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Rollup merge of #105408 - cuviper:help-rpitirpit, r=compiler-errors

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Add help for `#![feature(impl_trait_in_fn_trait_return)]`

This adds a new variant `ImplTraitContext::FeatureGated`, so we can
generalize the help for `return_position_impl_trait_in_trait` to also
work for `impl_trait_in_fn_trait_return`.

cc #99697
This commit is contained in:
Matthias Krüger 2022-12-08 12:57:31 +01:00 • committed by GitHub
commit 2fbde2b028
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3 changed files with 40 additions and 17 deletions
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6
src/test/ui/feature-gates/feature-gate-impl_trait_in_fn_trait_return.stderr
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@ -3,12 +3,18 @@ error[E0562]: `impl Trait` only allowed in function and inherent method return t
|
LL | fn f() -> impl Fn() -> impl Sized { || () }
| ^^^^^^^^^^
|
= note: see issue #99697 <https://github.com/rust-lang/rust/issues/99697> for more information
= help: add `#![feature(impl_trait_in_fn_trait_return)]` to the crate attributes to enable
error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait return
--> $DIR/feature-gate-impl_trait_in_fn_trait_return.rs:3:32
|
LL | fn g() -> &'static dyn Fn() -> impl Sized { &|| () }
| ^^^^^^^^^^
|
= note: see issue #99697 <https://github.com/rust-lang/rust/issues/99697> for more information
= help: add `#![feature(impl_trait_in_fn_trait_return)]` to the crate attributes to enable
error: aborting due to 2 previous errors