1 files changed, 12 insertions, 0 deletions
diff --git a/clang/unittests/Format/FormatTestProto.cpp b/clang/unittests/Format/FormatTestProto.cpp
index 1d6b7502e09..6db44c765b4 100644
--- a/clang/unittests/Format/FormatTestProto.cpp
+++ b/clang/unittests/Format/FormatTestProto.cpp
@@ -478,5 +478,17 @@ TEST_F(FormatTestProto, FormatsRepeatedListInitializersInOptions) {
                "};");
 }
 
+TEST_F(FormatTestProto, AcceptsOperatorAsKeyInOptions) {
+  verifyFormat("option (MyProto.options) = {\n"
+               "  bbbbbbbbb: <\n"
+               "    ccccccccccccccccccccccc: <\n"
+               "      operator: 1\n"
+               "      operator: 2\n"
+               "      operator { key: value }\n"
+               "    >\n"
+               "  >\n"
+               "};");
+}
+
 } // end namespace tooling
 } // end namespace clang