mirror of https://github.com/rust-lang/rust
22 lines
418 B
Rust
22 lines
418 B
Rust
//@ check-pass
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// Regression test for issue #63677 - ensure that
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// coherence checking can properly handle 'impl trait'
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// in type aliases
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#![feature(type_alias_impl_trait)]
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pub trait Trait {}
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pub struct S1<T>(T);
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pub struct S2<T>(T);
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pub type T1 = impl Trait;
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pub type T2 = S1<T1>;
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pub type T3 = S2<T2>;
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impl<T> Trait for S1<T> {}
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impl<T: Trait> S2<T> {}
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impl T3 {}
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pub fn use_t1() -> T1 { S1(()) }
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fn main() {}
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