Rollup merge of #95364 - GuillaumeGomez:long-error-explanation-e0667, r=Dylan-DPC
Add long error explanation for E0667 Part of #61137.
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dafc29dd72
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@ -394,6 +394,7 @@ E0663: include_str!("./error_codes/E0663.md"),
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E0664: include_str!("./error_codes/E0664.md"),
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E0665: include_str!("./error_codes/E0665.md"),
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E0666: include_str!("./error_codes/E0666.md"),
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E0667: include_str!("./error_codes/E0667.md"),
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E0668: include_str!("./error_codes/E0668.md"),
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E0669: include_str!("./error_codes/E0669.md"),
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E0670: include_str!("./error_codes/E0670.md"),
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@ -633,7 +634,6 @@ E0787: include_str!("./error_codes/E0787.md"),
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// attribute
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E0640, // infer outlives requirements
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// E0645, // trait aliases not finished
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E0667, // `impl Trait` in projections
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// E0694, // an unknown tool name found in scoped attributes
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// E0702, // replaced with a generic attribute input check
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// E0707, // multiple elided lifetimes used in arguments of `async fn`
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18
compiler/rustc_error_codes/src/error_codes/E0667.md
Normal file
18
compiler/rustc_error_codes/src/error_codes/E0667.md
Normal file
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@ -0,0 +1,18 @@
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`impl Trait` is not allowed in path parameters.
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Erroneous code example:
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```compile_fail,E0667
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fn some_fn(mut x: impl Iterator) -> <impl Iterator>::Item { // error!
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x.next().unwrap()
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}
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```
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You cannot use `impl Trait` in path parameters. If you want something
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equivalent, you can do this instead:
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```
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fn some_fn<T: Iterator>(mut x: T) -> T::Item { // ok!
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x.next().unwrap()
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}
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```
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@ -30,4 +30,5 @@ LL | fn projection_is_disallowed(x: impl Iterator) -> <impl Iterator>::Item {
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error: aborting due to 5 previous errors
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For more information about this error, try `rustc --explain E0223`.
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Some errors have detailed explanations: E0223, E0667.
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For more information about an error, try `rustc --explain E0223`.
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@ -6,3 +6,4 @@ LL | pub fn demo(_: impl Quux<(), Assoc=<() as Quux<impl Bar>>::Assoc>) { }
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error: aborting due to previous error
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For more information about this error, try `rustc --explain E0667`.
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