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Add a suggestion when using a type alias instead of trait alias
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13 changes: 13 additions & 0 deletions
13
src/test/ui/traits/alias/suggest-trait-alias-instead-of-type.fixed
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// Regression test of #43913. | ||
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// run-rustfix | ||
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#![feature(trait_alias)] | ||
#![allow(bare_trait_objects, dead_code)] | ||
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trait Strings = Iterator<Item=String>; | ||
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struct Struct<S: Strings>(S); | ||
//~^ ERROR: expected trait, found type alias `Strings` | ||
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fn main() {} |
13 changes: 13 additions & 0 deletions
13
src/test/ui/traits/alias/suggest-trait-alias-instead-of-type.rs
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Original file line number | Diff line number | Diff line change |
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// Regression test of #43913. | ||
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// run-rustfix | ||
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#![feature(trait_alias)] | ||
#![allow(bare_trait_objects, dead_code)] | ||
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type Strings = Iterator<Item=String>; | ||
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struct Struct<S: Strings>(S); | ||
//~^ ERROR: expected trait, found type alias `Strings` | ||
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fn main() {} |
14 changes: 14 additions & 0 deletions
14
src/test/ui/traits/alias/suggest-trait-alias-instead-of-type.stderr
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error[E0404]: expected trait, found type alias `Strings` | ||
--> $DIR/suggest-trait-alias-instead-of-type.rs:10:18 | ||
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LL | struct Struct<S: Strings>(S); | ||
| ^^^^^^^ type aliases cannot be used as traits | ||
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help: you might have meant to use `#![feature(trait_alias)]` instead of a `type` alias | ||
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LL | trait Strings = Iterator<Item=String>; | ||
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error: aborting due to previous error | ||
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For more information about this error, try `rustc --explain E0404`. |