1 files changed, 61 insertions, 0 deletions
diff --git a/src/test/ui/methods/method-projection.rs b/src/test/ui/methods/method-projection.rs
new file mode 100644
index 000000000..21d983f19
--- /dev/null
+++ b/src/test/ui/methods/method-projection.rs
@@ -0,0 +1,61 @@
+// run-pass
+// Test that we can use method notation to call methods based on a
+// projection bound from a trait. Issue #20469.
+
+trait MakeString {
+    fn make_string(&self) -> String;
+}
+
+impl MakeString for isize {
+    fn make_string(&self) -> String {
+        format!("{}", *self)
+    }
+}
+
+impl MakeString for usize {
+    fn make_string(&self) -> String {
+        format!("{}", *self)
+    }
+}
+
+trait Foo {
+    type F: MakeString;
+
+    fn get(&self) -> &Self::F;
+}
+
+fn foo<F:Foo>(f: &F) -> String {
+    f.get().make_string()
+}
+
+struct SomeStruct {
+    field: isize,
+}
+
+impl Foo for SomeStruct {
+    type F = isize;
+
+    fn get(&self) -> &isize {
+        &self.field
+    }
+}
+
+struct SomeOtherStruct {
+    field: usize,
+}
+
+impl Foo for SomeOtherStruct {
+    type F = usize;
+
+    fn get(&self) -> &usize {
+        &self.field
+    }
+}
+
+fn main() {
+    let x = SomeStruct { field: 22 };
+    assert_eq!(foo(&x), format!("22"));
+
+    let x = SomeOtherStruct { field: 44 };
+    assert_eq!(foo(&x), format!("44"));
+}