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//@ check-pass
// Regression test for an ICE: https://github.com/rust-lang/rust/issues/119916
#![feature(impl_trait_in_assoc_type)]
#![feature(type_alias_impl_trait)]
// `impl_trait_in_assoc_type` example from the bug report.
pub trait StreamConsumer {
type BarrierStream;
fn execute() -> Self::BarrierStream;
}
pub struct DispatchExecutor;
impl StreamConsumer for DispatchExecutor {
type BarrierStream = impl Sized;
fn execute() -> Self::BarrierStream {
|| -> _ {}
}
}
// Functions that constrain TAITs can contain closures with an `_` in the return type.
type Foo = impl Sized;
fn foo() -> Foo {
|| -> _ {}
}
// The `_` in the closure return type can also be the TAIT itself.
type Bar = impl Sized;
fn bar() -> impl FnOnce() -> Bar {
|| -> _ {}
}
fn main() {}
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