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| author | bors <bors@rust-lang.org> | 2020-08-16 11:16:44 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2020-08-16 11:16:44 +0000 |
| commit | 97ba0c7171c4d2d9b899a2bd8e40a8974c47b86d (patch) | |
| tree | 22603fcd15f78b1044746a48b2b282b8983cb0c6 /src/test/ui/parser | |
| parent | de32266a1780aa4ef748ce7f6200a1554fad0aca (diff) | |
| parent | 0afb9c28bb80467cf2af8e9cd1f1b6af63744004 (diff) | |
| download | rust-97ba0c7171c4d2d9b899a2bd8e40a8974c47b86d.tar.gz rust-97ba0c7171c4d2d9b899a2bd8e40a8974c47b86d.zip | |
Auto merge of #75536 - estebank:e0255-suggestion, r=varkor
Tweak output of E0225 When encountering multiple non-auto trait bounds suggest creating a new trait and explain what auto-traits are. _Inspired by https://fasterthanli.me/articles/frustrated-its-not-you-its-rust_
Diffstat (limited to 'src/test/ui/parser')
| -rw-r--r-- | src/test/ui/parser/trait-object-trait-parens.stderr | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/src/test/ui/parser/trait-object-trait-parens.stderr b/src/test/ui/parser/trait-object-trait-parens.stderr index 62da99bc47d..6efbfad8f38 100644 --- a/src/test/ui/parser/trait-object-trait-parens.stderr +++ b/src/test/ui/parser/trait-object-trait-parens.stderr @@ -40,34 +40,34 @@ error[E0225]: only auto traits can be used as additional traits in a trait objec --> $DIR/trait-object-trait-parens.rs:8:35 | LL | let _: Box<(Obj) + (?Sized) + (for<'a> Trait<'a>)>; - | ----- ^^^^^^^^^^^^^^^^^^^ - | | | - | | additional non-auto trait - | | trait alias used in trait object type (additional use) + | ----- ^^^^^^^^^^^^^^^^^^^ additional non-auto trait + | | | first non-auto trait - | trait alias used in trait object type (first use) + | + = help: consider creating a new trait with all of these as super-traits and using that trait here instead: `trait NewTrait: Obj + for<'a> Trait<'a> {}` + = note: auto-traits like `Send` and `Sync` are traits that have special properties; for more information on them, visit <https://doc.rust-lang.org/reference/special-types-and-traits.html#auto-traits> error[E0225]: only auto traits can be used as additional traits in a trait object --> $DIR/trait-object-trait-parens.rs:12:49 | LL | let _: Box<(?Sized) + (for<'a> Trait<'a>) + (Obj)>; - | ------------------- ^^^^^ - | | | - | | additional non-auto trait - | | trait alias used in trait object type (additional use) + | ------------------- ^^^^^ additional non-auto trait + | | | first non-auto trait - | trait alias used in trait object type (first use) + | + = help: consider creating a new trait with all of these as super-traits and using that trait here instead: `trait NewTrait: for<'a> Trait<'a> + Obj {}` + = note: auto-traits like `Send` and `Sync` are traits that have special properties; for more information on them, visit <https://doc.rust-lang.org/reference/special-types-and-traits.html#auto-traits> error[E0225]: only auto traits can be used as additional traits in a trait object --> $DIR/trait-object-trait-parens.rs:16:38 | LL | let _: Box<(for<'a> Trait<'a>) + (Obj) + (?Sized)>; - | ----------------- ^^^^^ - | | | - | | additional non-auto trait - | | trait alias used in trait object type (additional use) + | ----------------- ^^^^^ additional non-auto trait + | | | first non-auto trait - | trait alias used in trait object type (first use) + | + = help: consider creating a new trait with all of these as super-traits and using that trait here instead: `trait NewTrait: for<'a> Trait<'a> + Obj {}` + = note: auto-traits like `Send` and `Sync` are traits that have special properties; for more information on them, visit <https://doc.rust-lang.org/reference/special-types-and-traits.html#auto-traits> error: aborting due to 6 previous errors; 3 warnings emitted |