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Rollup merge of #31130 - marcbowes:master, r=nrc

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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.
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Steve Klabnik 2016-01-23 09:38:44 -05:00
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src/librustc_typeck/diagnostics.rs
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@ -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: