Add hypothetical support for ranges with only an upper bound

Note that this doesn't add the surface syntax.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/libcoretest/ops.rs b/src/libcoretest/ops.rs
index a8889ce9e34..3c8a6d480f7 100644
--- a/src/libcoretest/ops.rs
+++ b/src/libcoretest/ops.rs
@@ -56,6 +56,12 @@ fn test_range_from() {
 }
 
 #[test]
+fn test_range_to() {
+    // Not much to test.
+    let _ = RangeTo { end: 42u };
+}
+
+#[test]
 fn test_full_range() {
     // Not much to test.
     let _ = FullRange;