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Add test in higher-ranked

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Luv-Ray 2024-03-23 23:33:43 +08:00
parent c3b05c6e5b
commit 246f7465b3
2 changed files with 44 additions and 0 deletions
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17
tests/ui/higher-ranked/structually-relate-aliases.rs Normal file
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// regression test for issue #121649.
trait ToUnit<'a> {
type Unit;
}
trait Overlap<T> {}
type Assoc<'a, T> = <T as ToUnit<'a>>::Unit;
impl<T> Overlap<T> for T {}
impl<T> Overlap<for<'a> fn(&'a (), Assoc<'a, T>)> for T {}
//~^ ERROR 13:17: 13:49: the trait bound `for<'a> T: ToUnit<'a>` is not satisfied [E0277]
//~| ERROR 13:36: 13:48: the trait bound `for<'a> T: ToUnit<'a>` is not satisfied [E0277]
fn main() {}

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tests/ui/higher-ranked/structually-relate-aliases.stderr Normal file
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WARN rustc_infer::infer::relate::generalize may incompletely handle alias type: AliasTy { args: [?1t, '^0.Named(DefId(0:15 ~ structually_relate_aliases[de75]::{impl#1}::'a), "'a")], def_id: DefId(0:5 ~ structually_relate_aliases[de75]::ToUnit::Unit) }
WARN rustc_infer::infer::relate::generalize may incompletely handle alias type: AliasTy { args: [?1t, !2_0.Named(DefId(0:15 ~ structually_relate_aliases[de75]::{impl#1}::'a), "'a")], def_id: DefId(0:5 ~ structually_relate_aliases[de75]::ToUnit::Unit) }
error[E0277]: the trait bound `for<'a> T: ToUnit<'a>` is not satisfied
--> $DIR/structually-relate-aliases.rs:13:36
|
LL | impl<T> Overlap<for<'a> fn(&'a (), Assoc<'a, T>)> for T {}
| ^^^^^^^^^^^^ the trait `for<'a> ToUnit<'a>` is not implemented for `T`
|
help: consider restricting type parameter `T`
|
LL | impl<T: for<'a> ToUnit<'a>> Overlap<for<'a> fn(&'a (), Assoc<'a, T>)> for T {}
| ++++++++++++++++++++
error[E0277]: the trait bound `for<'a> T: ToUnit<'a>` is not satisfied
--> $DIR/structually-relate-aliases.rs:13:17
|
LL | impl<T> Overlap<for<'a> fn(&'a (), Assoc<'a, T>)> for T {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `for<'a> ToUnit<'a>` is not implemented for `T`
|
help: consider restricting type parameter `T`
|
LL | impl<T: for<'a> ToUnit<'a>> Overlap<for<'a> fn(&'a (), Assoc<'a, T>)> for T {}
| ++++++++++++++++++++
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0277`.