mirror of https://github.com/rust-lang/rust.git
20 lines
339 B
Rust
20 lines
339 B
Rust
// check-pass
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#![feature(return_position_impl_trait_in_trait, lint_reasons)]
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#![allow(incomplete_features)]
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pub trait Foo {
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fn f() -> Box<impl Sized>;
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}
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impl Foo for () {
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#[expect(refining_impl_trait)]
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fn f() -> Box<String> {
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Box::new(String::new())
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}
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}
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fn main() {
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let x: Box<String> = <() as Foo>::f();
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}
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