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| author | Albert Larsan <74931857+albertlarsan68@users.noreply.github.com> | 2023-01-05 09:13:28 +0100 |
|---|---|---|
| committer | Albert Larsan <74931857+albertlarsan68@users.noreply.github.com> | 2023-01-11 09:32:08 +0000 |
| commit | cf2dff2b1e3fa55fa5415d524200070d0d7aacfe (patch) | |
| tree | 40a88d9a46aaf3e8870676eb2538378b75a263eb /tests/ui/object-lifetime/object-lifetime-default-ambiguous.rs | |
| parent | ca855e6e42787ecd062d81d53336fe6788ef51a9 (diff) | |
| download | rust-cf2dff2b1e3fa55fa5415d524200070d0d7aacfe.tar.gz rust-cf2dff2b1e3fa55fa5415d524200070d0d7aacfe.zip | |
Move /src/test to /tests
Diffstat (limited to 'tests/ui/object-lifetime/object-lifetime-default-ambiguous.rs')
| -rw-r--r-- | tests/ui/object-lifetime/object-lifetime-default-ambiguous.rs | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/tests/ui/object-lifetime/object-lifetime-default-ambiguous.rs b/tests/ui/object-lifetime/object-lifetime-default-ambiguous.rs new file mode 100644 index 00000000000..5dae92fee5f --- /dev/null +++ b/tests/ui/object-lifetime/object-lifetime-default-ambiguous.rs @@ -0,0 +1,48 @@ +// Test that if a struct declares multiple region bounds for a given +// type parameter, an explicit lifetime bound is required on object +// lifetimes within. + +#![allow(dead_code)] + +trait Test { + fn foo(&self) { } +} + +struct Ref0<T:?Sized> { + r: *mut T +} + +struct Ref1<'a,T:'a+?Sized> { + r: &'a T +} + +struct Ref2<'a,'b:'a,T:'a+'b+?Sized> { + r: &'a &'b T +} + +fn a<'a,'b>(t: Ref2<'a,'b, dyn Test>) { + //~^ ERROR lifetime bound for this object type cannot be deduced from context +} + +fn b(t: Ref2<dyn Test>) { + //~^ ERROR lifetime bound for this object type cannot be deduced from context +} + +fn c(t: Ref2<&dyn Test>) { + // In this case, the &'a overrides. +} + +fn d(t: Ref2<Ref1<dyn Test>>) { + // In this case, the lifetime parameter from the Ref1 overrides. +} + +fn e(t: Ref2<Ref0<dyn Test>>) { + // In this case, Ref2 is ambiguous, but Ref0 overrides with 'static. +} + +fn f(t: &Ref2<dyn Test>) { + //~^ ERROR lifetime bound for this object type cannot be deduced from context +} + +fn main() { +} |
