Tweak E0401 #148447
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Tweak E0401 #148447
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```
error[E0401]: can't use `Self` from outer item
--> $DIR/E0401.rs:22:25
|
LL | impl<T> Iterator for A<T> {
| ---- `Self` type implicitly declared here, by this `impl`
...
LL | fn helper(sel: &Self) -> u8 {
| ------ ^^^^ use of `Self` from outer item
| |
| `Self` used in this inner function
|
help: refer to the type directly here instead
|
LL - fn helper(sel: &Self) -> u8 {
LL + fn helper(sel: &A<T>) -> u8 {
|
```
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GuillaumeGomez
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Nov 3, 2025
Tweak E0401 More accurate span pointing at use place of outer param (at ident instead of full path). Add note explaining why outer item params can't be used in inner item. Use structured suggestion for what `Self` should have been. Follow up to rust-lang#148370. Fix rust-lang#37892.
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Rollup of 7 pull requests Successful merges: - #147141 (Suggest making binding `mut` on `&mut` reborrow) - #147945 (Port `cfg!()` macro to the new attribute parsing system ) - #147951 (Add check for `+=` typo in let chains) - #148004 (fix: Only special case single line item attribute suggestions) - #148264 (reflect that type and const parameter can be intermixed) - #148363 (Fix `wasm_import_module` attribute cross-crate) - #148447 (Tweak E0401) r? `@ghost` `@rustbot` modify labels: rollup
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Nov 4, 2025
Rollup merge of #148447 - estebank:outer-param-2, r=jackh726 Tweak E0401 More accurate span pointing at use place of outer param (at ident instead of full path). Add note explaining why outer item params can't be used in inner item. Use structured suggestion for what `Self` should have been. Follow up to #148370. Fix #37892.
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More accurate span pointing at use place of outer param (at ident instead of full path).
Add note explaining why outer item params can't be used in inner item.
Use structured suggestion for what
Selfshould have been.Follow up to #148370.
Fix #37892.