22 lines
520 B
Rust
22 lines
520 B
Rust
// check-pass
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trait MultiRegionTrait<'a, 'b> {}
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impl<'a, 'b> MultiRegionTrait<'a, 'b> for (&'a u32, &'b u32) {}
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fn no_least_region<'a, 'b>(x: &'a u32, y: &'b u32) -> impl MultiRegionTrait<'a, 'b> {
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// Here we have a constraint that:
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//
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// (x, y) has type (&'0 u32, &'1 u32)
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//
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// where
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//
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// 'a: '0
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//
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// then we require that `('0 u32, &'1 u32): MultiRegionTrait<'a,
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// 'b>`, which winds up imposing a requirement that `'0 = 'a` and
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// `'1 = 'b`.
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(x, y)
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}
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fn main() {}
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