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Regression test for RPIT inheriting lifetime from projection #134408

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Dec 18, 2024
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Regression test for RPIT inheriting lifetime from projection #134408

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24 changes: 24 additions & 0 deletions tests/ui/impl-trait/rpit/inherits-lifetime.rs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,24 @@
//! Check that lifetimes are inherited in RPIT.
//! Previously, the hidden lifetime of T::Bar would be overlooked
//! and would instead end up as <T as Foo<'static>>::Bar.
//!
//! Regression test for <https://github.com/rust-lang/rust/issues/51525>.

//@ check-pass

trait Foo<'a> {
type Bar;
}

impl<'a> Foo<'a> for u32 {
type Bar = &'a ();
}

fn baz<'a, T>() -> impl IntoIterator<Item = T::Bar>
where
T: Foo<'a>,
{
None
}

fn main() {}
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