fixed typos and add ListTopics implementation.
diff --git a/examples/tips/subscriber.h b/examples/tips/subscriber.h
index d991114..ed706ff 100644
--- a/examples/tips/subscriber.h
+++ b/examples/tips/subscriber.h
@@ -48,14 +48,14 @@
Subscriber(std::shared_ptr<ChannelInterface> channel);
void Shutdown();
- Status CreateSubscription(const string& topic,
- const string& name);
+ Status CreateSubscription(const grpc::string& topic,
+ const grpc::string& name);
- Status GetSubscription(const string& name, string* topic);
+ Status GetSubscription(const grpc::string& name, grpc::string* topic);
- Status DeleteSubscription(const string& name);
+ Status DeleteSubscription(const grpc::string& name);
- Status Pull(const string& name, string* data);
+ Status Pull(const grpc::string& name, grpc::string* data);
private:
std::unique_ptr<tech::pubsub::SubscriberService::Stub> stub_;