59 lines
1.1 KiB
Rust
59 lines
1.1 KiB
Rust
//@ run-pass
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// Test that the lifetime of the enclosing `&` is used for the object
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// lifetime bound.
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//@ pretty-expanded FIXME #23616
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#![allow(dead_code)]
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use std::fmt::Display;
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trait Test {
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fn foo(&self) { }
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}
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struct Ref<'a,T:'a+?Sized> {
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r: &'a T
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}
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struct Ref2<'a,'b,T:'a+'b+?Sized> {
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a: &'a T,
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b: &'b T
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}
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struct SomeStruct<'a> {
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t: Ref<'a, dyn Test>,
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u: Ref<'a, dyn Test+'a>,
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}
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fn a<'a>(t: Ref<'a, dyn Test>, mut ss: SomeStruct<'a>) {
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ss.t = t;
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}
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fn b<'a>(t: Ref<'a, dyn Test>, mut ss: SomeStruct<'a>) {
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ss.u = t;
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}
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fn c<'a>(t: Ref<'a, dyn Test+'a>, mut ss: SomeStruct<'a>) {
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ss.t = t;
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}
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fn d<'a>(t: Ref<'a, dyn Test+'a>, mut ss: SomeStruct<'a>) {
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ss.u = t;
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}
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fn e<'a>(_: Ref<'a, dyn Display+'static>) {}
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fn g<'a, 'b>(_: Ref2<'a, 'b, dyn Display+'static>) {}
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fn main() {
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// Inside a function body, we can just infer all
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// lifetimes, to allow Ref<'tmp, Display+'static>
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// and Ref2<'tmp, 'tmp, Display+'static>.
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let x = &0 as &(dyn Display+'static);
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let r: Ref<dyn Display> = Ref { r: x };
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let r2: Ref2<dyn Display> = Ref2 { a: x, b: x };
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e(r);
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g(r2);
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}
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