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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/associated-types/project-recursion-limit-non-fatal.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/associated-types/project-recursion-limit-non-fatal.rs')
-rw-r--r-- | src/test/ui/associated-types/project-recursion-limit-non-fatal.rs | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/test/ui/associated-types/project-recursion-limit-non-fatal.rs b/src/test/ui/associated-types/project-recursion-limit-non-fatal.rs new file mode 100644 index 000000000..3e68b1401 --- /dev/null +++ b/src/test/ui/associated-types/project-recursion-limit-non-fatal.rs @@ -0,0 +1,58 @@ +// Regression test for #80953. Hitting the recursion limit in projection +// is non-fatal. The above code, minimised from wundergraph shows a case +// where this is relied on. + +// check-pass + +struct AlternateTable {} +struct AlternateQuery {} + +pub trait Query {} +pub trait AsQuery { + type Query; +} +impl<T: Query> AsQuery for T { + type Query = Self; +} +impl AsQuery for AlternateTable { + type Query = AlternateQuery; +} + +pub trait Table: AsQuery { + type PrimaryKey; +} +impl Table for AlternateTable { + type PrimaryKey = (); +} + +pub trait FilterDsl<Predicate> { + type Output; +} +pub type Filter<Source, Predicate> = <Source as FilterDsl<Predicate>>::Output; +impl<T, Predicate> FilterDsl<Predicate> for T +where + T: Table, + T::Query: FilterDsl<Predicate>, +{ + type Output = Filter<T::Query, Predicate>; +} +impl<Predicate> FilterDsl<Predicate> for AlternateQuery { + type Output = &'static str; +} + +pub trait HandleDelete { + type Filter; +} +impl<T> HandleDelete for T +where + T: Table, + T::Query: FilterDsl<T::PrimaryKey>, + Filter<T::Query, T::PrimaryKey>: , +{ + type Filter = Filter<T::Query, T::PrimaryKey>; +} + +fn main() { + let x: <AlternateTable as HandleDelete>::Filter = "Hello, world"; + println!("{}", x); +} |