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-rw-r--r--src/test/ui/chalkify/type_implied_bound.rs29
1 files changed, 29 insertions, 0 deletions
diff --git a/src/test/ui/chalkify/type_implied_bound.rs b/src/test/ui/chalkify/type_implied_bound.rs
new file mode 100644
index 000000000..8673f5319
--- /dev/null
+++ b/src/test/ui/chalkify/type_implied_bound.rs
@@ -0,0 +1,29 @@
+// run-pass
+// compile-flags: -Z chalk
+
+trait Eq { }
+trait Hash: Eq { }
+
+impl Eq for i32 { }
+impl Hash for i32 { }
+
+struct Set<T: Hash> {
+ _x: T,
+}
+
+fn only_eq<T: Eq>() { }
+
+fn take_a_set<T>(_: &Set<T>) {
+ // `Set<T>` is an input type of `take_a_set`, hence we know that
+ // `T` must implement `Hash`, and we know in turn that `T` must
+ // implement `Eq`.
+ only_eq::<T>()
+}
+
+fn main() {
+ let set = Set {
+ _x: 5,
+ };
+
+ take_a_set(&set);
+}