diff options
Diffstat (limited to 'src/test/ui/traits/issue-90662-projection-caching.rs')
-rw-r--r-- | src/test/ui/traits/issue-90662-projection-caching.rs | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/test/ui/traits/issue-90662-projection-caching.rs b/src/test/ui/traits/issue-90662-projection-caching.rs new file mode 100644 index 000000000..879f30071 --- /dev/null +++ b/src/test/ui/traits/issue-90662-projection-caching.rs @@ -0,0 +1,34 @@ +// check-pass + +// Regression test for issue #90662 +// Tests that projection caching does not cause a spurious error + +trait HasProvider<T: ?Sized> {} +trait Provider<M> { + type Interface: ?Sized; +} + +trait Repository {} +trait Service {} + +struct DbConnection; +impl<M> Provider<M> for DbConnection { + type Interface = DbConnection; +} + +struct RepositoryImpl; +impl<M: HasProvider<DbConnection>> Provider<M> for RepositoryImpl { + type Interface = dyn Repository; +} + +struct ServiceImpl; +impl<M: HasProvider<dyn Repository>> Provider<M> for ServiceImpl { + type Interface = dyn Service; +} + +struct TestModule; +impl HasProvider<<DbConnection as Provider<Self>>::Interface> for TestModule {} +impl HasProvider<<RepositoryImpl as Provider<Self>>::Interface> for TestModule {} +impl HasProvider<<ServiceImpl as Provider<Self>>::Interface> for TestModule {} + +fn main() {} |