From c44d40e77f4dabbfff95a715006523b73918a7c4 Mon Sep 17 00:00:00 2001
From: "Felix S. Klock II" <pnkfelix@pnkfx.org>
Date: Fri, 10 Apr 2015 16:17:06 +0200
Subject: [PATCH] Test case for new `derive(PartialOrd)` expansion.

---
 src/test/run-pass/issue-15523.rs | 49 ++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 src/test/run-pass/issue-15523.rs

diff --git a/src/test/run-pass/issue-15523.rs b/src/test/run-pass/issue-15523.rs
new file mode 100644
index 00000000000..8edf360c985
--- /dev/null
+++ b/src/test/run-pass/issue-15523.rs
@@ -0,0 +1,49 @@
+// Copyright 2015 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.
+
+// Issue 15523: derive(PartialOrd) should use the provided
+// discriminant values for the derived ordering.
+
+#[derive(PartialEq, PartialOrd)]
+enum E1 {
+    Pos2 = 2,
+    Neg1 = -1,
+    Pos1 = 1,
+}
+
+#[derive(PartialEq, PartialOrd)]
+#[repr(u8)]
+enum E2 {
+    Pos2 = 2,
+    PosMax = !0 as u8,
+    Pos1 = 1,
+}
+
+#[derive(PartialEq, PartialOrd)]
+#[repr(i8)]
+enum E3 {
+    Pos2 = 2,
+    Neg1 = -1_i8,
+    Pos1 = 1,
+}
+
+fn main() {
+    assert!(E1::Pos2 > E1::Pos1);
+    assert!(E1::Pos1 > E1::Neg1);
+    assert!(E1::Pos2 > E1::Neg1);
+
+    assert!(E2::Pos2 > E2::Pos1);
+    assert!(E2::Pos1 < E2::PosMax);
+    assert!(E2::Pos2 < E2::PosMax);
+
+    assert!(E3::Pos2 > E3::Pos1);
+    assert!(E3::Pos1 > E3::Neg1);
+    assert!(E3::Pos2 > E3::Neg1);
+}