Add test

tests/ui/enum/error-variant-with-turbofishes.rs

@@ -0,0 +1,8 @@
+enum Struct<const N: usize> { Variant { x: [(); N] } }
+
+fn test() {
+    let x = Struct::<0>::Variant;
+    //~^ ERROR expected value, found struct variant `Struct<0>::Variant`
+}
+
+fn main() {}

tests/ui/enum/error-variant-with-turbofishes.stderr

@@ -0,0 +1,9 @@
+error[E0533]: expected value, found struct variant `Struct<0>::Variant`
+  --> $DIR/error-variant-with-turbofishes.rs:4:13
+   |
+LL |     let x = Struct::<0>::Variant;
+   |             ^^^^^^^^^^^^^^^^^^^^ not a value
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0533`.