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https://github.com/rust-lang/rust
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21 lines
597 B
Rust
21 lines
597 B
Rust
// Test that `<F as Foo<'a>>::Type: 'b`, where `trait Foo<'a> { Type:
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// 'a; }`, does not require that `F: 'b`.
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//@ check-pass
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#![allow(dead_code)]
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trait SomeTrait<'a> {
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type Type: 'a;
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}
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impl<'a: 'c, 'c, T> SomeTrait<'a> for &'c T where T: SomeTrait<'a> {
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type Type = <T as SomeTrait<'a>>::Type;
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~
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// |
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// Note that this type must outlive 'a, due to the trait
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// definition. If we fall back to OutlivesProjectionComponents
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// here, then we would require that `T:'a`, which is too strong.
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}
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fn main() { }
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