Add impl Matcher<&()> for ()

PiperOrigin-RevId: 684462112

Author: bjacotg

googletest/src/matchers/tuple_matcher.rs

@@ -44,6 +44,16 @@ pub mod internal {
         }
     }
 
+    impl Matcher<&()> for () {
+        fn matches(&self, _: &()) -> MatcherResult {
+            MatcherResult::Match
+        }
+
+        fn describe(&self, matcher_result: MatcherResult) -> Description {
+            <Self as Matcher<()>>::describe(self, matcher_result)
+        }
+    }
+
     /// Generates a tuple matcher for tuples of a specific length.
     ///
     /// **For internal use only. API stablility is not guaranteed!**

googletest/tests/tuple_matcher_test.rs

@@ -21,6 +21,12 @@ fn empty_matcher_matches_empty_tuple() -> Result<()> {
     verify_that!((), ())
 }
 
+#[test]
+fn empty_matcher_matches_empty_tuple_reference() -> Result<()> {
+    let a_ok: std::result::Result<(), String> = Ok(()); // Non copy
+    verify_that!(a_ok, ok(()))
+}
+
 #[test]
 fn singleton_matcher_matches_matching_singleton_tuple() -> Result<()> {
     verify_that!((123,), (eq(123),))