mirror of https://github.com/rust-lang/rust
41 lines
766 B
Rust
41 lines
766 B
Rust
//@ compile-flags:-Zverbose-internals
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#![allow(warnings)]
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trait Anything { }
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impl<T> Anything for T { }
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fn no_region<'a, T>(mut x: T) -> Box<dyn Anything + 'a>
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where
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T: Iterator,
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{
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Box::new(x.next())
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//~^ ERROR the associated type `<T as Iterator>::Item` may not live long enough
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}
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fn correct_region<'a, T>(mut x: T) -> Box<dyn Anything + 'a>
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where
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T: 'a + Iterator,
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{
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Box::new(x.next())
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}
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fn wrong_region<'a, 'b, T>(mut x: T) -> Box<dyn Anything + 'a>
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where
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T: 'b + Iterator,
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{
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Box::new(x.next())
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//~^ ERROR the associated type `<T as Iterator>::Item` may not live long enough
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}
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fn outlives_region<'a, 'b, T>(mut x: T) -> Box<dyn Anything + 'a>
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where
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T: 'b + Iterator,
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'b: 'a,
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{
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Box::new(x.next())
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}
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fn main() {}
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