From 97f9cad5696b2550f1b3642e022892f0315c53c1 Mon Sep 17 00:00:00 2001
From: Marc Bowes <marcbowes@gmail.com>
Date: Fri, 22 Jan 2016 22:20:36 +0200
Subject: [PATCH] E0210: Add a warning about type aliases

E0210 explains about orphan rules and suggests using a local type as a
workaround. It wasn't obvious to me that I couldn't use a type
alias, so I added a note.
---
 src/librustc_typeck/diagnostics.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/librustc_typeck/diagnostics.rs b/src/librustc_typeck/diagnostics.rs
index 55a1021f0fb94..e9e4c45581a1b 100644
--- a/src/librustc_typeck/diagnostics.rs
+++ b/src/librustc_typeck/diagnostics.rs
@@ -2269,6 +2269,8 @@ struct MyType<T>(T);
 impl<T> ForeignTrait for MyType<T> { ... } // Ok
 ```
 
+Please note that a type alias is not sufficient.
+
 For another example of an error, suppose there's another trait defined in `foo`
 named `ForeignTrait2` that takes two type parameters. Then this `impl` results
 in the same rule violation: