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Rollup merge of #43176 - RalfJung:explain, r=eddyb

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E0122: clarify wording

I *assume* the reason these constraints are not hard errors is backwards compatibility. If yes, I think the error explanation (at least the long form) should be clearer about that, which is what this PR does.

If not, the explanation should give some other suitable explanation.
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Guillaume Gomez 2017-08-11 10:20:16 +02:00 committed by GitHub
commit 7a80cf1ef1
1 changed files with 3 additions and 3 deletions
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src/librustc_typeck/diagnostics.rs
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@ -1525,9 +1525,9 @@ static BAR: _ = "test"; // error, explicitly write out the type instead
"##,
E0122: r##"
An attempt was made to add a generic constraint to a type alias. While Rust will
allow this with a warning, it will not currently enforce the constraint.
Consider the example below:
An attempt was made to add a generic constraint to a type alias. This constraint
is entirely ignored. For backwards compatibility, Rust still allows this with a
warning. Consider the example below:
```
trait Foo{}