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16 changes: 16 additions & 0 deletions
16
tests/ui/borrowck/alias-liveness/higher-ranked-outlives-for-capture.rs
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// known-bug: #42940 | ||
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trait Captures<'a> {} | ||
impl<T> Captures<'_> for T {} | ||
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trait Outlives<'a>: 'a {} | ||
impl<'a, T: 'a> Outlives<'a> for T {} | ||
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// Test that we treat `for<'a> Opaque: 'a` as `Opaque: 'static` | ||
fn test<'o>(v: &'o Vec<i32>) -> impl Captures<'o> + for<'a> Outlives<'a> {} | ||
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fn statik() -> impl Sized { | ||
test(&vec![]) | ||
} | ||
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fn main() {} |
16 changes: 16 additions & 0 deletions
16
tests/ui/borrowck/alias-liveness/higher-ranked-outlives-for-capture.stderr
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error[E0716]: temporary value dropped while borrowed | ||
--> $DIR/higher-ranked-outlives-for-capture.rs:13:11 | ||
| | ||
LL | test(&vec![]) | ||
| ------^^^^^^- | ||
| | | | ||
| | creates a temporary value which is freed while still in use | ||
| argument requires that borrow lasts for `'static` | ||
LL | } | ||
| - temporary value is freed at the end of this statement | ||
| | ||
= note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info) | ||
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error: aborting due to previous error | ||
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For more information about this error, try `rustc --explain E0716`. |
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// check-pass | ||
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trait Captures<'a> {} | ||
impl<T> Captures<'_> for T {} | ||
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trait Outlives<'a>: 'a {} | ||
impl<'a, T: 'a> Outlives<'a> for T {} | ||
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// Test that we treat `for<'a> Opaque: 'a` as `Opaque: 'static` | ||
fn test<'o>(v: &'o Vec<i32>) -> impl Captures<'o> + for<'a> Outlives<'a> {} | ||
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fn opaque_doesnt_use_temporary() { | ||
let a = test(&vec![]); | ||
} | ||
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fn main() {} |
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// check-pass | ||
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// Check that opaques capturing early and late-bound vars correctly mark | ||
// regions required to be live using the item bounds. | ||
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trait Captures<'a> {} | ||
impl<T> Captures<'_> for T {} | ||
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fn captures_temp_early<'a>(x: &'a Vec<i32>) -> impl Sized + Captures<'a> + 'static {} | ||
fn captures_temp_late<'a: 'a>(x: &'a Vec<i32>) -> impl Sized + Captures<'a> + 'static {} | ||
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fn test() { | ||
let x = captures_temp_early(&vec![]); | ||
let y = captures_temp_late(&vec![]); | ||
} | ||
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fn main() {} |
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// known-bug: #42940 | ||
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trait Trait {} | ||
impl Trait for () {} | ||
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fn foo<'a>(s: &'a str) -> impl Trait + 'static { | ||
bar(s) | ||
} | ||
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fn bar<P: AsRef<str>>(s: P) -> impl Trait + 'static { | ||
() | ||
} | ||
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fn main() {} |
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error[E0700]: hidden type for `impl Trait + 'static` captures lifetime that does not appear in bounds | ||
--> $DIR/opaque-type-param.rs:7:5 | ||
| | ||
LL | fn foo<'a>(s: &'a str) -> impl Trait + 'static { | ||
| -- -------------------- opaque type defined here | ||
| | | ||
| hidden type `impl Trait + 'static` captures the lifetime `'a` as defined here | ||
LL | bar(s) | ||
| ^^^^^^ | ||
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error: aborting due to previous error | ||
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For more information about this error, try `rustc --explain E0700`. |
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