---

yaml
---
r: 152368
b: refs/heads/try2
c: 6b3d380
h: refs/heads/master
v: v3

Author: sfackler

[refs]

@@ -5,7 +5,7 @@ refs/heads/snap-stage3: 78a7676898d9f80ab540c6df5d4c9ce35bb50463
 refs/heads/try: 519addf6277dbafccbb4159db4b710c37eaa2ec5
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
-refs/heads/try2: 92221aba7b5f3e1688548cb97f51a21da981e3e2
+refs/heads/try2: 6b3d3803eb8437907153bbb1b3c3978b29cd3a3b
 refs/heads/dist-snap: ba4081a5a8573875fed17545846f6f6902c8ba8d
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503

branches/try2/src/libcore/cmp.rs

@@ -43,8 +43,10 @@
 /// equivalence relation. For example, in floating point numbers `NaN != NaN`,
 /// so floating point types implement `PartialEq` but not `Eq`.
 ///
-/// PartialEq only requires the `eq` method to be implemented; `ne` is its
-/// negation by default.
+/// PartialEq only requires the `eq` method to be implemented; `ne` is defined
+/// in terms of it by default. Any manual implementation of `ne` *must* respect
+/// the rule that `eq` is a strict inverse of `ne`; that is, `!(a == b)` if and
+/// only if `a != b`.
 ///
 /// Eventually, this will be implemented by default for types that implement
 /// `Eq`.