---

yaml
---
r: 116576
b: refs/heads/snap-stage3
c: 6b3d380
h: refs/heads/master
v: v3

Author: sfackler

[refs]

@@ -1,7 +1,7 @@
 ---
 refs/heads/master: bee4e6adac17f87b1cdc26ab69f8c0f5d82575a3
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
-refs/heads/snap-stage3: 92221aba7b5f3e1688548cb97f51a21da981e3e2
+refs/heads/snap-stage3: 6b3d3803eb8437907153bbb1b3c3978b29cd3a3b
 refs/heads/try: 009d898a9422ac04c1aa60c0e9aff3abc5fa4672
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b

branches/snap-stage3/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`.