49 lines
1.5 KiB
Rust
49 lines
1.5 KiB
Rust
//@ check-fail
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trait Trait<'a> {}
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fn change_lt<'a, 'b>(x: *mut dyn Trait<'a>) -> *mut dyn Trait<'b> {
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x as _ //~ error: lifetime may not live long enough
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//~| error: lifetime may not live long enough
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}
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fn change_lt_ab<'a: 'b, 'b>(x: *mut dyn Trait<'a>) -> *mut dyn Trait<'b> {
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x as _ //~ error: lifetime may not live long enough
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}
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fn change_lt_ba<'a, 'b: 'a>(x: *mut dyn Trait<'a>) -> *mut dyn Trait<'b> {
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x as _ //~ error: lifetime may not live long enough
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}
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fn change_lt_hr<'a>(x: *mut dyn Trait<'a>) -> *mut dyn for<'b> Trait<'b> {
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x as _ //~ error: lifetime may not live long enough
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//~^ error: mismatched types
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//~| one type is more general than the other
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}
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trait Assocked {
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type Assoc: ?Sized;
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}
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fn change_assoc_0<'a, 'b>(
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x: *mut dyn Assocked<Assoc = dyn Send + 'a>,
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) -> *mut dyn Assocked<Assoc = dyn Send + 'b> {
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x as _ //~ error: lifetime may not live long enough
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//~| error: lifetime may not live long enough
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}
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fn change_assoc_1<'a, 'b>(
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x: *mut dyn Assocked<Assoc = dyn Trait<'a>>,
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) -> *mut dyn Assocked<Assoc = dyn Trait<'b>> {
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x as _ //~ error: lifetime may not live long enough
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//~| error: lifetime may not live long enough
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}
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// This tests the default borrow check error, without the special casing for return values.
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fn require_static(_: *const dyn Trait<'static>) {}
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fn extend_to_static<'a>(ptr: *const dyn Trait<'a>) {
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require_static(ptr as _) //~ error: lifetime may not live long enough
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}
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fn main() {}
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