1 files changed, 69 insertions, 0 deletions
diff --git a/src/test/ui/nll/user-annotations/adt-nullary-enums.rs b/src/test/ui/nll/user-annotations/adt-nullary-enums.rs
new file mode 100644
index 000000000..53853668d
--- /dev/null
+++ b/src/test/ui/nll/user-annotations/adt-nullary-enums.rs
@@ -0,0 +1,69 @@
+// Unit test for the "user substitutions" that are annotated on each
+// node.
+
+#![allow(warnings)]
+
+use std::cell::Cell;
+
+enum SomeEnum<T> {
+    SomeVariant(T),
+    SomeOtherVariant,
+}
+
+fn combine<T>(_: T, _: T) { }
+
+fn no_annot() {
+    let c = 66;
+    combine(SomeEnum::SomeVariant(Cell::new(&c)), SomeEnum::SomeOtherVariant);
+}
+
+fn annot_underscore() {
+    let c = 66;
+    combine(SomeEnum::SomeVariant(Cell::new(&c)), SomeEnum::SomeOtherVariant::<Cell<_>>);
+}
+
+fn annot_reference_any_lifetime() {
+    let c = 66;
+    combine(SomeEnum::SomeVariant(Cell::new(&c)), SomeEnum::SomeOtherVariant::<Cell<&u32>>);
+}
+
+fn annot_reference_static_lifetime() {
+    let c = 66;
+    combine(
+        SomeEnum::SomeVariant(Cell::new(&c)), //~ ERROR
+        SomeEnum::SomeOtherVariant::<Cell<&'static u32>>,
+    );
+}
+
+fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
+    let c = 66;
+    combine(
+        SomeEnum::SomeVariant(Cell::new(&c)), //~ ERROR
+        SomeEnum::SomeOtherVariant::<Cell<&'a u32>>,
+    );
+}
+
+fn annot_reference_named_lifetime_ok<'a>(c: &'a u32) {
+    combine(SomeEnum::SomeVariant(Cell::new(c)), SomeEnum::SomeOtherVariant::<Cell<&'a u32>>);
+}
+
+fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
+    let _closure = || {
+        let c = 66;
+        combine(
+            SomeEnum::SomeVariant(Cell::new(&c)), //~ ERROR
+            SomeEnum::SomeOtherVariant::<Cell<&'a u32>>,
+        );
+    };
+}
+
+fn annot_reference_named_lifetime_in_closure_ok<'a>(c: &'a u32) {
+    let _closure = || {
+        combine(
+            SomeEnum::SomeVariant(Cell::new(c)),
+            SomeEnum::SomeOtherVariant::<Cell<&'a u32>>,
+        );
+    };
+}
+
+fn main() { }