mirror of https://github.com/rust-lang/rust
22 lines
577 B
Rust
22 lines
577 B
Rust
//@ run-pass
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// Test that we are able to type-check this example. In particular,
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// knowing that `T: 'a` allows us to deduce that `[U]: 'a` (because
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// when `T=[U]` it implies that `U: 'a`).
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//
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// Regr. test for live code we found in the wild when fixing #18937.
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pub trait Leak<T : ?Sized> {
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fn leak<'a>(self) -> &'a T where T: 'a;
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}
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impl<U> Leak<[U]> for Vec<U> {
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fn leak<'a>(mut self) -> &'a [U] where [U]: 'a {
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let r: *mut [U] = &mut self[..];
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std::mem::forget(self);
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unsafe { &mut *r }
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}
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}
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fn main() {
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println!("Hello, world!");
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}
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