28 lines
589 B
Rust
28 lines
589 B
Rust
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// edition:2018
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// run-pass
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// revisions: migrate mir
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//[mir]compile-flags: -Z borrowck=mir
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trait Trait<'a, 'b> { }
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impl<T> Trait<'_, '_> for T { }
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// Test case where we have elision in the impl trait and we have to
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// pick the right region.
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// Ultimately `Trait<'x, 'static>`.
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fn upper_bounds1(a: &u8) -> impl Trait<'_, 'static> {
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(a, a)
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}
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// Ultimately `Trait<'x, 'x>`, so not really multiple bounds.
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fn upper_bounds2(a: &u8) -> impl Trait<'_, '_> {
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(a, a)
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}
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// Kind of a weird annoying case.
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fn upper_bounds3<'b>(a: &u8) -> impl Trait<'_, 'b> {
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(a, a)
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}
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fn main() { }
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