rust/tests/rustdoc-ui/normalize-cycle.rs
2023-01-11 09:32:08 +00:00

27 lines
538 B
Rust

// check-pass
// compile-flags: -Znormalize-docs
// Regression test for <https://github.com/rust-lang/rust/issues/79459>.
pub trait Query {}
pub trait AsQuery {
type Query;
}
impl<T: Query> AsQuery for T {
type Query = T;
}
pub trait SelectDsl<Selection> {
type Output;
}
impl<T, Selection> SelectDsl<Selection> for T
where
T: AsQuery,
T::Query: SelectDsl<Selection>,
{
type Output = <T::Query as SelectDsl<Selection>>::Output;
}
pub type Select<Source, Selection> = <Source as SelectDsl<Selection>>::Output;