Support impl Trait in return type
#282
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Without #![feature(impl_trait_in_bindings)]:
error[E0562]: `impl Trait` is not allowed in paths
--> tests/test.rs:1680:42
|
1680 | async fn method(&self) -> Result<impl AsRef<str> + Send + Sync, Self::Error> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `impl Trait` is only allowed in arguments and return types of functions and methods
error[E0562]: `impl Trait` is not allowed in the type of variable bindings
--> tests/test.rs:1680:42
|
1680 | async fn method(&self) -> Result<impl AsRef<str> + Send + Sync, Self::Error> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `impl Trait` is only allowed in arguments and return types of functions and methods
= note: see issue #63065 <rust-lang/rust#63065> for more information
= help: add `#![feature(impl_trait_in_bindings)]` to the crate attributes to enable
= note: this compiler was built on 2025-01-02; consider upgrading it if it is out of date
With #![feature(impl_trait_in_bindings)]:
error[E0562]: `impl Trait` is not allowed in paths
--> tests/test.rs:1680:42
|
1680 | async fn method(&self) -> Result<impl AsRef<str> + Send + Sync, Self::Error> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `impl Trait` is only allowed in arguments and return types of functions and methods
dtolnay
changed the title
impl Trait in return type
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Closes #281.