diff options
Diffstat (limited to 'src/test/ui/feature-gates/feature-gate-return_position_impl_trait_in_trait.rs')
-rw-r--r-- | src/test/ui/feature-gates/feature-gate-return_position_impl_trait_in_trait.rs | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/test/ui/feature-gates/feature-gate-return_position_impl_trait_in_trait.rs b/src/test/ui/feature-gates/feature-gate-return_position_impl_trait_in_trait.rs new file mode 100644 index 000000000..637765fff --- /dev/null +++ b/src/test/ui/feature-gates/feature-gate-return_position_impl_trait_in_trait.rs @@ -0,0 +1,18 @@ +// edition:2021 + +// async_fn_in_trait is not enough to allow use of RPITIT +#![allow(incomplete_features)] +#![feature(async_fn_in_trait)] + +trait Foo { + fn bar() -> impl Sized; //~ ERROR `impl Trait` only allowed in function and inherent method return types, not in trait method return + fn baz() -> Box<impl std::fmt::Display>; //~ ERROR `impl Trait` only allowed in function and inherent method return types, not in trait method return +} + +// Both return_position_impl_trait_in_trait and async_fn_in_trait are required for this (see also +// feature-gate-async_fn_in_trait.rs) +trait AsyncFoo { + async fn bar() -> impl Sized; //~ ERROR `impl Trait` only allowed in function and inherent method return types, not in trait method return +} + +fn main() {} |