diff --git a/examples/s2/src/extras.h b/examples/s2/src/extras.h
new file mode 100644
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+++ b/examples/s2/src/extras.h
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+// Copyright 2020 Google LLC
+//  
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//  
+//    https://www.apache.org/licenses/LICENSE-2.0 
+//  
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include "s2/r2.h"
+#include <sstream>
+
+// autocxx isn't yet smart enough to do anything with the R2Point
+// structure, so here we've manually made a cheeky little API to
+// do something useful with it.
+inline std::string describe_point(R2Point pt) {
+    std::ostringstream oss;
+    oss << pt.x() << ", " << pt.y();
+    return oss.str();
+}