29 lines
556 B
Rust
29 lines
556 B
Rust
// Test that `dyn Bar<Item = XX>` uses `'static` as the default object
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// lifetime bound for the type `XX`.
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//
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//@ check-pass
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trait Foo {
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type Item: ?Sized;
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fn item(&self) -> Box<Self::Item> { panic!() }
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}
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trait Bar { }
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impl<T> Foo for T {
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type Item = dyn Bar;
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}
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fn is_static<T>(_: T) where T: 'static { }
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// Here, we default to `dyn Bar + 'static`, and not `&'x dyn Foo<Item
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// = dyn Bar + 'x>`.
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fn bar(x: &str) -> &dyn Foo<Item = dyn Bar> { &() }
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fn main() {
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let s = format!("foo");
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let r = bar(&s);
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is_static(r.item());
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}
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