test/run-pass-fulldeps/empty-struct-braces-derive.rs
index 8d19209208d..66ffff94333 100644
--- a/src/test/run-pass-fulldeps/empty-struct-braces-derive.rs
+++ b/src/test/run-pass-fulldeps/empty-struct-braces-derive.rs
@@ -8,8 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// `#[derive(Trait)]` works for empty structs/variants with braces
+// `#[derive(Trait)]` works for empty structs/variants with braces or parens.
 
+#![feature(relaxed_adts)]
 #![feature(rustc_private)]
 
 extern crate serialize as rustc_serialize;
@@ -19,10 +20,15 @@ extern crate serialize as rustc_serialize;
 struct S {}
 
 #[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash,
+         Default, Debug, RustcEncodable, RustcDecodable)]
+struct Z();
+
+#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash,
          Debug, RustcEncodable, RustcDecodable)]
 enum E {
     V {},
     U,
+    W(),
 }
 
 fn main() {
@@ -34,6 +40,14 @@ fn main() {
     assert!(!(s < s1));
     assert_eq!(format!("{:?}", s), "S");
 
+    let z = Z();
+    let z1 = z;
+    let z2 = z.clone();
+    assert_eq!(z, z1);
+    assert_eq!(z, z2);
+    assert!(!(z < z1));
+    assert_eq!(format!("{:?}", z), "Z");
+
     let e = E::V {};
     let e1 = e;
     let e2 = e.clone();
@@ -41,4 +55,12 @@ fn main() {
     assert_eq!(e, e2);
     assert!(!(e < e1));
     assert_eq!(format!("{:?}", e), "V");
+
+    let e = E::W();
+    let e1 = e;
+    let e2 = e.clone();
+    assert_eq!(e, e1);
+    assert_eq!(e, e2);
+    assert!(!(e < e1));
+    assert_eq!(format!("{:?}", e), "W");
 }