35 lines
865 B
Rust
35 lines
865 B
Rust
// check-pass
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// Regression test for issue #90662
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// Tests that projection caching does not cause a spurious error
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trait HasProvider<T: ?Sized> {}
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trait Provider<M> {
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type Interface: ?Sized;
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}
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trait Repository {}
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trait Service {}
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struct DbConnection;
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impl<M> Provider<M> for DbConnection {
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type Interface = DbConnection;
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}
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struct RepositoryImpl;
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impl<M: HasProvider<DbConnection>> Provider<M> for RepositoryImpl {
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type Interface = dyn Repository;
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}
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struct ServiceImpl;
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impl<M: HasProvider<dyn Repository>> Provider<M> for ServiceImpl {
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type Interface = dyn Service;
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}
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struct TestModule;
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impl HasProvider<<DbConnection as Provider<Self>>::Interface> for TestModule {}
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impl HasProvider<<RepositoryImpl as Provider<Self>>::Interface> for TestModule {}
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impl HasProvider<<ServiceImpl as Provider<Self>>::Interface> for TestModule {}
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fn main() {}
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